WO2020100954A1 - 抗cdh6抗体-ピロロベンゾジアゼピン誘導体コンジュゲート - Google Patents
抗cdh6抗体-ピロロベンゾジアゼピン誘導体コンジュゲート Download PDFInfo
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Definitions
- the present invention relates to an antibody-drug conjugate useful as an antitumor drug, in which an anti-CDH6 antibody that binds to CDH6 and has an internalizing action and a pyrrolobenzodiazepine derivative are linked via a linker structure portion.
- Cadherin is a glycoprotein present on the surface of cell membranes, which binds N-terminal extracellular domains in a calcium ion-dependent manner to serve as an intercellular adhesion molecule and a signaling molecule responsible for intercellular interactions. Function.
- the molecular group classified as classic cadherin is a single transmembrane protein composed of 5 extracellular domains (extracellular domain, EC domain), 1 transmembrane region, and intracellular domain.
- Classic cadherins are classified into a type I family represented by E-cadherin and N-cadherin and a type II family based on amino acid sequence homology.
- Cadherin-6 (Cadherin-6, CDH6) is a single transmembrane protein consisting of 790 amino acids classified into the type II cadherin family, and has an N-terminal side extracellular and a C-terminal side intracellular.
- the human CDH6 gene was first cloned in 1995 (Non-patent document 1), and can be referred to by accession numbers such as NM_004932 and NP_004923 (NCBI).
- CDH6 is specifically expressed in the brain and kidney at the developmental stage, and circuit formation in the central nervous system (Non-Patent Documents 2 and 3) and nephron generation in the kidney (Non-Patent Documents 4 and 5). ) has been reported to play an important role. In normal adult tissues, CDH6 expression is restricted to renal tubules, bile duct epithelial cells and the like.
- Non-Patent Documents 6 and 7 High expression of CDH6 has also been reported in human ovarian cancer (Non-patent document 8), and it has also been reported that CDH6 is involved in epithelial-mesenchymal transition and metastasis of human thyroid cancer (Non-patent document 9). Further, it has been reported that CDH6 is also expressed in human cholangiocarcinoma and human small cell lung cancer (Non-patent Documents 12 and 13).
- ⁇ Cancer is the top cause of death, and the number of morbidity is expected to increase with the aging of the population, but the need for treatment is not yet fully met.
- the conventional chemotherapeutic agents have a low selectivity, so that they are not only effective for tumor cells but also for normal cells, and have side effects. The inability to do is a problem. Therefore, in recent years, the development of highly selective molecular targeting drugs and antibody drugs targeting molecules that show mutations and high expression characteristic of cancer cells, and specific molecules involved in cell canceration It is being appreciated.
- Antibodies are highly stable in blood and are expected to reduce side effects because they specifically bind to target antigens, and many antibody drugs against molecules highly expressed on the surface of cancer cells have been developed.
- An antibody-drug conjugate (Antibody-Drug Conjugate; ADC) is mentioned as one of the techniques utilizing the antigen-specific binding ability of an antibody.
- ADC is an antibody that binds to an antigen expressed on the surface of a cancer cell, and binds a drug having cytotoxic activity to an antibody that can internalize the antigen into the cell.
- the ADC can be expected to accumulate the drug in the cancer cell and kill the cancer cell by being able to efficiently deliver the drug to the cancer cell (Non-Patent Document 10, Patent Documents 1 and 2).
- ADCETRIS (trademark) (brentuximab vedotin) obtained by binding anti-CD30 monoclonal antibody to monomethylauristatin E has been approved as a therapeutic agent for Hodgkin lymphoma and anaplastic large cell lymphoma.
- Kadcyla (trademark) (trastuzumab emtansine) in which emtansine is bound to an anti-HER2 monoclonal antibody is used for treatment of HER2-positive advanced and recurrent breast cancer.
- the target antigen suitable for ADC as an antitumor drug is that it is highly expressed specifically on the surface of cancer cells and low or not expressed in normal cells, that it can be internalized in cells, and the antigen is It is not secreted from the surface.
- An important feature of an antibody suitable for ADC is that it has a high internalization ability in addition to specifically binding to a target antigen.
- the ability of an antibody to internalize depends on the properties of both the target antigen and the antibody.Therefore, an antigen-binding site suitable for internalization can be deduced from the molecular structure of the target, and the internalization ability can be easily determined from the binding strength and physical properties of the antibody. It is difficult to guess an antibody with a high chemical potential. Therefore, obtaining an antibody having a high internalization ability against the target antigen has been an important issue in developing a highly effective ADC (Non-Patent Document 11).
- PBD pyrrolobenzodiazepine
- PBDs differ in the number, kind, and site of substituents in the A and C ring portions, respectively, and also in the degree of unsaturation in the B and C ring portions, respectively.
- Non-patent Documents 18 and 19 Non-patent Documents 18 and 19
- various dimeric PBDs converted to ADC have been reported ( Patent Documents 4 to 16).
- PBD having a spiro ring at the C2 position or its ADC form is not known.
- the object of the present invention is to an antibody having a high internalization activity that specifically binds to CDH6, an antibody-drug conjugate having a high antitumor activity containing the antibody, and a tumor using the antibody-drug conjugate. It is intended to provide a drug having a therapeutic effect, a method for treating a tumor using the antibody, the antibody-drug conjugate, or the drug.
- the present inventors have conducted extensive studies to achieve the above-mentioned object, and surprisingly, an antibody that specifically binds to extracellular domain 3 of CDH6 (also referred to as EC3 in the present specification) expresses CDH6. It has been found that these cells have extremely high internalizing activity in cells that are effective as ADC antibodies. Further, the present inventors have succeeded in obtaining an anti-CDH6 antibody-drug conjugate in which the anti-CDH6 antibody and a novel PBD derivative are bound, and the anti-CDH6 antibody-drug conjugate exhibits a strong antitumor activity. I found that.
- m 2 represents an integer of 1 or 2
- Ab is an IgG antibody or a functional fragment of the antibody, which specifically binds to an amino acid sequence including the amino acid sequence of SEQ ID NO: 4 and has internalization ability to be taken up into cells
- L is a linker that connects D with a sugar chain (N297 sugar chain) that binds to N297 of Ab
- the N297 sugar chain represents a sugar chain that may be remodeled
- D is the following:
- An antibody-drug conjugate represented by: [2] The binding of the antibody or the functional fragment of the antibody to the amino acid sequence containing the amino acid sequence set forth in SEQ ID NO: 4 below (1) to (8): (1) an antibody having a light chain consisting of the 21st to 233rd amino acid sequences of SEQ ID NO: 23 and a heavy chain consisting of the 20th to 471st amino acid sequences of SEQ ID NO: 26, (2) an antibody having a light chain consisting of the 21st to 233rd amino acid sequences of SEQ ID NO: 31 and a heavy chain consisting of the 20th to 471st amino acid sequences of SEQ ID NO: 39, (3) an antibody having a light chain consisting of the 21st to 233rd amino acid sequences of SEQ ID NO: 31 and a heavy chain consisting of the 20th to 471st amino acid sequences of SEQ ID NO: 43, (4) an antibody
- the antibody or a functional fragment of the antibody has the following (1) to (4): (1) From CDRL1 consisting of the amino acid sequence of SEQ ID NO: 12, CDRL2 consisting of the amino acid sequence of SEQ ID NO: 13 and CDRL3 consisting of the amino acid sequence of SEQ ID NO: 14, and the amino acid sequence of SEQ ID NO: 17.
- CDRL1 consisting of the amino acid sequence of SEQ ID NO: 12
- CDRL2 consisting of the amino acid sequence of SEQ ID NO: 13 and CDRL3 consisting of the amino acid sequence of SEQ ID NO: 14, and the amino acid sequence of SEQ ID NO: 17.
- CDRH1 consisting of the amino acid sequence of SEQ ID NO: 30 and CDRH2 consisting of the amino acid sequence of SEQ ID NO: 19,
- CDRL1 consisting of the amino acid sequence of SEQ ID NO: 12
- CDRL2 consisting of the amino acid sequence of SEQ ID NO: 13
- CDRL3 consisting of the amino acid sequence of SEQ ID NO: 14
- CDRL1 consisting of the amino acid sequence set forth in SEQ ID NO: 12
- CDRL2 consisting of the amino acid sequence of SEQ ID NO: 13
- CDRL3 consisting of the amino acid sequence of SEQ ID NO: 14
- CDRL1 consisting of the amino acid sequence set forth in SEQ ID NO: 58
- CDRH2 consisting of the amino acid sequence set forth in SEQ ID NO: 59
- CDRL1 consisting of the amino acid sequence set forth in SEQ ID NO: 12
- amino acid set forth in SEQ ID NO: 13 consisting of the amino acid sequence of S
- CDRL2 consisting of the sequence and CDRL3 consisting of the amino acid sequence set forth in SEQ ID NO: 14, and CDRH1 consisting of the amino acid sequence set forth in SEQ ID NO: 62, CDRH2 consisting of the amino acid sequence set forth in SEQ ID NO: 63 and the amino acid set forth in SEQ ID NO: 64
- CDRH3 consisting of a sequence, Comprising CDRL1, CDRL2 and CDRL3 selected from the group consisting of and CDRH1, CDRH2 and CDRH3 The antibody-drug conjugate according to any one of [1] or [2].
- the antibody or a functional fragment of the antibody has the following (1) to (4): (1) a light chain variable region consisting of the amino acid sequence set forth in SEQ ID NO: 33, (2) a light chain variable region consisting of the amino acid sequence of SEQ ID NO: 37, (3) An amino acid sequence having at least 95% or more sequence identity with the sequence of the framework region other than each CDR sequence in the amino acid sequence of (1) or (2), and (4) (1) to (3) ),
- the variable light chain according to any one of the amino acid sequences selected from the group consisting of amino acid sequences in which one or several amino acids are deleted, substituted or added in the framework region sequence other than each CDR sequence.
- the antibody or a functional fragment of the antibody has the following (1) to (6): (1) a light chain variable region consisting of the amino acid sequence of SEQ ID NO: 33 and a heavy chain variable region consisting of the amino acid sequence of SEQ ID NO: 41, (2) a light chain variable region consisting of the amino acid sequence of SEQ ID NO: 33 and a heavy chain variable region consisting of the amino acid sequence of SEQ ID NO: 45, (3) a light chain variable region consisting of the amino acid sequence of SEQ ID NO: 37 and a heavy chain variable region consisting of the amino acid sequence of SEQ ID NO: 45, (4) a light chain variable region consisting of the amino acid sequence of SEQ ID NO: 33 and a heavy chain variable region consisting of the amino acid sequence of SEQ ID NO: 49, (5) Light chain variable region consisting of the amino acid sequence of SEQ ID NO: 33 and heavy chain variable region consisting of the amino acid sequence of SEQ ID NO
- the antibody or a functional fragment of the antibody has a light chain consisting of the 21st to 233rd amino acid sequences of SEQ ID NO: 31 and a heavy chain consisting of the 20th to 471st amino acid sequences of SEQ ID NO: 43, [6 ] The antibody-drug conjugate as described in].
- the antibody or the functional fragment of the antibody has a light chain consisting of the 21st to 233rd amino acid sequences of SEQ ID NO: 35 and a heavy chain consisting of the 20th to 471st amino acid sequences of SEQ ID NO: 43, [6 ] The antibody-drug conjugate as described in].
- the antibody or the functional fragment of the antibody has a light chain consisting of the 21st to 233rd amino acid sequences of SEQ ID NO: 31 and a heavy chain consisting of the 20th to 471st amino acid sequences of SEQ ID NO: 47.
- the antibody or the functional fragment of the antibody has a light chain consisting of the 21st to 233rd amino acid sequence of SEQ ID NO: 31 and a heavy chain consisting of the 20th to 471st amino acid sequence of SEQ ID NO: 65
- the antibody or the functional fragment of the antibody has a light chain consisting of the 21st to 233rd amino acid sequence of SEQ ID NO: 31 and a heavy chain consisting of the 20th to 471st amino acid sequence of SEQ ID NO: 67
- the antibody or the functional fragment of the antibody has a light chain consisting of the 21st to 233rd amino acid sequences of SEQ ID NO: 31 and a heavy chain consisting of the 20th to 471st amino acid sequences of SEQ ID NO: 69
- * indicates that it is bonded to the nitrogen atom at the N10 ′ position of D
- B is a 1,4-phenyl group, a 2,5-pyridyl group, a 3,6-pyridyl group, a 2,5-pyrimidyl group or a 2,5-thienyl group
- the antibody-drug conjugate according to any one of [1] to [15] which shows that it is bound to the formed sugar chain.
- N297 sugar chain is N297- (Fuc) MSG1, N297- (Fuc) MSG2 or a mixture thereof having a structure represented by the following formula, or N297- (Fuc) SG, [1] to [18] ]
- the antibody-drug conjugate according to any one of:
- the wavy line indicates binding to the antibody Asn297
- * -L (PEG)-in the N297 sugar chain represents *-(CH 2 CH 2 -O) n 5 -CH 2 CH 2 -NH-
- n 5 is an integer of 2 to 5
- the amino group at the right end is the non-reducing end on the 1-3 chain side or / and the 1-6 chain side of the ⁇ -Man branched chain of the N297 sugar chain.
- sialic acid of the formula (1) and the carboxylic acid of the sialic acid of the formula (2) are amide-bonded to each other, and the symbol * indicates that they are bonded to the nitrogen atom of the 1-position or 3-position on the triazole ring in each structural formula.
- m 2 is an integer of 1 or 2
- Ab specifically binds to an amino acid sequence including the amino acid sequence set forth in SEQ ID NO: 4 and has an internalizing ability to be taken up into cells, which is an IgG antibody or a functional fragment of the antibody
- the N297 sugar chain of Ab is any one of N297- (Fuc) MSG1, N297- (Fuc) MSG2 or a mixture thereof having a structure represented by the following formula, or N297- (Fuc) SG,
- the wavy line indicates that it is bound to the antibody Asn297 (N297)
- * -L (PEG)-in the N297 sugar chain indicates *-(CH 2 CH 2 —O) 3 —CH 2 CH 2 —NH—
- the amino group at the right end is amide-bonded with the carboxylic acid at the 2-position of the sialic acid at the non-reducing end on the 1-3 chain side or / and the 1-6 chain side of the ⁇ -Man branched chain of the N297 sugar chain.
- the antibody-drug conjugate which is shown to have a bond with a nitrogen atom at position 1 or 3 on the triazole ring in each structural formula.
- the compound represented by the formula (XII) has the following formula (XII ′):
- m 2 is an integer of 1 or 2
- Ab specifically binds to an amino acid sequence including the amino acid sequence set forth in SEQ ID NO: 4 and has an internalizing ability to be taken up into cells, which is an IgG antibody or a functional fragment of the antibody
- the N297 sugar chain of Ab is any one of N297- (Fuc) MSG1, N297- (Fuc) MSG2 or a mixture thereof having a structure represented by the following formula, or N297- (Fuc) SG,
- the wavy line indicates that it is bound to the antibody Asn297 (N297)
- * -L (PEG)-in the N297 sugar chain indicates *-(CH 2 CH 2 —O) 3 —CH 2 CH 2 —NH—
- the amino group at the right end is amide-bonded with the carboxylic acid at the 2-position of the sialic acid at the non-reducing end on the 1-3 chain side or / and the 1-6 chain side of the ⁇ -Man branched chain of the N297 sugar chain.
- the antibody-drug conjugate which is shown to have a bond with a nitrogen atom at position 1 or 3 on the triazole ring in each structural formula.
- the compound represented by the formula (XIII) has the following formula (XIII ′):
- m 2 is an integer of 1 or 2
- Ab specifically binds to an amino acid sequence including the amino acid sequence set forth in SEQ ID NO: 4 and has an internalizing ability to be taken up into cells, which is an IgG antibody or a functional fragment of the antibody
- the N297 sugar chain of Ab is any one of N297- (Fuc) MSG1, N297- (Fuc) MSG2 or a mixture thereof having a structure represented by the following formula, or N297- (Fuc) SG,
- the wavy line indicates that it is bound to the antibody Asn297 (N297)
- * -L (PEG)-in the N297 sugar chain indicates *-(CH 2 CH 2 —O) 3 —CH 2 CH 2 —NH—
- the amino group at the right end is amide-bonded with the carboxylic acid at the 2-position of the sialic acid at the non-reducing end on the 1-3 chain side or / and the 1-6 chain side of the ⁇ -Man branched chain of the N297 sugar chain.
- the antibody-drug conjugate which is shown to have a bond with a nitrogen atom at position 1 or 3 on the triazole ring in each structural formula.
- the compound represented by the formula (XIV) has the following formula (XIV ′):
- m 2 is an integer of 1 or 2
- Ab specifically binds to an amino acid sequence including the amino acid sequence set forth in SEQ ID NO: 4 and has an internalizing ability to be taken up into cells, which is an IgG antibody or a functional fragment of the antibody
- the N297 sugar chain of Ab is any one of N297- (Fuc) MSG1, N297- (Fuc) MSG2 or a mixture thereof having a structure represented by the following formula, or N297- (Fuc) SG,
- the wavy line indicates that it is bound to the antibody Asn297 (N297)
- * -L (PEG)-in the N297 sugar chain indicates *-(CH 2 CH 2 —O) 3 —CH 2 CH 2 —NH—
- the amino group at the right end is amide-bonded with the carboxylic acid at the 2-position of the sialic acid at the non-reducing end on the 1-3 chain side or / and the 1-6 chain side of the ⁇ -Man branched chain of the N297 sugar chain.
- the antibody-drug conjugate which is shown to have a bond with a nitrogen atom at position 1 or 3 on the triazole ring in each structural formula.
- the compound represented by the formula (XV) has the following formula (XV ′):
- the antibody-drug conjugate according to [27], which is represented by: [29] The antibody or a functional fragment of the antibody has the following (1) to (4): (1) From CDRL1 consisting of the amino acid sequence of SEQ ID NO: 12, CDRL2 consisting of the amino acid sequence of SEQ ID NO: 13 and CDRL3 consisting of the amino acid sequence of SEQ ID NO: 14, and the amino acid sequence of SEQ ID NO: 17.
- CDRH1 consisting of the amino acid sequence of SEQ ID NO: 18 and CDRH2 consisting of the amino acid sequence of SEQ ID NO: 19,
- CDRL1 consisting of the amino acid sequence of SEQ ID NO: 12
- CDRL2 consisting of the amino acid sequence of SEQ ID NO: 13
- CDRL3 consisting of the amino acid sequence of SEQ ID NO: 14, and the amino acid sequence of SEQ ID NO: 17.
- CDRH1 consisting of the amino acid sequence of SEQ ID NO: 30 and CDRH2 consisting of the amino acid sequence of SEQ ID NO: 19,
- CDRL1 consisting of the amino acid sequence of SEQ ID NO: 12
- CDRL2 consisting of the amino acid sequence of SEQ ID NO: 13
- CDRL3 consisting of the amino acid sequence of SEQ ID NO: 14
- CDRL1 consisting of the amino acid sequence set forth in SEQ ID NO: 12
- CDRL2 consisting of the amino acid sequence of SEQ ID NO: 13
- CDRL3 consisting of the amino acid sequence of SEQ ID NO: 14
- CDRL1 consisting of the amino acid sequence set forth in SEQ ID NO: 58
- CDRH2 consisting of the amino acid sequence set forth in SEQ ID NO: 59
- CDRL1 consisting of the amino acid sequence set forth in SEQ ID NO: 12
- amino acid set forth in SEQ ID NO: 13 consisting of the amino acid sequence of S
- CDRL2 consisting of the sequence and CDRL3 consisting of the amino acid sequence set forth in SEQ ID NO: 14, and CDRH1 consisting of the amino acid sequence set forth in SEQ ID NO: 62, CDRH2 consisting of the amino acid sequence set forth in SEQ ID NO: 63 and the amino acid set forth in SEQ ID NO: 64
- CDRH3 consisting of a sequence, Comprising CDRL1, CDRL2 and CDRL3 selected from the group consisting of and CDRH1, CDRH2 and CDRH3 The antibody-drug conjugate according to any one of [21] to [28].
- the antibody or a functional fragment of the antibody has the following (1) to (6): (1) a light chain variable region consisting of the amino acid sequence of SEQ ID NO: 33 and a heavy chain variable region consisting of the amino acid sequence of SEQ ID NO: 41, (2) a light chain variable region consisting of the amino acid sequence of SEQ ID NO: 33 and a heavy chain variable region consisting of the amino acid sequence of SEQ ID NO: 45, (3) a light chain variable region consisting of the amino acid sequence of SEQ ID NO: 37 and a heavy chain variable region consisting of the amino acid sequence of SEQ ID NO: 45, (4) a light chain variable region consisting of the amino acid sequence of SEQ ID NO: 33 and a heavy chain variable region consisting of the amino acid sequence of SEQ ID NO: 49, (5) Light chain variable region consisting of the amino acid sequence of SEQ ID NO: 33 and heavy chain variable region consisting of the amino acid sequence of SEQ ID NO: 55, or (6) Light chain variable region consisting of the amino acid sequence of SEQ ID NO: 33
- the antibody or the functional fragment of the antibody has a light chain consisting of the 21st to 233rd amino acid sequences of SEQ ID NO: 31 and a heavy chain consisting of the 20th to 471st amino acid sequences of SEQ ID NO: 43.
- the antibody or the functional fragment of the antibody has a light chain consisting of the 21st to 233rd amino acid sequences of SEQ ID NO: 35 and a heavy chain consisting of the 20th to 471st amino acid sequences of SEQ ID NO: 43, [31] ] The antibody-drug conjugate as described in].
- the antibody or the functional fragment of the antibody has a light chain consisting of the 21st to 233rd amino acid sequence of SEQ ID NO: 31 and a heavy chain consisting of the 20th to 471st amino acid sequence of SEQ ID NO: 47. [31] ] The antibody-drug conjugate as described in]. [36] The antibody or the functional fragment of the antibody has a light chain consisting of the 21st to 233rd amino acid sequence of SEQ ID NO: 31 and a heavy chain consisting of the 20th to 471st amino acid sequence of SEQ ID NO: 65, [31 ] The antibody-drug conjugate as described in].
- the antibody or the functional fragment of the antibody has a light chain consisting of the 21st to 233rd amino acid sequence of SEQ ID NO: 31 and a heavy chain consisting of the 20th to 471st amino acid sequence of SEQ ID NO: 67, [31] ] The antibody-drug conjugate as described in].
- the antibody or the functional fragment of the antibody has a light chain consisting of the 21st to 233rd amino acid sequence of SEQ ID NO: 31 and a heavy chain consisting of the 20th to 471st amino acid sequence of SEQ ID NO: 69
- a method for producing a sugar chain remodeling antibody comprising: [44] The antibody-drug conjugate according to any one of [1] to [42], which comprises a step of reacting a sugar chain remodeling antibody obtained by the method according to [43] with a drug linker. Production method. [45] The antibody-drug conjugate according to any one of [1] to [42], which is produced by the method according to [44].
- a light chain variable region comprising CDRL1 consisting of the amino acid sequence of SEQ ID NO: 12, CDRL2 consisting of the amino acid sequence of SEQ ID NO: 13 and CDRL3 consisting of the amino acid sequence of SEQ ID NO: 14, and SEQ ID NO: 57
- An antibody or a functional fragment thereof comprising a heavy chain variable region comprising CDRH1 consisting of the amino acid sequence described in above, CDRH2 consisting of the amino acid sequence described in SEQ ID NO: 58, and CDRH3 consisting of the amino acid sequence described in SEQ ID NO: 59.
- the antibody or the functional fragment thereof according to [46] which comprises a light chain variable region consisting of the amino acid sequence of SEQ ID NO: 33 and a heavy chain variable region consisting of the amino acid sequence of SEQ ID NO: 55.
- the antibody or the functional fragment thereof according to [47] which comprises a light chain variable region consisting of the amino acid sequence of SEQ ID NO: 33 and a heavy chain variable region consisting of the amino acid sequence of SEQ ID NO: 60.
- the antibody or the antibody thereof according to [46] or [48] which has a light chain consisting of the 21st to 233rd amino acid sequence of SEQ ID NO: 31 and a heavy chain consisting of the 20th to 471st amino acid sequence of SEQ ID NO: 67.
- Functional fragment [51] The antibody or the antibody thereof according to [47] or [49], which has a light chain consisting of the 21st to 233rd amino acid sequence of SEQ ID NO: 31 and a heavy chain consisting of the 20th to 471st amino acid sequence of SEQ ID NO: 69. Functional fragment. [52] An antibody or a functional fragment thereof having a light chain consisting of the 21st to 233rd amino acid sequence of SEQ ID NO: 31 and a heavy chain consisting of the 20th to 471st amino acid sequence of SEQ ID NO: 65. [53] A polynucleotide encoding the antibody according to any one of [46] to [52].
- [55] A host cell transformed with the expression vector according to [54].
- [57] An antibody or a functional fragment of the antibody obtained by the production method according to [56].
- a pharmaceutical composition comprising a functional fragment of the antibody.
- the tumor is renal cell carcinoma, renal clear cell carcinoma, papillary renal cell carcinoma, ovarian cancer, ovarian serous adenocarcinoma, thyroid cancer, cholangiocarcinoma, lung cancer, small cell lung cancer, non-small cell lung cancer, glioblastoma
- the pharmaceutical composition according to [60] which is mesothelioma, uterine cancer, pancreatic cancer, Wilms tumor or neuroblastoma.
- the tumor is renal cell carcinoma, renal clear cell carcinoma, papillary renal cell carcinoma, ovarian cancer, ovarian serous adenocarcinoma, thyroid cancer, cholangiocarcinoma, lung cancer, small cell lung cancer, non-small cell lung cancer, glioblastoma [62] or [63], which is a tumor, mesothelioma, uterine cancer, pancreatic cancer, Wilms tumor or neuroblastoma.
- the anti-CDH6 antibody of the present invention is characterized by specifically recognizing EC domain 3 (EC3) of CDH6 and having high internalization activity.
- the anti-CDH6 antibody-drug conjugate in which the anti-CDH6 antibody of the present invention and the novel PBD derivative of the present invention are bound via a linker is an excellent antitumor agent when administered to a patient having a cancer cell expressing CDH6. It can be expected to achieve effects and safety. That is, the anti-CDH6 antibody-drug conjugate of the present invention is useful as an antitumor agent.
- FIG. 1 shows the results of flow cytometry in which the binding of rat anti-CDH6 monoclonal antibody rG019 or negative control antibody rat IgG2b to control cells (shaded) or hCDH6-introduced 293T cells (open solid line) was examined.
- the horizontal axis represents the fluorescence intensity of FITC, which represents the amount of antibody bound, and the vertical axis represents the number of cells.
- (1) shows the binding properties of the rat anti-CDH6 monoclonal antibody rG019 or the negative control antibody RatIgG2b to control cells (shaded) or full-length hCDH6-introduced 293 cells (open solid line).
- (2) shows the binding properties of the rat anti-CDH6 monoclonal antibody rG019 or the negative control antibody RatIgG2b to control cells (shaded) or EC1-deleted hCDH6-introduced 293 cells (open solid line).
- (3) shows the binding properties of the rat anti-CDH6 monoclonal antibody rG019 or the negative control antibody RatIgG2b to control cells (shaded) or EC2-deleted hCDH6-introduced 293 cells (open solid line).
- the horizontal axis represents the fluorescence intensity of FITC representing the amount of antibody bound
- the vertical axis represents the cell number.
- (4) shows the binding properties of the rat anti-CDH6 monoclonal antibody rG019 or the negative control antibody RatIgG2b to control cells (shaded) or EC3-deleted hCDH6-introduced 293 cells (open solid line).
- (5) shows the binding properties of the rat anti-CDH6 monoclonal antibody rG019 or the negative control antibody RatIgG2b to control cells (shaded) or EC4 deleted hCDH6 introduced 293 cells (open solid line).
- FIG. 3 shows the cell membrane surface of five human tumor cell lines (human ovarian tumor cell lines NIH: OVCAR-3, PA-1, OV-90, and human renal cell tumor cell lines 786-O, Caki-1). The result of the flow cytometry which evaluated the expression of CDH6 of this.
- the horizontal axis represents the fluorescence intensity of FITC, which represents the amount of antibody bound, and the vertical axis represents the number of cells.
- the shaded histogram shows the case of staining with the negative control mIgG1, and the histogram shown with an open solid line shows the case of staining with the anti-human CDH6 antibody.
- FIG. 4 shows the binding of the human chimeric anti-CDH6 antibody chG019 to human CDH6 and monkey CDH6.
- the horizontal axis indicates the antibody concentration, and the vertical axis indicates the amount of binding by Mean Fluorescent Intensity (mean fluorescence intensity).
- 5A shows control cells (shaded) or full-length hCDH6-introduced 293 ⁇ cells (open solid line) of four humanized hG019 antibodies (H01L02, H02L02, H02L03 and H04L02), anti-CDH6 antibody NOV0712 or negative control antibody hIgG1. It shows the binding property to.
- the horizontal axis represents the fluorescence intensity of APC representing the amount of antibody bound, and the vertical axis represents the cell number.
- FIG. 5-2 shows control cells (shaded) or EC1-deleted hCDH6-introduced 293 ⁇ cells (white) of four humanized hG019 antibodies (H01L02, H02L02, H02L03 and H04L02), anti-CDH6 antibody NOV0712 or negative control antibody hIgG1.
- Solid line shows the connectivity.
- the horizontal axis represents the fluorescence intensity of APC representing the amount of antibody bound, and the vertical axis represents the cell number.
- 5-3 shows control cells (shaded) or EC2-deleted hCDH6-introduced 293 ⁇ cells (white) of four humanized hG019 antibodies (H01L02, H02L02, H02L03 and H04L02), anti-CDH6 antibody NOV0712 or negative control antibody hIgG1.
- Solid line shows the connectivity.
- the horizontal axis represents the fluorescence intensity of APC representing the amount of antibody bound, and the vertical axis represents the cell number.
- 5-4 shows control cells (shaded) or EC3-deleted hCDH6-introduced 293 ⁇ cells (opened) of four humanized hG019 antibodies (H01L02, H02L02, H02L03 and H04L02), anti-CDH6 antibody NOV0712 or negative control antibody hIgG1.
- Solid line shows the connectivity.
- the horizontal axis represents the fluorescence intensity of APC representing the amount of antibody bound, and the vertical axis represents the cell number.
- 5-5 shows control cells (shaded) or EC4-deleted hCDH6-introduced 293 ⁇ cells (white) of four humanized hG019 antibodies (H01L02, H02L02, H02L03 and H04L02), anti-CDH6 antibody NOV0712 or negative control hIgG1.
- Solid line shows the connectivity.
- the horizontal axis represents the fluorescence intensity of APC representing the amount of antibody bound, and the vertical axis represents the cell number.
- FIG. 5-6 shows control cells (shaded) or EC5-deficient hCDH6-introduced 293 ⁇ cells (white boxes) of four humanized hG019 antibodies (H01L02, H02L02, H02L03 and H04L02), anti-CDH6 antibody NOV0712 or negative control hIgG1.
- Solid line shows the connectivity.
- the horizontal axis represents the fluorescence intensity of APC representing the amount of antibody bound, and the vertical axis represents the cell number.
- FIG. 6 shows the results of flow cytometry in which the expression of human CDH6 in the 786-O / hCDH6 stable expression cell line (open solid line) and the parental cell line 786-O (shaded) was examined.
- the horizontal axis represents the fluorescence intensity of Alexa Fluor 647, which represents the amount of antibody bound, and the vertical axis represents the number of cells.
- FIG. 7 shows four unlabeled humanized hG019 antibodies (H01L02, H02L02, H02L03 and H04L02), anti-CDH6 antibody NOV0712 or negative control hIgG1 using labeled NOV0712 (top) or labeled H01L02 (bottom).
- 3 shows a binding competition assay with.
- the horizontal axis represents the final concentration of the unlabeled antibody at the time of addition, and the vertical axis represents the binding amount as Mean Fluorescent Intensity (mean fluorescence intensity).
- NIH OVCAR-3, 786-O or PA-1 using reagent Hum-ZAP or F (ab ') 2 Fragment Goat Anti-human IgG, Fc (gamma) Fragment Specific that does not bind toxin as a negative control. The results of evaluation are shown below.
- FIG. 9 is a CDH6-positive human ovarian tumor cell line of anti-LPS antibody-PBD (ADC11), H01L02-PBD (ADC1), H01L02A-PBD (ADC5), H11L02A-PBD (ADC7), or H31L02A-PBD (ADC6).
- ADC11 anti-LPS antibody-PBD
- ADC1 H01L02-PBD
- ADC5 H01L02A-PBD
- ADC7 H11L02A-PBD
- ADC6-7 H31L02A-PBD
- FIG. 10 shows the in vivo antitumor effect of H01L02-PBD (ADC1), NOV0712-DM4 or anti-LPS antibody-PBD (ADC11).
- ADC1 H01L02-PBD
- NOV0712-DM4 NOV0712-DM4
- ADC11 anti-LPS antibody-PBD
- the CDH6-positive human ovarian tumor cell line OV-90 was evaluated using an animal model in which immunodeficient mice were transplanted.
- the horizontal axis represents the number of days, the vertical axis represents the tumor volume, and the error range represents the standard error (SE) value.
- SE standard error
- FIG. 11 shows in vivo antitumor effects of H01L02-PBD (ADC1), NOV0712-DM4, and anti-LPS antibody-PBD (ADC11).
- the CDH6-positive human renal cell tumor cell line Caki-1 was evaluated using an animal model in which immunodeficient mice were transplanted.
- the horizontal axis represents the number of days, the vertical axis represents the tumor volume, and the error range represents the standard error (SE) value.
- FIG. 12 shows the in vivo antitumor effect of H01L02-PBD (ADC1), H01L02A-PBD (ADC5), H31L02A-PBD (ADC6), and anti-LPS antibody-PBD (ADC11). Evaluation was performed using an animal model in which the CDH6-positive human ovarian tumor cell line NIH: OVCAR-3 was transplanted to immunodeficient mice.
- FIG. 13 shows the in vivo antitumor effect of H01L02-PBD (ADC1), H01L02A-PBD (ADC5), H31L02A-PBD (ADC6), or H11L02A-PBD (ADC7).
- ADC1 H01L02-PBD
- ADC5 H01L02A-PBD
- ADC6 H31L02A-PBD
- ADC7 H11L02A-PBD
- the CDH6-positive human ovarian tumor cell line OV-90 was evaluated using an animal model in which immunodeficient mice were transplanted.
- the horizontal axis represents the number of days
- the vertical axis represents the tumor volume
- the error range represents the SE value.
- FIG. 14 shows the in vivo antitumor effect of H01L02A-PBD (ADC5), H31L02A-PBD (ADC6) or anti-LPS antibody-PBD (ADC11).
- the evaluation was performed using an animal model in which the CDH6-positive human ovarian tumor cell line PA-1 was transplanted into immunodeficient mice.
- the horizontal axis represents the number of days, the vertical axis represents the tumor volume, and the error range represents the SE value.
- FIG. 15 shows the in vivo antitumor effect of H01L02A-PBD (ADC5), H31L02A-PBD (ADC6), or anti-LPS antibody-PBD (ADC11).
- Evaluation was carried out using an animal model in which the CDH6-positive human renal cell tumor cell line 786-O was transplanted into immunodeficient mice.
- the horizontal axis represents the number of days
- the vertical axis represents the tumor volume
- the error range represents the SE value.
- cancer In the present specification, “cancer”, “cancer” and “tumor” are used interchangeably.
- the term "gene” includes not only DNA but also mRNA, cDNA and cRNA thereof.
- polynucleotide or “nucleotide” is used in the same meaning as nucleic acid, and also includes DNA, RNA, probe, oligonucleotide, and primer.
- polynucleotide and “nucleotide” can be used interchangeably unless otherwise specified.
- polypeptide and “protein” can be used interchangeably.
- cell also includes cells within animal individuals and cultured cells.
- CDH6 may be used interchangeably with the CDH6 protein.
- human CDH6 may be referred to as “hCDH6”.
- cytotoxic activity refers to causing pathological changes in cells in some form, and is not limited to direct trauma, but includes DNA cleavage, base dimer formation, and chromosome Causes damage to the structure and function of all cells, including cleavage of cells, damage to cell division machinery, and reduction of various enzyme activities.
- to exert toxicity in cells means to exhibit toxicity in cells in some form, and is not limited to direct trauma, but also DNA cleavage and formation of a base dimer. , Chromosome breakage, damage to cell division machinery, reduction of various enzyme activities, suppression of the action of cell growth factors, etc. is meant to affect all cell structures, functions and metabolism.
- the “functional fragment of antibody” is also called “antigen-binding fragment of antibody” and means a partial fragment of antibody having an antigen-binding activity, such as Fab, F (ab ′) 2 , Fv, scFv, diabody, linear antibodies, and multispecific antibodies formed from antibody fragments.
- Fab ' which is a monovalent fragment of the variable region of an antibody obtained by treating F (ab') 2 under reducing conditions, is also included in the antigen-binding fragment of the antibody.
- the molecule is not limited to these as long as it has the ability to bind to the antigen.
- these antigen-binding fragments include not only those obtained by treating the full-length molecule of the antibody protein with an appropriate enzyme, but also the protein produced in an appropriate host cell using the genetically engineered antibody gene. Be done.
- the functional fragment of the present invention retains asparagine (Asn297 or N297) and amino acids in the vicinity thereof that are modified by a well-conserved N-linked sugar chain in the Fc region of IgG heavy chain, and has the ability to bind to an antigen. Includes a functional fragment that it has.
- the “epitope” means a specific partial peptide or partial three-dimensional structure of CDH6 to which an anti-CDH6 antibody binds.
- the epitope which is a partial peptide of CDH6 can be determined by a method well known to those skilled in the art such as immunoassay. First, various substructures of the antigen are prepared. A known oligonucleotide synthesis technique can be used for producing the partial structure.
- a series of polypeptides which are sequentially shortened from the C-terminal or N-terminal of CDH6 with an appropriate length, are produced by using a gene recombination technique well known to those skilled in the art, and then the reactivity of the antibody against them is examined to roughly After determining the recognition site, epitopes can be determined by synthesizing shorter peptides and examining their reactivity with those peptides.
- an antibody that binds to a membrane protein consisting of multiple extracellular domains has a three-dimensional structure consisting of multiple domains as an epitope, it modifies the three-dimensional structure by modifying the amino acid sequence of a specific extracellular domain. Which domain to bind to can be determined.
- An epitope that is a partial three-dimensional structure of an antigen to which a specific antibody binds can also be determined by identifying the amino acid residues of the antigen adjacent to the antibody by X-ray structural analysis.
- binding to the same epitope means an antibody that binds to a common epitope. If the second antibody binds to the partial peptide or partial three-dimensional structure to which the first antibody binds, it can be determined that the first antibody and the second antibody bind to the same epitope. Alternatively, by confirming that the second antibody competes with the binding of the first antibody to the antigen (ie, the second antibody prevents the binding of the first antibody and the antigen), the sequence of the specific epitope Alternatively, even if the structure is not determined, it can be determined that the first antibody and the second antibody bind to the same epitope.
- binding to the same epitope means that the first antibody and the second antibody are determined to bind to a common epitope by one or both of the determination methods. .. If the first antibody and the second antibody bind to the same epitope and the first antibody has a special effect such as antitumor activity or internalization activity, the second antibody also has the same activity. Can be expected.
- CDR means a complementarity determining region (CDR; Complementarity Determining Region). It is known that the heavy and light chains of an antibody molecule each have three CDRs. The CDR is also called a hypervariable region, and is a site in the variable region of the heavy chain and light chain of an antibody where the primary structure variability is particularly high. In the primary structure, each is separated into three places.
- CDRH1, CDRH2, CDRH3 from the amino terminus of the heavy chain amino acid sequence
- CDRL1 from the amino terminus of the light chain amino acid sequence. , CDRL2, and CDRL3. These sites are conformationally close to each other and determine their specificity for binding antigen.
- hybridize under stringent conditions means to hybridize at 68 ° C. in a commercially available hybridization solution ExpressHyb Hybridization Solution (Clontech), or to use a DNA-immobilized filter. After hybridization at 68 ° C. in the presence of 0.7-1.0 M NaCl, 0.1- to 2-fold concentration of SSC solution (1-fold concentration of SSC consists of 150 mM NaCl and 15 mM sodium citrate) is used. Hybridizing under the conditions that can be identified by washing at 68 ° C. or conditions equivalent thereto.
- 1 to several means 1 to 10, 1 to 9, 1 to 8, 1 to 7, 1 to 6, 1 to 5, 1 to 4, 1 Means 3 or 1 or 2.
- CDH6 Cadherin is a glycoprotein that exists on the surface of cell membranes, and functions as an intercellular adhesion molecule and a signal molecule responsible for intercellular interaction by binding N-terminal extracellular domains to each other in a calcium ion-dependent manner.
- cadherin superfamily a group of molecules classified as classic cadherin is a single-transmembrane protein composed of five extracellular domains (EC domains) and one transmembrane region extracellularly, and an intracellular domain. Is.
- CDH6 (Cadherin-6) is a single-transmembrane protein consisting of 790 amino acids classified into the type II cadherin family, and has an N-terminal side extracellularly and a C-terminal side intracellularly.
- the human CDH6 gene was first cloned in 1995 (Non-patent document 1), and can be referred to by accession numbers such as NM_004932 and NP_004923 (NCBI).
- the CDH6 protein used in the present invention may be directly purified from CDH6-expressing cells of human or non-human mammal (rat, mouse, monkey, etc.), or used by preparing a cell membrane fraction of the cells. Alternatively, it can be obtained by synthesizing CDH6 in vitro, or by producing it in a host cell by genetic engineering. In genetic engineering, specifically, the CDH6 cDNA is inserted into an expressible vector and then synthesized in a solution containing enzymes, substrates and energetic substances required for transcription and translation, or other prokaryotic or eukaryotic cells. The protein can be obtained by expressing CDH6 by transforming the host cell of the organism.
- CDH6-expressing cell obtained by the above-mentioned genetic manipulation or a cell line expressing CDH6 as the CDH6 protein.
- an expression vector incorporating CDH6 cDNA may be directly administered to an immunized animal to express CDH6 in the body of the immunized animal.
- CDH6 includes a protein consisting of an amino acid sequence in which one or several amino acids are substituted, deleted and / or added in the amino acid sequence of CDH6 described above and having a biological activity equivalent to that of the protein.
- Human CDH6 protein has the amino acid sequence set forth in SEQ ID NO: 1.
- the extracellular region of the human CDH6 protein has an extracellular domain 1 (also referred to as EC1 in the present specification) having the amino acid sequence of amino acids 54 to 159 of the amino acid sequence of SEQ ID NO: 1, the amino acid sequence of SEQ ID NO: 1.
- Extracellular domain 2 having the amino acid sequence of 160 to 268 (also referred to as EC2 in the present specification), extracellular domain 3 having the amino acid sequence of 269 to 383 of the amino acid sequence of SEQ ID NO: 1 (the present In the specification, also referred to as EC3), extracellular domain 4 having the amino acid sequence of 384 to 486th amino acid sequence of SEQ ID NO: 1 (also referred to as EC4 in the present specification), and described in SEQ ID NO: 1. It is composed of extracellular domain 5 (also referred to as EC5 in the present specification) having the amino acid sequence of the 487th to 608th amino acid sequence of SEQ.
- the amino acid sequences of EC1 to EC5 are designated as SEQ ID NOs: 2 to 6 (Table 1).
- an anti-CDH6 antibody that recognizes an amino acid sequence including the amino acid sequence shown in SEQ ID NO: 4 and has internalization activity can be mentioned.
- An example of the anti-CDH6 antibody of the present invention is an anti-CDH6 antibody that specifically recognizes an amino acid sequence including the amino acid sequence shown in SEQ ID NO: 4 and has internalization activity.
- An example of the anti-CDH6 antibody of the present invention is an anti-CDH6 antibody that recognizes an amino acid sequence consisting of the amino acid sequence shown in SEQ ID NO: 4 and has internalization activity.
- an example of the anti-CDH6 antibody of the present invention is an anti-CDH6 antibody that specifically recognizes the amino acid sequence consisting of the amino acid sequence shown in SEQ ID NO: 4 and has internalization activity.
- the antibody “specifically recognizes an amino acid sequence including the amino acid sequence shown in SEQ ID NO: 4" or "specifically recognizes an EC3 domain” means that the antibody changes the EC3 domain of CDH6 from other extracellular domains of CDH6. It means strongly recognizing or binding strongly by comparison.
- the anti-CDH6 antibody of the present invention may be derived from any species, but preferably human, monkey, rat, mouse or rabbit can be exemplified. When derived from a species other than human, it is preferably chimerized or humanized using well-known techniques.
- the antibody of the present invention may be a polyclonal antibody or a monoclonal antibody, but a monoclonal antibody is preferable.
- the anti-CDH6 antibody of the present invention is an antibody capable of targeting tumor cells, that is, having the property of recognizing tumor cells, the property of being able to bind to tumor cells, and / or the property of being internalized by being taken into tumor cells. There is. Therefore, the anti-CDH6 antibody of the present invention and the compound having antitumor activity can be bound via a linker to form an antibody-drug conjugate.
- the binding of the antibody to tumor cells can be confirmed using flow cytometry.
- the uptake of the antibody into the tumor cells is (1) an assay (Cell Death and Differentiation, 2008, which visualizes the uptake of the antibody into the cells with a fluorescence microscope using a secondary antibody (fluorescent label) that binds to the therapeutic antibody). 15, 751-761), and (2) an assay (Molecular Biology of the Cell Vol. 15, 5268-5282) that measures the amount of fluorescence incorporated into cells using a secondary antibody (fluorescent label) that binds to a therapeutic antibody.
- a Mab-ZAP assay (BioTechniques 28: 162-165) in which an immunotoxin that binds to a therapeutic antibody is used to release a toxin and suppress cell growth when incorporated into cells. It can be confirmed using January 2000).
- an immunotoxin a recombinant complex protein of the catalytic region of diphteteria toxin and protein G can also be used.
- high internalization ability means the survival rate of CDH6-expressing cells administered with the antibody and the saporin-labeled anti-rat IgG antibody (relative rate based on 100% cell survival rate when no antibody is added). Is preferably 70% or less, more preferably 60% or less.
- the antibody-drug conjugate is bound to a compound that exerts an antitumor effect, it is preferable, but not essential, that the antibody itself has an antitumor effect.
- the antibody For the purpose of specifically and / or selectively exerting the cytotoxicity of the antitumor compound in tumor cells, it is important and preferable that the antibody has the property of internalizing and translocating into the tumor cells.
- the anti-CDH6 antibody can be obtained by immunizing an animal with a polypeptide serving as an antigen and collecting and purifying an antibody produced in vivo using a method usually practiced in this field, but preferably It is preferable to use CDH6 having a three-dimensional structure as an antigen. As such a method, a DNA immunization method can be mentioned.
- the origin of the antigen is not limited to humans, and animals can be immunized with antigens derived from non-human animals such as mice and rats.
- the antibodies applicable to human diseases can be selected by testing the cross-reactivity between the obtained antibody that binds to the heterologous antigen and the human antigen.
- a monoclonal antibody can also be obtained by establishing a hybridoma by fusing an antibody-producing cell that produces an antibody against myeloma cell.
- An antigen can be obtained by causing a host cell to produce a gene encoding an antigen protein by genetic engineering. Specifically, a vector capable of expressing the antigen gene may be prepared, introduced into a host cell to express the gene, and the expressed antigen may be purified. Antibodies can also be obtained by using the above-mentioned method of immunizing an animal with antigen-expressing cells by genetic manipulation or a cell line expressing an antigen.
- the cDNA of the antigen protein is incorporated into an expression vector and administered to an immunized animal, the antigen protein is expressed in the body of the immunized animal, and an antibody against the antigen protein is produced to produce an antibody. Can be obtained.
- the anti-CDH6 antibody used in the present invention is not particularly limited, but for example, an antibody specified by the amino acid sequence shown in the sequence listing of the present application is preferably used. it can.
- the anti-CDH6 antibody used in the present invention preferably has the following properties. (1) An antibody having the following characteristics; (A) specifically binds to CDH6, (B) has an activity of being internalized in a CDH6-expressing cell by binding to CDH6, (2) The antibody or the antibody according to (1) above, wherein CDH6 is human CDH6, (3) It specifically recognizes EC3 of human CDH6 and has an internalizing activity.
- the method for obtaining an antibody against CDH6 of the present invention is not particularly limited as long as an anti-CDH6 antibody can be obtained, but it is preferable to use CDH6 having a higher-order structure as an antigen.
- the DNA immunization method is a method for inducing immunity to an antigen by introducing an antigen expression plasmid into an animal individual such as mouse or rat and expressing the antigen in the individual.
- Gene transfer methods include direct plasmid injection into muscle, intravenous injection of liposomes, polyethyleneimine, and other transfer reagents, viral vector methods, and plasmid-attached gold particles with Gene Gun. There are methods such as the Hydrodynamic method in which a large amount of plasmid solution is rapidly injected intravenously.
- hybridomas can be produced by a known method, for example, by using Hybrimune Hybridoma Production System (Cyto Pulse Sciences).
- CDH6 cDNA is incorporated into an expression vector (eg pcDNA3.1: Thermo Fisher Scientific), and the vector is directly administered to an immunized animal (eg rat or mouse) by a method such as electroporation or gene gun. By doing so, an immune response can be induced by expressing CDH6 in the animal body.
- an expression vector eg pcDNA3.1: Thermo Fisher Scientific
- Administration of the vector by electroporation or the like may be performed once or multiple times, preferably multiple times, if necessary to increase the antibody titer;
- a tissue eg, lymph node
- a tissue eg, lymph node
- C Preparation of myeloma cells (hereinafter referred to as "myeloma") (eg mouse myeloma SP2 / 0-ag14 cells);
- D Cell fusion between antibody-producing cells and myeloma;
- E Selection of hybridoma group producing the desired antibody;
- F division into single cell clones (cloning);
- G In some cases, culturing the hybridoma for producing a large amount of the monoclonal antibody, or raising an animal transplanted with the hybridoma; and / or (h) physiological activity (internalization of the monoclonal antibody thus produced) Activity) and its binding specificity, or as
- Examples of the antibody titer measuring method used here include, but are not limited to, flow cytometry and Cell-ELISA.
- hybridoma strain thus established is anti-CDH6 antibody-producing hybridoma rG019.
- the antibody produced by the anti-CDH6 antibody-producing hybridoma rG019 is referred to as “rG019 antibody” or simply “rG019”.
- the light chain variable region of the rG019 antibody consists of the amino acid sequence shown in SEQ ID NO: 10.
- the amino acid sequence of the light chain variable region of the rG019 antibody is encoded by the nucleotide sequence shown in SEQ ID NO: 11.
- the light chain variable region of the rG019 antibody has CDRL1 consisting of the amino acid sequence represented by SEQ ID NO: 12, CDRL2 consisting of the amino acid sequence represented by SEQ ID NO: 13, and CDRL3 consisting of the amino acid sequence represented by SEQ ID NO: 14.
- the heavy chain variable region of the rG019 antibody consists of the amino acid sequence shown in SEQ ID NO: 15.
- the amino acid sequence of the heavy chain variable region of the rG019 antibody is encoded by the nucleotide sequence shown in SEQ ID NO: 16.
- the heavy chain variable region of the rG019 antibody has CDRH1 consisting of the amino acid sequence represented by SEQ ID NO: 17, CDRH2 consisting of the amino acid sequence represented by SEQ ID NO: 18 and CDRH3 consisting of the amino acid sequence represented by SEQ ID NO: 19.
- the sequence or structure of a specific epitope is determined. Even if not determined, it can be determined that the monoclonal antibody binds to the same epitope as the anti-CDH6 antibody. When it is confirmed that the epitopes are the same, it is strongly expected that the monoclonal antibody has the same antigen-binding ability, biological activity and / or internalization activity as the rG019 antibody.
- the antibody of the present invention includes a recombinant antibody that is artificially modified for the purpose of reducing xenoantigenicity against humans, for example, a chimeric (Chimeric) antibody.
- Antibody, humanized antibody, human antibody and the like can be produced using known methods.
- chimeric antibody examples include an antibody in which the variable region and the constant region of the antibody are different from each other, for example, a chimeric antibody in which the variable region of a mouse or rat-derived antibody is joined to a human-derived constant region (Proc. Natl. Acad. Sci. USA, 81, 6851-6855, (1984)).
- Examples of the rat anti-human CDH6 antibody-derived chimeric antibody include, for example, a light chain variable region of the rat anti-human CDH6 antibody (for example, rG019 antibody) described herein and a human-derived constant region, and , An antibody comprising a heavy chain variable region of the rat anti-human CDH6 antibody and a heavy chain containing a human-derived constant region.
- the chimeric antibody derived from the rat anti-human CDH6 antibody for example, 1 to several residues in the light chain variable region of the rat anti-human CDH6 antibody (eg, rG019 antibody) described herein, 1 to A light chain comprising a light chain variable region wherein 3 residues, 1 to 2 residues, preferably 1 residue of amino acid is replaced with another amino acid residue, and the heavy chain variable region of said rat anti-human CDH6 antibody
- the antibody include a heavy chain containing a heavy chain variable region in which one to several residues, one to three residues, one to two residues, preferably one amino acid is replaced with another amino acid residue.
- the antibody may have any human-derived constant region.
- any one to three CDRs in the light chain variable region of the rat anti-human CDH6 antibody (for example, rG019 antibody) described in the present specification can be used.
- Light chain including a light chain variable region in which 1 to 2 residues, preferably 1 residue of amino acid is replaced with another amino acid residue and any one of the heavy chain variable regions of the rat anti-human CDH6 antibody
- the antibody include a heavy chain containing a heavy chain variable region in which 1 to 2 residues in 1 to 3 CDRs, preferably 1 residue of amino acid is replaced with another amino acid residue. It may have a human-derived constant region.
- Examples of the chimeric antibody derived from the rG019 antibody include, for example, a light chain containing a light chain variable region consisting of the amino acid sequence represented by SEQ ID NO: 10 and a heavy chain containing a heavy chain variable region consisting of the amino acid sequence represented by SEQ ID NO: 15. And the antibody may have any human-derived constant region.
- Another example of the chimeric antibody derived from the rG019 antibody is, for example, 1 to several residues, 1 to 3 residues, and 1 to 2 residues in the light chain variable region consisting of the amino acid sequence shown by SEQ ID NO: 10, preferably Is a light chain containing a light chain variable region in which one amino acid residue is replaced with another amino acid residue, and 1 to several residues in the heavy chain variable region consisting of the amino acid sequence shown in SEQ ID NO: 15
- Examples include an antibody consisting of a heavy chain containing a heavy chain variable region in which an amino acid of 3 residues, 1 to 2 residues, preferably 1 residue is replaced with another amino acid residue, and the antibody is a constant constant derived from any human. It may have a region.
- chimeric antibody derived from the rG019 antibody is, for example, 1 or 2 residues (preferably 1) in any 1 to 3 CDRs in the light chain variable region consisting of the amino acid sequence shown in SEQ ID NO: 10.
- 1 or 2 residues (preferably 1 residue) of the amino acid is replaced with another amino acid residue of a heavy chain including a heavy chain variable region, and the antibody includes a constant region derived from any human. You may have.
- Another example of the chimeric antibody derived from the rG019 antibody is, for example, a light chain containing a light chain variable region consisting of the amino acid sequence represented by SEQ ID NO: 10, and a heavy chain variable region consisting of the amino acid sequence represented by SEQ ID NO: 28. And an antibody consisting of a heavy chain containing any of the above.
- the antibody may have any human-derived constant region.
- the amino acid sequence represented by SEQ ID NO: 28 is a sequence in which the cysteine residue in CDRH2 in the amino acid sequence represented by SEQ ID NO: 15 is replaced with a proline residue.
- chimeric antibody derived from the rG019 antibody examples include an antibody consisting of a light chain consisting of the light chain full-length amino acid sequence shown in SEQ ID NO: 23 and a heavy chain consisting of the heavy chain full-length amino acid sequence shown in SEQ ID NO: 26.
- the chimeric anti-human CDH6 antibody is referred to as “chimeric G019 antibody”, “chG019 antibody” or “chG019” in the present specification.
- the light chain full length amino acid sequence of the chG019 antibody is encoded by the nucleotide sequence shown in SEQ ID NO: 24, and the heavy chain full length amino acid sequence of the chG019 antibody is encoded by the nucleotide sequence shown in SEQ ID NO: 27.
- the amino acid sequence of the light chain variable region of the chG019 antibody is the same as the amino acid sequence of the light chain variable region of the rG019 antibody, and consists of the amino acid sequence shown in SEQ ID NO: 10.
- the light chain of the chG019 antibody has CDRL1 consisting of the amino acid sequence represented by SEQ ID NO: 12, CDRL2 consisting of the amino acid sequence represented by SEQ ID NO: 13, and CDRL3 consisting of the amino acid sequence represented by SEQ ID NO: 14, each of rG019 It is identical to the light chain CDRL1, CDRL2 and CDRL3.
- the light chain variable region amino acids of the chG019 antibody are encoded by the nucleotide sequence shown in SEQ ID NO: 25.
- the heavy chain variable region amino acid sequence of the chG019 antibody consists of the amino acid sequence shown in SEQ ID NO: 28.
- the heavy chain of the chG019 antibody has CDRH1 consisting of the amino acid sequence represented by SEQ ID NO: 17, CDRH2 consisting of the amino acid sequence represented by SEQ ID NO: 30 and CDRH3 consisting of the amino acid sequence represented by SEQ ID NO: 19.
- the amino acid sequence represented by SEQ ID NO: 28 is a sequence in which the cysteine residue in CDRH2 in the amino acid sequence represented by SEQ ID NO: 15 is replaced with a proline residue.
- CDRH2 consisting of the amino acid sequence shown in SEQ ID NO: 30 is a sequence in which the cysteine residue in rG019 CDRH2 shown in SEQ ID NO: 18 is replaced with a proline residue.
- the heavy chain variable region amino acid sequence of the chG019 antibody is encoded by the nucleotide sequence shown in SEQ ID NO: 29.
- a humanized antibody an antibody obtained by incorporating only a complementarity determining region (CDR; Complementarity Determining Region) into a human-derived antibody (see Nature (1986) 321, p. 522-525), and CDR sequence by CDR transplantation method.
- CDR complementarity determining region
- WO90 / 07861 an antibody in which part of the CDR amino acid sequence is modified while maintaining the ability to bind to an antigen Can be mentioned.
- a humanized antibody derived from an rG019 antibody or a chG019 antibody is a humanized antibody that retains all six CDR sequences unique to each of the rG019 antibody and the chG019 antibody and has internalization activity. It may be an antibody, and is not limited to a specific humanized antibody. As long as the humanized antibody has internalization activity, a part of the amino acid sequences of CDRs may be further modified.
- Examples of humanized antibodies of chG019 antibody include (1) a light chain variable region consisting of the amino acid sequence set forth in SEQ ID NO: 33 or 37, (2) at least 95% or more identical to the amino acid sequence of (1) above.
- Amino acid sequence preferably an amino acid sequence having at least 95% sequence identity to the sequence of the framework region other than each CDR sequence
- a light chain comprising the light chain variable region according to any one selected from the group consisting of amino acid sequences in which several amino acids have been deleted, substituted or added, and (4) SEQ ID NOs: 41, 45, 49,
- a heavy chain variable region comprising the amino acid sequence of 55 or 60, (5) an amino acid sequence having at least 95% identity to the amino acid sequence of (4) above (preferably a framework other than each CDR sequence) (Amino acid sequence having at least 95% sequence identity with the sequence of the region), and (6) From the amino acid sequence in which one or several amino acids are deleted, substituted or added in the amino acid sequence of (4) above.
- an antibody in which one of a heavy chain and a light chain is humanized and the other is a light chain or heavy chain of a rat antibody or a chimeric antibody can be used.
- Examples of such an antibody include (1) a light chain variable region consisting of the amino acid sequence set forth in SEQ ID NO: 33 or 37, (2) at least 95% identity to the amino acid sequence of (1) above.
- amino acid sequence having (preferably, an amino acid sequence having at least 95% or more sequence identity to the sequence of the framework region other than each CDR sequence), and (3) one or several in the amino acid sequence of (1) above
- a light chain comprising the light chain variable region according to any one selected from the group consisting of amino acid sequences in which the amino acid of (1) is deleted, substituted or added, and (4) the amino acid sequence of SEQ ID NO: 15 or 28.
- an amino acid sequence having at least 95% identity to the amino acid sequence of (4) above (preferably at least 95 to the sequence of the framework region other than each CDR sequence).
- Other examples include (1) a light chain variable region consisting of the amino acid sequence set forth in SEQ ID NO: 10, (2) an amino acid sequence having at least 95% identity to the amino acid sequence of (1) above (preferably Is an amino acid sequence having a sequence identity of at least 95% with respect to a framework region sequence other than each CDR sequence), and (3) a deletion of one or several amino acids in the amino acid sequence of (1) above.
- a light chain comprising the light chain variable region according to any one selected from the group consisting of substituted or added amino acid sequences, and (4) the amino acid according to SEQ ID NO: 41, 45, 49, 55 or 60
- a heavy chain variable region consisting of a sequence, (5) an amino acid sequence having at least 95% identity to the amino acid sequence of (4) above (preferably at least the sequence of the framework region other than each CDR sequence) An amino acid sequence having 95% or more sequence identity), and (6) an amino acid sequence in which one or several amino acids are deleted, substituted or added in the amino acid sequence of (4) above. Mention may be made of any combination of heavy chains comprising one of the heavy chain variable regions described.
- amino acid substitution is preferable as the amino acid substitution in the present specification.
- Such amino acid substitution is preferably performed within a range that does not deteriorate the properties of the substance having the original amino acid sequence.
- the light chain having the light chain variable region amino acid sequence shown in SEQ ID NO: 33 also referred to herein as hL02 light chain variable region amino acid sequence
- the light chain variable region amino acid sequence shown in SEQ ID NO: 37 hereinbelow
- HL03 light chain variable region amino acid sequence a heavy chain having the heavy chain variable region amino acid sequence set forth in SEQ ID NO: 41 (herein also referred to as hH01 heavy chain variable region amino acid sequence).
- a heavy chain having the heavy chain variable region amino acid sequence shown in SEQ ID NO: 45 (also referred to herein as hH02 heavy chain variable region amino acid sequence), the heavy chain variable region amino acid sequence shown in SEQ ID NO: 49 (herein , HH04 heavy chain variable region amino acid sequence), the heavy chain variable region amino acid sequence set forth in SEQ ID NO: 55 (also referred to herein as hH11 heavy chain variable region amino acid sequence) or the heavy chain set forth in SEQ ID NO: 60
- An antibody consisting of a heavy chain having a variable region amino acid sequence (also referred to herein as hH31 heavy chain variable region amino acid sequence) can be mentioned.
- the hH11 heavy chain variable region amino acid sequence shown in SEQ ID NO: 55 is CDRH1 consisting of the amino acid sequence shown in SEQ ID NO: 57, CDRH2 consisting of the amino acid sequence shown in SEQ ID NO: 58, and CDRH3 consisting of the amino acid sequence shown in SEQ ID NO: 59.
- the hH31 heavy chain variable region amino acid sequence shown in SEQ ID NO: 60 is CDRH1 consisting of the amino acid sequence shown in SEQ ID NO: 62, CDRH2 consisting of the amino acid sequence shown in SEQ ID NO: 63, and CDRH3 consisting of the amino acid sequence shown in SEQ ID NO: 64.
- CDRH1 consisting of the amino acid sequence shown in SEQ ID NO: 57
- CDRH2 consisting of the amino acid sequence shown in SEQ ID NO: 58
- CDRH3 consisting of the amino acid sequence shown in SEQ ID NO: 59.
- Examples of preferred antibodies include An antibody consisting of a light chain having the light chain variable region amino acid sequence set forth in SEQ ID NO: 33 and a heavy chain having the heavy chain variable region amino acid sequence set forth in SEQ ID NO: 41; An antibody consisting of a light chain having the light chain variable region amino acid sequence set forth in SEQ ID NO: 33 and a heavy chain having the heavy chain variable region amino acid sequence set forth in SEQ ID NO: 45; An antibody consisting of a light chain having the light chain variable region amino acid sequence set forth in SEQ ID NO: 33 and a heavy chain having the heavy chain variable region amino acid sequence set forth in SEQ ID NO: 49; An antibody consisting of a light chain having the light chain variable region amino acid sequence set forth in SEQ ID NO: 33 and a heavy chain having the heavy chain variable region amino acid sequence set forth in SEQ ID NO: 55; An antibody consisting of a light chain having the light chain variable region amino acid sequence set forth in SEQ ID NO: 33 and a heavy chain having the heavy chain variable region amino acid sequence set forth in S
- Examples of more preferred antibodies include An antibody consisting of a light chain having the light chain variable region amino acid sequence set forth in SEQ ID NO: 33 and a heavy chain having the heavy chain variable region amino acid sequence set forth in SEQ ID NO: 41; An antibody consisting of a light chain having the light chain variable region amino acid sequence set forth in SEQ ID NO: 33 and a heavy chain having the heavy chain variable region amino acid sequence set forth in SEQ ID NO: 45; An antibody consisting of a light chain having the light chain variable region amino acid sequence set forth in SEQ ID NO: 33 and a heavy chain having the heavy chain variable region amino acid sequence set forth in SEQ ID NO: 49; An antibody comprising a light chain having the light chain variable region amino acid sequence set forth in SEQ ID NO: 37 and a heavy chain having the heavy chain variable region amino acid sequence set forth in SEQ ID NO: 45; An antibody consisting of a light chain having the light chain variable region amino acid sequence shown in SEQ ID NO: 33 and a heavy chain having the heavy chain variable region amino acid sequence shown in SEQ ID
- a light chain consisting of the 21st to 233rd amino acid sequence of the light chain full length amino acid sequence shown in SEQ ID NO: 31 also referred to as hL02 light chain full length amino acid sequence in the present specification
- the light chain full length amino acid sequence shown in SEQ ID NO: 35 A light chain consisting of the 21st to 233rd amino acid sequences of hL03 light chain full length amino acid sequence in the present specification
- a heavy chain consisting of the 20th to 471st amino acid sequences of the heavy chain full length amino acid sequence shown in SEQ ID NO: 39 also referred to herein as hH01 heavy chain full length amino acid sequence
- the heavy chain full length amino acid sequence shown in SEQ ID NO: 43 A heavy chain consisting of the 20th to 471st amino acid sequences of hH02 heavy chain full length amino acid sequence in the present specification, the heavy chain full length amino acid sequence shown in SEQ ID NO: 47 (herein,
- Examples of another preferred antibody include: An antibody comprising a light chain consisting of the 21st to 233rd amino acid sequences of the light chain full length amino acid sequence shown in SEQ ID NO: 31 and a heavy chain consisting of the 20th to 471th amino acid sequences of the heavy chain full length amino acid sequence shown in SEQ ID NO: 39. ; An antibody comprising a light chain consisting of the 21st to 233rd amino acid sequence of the full length light chain amino acid sequence shown in SEQ ID NO: 31 and a heavy chain consisting of the 20th to 471st amino acid sequence of the heavy chain full length amino acid sequence shown in SEQ ID NO: 43.
- An antibody comprising a light chain consisting of the 21st to 233rd amino acid sequence of the full length light chain amino acid sequence shown in SEQ ID NO: 35 and a heavy chain consisting of the 20th to 471st amino acid sequence of the heavy chain full length amino acid sequence shown in SEQ ID NO: 67. Or from the light chain consisting of the 21-233rd amino acid sequence of the light chain full length amino acid sequence shown in SEQ ID NO: 35 and the heavy chain consisting of the 20th to 471th amino acid sequence of the heavy chain full length amino acid sequence shown in SEQ ID NO: 69 Antibody Is mentioned.
- Examples of more preferred antibodies include An antibody comprising a light chain consisting of the 21st to 233rd amino acid sequences of the light chain full length amino acid sequence shown in SEQ ID NO: 31 and a heavy chain consisting of the 20th to 471th amino acid sequences of the heavy chain full length amino acid sequence shown in SEQ ID NO: 39. (In the present specification, also referred to as "H01L02 antibody” or "H01L02"); An antibody comprising a light chain consisting of the 21st to 233rd amino acid sequence of the full length light chain amino acid sequence shown in SEQ ID NO: 31 and a heavy chain consisting of the 20th to 471st amino acid sequence of the heavy chain full length amino acid sequence shown in SEQ ID NO: 43.
- H02L02 antibody (In the present specification, also referred to as "H02L02 antibody” or “H02L02”); An antibody comprising a light chain consisting of the 21st to 233rd amino acid sequence of the full length light chain amino acid sequence shown in SEQ ID NO: 31 and a heavy chain consisting of the 20th to 471st amino acid sequence of the heavy chain full length amino acid sequence shown in SEQ ID NO: 47.
- H04L02 antibody (In the present specification, also referred to as "H04L02 antibody” or “H04L02”); An antibody comprising a light chain consisting of the 21st to 233rd amino acid sequence of the light chain full length amino acid sequence shown in SEQ ID NO: 35 and a heavy chain consisting of the 20th to 471st amino acid sequence of the heavy chain full length amino acid sequence shown in SEQ ID NO: 43.
- H02L03 antibody (In the present specification, also referred to as "H02L03 antibody” or “H02L03”); An antibody comprising a light chain consisting of the 21st to 233rd amino acid sequences of the light chain full length amino acid sequence shown in SEQ ID NO: 31 and a heavy chain consisting of the 20th to 471st amino acid sequences of the heavy chain full length amino acid sequence shown in SEQ ID NO: 65.
- H01L02A antibody (In the present specification, also referred to as "H01L02A antibody” or “H01L02A”);
- An antibody comprising a light chain consisting of the 21st to 233rd amino acid sequence of the full length light chain amino acid sequence shown in SEQ ID NO: 31 and a heavy chain consisting of the 20th to 471st amino acid sequence of the heavy chain full length amino acid sequence shown in SEQ ID NO: 67.
- H11L02A antibody or “H11L02A” in the present specification
- a light chain consisting of amino acid sequences 21 to 233 of the full-length light chain amino acid sequence shown in SEQ ID NO: 31 and a heavy chain shown in SEQ ID NO: 69
- An antibody consisting of a heavy chain consisting of the 20th to 471st amino acid sequence in the entire chain amino acid sequence also referred to herein as "H31L02A antibody” or "H31L02A”
- an antibody having the same biological activity as each of the above antibodies is generally greater than or equal to 80%, preferably greater than or equal to 90%, more preferably greater than or equal to 95%, and most preferably greater than or equal to 99%. Sameness. Also, an antibody having biological activity equivalent to that of each of the above antibodies can be selected by combining an amino acid sequence in which one to several amino acid residues are substituted, deleted or added with the amino acid sequence of heavy chain or light chain. It is possible to
- ClustalW version 2 The identities between the two types of amino acid sequences are ClustalW version 2 (Larkin MA, Blackshields G, Brown NP, Chenen R, McGettigan PA, McWillam H, Valentin F, W Williams, L, NP). It can be determined by aligning the sequences using the default parameters of Higgins DG (2007), “Clustal W and Clustal X version 2.0”, Bioinformatics.23 (21): 2947-2948).
- the amino acid sequence consisting of amino acid residues 1 to 20 is a signal sequence
- the amino acid sequence consisting of amino acid residues 21 to 128 is a variable region.
- the amino acid sequence consisting of amino acid residues 129 to 233 is a constant region.
- amino acid sequence consisting of amino acid residues 1 to 20 is a signal sequence
- amino acid sequence consisting of amino acid residues 21 to 128 is a variable region
- amino acid sequence consisting of amino acid residues 129 to 233 is a constant region.
- the amino acid sequence consisting of the 1-19th amino acid residues is a signal sequence
- the amino acid sequence consisting of the 20-141st amino acid residues is a variable region
- the amino acid sequence consisting of amino acid residues 142 to 471 is a constant region.
- amino acid sequence consisting of amino acid residues 1 to 19 is a signal sequence
- amino acid sequence consisting of amino acid residues 20 to 141 is a variable region
- amino acid sequence consisting of amino acid residues 142 to 471 is a constant region.
- amino acid sequence consisting of amino acid residues 1 to 19 is a signal sequence
- amino acid sequence consisting of amino acid residues 20 to 141 is a variable region
- amino acid sequence consisting of amino acid residues 142 to 471 is a constant region.
- the amino acid sequence consisting of the 1st to 19th amino acid residues is a signal sequence
- the amino acid sequence consisting of the 20th to 141st amino acid residues is a variable region
- the amino acid sequence consisting of amino acid residues 142 to 471 is a constant region.
- the amino acid sequence consisting of the 1st to 19th amino acid residues is a signal sequence
- the amino acid sequence consisting of the 20th to 141st amino acid residues is a variable region
- the amino acid sequence consisting of amino acid residues 142 to 471 is a constant region.
- the amino acid sequence consisting of the 1st to 19th amino acid residues is a signal sequence
- the amino acid sequence consisting of the 20th to 141st amino acid residues is a variable region
- the amino acid sequence consisting of amino acid residues 142 to 471 is a constant region.
- the antibody of the present invention may further include a human antibody that binds to CDH6.
- the anti-CDH6 human antibody means a human antibody having only the gene sequence of an antibody derived from human chromosome.
- As the anti-CDH6 human antibody a method using a human antibody-producing mouse having a human chromosomal fragment containing genes for the heavy chain and the light chain of the human antibody (Tomizuka, K. et al., Nature Genetics (1997) 16, p. 133) is used. Kuroiwa, Y. et. Al., Nucl. Acids Res. (1998) 26, p. 3447-3448; Yoshida, H. et.
- a human immunoglobulin is mediated by a yeast artificial chromosome (Yeast artificial chromosome, YAC) vector or the like.
- yeast artificial chromosome Yeast artificial chromosome, YAC
- knockout animals and transgenic animals can be produced and these animals can be crossed with each other.
- eukaryotic cells are transformed with cDNAs encoding each of the heavy chain and light chain of such human antibody, preferably a vector containing the cDNA, to produce a gene recombinant human monoclonal antibody.
- This antibody can also be obtained from the culture supernatant by culturing the transformed cells.
- eukaryotic cells preferably CHO cells
- mammalian cells such as lymphocytes and myeloma cells
- lymphocytes preferably lymphocytes
- myeloma cells can be used as the host.
- a method for obtaining human antibodies derived from phage display selected from a human antibody library (Wormstone, IM et al, Investigative Ophthalmology & Visual Science. (2002) 43 (7), p. 2301-2308; Mé, S. et. Al., Briefings in Functional Genomics and Proteomics (2002), 1 (2), p. 189-203; Siriwardena, D. et. Al., Ophthalmology (2002) 109 (3), p. 427-431 etc.) is also known.
- a phage display method (Nature Biotechnology (2005), 23, (9), p. 1105) in which the variable region of a human antibody is expressed as a single chain antibody (scFv) on the phage surface to select phage that bind to an antigen. -1116) can be used.
- scFv single chain antibody
- the DNA sequence encoding the variable region of the human antibody that binds to the antigen can be determined.
- a human antibody can be obtained by preparing an expression vector having the sequence and introducing it into a suitable host for expression (WO92 / 01047). No. 92/20791, No. 93/06213, No. 93/11236, No. 93/19172, No. 95/01438, No. 95/15388, Annu. Rev. Immunol (1994) 12, p. 433-455, Nature Biotechnology (2005) 23 (9), p. 1105-1116).
- the newly produced human antibody is the rat anti-human CDH6 antibody, chimeric anti-human CDH6 antibody or humanized anti-human CDH6 antibody described in the present specification (for example, rG019 antibody, chG019 antibody, H01L02 antibody, H02L02 antibody, H02L03 antibody). , H04L02 antibody, H01L02A antibody, H11L02A antibody or H31L02A antibody), the human antibody binds to the rat anti-human CDH6 antibody, chimeric anti-human CDH6 antibody or humanized antibody. It can be determined that it binds to the same epitope as the anti-human CDH6 antibody.
- a rat anti-human CDH6 antibody, a chimeric anti-human CDH6 antibody or a humanized anti-human CDH6 antibody described in the present specification for example, rG019 antibody, chG019 antibody, H01L02 antibody, H02L02 antibody, H02L03 antibody, H04L02 antibody, H01L02A antibody
- the human antibody competes for binding of CDH6 of H11L02A antibody or H31L02A antibody) (for example, the human antibody is rG019 antibody, chG019 antibody, H01L02 antibody, H02L02 antibody, H02L03 antibody, H04L02 antibody, H01L02A antibody, H11L02A antibody).
- the H31L02A antibody prevents the binding of CDH6, preferably CDH6 to EC3), even if the sequence or structure of the specific epitope has not been determined. It can be determined that it binds to the same epitope as the rat anti-human CDH6 antibody, chimeric anti-human CDH6 antibody or humanized anti-human CDH6 antibody described. In the present specification, when it is determined to “bind to the same epitope” by at least one of the determination methods, the newly prepared human antibody is the rat anti-human CDH6 antibody described in the present specification. It can be said that it "binds to the same epitope" as the chimeric anti-human CDH6 antibody or the humanized anti-human CDH6 antibody.
- the human antibody is a rat anti-human CDH6 antibody, a chimeric anti-human CDH6 antibody or a humanized anti-human CDH6 antibody (for example, rG019 antibody, chG019 antibody, H01L02 antibody, H02L02 antibody, H02L03).
- Antibody, H04L02 antibody, H01L02A antibody, H11L02A antibody or H31L02A antibody) is expected to have the same biological activity.
- the chimeric antibody, humanized antibody, or human antibody obtained by the above method can be evaluated for binding to an antigen by a known method or the like, and a suitable antibody can be selected.
- the stability of antibodies can be cited as an example of another index when comparing the properties of antibodies.
- Differential scanning calorimetry is a device that can quickly and accurately measure the thermal denaturation midpoint (Tm), which is an indicator of the relative structural stability of proteins. The difference in thermal stability can be compared by measuring the Tm value using DSC and comparing the values.
- Tm thermal denaturation midpoint
- the storage stability of an antibody is known to show a certain degree of correlation with the thermal stability of the antibody (Lori Burton, et. Al., Pharmaceutical Development and Technology (2007) 12, p. 265-273), and heat stability.
- a suitable antibody can be selected based on the stability as an index.
- Other indicators for selecting antibodies include high yield in appropriate host cells and low aggregation in aqueous solution. For example, the antibody with the highest yield does not always exhibit the highest thermostability, so it is necessary to make a comprehensive judgment based on the above-mentioned indicators and select the antibody most suitable for human administration. ..
- the antibody of the present invention also includes modified antibodies.
- the modified product means a product obtained by chemically or biologically modifying the antibody of the present invention.
- Chemical modifications include chemical attachments of chemical moieties to the amino acid backbone, chemical modifications of N-linked or O-linked carbohydrate chains, and the like.
- Biological modifications include post-translational modifications (eg, N-linked or O-linked glycosylation, N-terminal or C-terminal processing, deamidation, aspartic acid isomerization, methionine oxidation, Or N-terminal glutamine or N-terminal glutamic acid pyroglutamine-oxidized), and a methionine residue added to the N-terminal by expression using a prokaryotic host cell.
- modified products for example, enzyme labels, fluorescent labels, affinity labels are also included in the meaning of such modified products.
- modified product of the antibody of the present invention is useful for improving antibody stability and blood retention, reducing antigenicity, detecting or isolating antibody or antigen, and the like.
- the antibody of the present invention also includes the antibody whose sugar chain modification is regulated.
- the antibody gene When the antibody gene is once isolated and then introduced into an appropriate host to produce an antibody, a combination of an appropriate host and expression vector can be used.
- Specific examples of the antibody gene include a combination of the gene encoding the heavy chain sequence of the antibody described herein and the gene encoding the light chain sequence.
- the heavy chain sequence gene and the light chain sequence gene When transforming a host cell, the heavy chain sequence gene and the light chain sequence gene can be inserted into the same expression vector, or can be inserted into different expression vectors. is there.
- animal cells When using eukaryotic cells as hosts, animal cells, plant cells, and eukaryotic microorganisms can be used.
- animal cells mammalian cells such as COS cells (Gluzman, Y. Cell (1981) 23, p.175-182, ATCC CRL-1650), mouse fibroblasts NIH3T3 (ATCC No. CRL-1658) and Chinese hamster ovary cells (CHO cells, ATCC CCL-61) deficient in dihydrofolate reductase (Urlaub, G. and Chasin, LA Proc. Natl. Acad. Sci. U.S. A. (1980) 77, p. 4126-4220) and FreeStyle 293F cells (Invitrogen).
- COS cells Gluzman, Y. Cell (1981) 23, p.175-182, ATCC CRL-1650
- mouse fibroblasts NIH3T3 ATCC No. CRL-1658
- Chinese hamster ovary cells CHO cells, AT
- examples include Escherichia coli and Bacillus subtilis.
- the antibody of the present invention comprises a step of culturing the transformed host cell, and a step of collecting the antibody of interest or a functional fragment of the antibody from the culture obtained in the step.
- the antibody obtained by the method for producing the antibody is also included.
- the antibody according to the present invention also includes the modified antibody and a functional fragment of the antibody, and has a deletion product in which one or two amino acids are deleted at the carboxyl end of the heavy chain, and an amidated product.
- the deletion product for example, a heavy chain in which a proline residue at the carboxyl terminal site is amidated
- the deletion product of the carboxyl terminus of the heavy chain of the antibody of the present invention is not limited to the above types.
- the two heavy chains constituting the antibody according to the present invention may be any one of the heavy chains selected from the group consisting of full-length and the above-mentioned deletions, or a combination of any two of them.
- the quantitative ratio of each deletion may be influenced by the type of cultured mammalian cells producing the antibody of the present invention and the culture conditions, the main component of the antibody of the present invention is that both heavy chains have carboxyl groups.
- An example is a case where one terminal amino acid residue is deleted.
- Examples of the isotype of the antibody of the present invention include IgG (IgG1, IgG2, IgG3, IgG4) and the like, with preference given to IgG1, IgG2 or IgG4.
- IgG1 When IgG1 is used as the isotype of the antibody of the present invention, the effector function can be adjusted by substituting a part of amino acid residues in the constant region.
- IgG1 variants with reduced or attenuated effector functions include IgG1 LALA (IgG1-L234A, L235A) and IgG1 LAGA (IgG1-L235A, G237A) (Journal of Virology, Vol. 75, No. 24). (Dec. 15, 2001), pp. 12161-12168), preferably IgG1 LALA.
- the L234A and L235A are identified by EU index (Proc. Natl. Acad. Sci. USA, Vol. 63, No. 1 (May 15, 1969), pp. 78-85).
- substitution of leucine with alanine G237A indicates substitution of glycine at position 237 with alanine specified by EU index.
- the antigen-binding activity As the biological activity of the antibody, generally, the antigen-binding activity, the activity of internalizing in the cells expressing the antigen by binding to the antigen, the activity of neutralizing the activity of the antigen, the activity of enhancing the activity of the antigen,
- the antibody-dependent cell cytotoxicity (ADCC) activity, the complement-dependent cell cytotoxicity (CDC) activity, and the antibody-dependent cell-mediated phagocytosis (ADCP) can be mentioned.
- the function of the antibody according to the present invention is to CDH6. It is a binding activity, preferably an activity of being internalized in a CDH6-expressing cell by binding to CDH6.
- the antibody of the present invention may have ADCC activity, CDC activity and / or ADCP activity in addition to the cell internalization activity.
- the obtained antibody can be purified to homogeneity. Separation and purification of the antibody may be carried out by using the separation and purification methods used for ordinary proteins. For example, by appropriately selecting and combining column chromatography, filter filtration, ultrafiltration, salting out, dialysis, preparative polyacrylamide gel electrophoresis, isoelectric focusing, etc., the antibody can be separated and purified (Strategies). for Protein Purification and Characterization: A Laboratory Course Manual, Daniel R.Marshak et al.eds, Cold Spring Harbor Laboratory Press (1996); Antibodies:. A Laboratory Manual.Ed Harlow and David Lane, Cold Spring Harbor Laboratory (1988)) However, it is not limited to these.
- chromatography examples include affinity chromatography, ion exchange chromatography, hydrophobic chromatography, gel filtration chromatography, reverse phase chromatography, adsorption chromatography and the like.
- columns used for affinity chromatography include protein A columns and protein G columns.
- protein A columns As a column using a protein A column, Hyper D, POROS, Sepharose F. F. (Pharmacia) and the like.
- the invention also relates to polynucleotides encoding the antibodies of the invention.
- the polynucleotide of the present invention is preferably a polynucleotide containing the polynucleotide described in any one of the following (a) to (e).
- A a combination of a polynucleotide encoding a heavy chain amino acid sequence and a polynucleotide encoding a light chain amino acid sequence of the CDH6 antibody of the present invention
- B A combination of a polynucleotide encoding a heavy chain amino acid sequence containing CDRH1 to CDRH3 and a polynucleotide encoding a light chain amino acid sequence containing CDRL1 to CDRL3 of any one of the CDH6 antibodies of the present invention
- c book A combination of a polynucleotide encoding a heavy chain amino acid sequence containing the amino acid sequence of the heavy chain variable region of the invention and a polynucleotide encoding a light chain amino acid sequence containing the amino acid sequence of the light chain variable region
- d (a) A polynucleotide which hybridizes with a nucleotide consisting of a polynucleotide complementary to the polynucleot
- the present invention includes a nucleotide encoding the antibody of the present invention or a functional fragment thereof or a modified form thereof, a recombinant vector into which the gene is inserted, and a cell into which the gene or the vector has been introduced.
- the present invention also provides a method for producing an antibody, a functional fragment thereof, or a modified product thereof, which comprises a step of culturing the cell, and a step of recovering an antibody or a functional fragment thereof or a modified product thereof from the culture. Including.
- amino acid sequence or nucleotide sequence of the antibody of the present invention and the amino acid sequence of the protein used in the present invention or the nucleotide sequence of the nucleic acid are shown in Tables 1-1 to 1-14.
- Anti-CDH6 Antibody-Drug Conjugate The antibody drug conjugate of the present invention has the following formula:
- m 2 represents an integer of 1 or 2
- Ab is an IgG antibody or a functional fragment of the antibody, which specifically binds to an amino acid sequence including the amino acid sequence of SEQ ID NO: 4 and has internalization ability to be taken up into cells
- L is a linker that connects D with the sugar chain (N297) that binds to N297 of Ab
- D is the following:
- the anti-CDH6 antibody obtained in the above “2. Production of anti-CDH6 antibody” can be made into an anti-CDH6 antibody-drug conjugate by binding a drug via a linker structure portion.
- the drug is not particularly limited as long as it has a substituent capable of binding to the linker structure and a partial structure.
- the anti-CDH6 antibody-drug conjugate can be used in various applications depending on the drug to be bound. Examples of such drugs include substances having antitumor activity, substances having effects on blood diseases, substances having effects on autoimmune diseases, anti-inflammatory substances, antibacterial substances, antifungal substances, antiparasitic substances, antiparasitic substances Viral substances, anti-anesthetic substances and the like can be mentioned.
- the antitumor compound is not particularly limited as long as it is a compound having an antitumor effect and has a substituent or a partial structure capable of binding to the linker structure.
- a part or all of the linker is cleaved in the tumor cells to release the antitumor compound part, and the antitumor effect is exhibited.
- the linker is cleaved at the drug binding site, the antitumor compound is released in its original structure, and its original antitumor effect is exerted.
- Examples of the free drug include drugs 1 to 4 described in Examples 10-7 to 10-10.
- the anti-CDH6 antibody obtained in “2. Production of anti-CDH6 antibody” above can be made into an anti-CDH6 antibody-drug conjugate by binding an anti-tumor compound through the linker structure.
- antitumor compounds used in the present invention are as follows:
- the PBD derivative of the present invention has an asymmetric carbon at the 11'-position, it has optical isomers. In the present specification, these isomers, and mixtures of these isomers, are all represented by a single formula. Therefore, the above-mentioned PBD derivative of the present invention includes an optical isomer and a mixture of optical isomers at any ratio, respectively.
- the absolute configuration at the 11'-position of the above PBD derivative of the present invention can be determined by X-ray crystal structure analysis of crystalline products or intermediates or their derivatives, or by NMR such as Mosher method.
- the absolute configuration may be determined by using a crystalline product or intermediate derivatized with a reagent having an asymmetric center of known configuration.
- Stereoisomers can be obtained by isolating the synthesized compound of the present invention, if desired, using a conventional optical resolution method or separation method.
- the antibody-drug conjugate of the present invention includes a stereoisomer or an optical isomer derived from an asymmetric carbon atom, a geometric isomer, a tautomer or a d-form, an l-form,
- optical isomers such as atropisomers may exist, any of these isomers, optical isomers, and mixtures thereof are included in the present invention.
- antitumor compounds used in the present invention are as follows:
- B represents a phenyl group or a heteroaryl group, preferably a 1,4-phenyl group, a 2,5-pyridyl group, a 3,6-pyridyl group, a 2,5-pyrimidyl group or a 2,5-thienyl group. And more preferably a 1,4-phenyl group.
- Lp represents a linker consisting of an amino acid sequence cleavable in vivo or in a target cell. Lp is cleaved by the action of enzymes such as esterase and peptidase.
- Lp is a peptide residue composed of 2 to 7 (preferably 2 to 4) amino acids. That is, it is composed of residues of an oligopeptide in which 2 to 7 amino acids are peptide-bonded.
- An enzyme such as esterase cleaves the bond between the C-terminal of Lp and -NH-.
- the amino acid that constitutes Lp is not particularly limited, but is, for example, an L- or D-amino acid, preferably an L-amino acid.
- ⁇ -amino acids it may be an amino acid having a structure such as ⁇ -alanine, ⁇ -aminocaproic acid, ⁇ -aminobutyric acid, and further, a non-natural amino acid such as N-methylated amino acid. It may be.
- the amino acid sequence of Lp is not particularly limited, but the constituent amino acids include glycine (Gly; G), valine (Val; V), alanine (Ala; A), phenylalanine (Phe; F), glutamic acid (Glu; E). , Isoleucine (Ile; I), proline (Pro; P), citrulline (Cit), leucine (Leu; L), serine (Ser; S), lysine (Lys; K) and aspartic acid (Asp; D). Can be mentioned. Of these, glycine (Gly; G), valine (Val; V), alanine (Ala; A), and citrulline (Cit) are preferable. These amino acids may overlap and have an amino acid sequence that includes arbitrarily selected amino acids. In addition, the pattern of drug release can be controlled by the type of amino acid.
- linker Lp As a specific example of the linker Lp, -GGVA-, -GG- (D-) VA-, -VA-, -GGFG-, -GGPI-, -GGVCit-, -GGVK-, -GG (D-) PI-, -GGPL-, -EGGVA, -PI-, -GGF-, DGGF-, (D-) D-GGF-, -EGGF-, -SGGF-, -KGGF-, -DGGFG-, -GGFGG-, -DDGGGF-, -KDGGFG-, -GGGFGGGF - Can be mentioned.
- (D-) V means D-valine
- (D-) P means D-proline
- (D-) D means D-aspartic acid
- the linker Lp is preferably: -GGVA-, -GG- (D-) VA-, -VA-, -GGFG-, -GGPI-, -GGVCit-, -GGVK-, -GG (D-) PI-, -GGPL-
- the linker Lp is more preferably:
- -GGVA-, -GGVCit-, -VA- Lb represents a spacer that binds La to the sugar chain of antibody Ab or a remodeled sugar chain.
- the Lb spacer is not particularly limited, and examples thereof include a spacer represented by the following formula.
- Lb Lb-1, Lb-2 or Lb-3
- the triazole ring moiety formed by the click reaction of the azido group and the cyclooctynyl group has a geometrical isomer structure, and 1
- One Lb exists in one Lb or a mixture thereof.
- One or two molecules of the antibody-drug conjugate of the present invention have 2 or 4 “-LD” (where m 2 is 1 or 2), each of which is included in L in each “-LD”.
- Lb (Lb-1, Lb-2, or Lb-3) is a mixture of either or both of these two types of structures.
- the linker part eg, Lp
- release the drug D part is released (hereinafter, referred to as “release”). It is considered to exert antitumor activity.
- the antibody-drug conjugate of the present invention is preferably stable outside the tumor cells.
- a heterogeneous sugar chain added to a protein such as an antibody
- a protein such as an antibody
- GlcNAc a protein added with GlcNAc.
- acceptor a portion is prepared (hereinafter referred to as "acceptor”).
- donor an arbitrary sugar chain prepared separately is prepared (hereinafter referred to as “donor”), and this acceptor and donor are linked using a glycosyltransferase.
- a uniform glycoprotein having an arbitrary sugar chain structure can be synthesized.
- the “sugar chain” means a structural unit in which two or more monosaccharides are linked by a glycoside bond.
- Specific monosaccharides and sugar chains are sometimes referred to as abbreviations such as "GlcNAc-" and "MSG-”.
- abbreviations such as "GlcNAc-" and "MSG-”.
- an oxygen atom or a nitrogen atom belonging to a glycosidic bond with another structural unit at the reducing end is an abbreviation representing the sugar chain, unless otherwise specified. Displayed as not included.
- a monosaccharide serving as a basic unit of a sugar chain is, unless otherwise specified, conveniently attached to a ring-forming oxygen atom in the ring structure and to a hydroxyl group (or a glycoside bond).
- the carbon atom directly bonded to the (oxygen atom) is represented as 1-position (2-position only in sialic acid).
- the names of the example compounds are given as the whole chemical structure, and this rule is not necessarily applied.
- the sugar chain of Ab in the present invention is an N-linked sugar chain or an O-linked sugar chain, preferably an N-linked sugar chain.
- -N-linked sugar chains are linked to the amino acid side chains of the antibody by N-glycoside bonds and O-linked sugar chains by O-glycoside bonds.
- IgG has a well-conserved N-linked sugar chain at the 297th asparagine residue in the Fc region of its heavy chain (hereinafter referred to as "Asn297 or N297”), and is associated with the activity and dynamics of antibody molecules. It is known to contribute (Biotechnol. Prog., 2012, 28, 608-622, Sanglier-Cianferani, S., Anal. Chem., 2013, 85, 715-736).
- each amino acid has an Eu number (Eu INDEX).
- Eu INDEX Eu INDEX
- Asn297 to which an N-linked sugar chain is added in the Fc region corresponds to position 297 in the Eu number, and even if the actual amino acid position changes due to molecular fragmentation or region deletion, the Eu number
- the amino acid is uniquely specified by displaying.
- the antibody or the functional fragment thereof is linked to L from a sugar chain that binds to the side chain of Asn297 (hereinafter referred to as “N297 sugar chain”),
- N297 sugar chain a sugar chain that binds to the side chain of Asn297
- the antibody or the functional fragment thereof is a sugar chain in which the N297 sugar chain is linked to L, and the N297 sugar chain is remodeled.
- an antibody having the remodeled sugar chain is called a sugar chain remodeling antibody.
- SGP is an abbreviation for Sialyl GlycoPeptide, which is a typical N-linked complex sugar chain.
- SGP can be isolated and purified from the egg yolk of a chicken egg, for example, according to the method described in WO2011 / 0278681. Further, a purified product of SGP is commercially available (Tokyo Kasei Co., Ltd., Fushimi Pharmaceutical Co., Ltd.) and can be purchased. Disialooctasaccharide (Tokyo Kasei Co., Ltd.) and the like, which consist only of a sugar chain in which one GlcNAc at the reducing end is deleted in the sugar chain portion of SG (hereinafter, “SG (10)”), are commercially available.
- MSG (9) a sugar chain structure in which sialic acid at the non-reducing end is deleted in only one of ⁇ -Man branched chains of SG (10) is referred to as MSG (9), which is a branched 1-3 sugar chain.
- MSG1 a sugar chain structure in which sialic acid at the non-reducing end is deleted in only one of ⁇ -Man branched chains of SG (10)
- MSG1 a sugar chain structure in which sialic acid at the non-reducing end is deleted in only one of ⁇ -Man branched chains of SG (10)
- MSG1 a sugar chain structure in which sialic acid at the non-reducing end is deleted in only one of ⁇ -Man branched chains of SG (10)
- MSG1 a sugar chain structure in which sialic acid at the non-reducing end is deleted in only one of ⁇ -Man branched chains of SG (10)
- MSG2 a sugar chain structure in which sialic acid at the non-reducing end is deleted in only one of
- the remodeled sugar chain of the present invention is N297- (Fuc) MSG1, N297- (Fuc) MSG2 or a mixture of N297- (Fuc) MSG1 and N297- (Fuc) MSG2, or N297- (Fuc) SG.
- N297- (Fuc) MSG1, N297- (Fuc) MSG2 or N297- (Fuc) SG are preferable, and N297- (Fuc) MSG1 and N297- (Fuc) MSG2 are more preferable.
- N297- (Fuc) MSG1 is represented by the following structural formula or sequence formula.
- L (PEG) represents — (CH 2 CH 2 —O) n 5 —CH 2 CH 2 —NH—
- the amino group at the right end is on the 1-3 chain side of the branched chain of ⁇ -Man of the N297 sugar chain. It shows that the carboxylic acid at the 2-position of sialic acid at the non-reducing end has an amide bond
- n 5 is an integer of 2 to 10, and preferably an integer of 2 to 5.
- N297- (Fuc) MSG2 is represented by the following structural formula or sequence formula.
- L (PEG) represents — (CH 2 CH 2 —O) n 5 —CH 2 CH 2 —NH—
- the amino group at the right end is on the 1-6 chain side of the ⁇ -Man branched chain of the N297 sugar chain. It shows that the carboxylic acid at the 2-position of sialic acid at the non-reducing end has an amide bond
- n 5 is an integer of 2 to 10, and preferably an integer of 2 to 5.
- N297- (Fuc) SG is represented by the following structural formula or sequence formula.
- L (PEG) represents-(CH 2 CH 2 -O) n 5 -CH 2 CH 2 -NH-
- the amino group at the right end is the 1-3 chain side of the ⁇ -Man branched chain of the N297 sugar chain and It shows that the carboxylic acid at the 2-position of sialic acid at both non-reducing ends on the 1-6 chain side is amide-bonded
- * indicates the 1,2,3-triazole of Lb in the linker L, particularly L in the linker L. Shows that it is bonded to the nitrogen atom at the 1- or 3-position on the ring,
- n 5 is an integer of 2 to 10, and preferably an integer of 2 to 5.
- the N297 sugar chain of the antibody in the antibody-drug conjugate of the present invention is N297- (Fuc) MSG1 or N297- (Fuc) MSG2 or a mixture thereof
- the antibody is a dimer and thus the antibody-drug conjugate.
- the sugar chain remodeling antibody can be produced, for example, according to the method described in WO2013 / 120066 and the like by the method represented by the following formula.
- Step R-1 Hydrolysis of glycosidic bond between GlcNAc ⁇ 1-4GlcNAc of chitobiose structure at the reducing end
- This step involves N binding to the target antibody with asparagine at the 297th amino acid sequence of the antibody using a known enzyme reaction.
- This is a step of preparing a sugar chain-cleaving antibody by cleaving the bond-type sugar chain (N297-linked sugar chain).
- the hydrolysis reaction of the glycoside bond is carried out.
- the reaction time is 10 minutes to 72 hours, preferably 1 hour to 6 hours.
- the wild-type EndoS enzyme is used in an amount of 0.1 to 10 mg, preferably 0.1 to 3 mg, per 100 mg of the antibody.
- an affinity chromatography purification and / or a hydroxyapatite column purification described below can be performed to produce a (Fuc ⁇ 1,6) GlcNAc antibody in which the sugar chain between GlcNAc ⁇ 1 and 4GlcNAc is hydrolyzed. .
- R-2 step Glycosyl transfer reaction
- the above-mentioned (Fuc ⁇ 1,6) GlcNAc antibody is enzymatically reacted with MSG (MSG1, MSG2) having a PEG linker containing an azido group or SG type sugar chain oxazoline derivative (
- MSG1, MSG2) having a PEG linker containing an azido group or SG type sugar chain oxazoline derivative
- it is a step of producing a sugar chain remodeling antibody by binding an “azido sugar chain oxazoline derivative”.
- the above sugar chain-cleaving antibody is reacted with an azido sugar chain oxazoline derivative in a buffer solution (phosphate buffer solution, etc.) at 0 ° C to 40 ° C in the presence of a catalytic amount of a glycosyltransferase such as EndoS (D233Q / Q303L). By doing so, the transglycosylation reaction is carried out.
- the reaction time is 10 minutes to 72 hours, preferably 1 hour to 6 hours.
- the EndoS enzyme (D233Q / Q303L) is used in an amount of 1 to 10 mg, preferably 1 to 3 mg, and the azido sugar chain oxazoline compound is used in an amount of 2 to excess equivalents, preferably 2 to 20 equivalents, relative to 100 mg of the antibody.
- purified sugar chain remodeling antibody can be obtained by carrying out affinity chromatography purification and hydoxyapatite column purification.
- the azido sugar chain oxazoline derivative can be prepared according to the method described in Example 11. Using a reaction (condensation reaction or the like) known to MSG1 in the field of organic synthetic science, N 3 — (CH 2 CH 2 —O) n 5 which is a PEG linker (N 3 -L (PEG)) containing an azido group is used. —CH 2 CH 2 —NH 2 can be introduced. That is, the carboxylic acid to the 2-position of sialic acid and the amino group at the right end of N 3 — (CH 2 CH 2 —O) n 5 —CH 2 CH 2 —NH 2 form an amide bond by a condensation reaction.
- the solvent used in the reaction is dichloromethane. , DMF, THF, ethyl acetate and the like, or a mixed solvent thereof are not particularly limited.
- the reaction temperature is usually in the range of -20 ° C to 100 ° C or the boiling point of the solvent, but is preferably in the range of -5 ° C to 50 ° C.
- an organic base such as triethylamine, diisopropylethylamine, N-methylmorpholine or 4-dimethylaminopyridine, or an inorganic base such as potassium carbonate, sodium carbonate, potassium hydrogen carbonate or sodium hydrogen carbonate can be added. .. Further, 1-droxybenzotriazole, N-hydroxysuccinimide and the like can be added as a reaction accelerator.
- MSG1 can be obtained by hydrolyzing the separated and purified (MSG1-) Asn (Example 11) with a hydrolase such as EndoM.
- Oxazolination can be prepared from GlcNAc at the reducing end of MSG1 according to a publicly known paper (J. Org Chem., 2009, 74 (5), 2210-2212. Helv. Chim. Acta, 2012, 95, 1928-1936.). .
- EndoS As the enzyme used for the hydrolysis reaction of N297 sugar chain, EndoS or a mutant enzyme retaining its hydrolysis activity can be used.
- a glycosyltransferase such as EndoS D233Q or EndoS D233Q / Q303L mutant (WO2017010559, etc.) is used for MSG (MSG1,
- An antibody having MSG (MSG1, MSG2) or SG type N297 sugar chain having the above structure can be obtained by reacting with MSG2) or SG type sugar chain donor molecule.
- a sugar chain donor molecule having MSG, MSG1 or MSG2 as a sugar chain is adopted.
- Such a sugar chain was prepared in the same manner as in Example 11 using commercially available monosialo-Asn free (1S2G / 1G2S-10NC-Asn, Glycotechnology Institute, Ltd., hereinafter referred to as “(MSG-) Asn”).
- (MSG1-) Asn or (MSG2-) Asn can be used separately, or can be used as a mixture without separation.
- a sugar chain donor molecule having SG (10) as a sugar chain is used for this glycosyl transfer reaction.
- an SG (10) sugar chain for example, one obtained by hydrolysis or the like from SGP may be used, and an SG (10) sugar chain such as commercially available disialooctasaccharide (Tokyo Chemical Industry Co., Ltd.) may be used. Chains may be used.
- the MSG (MSG1, MSG2) or SG type sugar chain contained in the donor molecule has a PEG linker (N 3 -L (PEG)) containing an azido group at the 2-position of its sialic acid.
- PEG linker N 3 -L (PEG)
- MSG1 or MSG2 or disialooctasaccharide (SG (10)) was used.
- PEG linker (N 3 -L (PEG)) containing an azido group, N 3- (CH 2 CH 2 -O) n 5 -CH 2 CH 2 -NH 2 (n 5 is an integer of 2 to 10, (Preferably an integer of 2 to 5) can be used by a reaction (condensation reaction or the like) known in the field of organic synthetic science. That is, the carboxylic acid to the 2-position of sialic acid and the amino group at the right end of N 3 — (CH 2 CH 2 —O) n 5 —CH 2 CH 2 —NH 2 form an amide bond by a condensation reaction.
- the MSG (MSG1, MSG2) or SG type sugar chain may be, for example, (MSG1-) Asn, (MSG2-) Asn or (SG-) Asn (glycan engineering) in which the ⁇ -amino group may be protected or modified.
- a PEG linker N 3 — (CH 2 CH 2 —O) n 5 —CH having an azido group by utilizing a condensation reaction with the carboxylic acid at the 2-position of the sialic acid and the carboxylic acid of Asn as a raw material 2 CH 2 —NH 2
- a hydrolase such as EndoM or EndoRp may be allowed to act on it.
- Examples of the protecting group for the ⁇ -amino group include an acetyl (Ac) group, a t-butoxycarbonyl (Boc) group, a benzoyl (Bz) group, a benzyl (Bzl) group, a carbobenzoxy (Cbz) group, and a 9-fluorenylmethoxycarbonyl (Fmoc) group.
- Examples include, but are not limited to:
- the protecting group for the ⁇ -amino group is preferably an Fmoc group.
- Examples of the ⁇ -amino group-modifying group include a hydroxyacetyl group, or a modifying group having a PEG structure or the like that improves water solubility.
- the ⁇ -amino group is preferably protected by the above protecting group.
- a protecting group eg, Fmoc group
- GlcNAc at the reducing end of MSG (MSG1, MSG2) or SG type sugar chain contained in the molecule can be, for example, oxazolylation by treatment with 2-chloro-1,3-dimethyl-1H-benzimidazol-3-ium-chloride. It is preferable to use the activated form.
- the enzyme used in the glycosyl transfer reaction various ones can be adopted as long as they have an activity of transferring the complex type sugar chain to the N297 sugar chain, and the 233th Asp of EndoS is preferable.
- EndoS D233Q which is a modified form in which hydrolysis reaction is suppressed by substituting Gln.
- the transglycosylation reaction using EndoS D233Q is described in WO2013 / 120066 and the like.
- a modified enzyme such as EndoS D233Q / Q303L in which mutation is added to EndoS D233Q may be used.
- the purification operation of the antibody after the sugar chain remodeling (sugar hydrolysis and transglycosylation reaction) of the antibody is aimed at separation from the low-molecular compound and the enzyme used in the reaction, and such purification is usually performed by Gel filtration chromatography, ion exchange chromatography, affinity chromatography and the like are used, but additional purification with a hydroxyapatite column may be performed. That is, the present invention provides a method for producing a drug-conjugate, which further comprises a purification step using a hydroxyapatite column in the purification step of the intermediate from the reaction solution after sugar hydrolysis of the antibody. According to the report example of sugar chain remodeling (J. Am. Chem. Soc.
- the antibody is treated with a hydrolase.
- the reaction solution obtained is only purified by a protein A column (affinity chromatography column), but with this purification method, the hydrolase (EndoS etc.) cannot be completely removed, and the residual enzyme influences the reaction It was found to affect the transglycosylation reaction.
- the reaction solution obtained by treating the antibody with a hydrolase was purified in the order of a protein A column and a hydroxyapatite column (CHT column, Bio-Rad Laboratories, Inc.) to remove residual enzyme. The reaction efficiency of the next transglycosylation reaction was improved without any influence.
- the concentration of the antibody aqueous solution, the concentration measurement, and the buffer exchange can be performed according to the following common operations A to C.
- Ab represents a sugar chain remodeling antibody
- La ′, Lp ′ and B ′ are synonymous with La
- Lp and B J represents one of the structural formulas shown below
- an asterisk indicates that it is bound to La '.
- a buffer solution of antibody Ab sodium acetate solution, sodium phosphate solution, sodium borate solution or the like or a mixture thereof
- compound (2) in a suitable solvent dimethyl sulfoxide (DMSO), dimethylformamide (DMF), dimethylacetamide (The DMAAC, N-methyl-2-pyridone (NMP), propylene glycol (PG), etc., or a mixture thereof) is mixed, whereby the SPAAC reaction proceeds.
- DMSO dimethyl sulfoxide
- DMF dimethylformamide
- NMP N-methyl-2-pyridone
- PG propylene glycol
- the compound (2) is 2 mol to excess mol, preferably 1 mol to 30 mol per 1 mol of the antibody, and the ratio of the organic solvent is preferably 1 to 200% v / v with respect to the antibody buffer.
- the reaction temperature is 0 ° C. to 37 ° C., preferably 10 ° C. to 25 ° C., and the reaction time is 1 to 150 hours, preferably 6 hours to 100 hours.
- the pH during the reaction is preferably 5 to 9.
- the antibody-drug conjugate is subjected to buffer exchange, purification, antibody concentration, and average drug binding number (DAR: Drug to Antibody Ratio) per antibody molecule by the common operations A to C and the common operations D to F described later.
- DAR Drug to Antibody Ratio
- the measurement can be performed to identify the antibody-drug conjugate compound (ADC).
- A280 represents the absorbance at 280 nm of the antibody-drug conjugate aqueous solution
- ⁇ 280 represents the molar extinction coefficient of the antibody-drug conjugate at 280 nm
- C (mol ⁇ L ⁇ 1 ) represents the antibody-drug conjugate.
- the molar concentration is shown. From the above formula (I), the molar concentration C (mol ⁇ L ⁇ 1 ) of the antibody-drug conjugate can be calculated by the following formula (II).
- the weight concentration C ′ (mg ⁇ mL ⁇ 1 ) of the antibody-drug conjugate can be obtained (equation (III )).
- the absorbance A280 a measured value of UV absorbance at 280 nm of the antibody-drug conjugate aqueous solution was used.
- the molar mass MW (g ⁇ mol ⁇ 1 ) uses the calculated estimated value of the antibody molecular weight obtained from the amino acid sequence of the antibody as an approximate value of the molar mass of the antibody-drug conjugate.
- the optical path length 1 (cm) was measured at 1 cm.
- the molar extinction coefficient ⁇ 280 of the antibody drug conjugate can be determined by the following formula (IV).
- ⁇ Ab, 280 indicates the molar extinction coefficient of the antibody at 280 nm
- ⁇ DL, 280 indicates the molar extinction coefficient of the drug at 280 nm.
- ⁇ Ab, 280 a value that can be estimated from the amino acid sequence of the antibody by a known calculation method (Protein Science, 1995, vol. 4, 2411-2423) was used.
- ⁇ DL, 280 the one calculated from the actual measurement value obtained by UV measurement each time was used. That is, the value obtained by measuring the absorbance of a solution in which a conjugate precursor (drug) was dissolved in a certain molar concentration and applying the Lambert-Beer law, formula (I) was used.
- HPLC system Agilent 1290 HPLC system (Agilent Technologies) Detector: UV Absorber (Measurement wavelength: 280nm, 329nm) Column: BEH Phenyl (2.1 ⁇ 50 mm, 1.7 ⁇ m, Waters Acquity) Column temperature: 75 ° C Mobile phase A: 0.1% trifluoroacetic acid (TFA), 15% isopropyl alcohol aqueous solution Mobile phase B: 0.075% TFA, 15% isopropyl alcohol acetonitrile solution Gradient program: 14% -36% (0 minutes-15 minutes) ), 36% -80% (15-17 minutes), 80% -14% (17 minutes-17.1 minutes), 14% -14% (17.1 minutes-23 minutes) Sample injection volume: 5 ⁇ L (F-3.
- H chain to which one drug is bound H 1
- H chain to which one drug is bound H 2
- H chain to which one drug is bound H 2
- the detected peak by retention time comparison from Rukoto and L 0 and H 0 L 0, H 0, H 1 can be assigned to any of the H2. Whether or not the drug is bound can also be confirmed by the characteristic 329 nm wavelength absorption of the drug.
- the peak area value is corrected according to the following formula using the molar absorption coefficient of the H chain and the drug linker according to the number of bonds of the drug linker.
- the molar extinction coefficient (280 nm) of the L chain and the H chain in each antibody is determined by a known calculation method (Protein Science, 1995, vol. 4, 2411-2423), and the amino acids of the L chain and the H chain of each antibody. The value estimated from the sequence was used. In the case of the H01L02 antibody, 81480 was used as the estimated value as the molar extinction coefficient of the H chain according to its amino acid sequence.
- the molar extinction coefficient of the H chain is 79829
- 80131 is the molar extinction coefficient of the H chain
- 78696 is the molar extinction coefficient of the H chain.
- 77470 was used as the molar extinction coefficient of the H chain
- the measured molar extinction coefficient (280 nm) of the drug precursor 1-4 as the conjugate precursor was used as the molar extinction coefficient of the drug linker (280 nm).
- anti-CDH6 antibody of the present invention and the functional fragment of the antibody described in the above section “2. Production of anti-CDH6 antibody” and Examples have internalization activity by binding to CDH6 on the surface of tumor cells. Therefore, alone or in combination with other drugs, as a drug, cancer such as renal cell tumor and ovarian tumor, for example, renal cell carcinoma, renal clear cell carcinoma, papillary renal cell carcinoma, ovarian cancer, ovarian serum Use as a therapeutic agent for gonadoma, thyroid cancer, cholangiocarcinoma, lung cancer (for example, small cell lung cancer or non-small cell lung cancer), glioblastoma, mesothelioma, uterine cancer, pancreatic cancer, Wilms tumor or neuroblastoma You can
- the anti-CDH6 antibody of the present invention and the functional fragment of the antibody have internalization activity, they can be provided as an antibody used for an antibody-drug conjugate.
- anti-CDH6 antibody-drug conjugates of the present invention described in the section “3. Anti-CDH6 antibody-drug conjugate” and Examples, a drug having antitumor activity such as cytotoxic activity is used as the drug.
- the anti-CDH6 antibody-drug conjugate of the present invention absorbs water or adsorbs adsorbed water to leave a hydrate by leaving it in the air or performing recrystallization or purification operation. And such a water-containing compound or a pharmaceutically acceptable salt is also included in the present invention.
- the anti-CDH6 antibody-drug conjugate of the present invention can optionally form a pharmacologically acceptable acid addition salt.
- an acid addition salt include hydrohalides such as hydrofluoride, hydrochloride, hydrobromide and hydroiodide; nitrates, perchlorates, sulfates and phosphates.
- Inorganic acid salts such as; methanesulfonic acid salts, trifluoromethanesulfonic acid salts, ethanesulfonic acid salts, etc. lower alkanesulfonic acid salts; benzenesulfonic acid salts, p-toluenesulfonic acid salts, etc.
- arylsulfonic acid salts Organic salts such as acetate, trifluoroacetate, malate, fumarate, succinate, citrate, tartrate, oxalate, maleate; or ornithate, glutamate, asparagine Examples thereof include amino acid salts such as acid salts.
- the anti-CDH6 antibody-drug conjugate of the present invention can optionally form a pharmacologically acceptable base addition salt.
- a base addition salt include alkali metal salts such as sodium salt, potassium salt and lithium salt; alkaline earth metal salts such as calcium salt and magnesium salt; inorganic salts such as ammonium salt; dibenzylamine salt and morpholine.
- phenylglycine alkyl ester salt ethylenediamine salt, N-methylglucamine salt, diethylamine salt, triethylamine salt, cyclohexylamine salt, dicyclohexylamine salt, N, N′-dibenzylethylenediamine salt, diethanolamine salt, N-benzyl-N
- organic amine salts such as-(2-phenylethoxy) amine salt, piperazine salt, tetramethylammonium salt and tris (hydroxymethyl) aminomethane salt.
- the present invention may also include anti-CDH6 antibody-drug conjugates in which one or more of the atoms that make up the antibody-drug conjugate have been substituted with an isotope of that atom.
- isotopes There are two types of isotopes, radioactive isotopes and stable isotopes. Examples of isotopes include, for example, hydrogen isotopes ( 2 H and 3 H), carbon isotopes ( 11 C, 13 C and 14 C), nitrogen isotopes ( 13 N and 15 N), oxygen isotopes ( 15 O, 17 O and 18 O), and fluorine isotopes ( 18 F).
- composition containing the antibody-drug conjugate labeled with an isotope is useful as, for example, a therapeutic agent, a prophylactic agent, a research reagent, an assay reagent, a diagnostic agent, an in vivo diagnostic imaging agent, or the like.
- Isotope-labeled antibody-drug conjugates and mixtures of isotopically-labeled antibody-drug conjugates in any proportion are also encompassed by the invention.
- the isotope-labeled antibody-drug conjugate can be produced by a method known in the art, for example, by using an isotope-labeled raw material instead of the raw material in the production method of the present invention described below. You can
- In vitro cell killing activity can be measured, for example, by the cell growth inhibitory activity.
- the cell growth inhibitory activity For example, it is possible to culture a cancer cell line overexpressing CDH6, add anti-CDH6 antibody-drug conjugates at various concentrations to the culture system, and measure the focus activity, colony formation and spheroid proliferation inhibitory activity. it can.
- the cell growth inhibitory activity against renal cell tumors and ovarian tumors can be examined.
- the therapeutic effect on cancer using in vivo experimental animals is, for example, the change in cancer cells after the anti-CDH6 antibody-drug conjugate was administered to nude mice transplanted with a tumor cell line that highly expresses CDH6. Can be measured.
- a tumor cell line that highly expresses CDH6.
- an animal model in which cells derived from renal cell carcinoma, clear cell renal cell carcinoma, papillary renal cell carcinoma, ovarian cancer, ovarian serous adenocarcinoma or thyroid cancer are transplanted into immunodeficient mice.
- the therapeutic effect on cancer, renal clear cell carcinoma, papillary renal cell carcinoma, ovarian cancer, ovarian serous adenocarcinoma or thyroid cancer can be measured.
- the type of cancer to which the anti-CDH6 antibody-drug conjugate of the present invention is applied is not particularly limited as long as it is a cancer in which CDH6 is expressed in the cancer cells to be treated, and, for example, renal cell carcinoma ( For example, clear cell renal cell carcinoma or papillary renal cell carcinoma), ovarian cancer, serous adenocarcinoma of the ovary, thyroid cancer, cholangiocarcinoma, lung cancer (eg small cell lung cancer or non-small cell lung cancer), glioblastoma, mesothelium. Tumor, uterine cancer, pancreatic cancer, Wilms tumor or neuroblastoma, but is not limited thereto as long as it expresses CDH6.
- examples of more preferable cancers include renal cell carcinoma (for example, renal clear cell carcinoma and papillary renal cell carcinoma) or ovarian cancer.
- the anti-CDH6 antibody-drug conjugate of the present invention can be preferably administered to mammals, but is more preferably human.
- the substance to be used in the pharmaceutical composition containing the anti-CDH6 antibody-drug conjugate of the present invention should be appropriately selected and applied from the formulation additives and the like usually used in this field at the dose and the dose concentration. You can
- the anti-CDH6 antibody-drug conjugates of the present invention can be administered as a pharmaceutical composition containing one or more pharmaceutically compatible ingredients.
- the pharmaceutical compositions typically include one or more pharmaceutical carriers such as sterile liquids such as water and oils (oils of petroleum, animal, vegetable or synthetic origin (eg peanut oil). , Soybean oil, mineral oil, sesame oil, etc.))). Water is a more typical carrier when the above pharmaceutical composition is administered intravenously. Saline solution, and dextrose and glycerol solutions. They can also be used as liquid carriers, especially for injectable solutions.Suitable pharmaceutical excipients are known in the art.
- the compositions can, if desired, also contain minor amounts of wetting agents. Alternatively, it may include an emulsifying agent, or a pH buffering agent.Examples of suitable pharmaceutical carriers are described in "Remington's Pharmaceutical Sciences" by EW Martin, the formulation of which corresponds to the mode of administration.
- Various delivery systems are known and can be used to administer the anti-CDH6 antibody-drug conjugates of the invention.
- Methods of introduction include, but are not limited to, intradermal, intramuscular, intraperitoneal, intravenous, and subcutaneous routes. Administration can be, for example, by infusion or bolus injection. In certain preferred embodiments, administration of the antibody-drug conjugate is by infusion. Parenteral administration is the preferred route of administration.
- the pharmaceutical composition is formulated in accordance with routine procedures as a pharmaceutical composition adapted for intravenous administration to human beings.
- compositions for intravenous administration are solutions in sterile isotonic aqueous buffer.
- the medicament may also include a solubilizer and a local anesthetic (eg, lignocaine) to relieve pain at the injection site.
- a solubilizer e.g, lignocaine
- the above components may be combined together (eg, as a dry lyophilized powder or anhydrous concentrate in a hermetically sealed container such as an ampoule or sachette indicating the quantity of active agent, either separately or in a unit dosage form).
- the medicament can be dispensed, for example, with an infusion bottle containing sterile pharmaceutical grade water or saline.
- an ampoule of sterile water for injection or saline can be provided, eg, so that the above ingredients may be mixed prior to administration.
- the pharmaceutical composition of the present invention may be a pharmaceutical composition containing only the anti-CDH6 antibody-drug conjugate of the present application, or may contain an anti-CDH6 antibody-drug conjugate and at least one other therapeutic agent for cancer. It may be a pharmaceutical composition.
- the anti-CDH6 antibody-drug conjugate of the present invention can also be administered together with other therapeutic agents for cancer, whereby the anti-cancer effect can be enhanced.
- Other anti-cancer agents used for such purposes may be administered to an individual simultaneously or separately with the antibody-drug conjugate, or may be administered at different intervals. Good.
- cancer therapeutic agents include tyrosine kinase inhibitors such as Imatinib, Sunitinib and Regorafenib, CDK4 / 6 inhibitors such as Palbobiclib, HSP90 inhibitors such as TAS-116, MEK inhibitors such as MEK162, Examples thereof include immune checkpoint inhibitors including nivolumab, pembrolizumab, ipilimumab, etc., but are not limited as long as they have antitumor activity.
- tyrosine kinase inhibitors such as Imatinib, Sunitinib and Regorafenib
- CDK4 / 6 inhibitors such as Palbobiclib
- HSP90 inhibitors such as TAS-116
- MEK inhibitors such as MEK162
- immune checkpoint inhibitors including nivolumab, pembrolizumab, ipilimumab, etc., but are not limited as long as they have antitumor activity.
- Such a pharmaceutical composition may be formulated as a freeze-dried preparation or a liquid preparation as a preparation having a selected composition and required purity.
- a freeze-dried formulation it may be a formulation containing appropriate formulation additives used in this field.
- a liquid preparation can be prepared as a liquid preparation containing various preparation additives used in this field.
- the anti-CDH6 antibody-drug conjugate contained in the pharmaceutical composition of the present invention has an affinity for the antigen of the antibody-drug conjugate, that is, dissociation with respect to the antigen.
- affinity for the antigen of the antibody-drug conjugate
- dissociation with respect to the antigen.
- the affinity lower the affinity (lower the Kd value)
- the dose can also be set based on the situation of the affinity between the antibody-drug conjugate and the antigen.
- the antibody-drug conjugate of the present invention When the antibody-drug conjugate of the present invention is administered to a human, for example, about 0.001 to 100 mg / kg may be administered once or multiple times at an interval of once every 1 to 180 days.
- 0.1 to 50 mg / kg Preferably 0.1 to 50 mg / kg, more preferably 1 to 50 mg / kg, 1 to 30 mg / kg, 1 to 20 mg / kg, 1 to 15 mg / kg, 2 to 50 mg / kg, 2 to The dose may be 30 mg / kg, 2 to 20 mg / kg or 2 to 15 mg / kg once every 1 to 4 weeks, preferably once every 2 to 3 weeks.
- the cDNA encoding the cynomolgus CDH6 protein was obtained by using cDNA synthesized from total RNA of cynomolgus monkey kidney as a template for primer 1 (5'-CACCATGAGAACTTACCGCTACTTTCTTGCTGC-3 ') (SEQ ID NO: 8) and primer 2 (5'-TTAGGAGTCTTTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTC
- cynomolgus CDH6 corresponded to the extracellular region of cynomolgus CDH6 (NCBI, XP — 0055556691.1). In addition, it was confirmed that the full-length sequence was identical to cynomolgus CDH6 (EHH54180.1) registered in EMBL.
- the cynomolgus CDH6 expression vector pcDNA3.1-cynoCDH6 was prepared by incorporating it into a mammalian expression vector according to a method known to those skilled in the art.
- the amino acid sequence of cynomolgus CDH6 ORF is shown in SEQ ID NO: 7.
- pcDNA3.1-hCDH6 or pcDNA3.1-cynoCDH6 or pcDNA3.1 as a negative control was introduced into these 293 ⁇ cells, and 96- After 100 ⁇ L each was dispensed into a well plate (Corning), the cells were cultured in a 10% FBS-containing DMEM medium at 37 ° C. and 5% CO 2 for 24 to 27 hours. The obtained transfected cells were used in Cell-ELISA in the adhered state.
- OPD color development solution OPD lysate (0.05 M trisodium citrate, 0.1 M disodium hydrogen phosphate 12 water pH 4. In 5), o-phenylenediamine dihydrochloride (Wako Pure Chemical Industries, Ltd.) and H 2 O 2 were dissolved at 0.4 mg / mL and 0.6% (v / v) respectively) at 100 ⁇ L / well. did.
- the color reaction was carried out with occasional agitation, 1 M HCl was added at 100 ⁇ L / well to stop the color reaction, and then the absorbance at 490 nm was measured by a plate reader (ENVISION: PerkinElmer).
- hybridoma producing a culture supernatant showing higher absorbance in pcDNA3.1-hCDH6 and pcDNA3.1-cynoCDH6 expression vector-introduced 293 ⁇ cells were human and cynomolgus CDH6. was selected as an antibody-producing hybridoma that binds to.
- Example 1 Flow cytometric analysis The binding specificity of the antibody produced by the antibody-producing hybridoma that binds to human and cynomolgus CDH6 selected by Cell-ELISA of Example 1) -4 to cynomolgus CDH6 Further confirmation by the metric method.
- Example 1) The suspension of transiently expressed 293T cells prepared in -5-1 was centrifuged, the supernatants were removed, and the hybridoma culture supernatants were added to the suspensions and suspended at 4 ° C for 1 hour. I let it stand.
- a histogram of FITC fluorescence intensity of living cells was prepared. Compared to the fluorescence intensity histogram of pcDNA3.1-introduced 293T cells, which is a control, the histogram of pcDNA3.1-cynoCDH6-introduced 293T cells was shifted to the high fluorescence intensity side. It was selected as an antibody-producing hybridoma that specifically binds.
- Rat anti-human CDH6 monoclonal antibody was purified from the hybridoma culture supernatant.
- a rat anti-CDH6 monoclonal antibody-producing hybridoma was grown to a sufficient amount in ClonaCell-HY Selection Medium E (StemCell Technologies), and then Ultra Low IgG FBS (Thermo Fisher Scientifimorphic 20% addition) was added. The medium was exchanged with Scientific) and the cells were cultured for 4-5 days. The main culture supernatant was collected, passed through a 0.8 ⁇ m filter, and then passed through a 0.2 ⁇ m filter to remove insoluble materials.
- Rat anti-CDH6 antibody rG019 was purified by Protein G affinity chromatography from the culture supernatant of the hybridoma prepared in Example 1) -7-1. The antibody was adsorbed to a Protein G column (GE Healthcare Bioscience), the column was washed with PBS, and then eluted with 0.1 M glycine / hydrochloric acid aqueous solution (pH 2.7).
- Example 2 In vitro evaluation of rat anti-CDH6 antibody
- Example 2 In vitro evaluation of rat anti-CDH6 antibody
- 293T cells ATCC
- Lipofectamine 2000 Thermo Fisher Scientific
- the cells were transiently introduced at 37 ° C. and 5% CO 2 conditions. After overnight culture, the cells were treated with TrypLE Express (Thermo Fisher Scientific) to prepare a cell suspension.
- the gene-introduced 293T cell suspension was centrifuged, the supernatant was removed, and the rat anti-CDH6 monoclonal antibody rG019 or rat IgG control (R & D Systems) prepared in Example 1) -7 was added to a final concentration of 10 ng / mL.
- the cells were suspended and left at 4 ° C. for 1 hour.
- Anti-Rat IgG (whole molecule) -FITC antibody produced in rabbit (SIGMA) diluted 50 times with PBS containing 5% FBS was added and suspended at 4 ° C. for 1 hour. Let stand for hours.
- FIG. 1 In the histogram of FIG. 1, the horizontal axis represents the fluorescence intensity of FITC representing the amount of antibody bound, and the vertical axis represents the number of cells.
- the histogram shown by hatching shows the case of using the negative control 293T cells into which hCDH6 has not been introduced, and the histogram shown by the open solid line shows the case of using hCDH6 introduced 293T cells. It shows that the fluorescence intensity was enhanced by the binding of the antibody to hCDH6 on the cell surface.
- the rat IgG control does not bind to any cells. As a result, it was confirmed that the prepared four rat anti-CDH6 monoclonal antibodies bind to pcDNA3.1-hCDH6-introduced 293T cells.
- Treatment was performed to prepare a cell suspension.
- the introduced 293 ⁇ cell suspension was centrifuged, and the supernatant was removed.
- rG019) prepared in Example 1) -7 or rat IgG control (R & D Systems) was added at a final concentration of 20 nM and suspended, and the suspension was added at 4 ° C. for 1 hour. Let stand for hours.
- Anti-Rat IgG (whole molecule) -FITC antibody produced in rabbit (SIGMA) diluted 50 times with PBS containing 5% FBS was added and suspended at 4 ° C. for 1 hour. Let stand for hours.
- FIGS. 2-1 and 2-2 The results are shown in FIGS. 2-1 and 2-2.
- the horizontal axis represents the fluorescence intensity of FITC representing the amount of antibody bound
- the vertical axis represents the number of cells.
- the histograms shown in shaded areas show the case of using the negative control 293 ⁇ cells into which no gene has been introduced, and the histograms shown by the open solid line show the cases of using full-length hCDH6 or 293 cells lacking each EC domain.
- rG019 binds to full length hCDH6, EC1 deletions, EC2 deletions, EC4 deletions, and EC5 deletions, but not EC3 deletions. From this result, it was shown that rG019 specifically binds with EC3 of hCDH6 as an epitope.
- CDH6 expression information is searched from a publicly known database, and CDH6 on the cell membrane surface is analyzed by flow cytometry.
- FIG. 3 In the histogram of FIG. 3, the horizontal axis represents the fluorescence intensity of FITC, which represents the amount of antibody bound, and the vertical axis represents the number of cells.
- the shaded histogram shows the case of staining with the negative control mIgG1, and the histogram shown with an open solid line shows the case of staining with the anti-human CDH6 antibody. It shows that the fluorescence intensity was enhanced by the binding of the antibody to hCDH6 on the cell surface.
- the mIgG1 control does not bind to any cells.
- the NIH: OVCAR-3, PA-1, OV-90 and 786-O, Caki-1 cell lines endogenously express CDH6 on the cell surface.
- Example 3 Amplification and sequencing of gene fragments of rG019 heavy chain variable region and light chain variable region 3) -1 Preparation of total RNA from G019 antibody-producing hybridoma G019 antibody for amplifying cDNA containing rG019 variable region Total RNA was prepared from the produced hybridoma using TRIzol Reagent (Ambion).
- the cDNA containing the variable region of the heavy chain amplified by 5'-RACE PCR was cloned into a plasmid, and then the sequence analysis of the nucleotide sequence of the cDNA of the variable region of the heavy chain was performed.
- nucleotide sequence of the determined cDNA encoding the variable region of the heavy chain of rG019 is shown in SEQ ID NO: 16, and the amino acid sequence is shown in SEQ ID NO: 15.
- nucleotide sequence of the determined cDNA encoding the variable region of the light chain of rG019 is shown in SEQ ID NO: 11, and the amino acid sequence is shown in SEQ ID NO: 10.
- Example 4 Preparation of human chimerized anti-CDH6 antibody chG019] 4) -1 Construction of human chimerized anti-CDH6 antibody chG019 expression vector 4) -1-1 Construction of chimeric and humanized light chain expression vector pCMA-LK Plasmid pcDNA3.3-TOPO / LacZ (Invitrogen) was used as a restriction enzyme XbaI.
- PCMA-LK was constructed by removing the neomycin expression unit from pcDNA3.3 / LK.
- chG019 heavy chain expression vector The DNA fragments shown in nucleotide numbers 36 to 440 of the nucleotide sequence of chG019 heavy chain shown in SEQ ID NO: 27 were synthesized (GENEART). Using the In-Fusion HD PCR cloning kit (Clontech), the chG019 heavy chain expression vector was constructed by inserting the synthesized DNA fragment into the site where pCMA-G1 was digested with the restriction enzyme BlpI. The chG019 heavy chain used a sequence in which cysteine in the CDR was replaced with proline in order to prevent an unexpected disulfide bond.
- chG019 light chain expression vector A DNA fragment containing a DNA sequence encoding the chG019 light chain shown in SEQ ID NO: 22 was synthesized (GENEART). Using the In-Fusion HD PCR Cloning Kit (Clontech) to ligate the DNA fragment obtained by digesting the synthesized DNA fragment and pCMA-LK with XbaI and PmeI to remove the light chain signal sequence and the human ⁇ chain constant region The chG019 light chain expression vector was constructed by
- Opti-Pro SFM medium Invitrogen, 0.24 mg of heavy chain expression vector, 0.36 mg of light chain expression vector and 1.8 mg of Polyethyleneenemine (Polyscience # 24765) were added and gently stirred, and further 5 After allowing to stand for minutes, it was added to FreeStyle 293F cells. After shaking culture at 37 ° C. and 8% CO 2 incubator for 4 hours at 90 rpm, 600 ml of EX-CELL VPRO medium (SAFC Biosciences), 18 ml of GlutaMAX I (GIBCO), and 30 ml of Yeastolate Ultrafiltrate (GIBCO) were added.
- SAFC Biosciences SAFC Biosciences
- GlutaMAX I GlutaMAX I
- GBCO Yeastolate Ultrafiltrate
- the mixture was added, and the culture supernatant obtained by culturing with shaking at 90 rpm for 7 days in an 8% CO 2 incubator at 37 ° C. was filtered with a Disposable Capsule Filter (Advantec # CCS-045-E1H).
- Example 4 -2-2 Purification of chG019
- the culture supernatant obtained in Example 4) -2-1 was purified by a one-step process of rProtein A affinity chromatography.
- the culture supernatant was applied to a column (manufactured by GE Healthcare Bioscience) packed with MabSelectSuRe equilibrated with PBS, and then the column was washed with at least twice the column volume of PBS. Next, elution was performed with a 2M arginine hydrochloride solution (pH 4.0), and the fractions containing the antibody were collected.
- a 2M arginine hydrochloride solution pH 4.0
- the fractions were subjected to dialysis (Thermo Scientific, Slide-A-Lyzer Dialysis Cassette) to replace the buffer with HBSor (25 mM histidine / 5% sorbitol, pH 6.0).
- the antibody was concentrated with Centrifugal UF Filter Device VIVASPIN20 (molecular weight cutoff UF10K, Sartorius) to prepare an IgG concentration of 5 mg / ml or more. Finally, it was filtered through a Minisart-Plus filter (Sartorius) to obtain a purified sample.
- chG019 did not bind to the negative control pcDNA3.1-introduced 293T cells, but bound to pcDNA3.1-hCDH6 and pcDNA3.1-cynoCDH6-introduced 293T cells in an antibody concentration-dependent manner.
- the horizontal axis represents the antibody concentration
- the vertical axis represents the binding amount as Mean Fluorescent Intensity (mean fluorescence intensity). From this result, it is found that chG019 specifically binds to human and cynomolgus CDH6, and the binding activities are almost the same.
- Example 5 Preparation of humanized anti-CDH6 antibody
- 5) -1 Design of humanized anti-CDH6 antibody
- 5) -1-1
- Molecular modeling of chG019 variable region is performed by a method known as homology modeling (Methods in Enzymology, 203, 121-153). , (1991)) was used.
- the structure (PDB ID: 2I9L) registered in the Protein Data Bank (Nuc. Acid Res. 35, D301-D303 (2007)) having high sequence identity to the heavy and light chain variable regions of chG019 is shown.
- a commercially available protein three-dimensional structure analysis program BioLuminate manufactured by Schrodinger was used as a template.
- subgroups of the human group subgroups of the group 1 and subgroups of the subgroups of the group 1 and the group of subgroups of the human chain, the subgroups of the group 1 and the group of the subgroups of the group 1 and the group of the subgroups of the subgroups of the group 1 and the subgroups of the group 1 and the group of the subgroups of the group. It was selected as an acceptor for the heavy and light chains, respectively, because of its high identity to the framework regions. Donor residues to be transferred onto the acceptor are described by Queen et al. (Proc. Natl. Acad. Sci. USA 86, 10029-10033 (1989)) and selected by analyzing the three-dimensional model.
- the full length heavy chain amino acid sequence of hH01 is set forth in SEQ ID NO: 39.
- the nucleotide sequence encoding the amino acid sequence of SEQ ID NO: 39 is set forth in SEQ ID NO: 40.
- the full length heavy chain amino acid sequence of hH02 is set forth in SEQ ID NO: 43.
- the nucleotide sequence encoding the amino acid sequence of SEQ ID NO: 43 is set forth in SEQ ID NO: 44.
- the full length heavy chain amino acid sequence of hH04 is set forth in SEQ ID NO: 47.
- the nucleotide sequence encoding the amino acid sequence of SEQ ID NO: 47 is set forth in SEQ ID NO: 48.
- the two designed light chains were designated as hL02 and hL03.
- the full length light chain amino acid sequence of hL02 is set forth in SEQ ID NO: 31.
- the nucleotide sequence encoding the amino acid sequence of SEQ ID NO: 31 is set forth in SEQ ID NO: 32.
- the full length light chain amino acid sequence of hL03 is set forth in SEQ ID NO: 35.
- the nucleotide sequence encoding the amino acid sequence of SEQ ID NO: 35 is set forth in SEQ ID NO: 36.
- H01L02 antibody The antibody consisting of hH01 and hL02 is referred to as "H01L02 antibody” or "H01L02".
- An antibody consisting of hH02 and hL02 is referred to as "H02L02 antibody” or "H02L02".
- the antibody consisting of hH02 and hL03 is referred to as "H02L03 antibody” or "H02L03".
- the antibody consisting of hH04 and hL02 is referred to as "H04L02 antibody” or "H04L02".
- hH02 Heavy Chain Expression Vector The DNA fragments shown in nucleotide numbers 36 to 440 in the nucleotide sequence of hH02 heavy chain shown in SEQ ID NO: 44 were synthesized (GENEART). A hH02 heavy chain expression vector was constructed in the same manner as in Example 4) -1-3.
- hH04 Heavy Chain Expression Vector The DNA fragments shown in nucleotide numbers 36 to 440 of the nucleotide sequence of hH04 heavy chain shown in SEQ ID NO: 48 were synthesized (GENEART). A hH04 heavy chain expression vector was constructed in the same manner as in Example 4) -1-3.
- hL02 light chain expression vector Shown at nucleotide numbers 37 to 399 of nucleotide sequence of hL02 light chain shown in SEQ ID NO: 32.
- a DNA fragment containing a DNA sequence encoding the variable region of the hL02 light chain was synthesized (GENEART).
- the hL02 light chain expression vector was constructed by inserting the synthesized DNA fragment into the site where pCMA-LK was cleaved with the restriction enzyme BsiWI.
- hL03 Light Chain Expression Vector A DNA fragment containing a DNA sequence encoding the variable region of the hL03 light chain shown in nucleotides 37 to 399 of the nucleotide sequence of hL03 light chain shown in SEQ ID NO: 36. was synthesized (GENEART).
- Example 5 An hL03 light chain expression vector was constructed in the same manner as in 5-5-2-1.
- Example 5 -5-3-2 2 step purification of H01L02, H02L02, H02L03, H04L02
- the culture supernatant obtained in Example 5) -5-3-1 was subjected to a two-step process of rProtein A affinity chromatography and ceramic hydroxyapatite. Purified.
- the culture supernatant was applied to a column (manufactured by GE Healthcare Bioscience) packed with MabSelectSuRe equilibrated with PBS, and then the column was washed with at least twice the column volume of PBS.
- the antibody was eluted with a 2M arginine hydrochloride solution (pH 4.0).
- the antibody-containing fraction was subjected to dialysis (Thermo Scientific, Slide-A-Lyzer Dialysis Cassette) to replace the buffer with PBS, and diluted 5 times with a buffer of 5 mM sodium phosphate / 50 mM MES / pH 7.0. It was applied to a ceramic hydroxyapatite column (Bio-Scale CHT Type-1 Hydroxyapatite Column, Japan Bio-Rad) equilibrated with a buffer of 5 mM NaPi / 50 mM MES / 30 mM NaCl / pH 7.0. A linear gradient elution with sodium chloride was performed, and the fractions containing the antibody were collected.
- the fractions were subjected to dialysis (Thermo Scientific, Slide-A-Lyzer Dialysis Cassette) to replace the buffer with HBSor (25 mM histidine / 5% sorbitol, pH 6.0).
- the antibody was concentrated with Centrifugal UF Filter Device VIVASPIN20 (fraction molecular weight UF10K, Sartorius) to prepare an IgG concentration of 20 mg / ml. Finally, it was filtered through a Minisart-Plus filter (Sartorius) to obtain a purified sample.
- the anti-CDH6 antibody NOV0712 used in the examples is the amino acid sequence of the full-length light chain and the full-length heavy chain of NOV0712 described in WO2016 / 024195 (SEQ ID NO: 235 and SEQ ID NO: WO024024195, respectively). 234).
- Example 1 -1-2 Construction of anti-CDH6 antibody NOV0712 light chain expression vector Encoding the variable region of NOV0712 light chain shown in nucleotide numbers 37 to 405 of the nucleotide sequence of NOV0712 light chain shown in SEQ ID NO: 52. A DNA fragment containing a DNA sequence was synthesized (GENEART).
- Example 5 A light chain expression vector for NOV0712 was constructed in the same manner as in 5-5-2-1.
- the amino acid sequence of the NOV0712 light chain expressed by the NOV0712 light chain expression vector is shown in SEQ ID NO: 51.
- the amino acid sequence consisting of amino acid residues 1 to 20 in the amino acid sequence shown in SEQ ID NO: 51 is a signal sequence.
- Reference example 1) -2 Preparation of anti-CDH6 antibody NOV0712 Reference example 1) -2-1 Production of anti-CDH6 antibody NOV0712 NOV0712 was produced in the same manner as in Example 4) -2-1.
- Reference Example 1) -2-2 1-step purification of anti-CDH6 antibody NOV0712
- the anti-CDH6 antibody NOV0712 was purified from the culture supernatant obtained in Reference Example 1) -2-1 by the same method as in Example 4) -2-2.
- Antibody concentration HBSor was 5 mg / l).
- Example 6 In vitro evaluation of humanized hG019 and NOV0712] 6) -1 Humanized hG019 binding evaluation antibody
- the dissociation constant between the antibody and the antigen was measured by using Biacore T200 (GE Healthcare Bioscience) and immobilized anti-His.
- the capture was performed by capturing (capturing) the antibody with the antigen as the ligand and measuring the antibody as the analyte.
- the anti-histidine antibody His capture kit, GE Healthcare Bioscience
- the reference cell was similarly immobilized.
- HBS-P + (10 mM HEPES pH 7.4, 0.15 M NaCl, 0.05% Surfactant P20) supplemented with 1 mM CaCl 2 was used as a running buffer.
- the antibody dilution series solution (0.391-100 nM) was added at a flow rate of 30 ⁇ l / min for 300 seconds, and then the dissociation phase for 600 seconds was monitored. did.
- Glycine solution pH 1.5 added with 5M MgCl 2 was added twice at a flow rate of 10 ⁇ l / min for 30 seconds.
- the dissociation constant (KD) was calculated using the Steady State Affinity model of analysis software (BIAevaluation software, version 4.1). The results are shown in Table 2.
- Example 5 four humanized hG019 antibodies (clone numbers: H01L02, H02L02, H02L03 and H04L02) prepared in Example 5) -5-3 were prepared.
- anti-CDH6 antibody NOV0712 prepared in Reference Example 1 or human IgG1 (Calbiochem) as a negative control was added and suspended, and the suspension was left at 4 ° C. for 1 hour.
- APC-anti-human IgG goat F (ab ') 2 Jackson laboratory
- diluted 500-fold with 5% FBS-containing PBS was added and suspended at 4 ° C for 1 hour. Let stand for hours.
- FIGS. 5-1 to 5-6 After washing twice with PBS containing 5% FBS, detection was performed with a flow cytometer (Canto II: BD Biosciences). Data analysis was performed with FlowJo (TreeStar). The results are shown in FIGS. 5-1 to 5-6.
- the horizontal axis represents the fluorescence intensity of APC representing the amount of antibody bound
- the vertical axis represents the number of cells.
- the histograms shown in shaded areas show the case of using the negative control 293 ⁇ cells into which no gene has been introduced, and the histograms shown by the open solid lines show the cases of using full-length hCDH6 or 293 ⁇ cells lacking each EC domain.
- the human IgG1 control does not bind to any transfected cells.
- the four humanized hG019 antibodies (clone numbers: H01L02, H02L02, H02L03 and H04L02) bind to full-length hCDH6, EC1 deleted form, EC2 deleted form, EC4 deleted form, and EC5 deleted form, It does not bind to EC3 deletions. That is, it was shown that the four humanized hG019 antibodies specifically bind with EC3 of hCDH6 as an epitope.
- the anti-CDH6 antibody NOV0712 binds to full-length hCDH6, EC1 deleted form, EC2 deleted form, EC3 deleted form, and EC4 deleted form, but does not bind to EC5 deleted form. That is, the anti-CDH6 antibody NOV0712 antibody was shown to specifically bind with EC5 of hCDH6 as an epitope, which is consistent with the epitope information of NOV0712 described in International Publication No. WO 2016/024195. From this result, it was shown that NOV0712 and the four humanized hG019 antibodies obtained in the present specification are anti-CDH6 antibodies having different properties.
- 786-O / hCDH6 stable expression cell line 786-O / hCDH6 stable expression cell line is human 786-O cells (ATCC) It was prepared by infecting a recombinant retrovirus for expressing CDH6 full length.
- the human CDH6 expression retrovirus vector (pQCXIN-hCDH6) is incorporated into the retrovirus vector pQCXIN (CLONTECH) according to a method known to those skilled in the art using a cDNA expression vector (OriGene RC217889) encoding the human CDH6 protein (NP_004923).
- the shaded histogram shows the case of staining with the negative control mIgG1, and the histogram shown with an open solid line shows the case of staining with the anti-human CDH6 antibody. It shows that the fluorescence intensity was enhanced by the binding of the antibody to hCDH6 on the cell surface.
- the mIgG1 control does not bind to any cells.
- the 786-O / hCDH6 stable expression cell line highly expresses human CDH6 as compared with the parent strain 786-O cells.
- the horizontal axis represents the final concentration of the unlabeled antibody when added, and the vertical axis represents the binding amount as Mean Fluorescent Intensity (mean fluorescence intensity).
- Mean Fluorescent Intensity mean fluorescence intensity
- Human CDH6-positive renal cell tumor cell line 786-O (ATCC) was seeded on a 96-well plate at 1 ⁇ 10 3 cells / well and cultured overnight.
- Human CDH6-positive ovarian tumor cell line PA-1 (ATCC) was seeded on a 96-well plate at 1 ⁇ 10 3 cells / well and cultured overnight under the conditions of 37 ° C. and 5% CO 2 .
- anti-CDH6 antibody final concentration: 1 nM
- human IgG1 antibody (Calbiochem) as a negative control antibody was added.
- Hum-ZAP final concentration: 0.5 nM
- F (ab ') 2 Fragment Goat Anti-human IgG, Fc (gamma) Fragment Specific (JACKSON IMMUNORESEARCH) final concentration: toxin-free
- 0.5 nM was added and the cells were cultured for 3 days at 37 ° C. under 5% CO 2 .
- the number of viable cells was measured by quantifying the ATP activity (RLU) by CellTiter-Glo TM Luminescent Cell Viability Assay.
- Hum-ZAP is taken up into the cell depending on the internalization activity of the humanized anti-CDH6 antibody, and saporin, which inhibits protein synthesis, is released into the cell, thereby suppressing cell growth.
- the cell growth inhibitory effect by the addition of the anti-CDH6 antibody was expressed as a relative survival rate with the number of viable cells in the well in which a negative control was added instead of Hum-ZAP as 100%.
- FIG. 8 shows a table of cell viability. Antibodies with strong internalization activity in this experiment are considered to exhibit low cell viability.
- the four humanized hG019 antibodies had an internalization rate of about 50 to 75% predicted from the cell viability in all three cell lines, and showed a very high internalization activity, which was comparable to NOV0712. Shows even higher intrinsic activity. From the mechanism of ADC drug efficacy, an antibody having high internalization activity is considered to be more suitable as an ADC antibody.
- Example 7 Preparation of variant of humanized hG019
- 7) -1 Design of humanized hG019 variant 7) -1-1 Design of variable region variant of H01L02 Heavy chain in which the 71st tyrosine in the hH01 amino acid sequence described in Example 5) -2 was replaced with alanine was designated as hH11, the 81st glutamine was replaced with serine, and the heavy chain in which the 123rd phenylalanine was replaced with alanine was designated as hH31.
- the heavy chain variable region amino acid sequence of hH11 is set forth in SEQ ID NO: 55.
- the nucleotide sequence encoding the amino acid sequence of SEQ ID NO: 55 is set forth in SEQ ID NO: 56.
- the heavy chain variable region amino acid sequence of hH31 is set forth in SEQ ID NO: 60.
- the nucleotide sequence encoding the amino acid sequence of SEQ ID NO: 60 is set forth in SEQ ID NO: 61.
- hH01A a heavy chain in which leucine at positions 234 and 235 specified by EU index is replaced with alanine is designed.
- hH01A a heavy chain having the variable region of hH11 designed in Example 7-1-1, an IgG1 isotype, and a leucine at the 234th position and the 235th position specified by EU index substituted with alanine was prepared. It was designed (herein referred to as “hH11A”).
- Example 7 A heavy chain having the variable region of hH31 designed in 1-1, an IgG1 isotype, and the leucine at positions 234 and 235 specified by EU index was replaced with alanine was designed. (In the present specification, referred to as "hH31A").
- H01L02A antibody an antibody consisting of hH11A and hL02 is referred to as "H11L02A antibody” or "H11L02A”.
- H11L02A antibody An antibody consisting of hH31A and hL02 is referred to as "H31L02A antibody” or "H31L02A”.
- hH01A Heavy Chain Expression Vector The DNA fragments shown in nucleotide numbers 36 to 440 of the nucleotide sequence of hH01A shown in SEQ ID NO: 66 were synthesized (GENEART). Using the In-Fusion HD PCR cloning kit (Clontech), the hH01A expression vector was constructed by inserting the synthesized DNA fragment into the site where pCMA-G1LALA was cut with the restriction enzyme BlpI.
- hH31A Heavy Chain Expression Vector The DNA fragments shown in nucleotide numbers 36 to 440 in the nucleotide sequence of hH31A shown in SEQ ID NO: 70 were synthesized (GENEART). An hH31A expression vector was constructed in the same manner as in Example 7) -3-2.
- Example 7 -4 Preparation of binding affinity variant of humanized hG019 7) -4-1 Production of H01L02A, H11L02A, H31L02A Production was carried out in the same manner as in Example 4) -2-1. Using the light chain expression vector constructed in Example 5) -5-2-1 and the heavy chain expression vector constructed in Example 7) -3, the H chain and L chain shown in Example 7) -2 were prepared. H01L02A, H11L02A, and H31L02A were obtained by the combination of the H chain expression vector and the L chain expression vector corresponding to the combination.
- Example 8 In vitro evaluation of binding affinity variant of humanized hG019] 8) -1 H01L02A, H11L02A, H31L02A Binding Evaluation Evaluation of dissociation constant between H01L02A, H11L02A, H31L02A produced in Example 7-4 and human CDH6 was performed using Biacore T200 (manufactured by GE Healthcare Bioscience), The capture method was performed by capturing (capturing) an antigen as a ligand on an Anti-histidine antibody, which was immobilized using a His Capture Kit (manufactured by GE Healthcare Bioscience), and measuring the antibody as an analyte.
- CM5 (manufactured by GE Healthcare Bioscience) was used as a sensor chip, and 20 mM Tris-HCl, 150 mM NaCl, 1 mM CaCl 2 , 0.05% Surfactant P20, pH 7.4 was used as a running buffer. 1 ⁇ g / mL Recombinant Human Cadherin-6 (KCAD) / Fc Chimera (RD-SYSTEMS) was added on the chip at 10 ⁇ L / min for 60 seconds, and then diluted series solution of the antibody prepared in Example 7) -4. (11 to 81 ⁇ g / mL) was added at a flow rate of 30 ⁇ L / min for 180 seconds, and then the dissociation phase was monitored for 180 seconds.
- KCAD Human Cadherin-6
- RD-SYSTEMS Recombinant Human Cadherin-6
- Glycine 1.5 manufactured by GE Healthcare Bioscience was added at a flow rate of 20 ⁇ L / min for 30 seconds.
- a dissociation constant (KD) was calculated using a Steady State Affinity model for data analysis. The results are shown in Table 3.
- Example 9 Preparation of anti-LPS antibody for control
- the anti-LPS antibody was prepared with reference to WO2015 / 046505.
- the anti-LPS antibody used in this example has an isotype of IgG1 (also referred to as anti-LPS antibody in the present specification).
- the amino acid sequences of the light chain and heavy chain of the anti-LPS antibody used in this example are shown in SEQ ID NO: 72 and SEQ ID NO: 73.
- Step 1 Benzyl (6S) -6- (hydroxymethyl) -5-azaspiro [2.4] heptane-5-carboxylate (1-2) Lithium borohydride (500 mL) solution of 5-benzyl 6-methyl (6S) -5-azaspiro [2.4] heptane-5,6-dicarboxylate (1-1) (104 mmol, WO2012087596) in lithium borohydride ( 4.30 g, 178 mmol) was added portionwise at 0 ° C. After stirring at 0 ° C for 30 minutes, the mixture was stirred at room temperature for 2 hours.
- Step 2 Benzyl (6S) -6-( ⁇ [tert-butyl (dimethyl) silyl] oxy ⁇ methyl) -5-azaspiro [2.4] heptane-5-carboxylate (1-3)
- a solution of the compound (1-2) (27.9 g, 107 mmol) obtained in the above step 1 and imidazole (14.5 g, 214 mmol) in dichloromethane (300 mL) was added at room temperature to tert-butyldimethylsilyl chloride ( (24.2 g, 160 mmol) was added, and the mixture was stirred at room temperature for 18 hours.
- Step 3 (6S) -6-( ⁇ [tert-butyl (dimethyl) silyl] oxy ⁇ methyl) -5-azaspiro [2.4] heptane (1-4)
- a solution of the compound (1-3) (32.5 g, 86.5 mmol) obtained in Step 2 above in ethanol (400 mL) was added to a 7.5% palladium carbon catalyst (54% water, 5.00 g) at room temperature. ) was added, and the mixture was stirred at room temperature under a hydrogen atmosphere for 6 hours.
- the reaction solution was filtered through Celite, and the filtrate was evaporated under reduced pressure to obtain the desired product (1-4) (21.3 g, quantitative).
- Step 4 [(6S) -6-( ⁇ [tert-Butyl (dimethyl) silyl] oxy ⁇ methyl) -5-azaspiro [2.4] hept-5-yl] (5-methoxy-2-nitro-4 - ⁇ [Tri (propan-2-yl) silyl] oxy ⁇ phenyl) methanone (1-5) 5-Methoxy-2-nitro-4- ⁇ tri (propan-2-yl) silyl] oxy ⁇ benzoic acid (52.2 g, 141 mmol, US20110283262) and 1-hydroxybenzotriazole monohydrate (23.
- Step 5 (2-Amino-5-methoxy-4- ⁇ [tri (propan-2-yl) silyl] oxy ⁇ phenyl) [(6S) -6-( ⁇ [tert-butyl (dimethyl) silyl] oxy ⁇ Methyl) -5-azaspiro [2.4] hept-5-yl] methanone (1-6)
- ethanol 300 mL
- 7.5% palladium carbon 10.0 g
- the nitrogen balloon was immediately replaced with a hydrogen balloon and the reaction mixture was vigorously stirred at room temperature under hydrogen atmosphere.
- Step 6 N-[(prop-2-en-1-yloxy) carbonyl] -L-valyl-N- [4-( ⁇ [(2- ⁇ [(6S) -6-( ⁇ [tert-butyl ( Dimethyl) silyl] oxy ⁇ methyl) -5-azaspiro [2.4] hept-5-yl] carbonyl ⁇ -4-methoxy-5- ⁇ [tri (propan-2-yl) silyl] oxy ⁇ phenyl) carbamoyl] Oxy ⁇ methyl) phenyl] -L-alanine amide (1-7) A solution of the compound (1-6) (18.6 g, 33.0 mmol) obtained in the above Step 5 and triethylamine (6.26 mL, 45.2 mmol) in THF (300 mL) was added on an ethanol-ice bath.
- Step 7 N-[(prop-2-en-1-yloxy) carbonyl] -L-valyl-N- [4-( ⁇ [(2- ⁇ [(6S) -6- (hydroxymethyl) -5- Azaspiro [2.4] hept-5-yl] carbonyl ⁇ -4-methoxy-5- ⁇ [tri (propan-2-yl) silyl] oxy ⁇ phenyl) carbamoyl] oxy ⁇ methyl) phenyl] -L-alaninamide (1-8) Acetic acid (200 mL) was added to a solution of the compound (1-7) (23.5 g, 24.3 mmol) obtained in Step 6 above in tetrahydrofuran (50 mL), methanol (50 mL) and water (44 mL) at room temperature.
- Step 8 N-[(prop-2-en-1-yloxy) carbonyl] -L-valyl-N- ⁇ 4-[( ⁇ [(11a'S) -11'-hydroxy-7'-methoxy-5 '-Oxo-8'- ⁇ [tri (propan-2-yl) silyl] oxy ⁇ -11 ', 11a'-dihydro-1'H-spiro [cyclopropane-1,2'-pyrrolo [2,1- c] [1,4] benzodiazepine] -10 ′ (5′H) -yl] carbonyl ⁇ oxy) methyl] phenyl ⁇ -L-alanine amide (1-9) Oxalyl chloride (2.17 mL, 25.3 mmol) was slowly added dropwise to a solution of dimethyl sulfoxide (3.75 mL, 52.8 mmol) in dichloromethane (300 mL) at ⁇ 78 ° C.
- Step 9 N-[(prop-2-en-1-yloxy) carbonyl] -L-valyl-N- ⁇ 4-[( ⁇ [(11a'S) -11 '- ⁇ [tert-butyl (dimethyl)) Silyl] oxy ⁇ -7'-methoxy-5'-oxo-8 '- ⁇ [tri (propan-2-yl) silyl] oxy ⁇ -11', 11a'-dihydro-1'H-spiro [cyclopropane- 1,2'-pyrrolo [2,1-c] [1,4] benzodiazepine] -10 '(5'H) -yl] carbonyl ⁇ oxy) methyl] phenyl ⁇ -L-alaninamide (1-10) A solution of the compound (1-9) (12.0 g, 14.1 mmol) obtained in Step 8 above and 2,6-lutidine (6.58 mL, 56.5 mmol) in dichloromethane (200 mL) was charged with
- Step 10 N-[(prop-2-en-1-yloxy) carbonyl] -L-valyl-N- ⁇ 4-[( ⁇ [(11a'S) -11 '- ⁇ [tert-butyl (dimethyl)) Silyl] oxy ⁇ -8'-hydroxy-7'-methoxy-5'-oxo-11 ', 11a'-dihydro-1'H-spiro [cyclopropane-1,2'-pyrrolo [2,1-c] [1,4] Benzodiazepine] -10 '(5'H) -yl] carbonyl ⁇ oxy) methyl] phenyl ⁇ -L-alaninamide (1-11)
- a solution of the compound (1-10) (8.12 g, 8.42 mmol) obtained in Step 9 above in N, N-dimethylformamide (90 mL) and water (2 mL) was added with lithium acetate (0.611 g, 9.26 mmol).
- Step 1 N- [4- (11,12-didehydrodibenzo [b, f] azocin-5 (6H) -yl) -4-oxobutanoyl] glycylglycine
- a solution of glycylglycine (0.328 g, 2.49 mmol) and N, N-diisopropylethylamine (0.433 mL, 2.49 mmol) in N, N-dimethylformamide (20 mL) was added to 1- ⁇ [4- (11, 12-didehydrodibenzo [b, f] azocin-5 (6H) -yl) -4-oxobutanoyl] oxy ⁇ pyrrolidin-2,5-dione (2-1) (1.00 g, 2.49 mmol, Click Chemistry Tools) and water (10 mL) were added at room temperature, and the mixture was stirred overnight at the same temperature.
- Step 1 (2R, 11aS) -2- ⁇ [tert-butyl (dimethyl) silyl] oxy ⁇ -8-hydroxy-7-methoxy-10- ⁇ [2- (trimethylsilyl) ethoxy] methyl ⁇ -2,3- Dihydro-1H-pyrrolo [2,1-c] [1,4] benzodiazepine-5,11 (10H, 11aH) -dione (3-2) (2R, 11aS) -8- (Benzyloxy) -2- ⁇ [tert-butyl (dimethyl) silyl] oxy ⁇ -7-methoxy-10- ⁇ [2- (trimethylsilyl) ethoxy] methyl ⁇ -2,3- Tetrahydrofuran (150 mL) of dihydro-1H-pyrrolo [2,1-c] [1,4] benzodiazepine-5,11 (10H, 11aH) -dione (3-1) (25.5 g, 41.6 mmol, WO2016149546) After adding
- Step 2 (2R, 11aS) -8-[(5-Bromopentyl) oxy] -2- ⁇ [tert-butyl (dimethyl) silyl] oxy ⁇ -7-methoxy-10- ⁇ [2- (trimethylsilyl) ethoxy ] Methyl ⁇ -2,3-dihydro-1H-pyrrolo [2,1-c] [1,4] benzodiazepine-5,11 (10H, 11aH) -dione (3-3) To a solution of the compound (3-2) (10.8 g, 20.7 mmol) obtained in Step 1 above in N, N-dimethylformamide (30 mL) was added 1,5-dibromopentane (23.8 g, 103 mmol), Potassium carbonate (3.43 g, 24.8 mmol) was added at room temperature.
- Step 3 (2R, 11aS) -8-[(5-Bromopentyl) oxy] -2-hydroxy-7-methoxy-10- ⁇ [2- (trimethylsilyl) ethoxy] methyl ⁇ -2,3-dihydro-1H -Pyrrolo [2,1-c] [1,4] benzodiazepine-5,11 (10H, 11aH) -dione (3-4)
- a tetrahydrofuran (40 mL) solution of the compound (3-3) (21.5 mmol) obtained in the above step 2 1 mol / L tetrabutylammonium fluoride tetrahydrofuran solution (28.0 mL, 28.0 mmol) was added at 0 ° C.
- Step 4 (11aS) -8-[(5-Bromopentyl) oxy] -7-methoxy-10- ⁇ [2- (trimethylsilyl) ethoxy] methyl ⁇ -1H-pyrrolo [2,1-c] [1, 4] Benzodiazepine-2,5,11 (3H, 10H, 11aH) -trione (3-5)
- Compound (3-4) (11.3 g, 20.2 mmol) obtained in Step 3 above, tetrabutylammonium bromide (0.325 g, 1.01 mmol), potassium bromide (0.240 g, 2.02 mmol, ) was dissolved in a saturated aqueous solution of sodium hydrogen carbonate (60 mL) and dichloromethane (60 mL), and nor-AZADO (0.0279 g, 0.202 mmol) and sodium hypochlorite pentahydrate (2.03 g, 27.2 mmol) were dissolved.
- Step 5 (11aS) -8-[(5-Bromopentyl) oxy] -7-methoxy-5,11-dioxo-10- ⁇ [2- (trimethylsilyl) ethoxy] methyl ⁇ -5,10,11,11a -Tetrahydro-1H-pyrrolo [2,1-c] [1,4] benzodiazepin-2-yl trifluoromethanesulfonate (3-6) 2,6-lutidine (8.17 mL, 70.1 mmol) was added to a solution of the compound (3-5) (9.74 g, 17.5 mmol) obtained in Step 4 above in dichloromethane (160 mL) at -40 ° C.
- Step 6 (11aS) -8-[(5-Bromopentyl) oxy] -7-methoxy-2- (4-methoxyphenyl) -10- ⁇ [2- (trimethylsilyl) ethoxy] methyl ⁇ -1H-pyrrolo [ 2,1-c] [1,4] benzodiazepine-5,11 (10H, 11aH) -dione (3-7)
- Compound (3-6) (2.00 g, 2.91 mmol) obtained in Step 5 above, 4-methoxyphenylboronic acid (0.884 g, 5.82 mmol), tetrakis (triphenylphosphine) palladium (0) Toluene (20 mL), ethanol (10 mL), and water (10 mL) were added to a mixture of (0.336 g, 0.291 mmol) and sodium carbonate (1.23 g, 11.6 mmol) at room temperature.
- Step 7 (11aS) -8-[(5-Bromopentyl) oxy] -7-methoxy-2- (4-methoxyphenyl) -1,11a-dihydro-5H-pyrrolo [2,1-c] [1 , 4] Benzodiazepin-5-one (3-8)
- the compound (3-7) (0.789 g, 1.22 mmol) obtained in the above Step 6 was dissolved in ethanol (10 mL) and tetrahydrofuran (10 mL), and a 2.0 M lithium borohydride tetrahydrofuran solution (6. 11 mL, 12.2 mmol) was added at 0 ° C., and the mixture was stirred at 0 ° C. for 3 hours.
- Step 8 (11aS) -8-[(5-Bromopentyl) oxy] -7-methoxy-2- (4-methoxyphenyl) -1,10,11,11a-tetrahydro-5H-pyrrolo [2,1- c] [1,4] benzodiazepin-5-one (3-9)
- Sodium triacetoxyborohydride (0.421 g, 1.99 mmol) was added to a solution of the compound (3-8) (0.496 g, 0.992 mmol) obtained in Step 7 above in dichloromethane (20 mL) at 0 ° C. It was After stirring at room temperature for 2 hours, saturated aqueous sodium hydrogen carbonate solution was added, and the mixture was extracted with chloroform.
- Step 9 Prop-2-en-1-yl (11aS) -8-[(5-bromopentyl) oxy] -7-methoxy-2- (4-methoxyphenyl) -5-oxo-11,11a-dihydro -1H-Pyrrolo [2,1-c] [1,4] benzodiazepine-10 (5H) -carboxylate (3-10)
- a dichloromethane (30 mL) solution of the compound (3-9) (0.426 g, 0.849 mmol) obtained in the above step 8 pyridine (0.102 mL1.27 mmol) and allyl chloroformate (0.374 mL, 3 0.54 mmol) was added at 0 ° C., and the mixture was stirred at 0 ° C.
- Step 10 N-[(prop-2-en-1-yloxy) carbonyl] -L-valyl-N- ⁇ 4-[( ⁇ [(11a'S) -11 '- ⁇ [tert-butyl (dimethyl)) Silyl] oxy ⁇ -7'-methoxy-8 '- ⁇ [5-( ⁇ (11aS) -7-methoxy-2- (4-methoxyphenyl) -5-oxo-10-[(prop-2-ene- 1-yloxy) carbonyl] -5,10,11,11a-tetrahydro-1H-pyrrolo [2,1-c] [1,4] benzodiazepin-8-yl ⁇ oxy) pentyl] oxy ⁇ -5′-oxo- 11 ', 11a'-Dihydro-1'H-spiro [cyclopropane-1,2'-pyrrolo [2,1-c] [1,4] benzodiazepine] -10'(5'H) -
- Step 11 N-[(prop-2-en-1-yloxy) carbonyl] -L-valyl-N- ⁇ 4-[( ⁇ [(11a'S) -11'-hydroxy-7'-methoxy-8] '- ⁇ [5-( ⁇ (11aS) -7-methoxy-2- (4-methoxyphenyl) -5-oxo-10-[(prop-2-en-1-yloxy) carbonyl] -5,10, 11,11a-Tetrahydro-1H-pyrrolo [2,1-c] [1,4] benzodiazepin-8-yl ⁇ oxy) pentyl] oxy ⁇ -5′-oxo-11 ′, 11a′-dihydro-1′H -Spiro [cyclopropane-1,2'-pyrrolo [2,1-c] [1,4] benzodiazepine] -10 '(5'H) -yl] carbonyl ⁇ oxy) methyl] phenyl ⁇ -L-
- Step 12 L-valyl-N- ⁇ 4-[( ⁇ [(11a'S) -11'-hydroxy-7'-methoxy-8 '-[(5- ⁇ [(11aS) -7-methoxy-2 -(4-Methoxyphenyl) -5-oxo-5,10,11,11a-tetrahydro-1H-pyrrolo [2,1-c] [1,4] benzodiazepin-8-yl] oxy ⁇ pentyl) oxy]- 5'-oxo-11 ', 11a'-dihydro-1'H-spiro [cyclopropane-1,2'-pyrrolo [2,1-c] [1,4] benzodiazepine] -10'(5'H) -Yl] carbonyl ⁇ oxy) methyl] phenyl ⁇ -L-alanine amide (3-13) To a solution of the compound (3-12) (0.140 mmol) obtained in Step 11 above in dichloromethane (2 m
- Step 13 N- [4- (11,12-didehydrodibenzo [b, f] azocin-5 (6H) -yl) -4-oxobutanoyl] glycylglycyl-L-valyl-N- ⁇ 4-[( ⁇ [(11a'S) -11'-hydroxy-7'-methoxy-8 '-[(5- ⁇ [(11aS) -7-methoxy-2- (4-methoxyphenyl) -5-oxo-5,5 10,11,11a-Tetrahydro-1H-pyrrolo [2,1-c] [1,4] benzodiazepin-8-yl] oxy ⁇ pentyl) oxy] -5′-oxo-11 ′, 11a′-dihydro-1 'H-spiro [cyclopropane-1,2'-pyrrolo [2,1-c] [1,4] benzodiazepine] -10'(5'H) -
- Step 1 (2R, 11aS) -8- (3-Bromopropoxy) -2- ⁇ [tert-butyl (dimethyl) silyl] oxy ⁇ -7-methoxy-10- ⁇ [2- (trimethylsilyl) ethoxy] methyl ⁇ -2,3-Dihydro-1H-pyrrolo [2,1-c] [1,4] benzodiazepine-5,11 (10H, 11aH) -dione (4-1)
- Example 10-3 The compound (3-2) (5.06 g, 9.67 mmol) obtained in Step 1 and 1,3-dibromopropane (4.93 mL, 48.4 mmol) were used in Example 10-3.
- Step 2 (2R, 11aS) -8- (3-Bromopropoxy) -2-hydroxy-7-methoxy-10- ⁇ [2- (trimethylsilyl) ethoxy] methyl ⁇ -2,3-dihydro-1H-pyrrolo [ 2,1-c] [1,4] benzodiazepine-5,11 (10H, 11aH) -dione (4-2)
- the compound (4-1) (4.85 g, 7.54 mmol) obtained in Step 1 above was reacted in the same manner as in Step 3 of Example 10-3 to give the desired product (4-2) (4.05 g, Quantitative).
- Step 3 (11aS) -8- (3-Bromopropoxy) -7-methoxy-10- ⁇ [2- (trimethylsilyl) ethoxy] methyl ⁇ -1H-pyrrolo [2,1-c] [1,4] benzodiazepine -2,5,11 (3H, 10H, 11aH) -trione (4-3)
- the compound (4-2) (7.54 mmol) obtained in Step 2 above was reacted in the same manner as in Step 4 of Example 10-3 to give the object product (4-3) (3.73 g, 93%). Obtained.
- Step 4 (11aS) -8- (3-Bromopropoxy) -7-methoxy-5,11-dioxo-10- ⁇ [2- (trimethylsilyl) ethoxy] methyl ⁇ -5,10,11,11a-tetrahydro- 1H-pyrrolo [2,1-c] [1,4] benzodiazepin-2-yl trifluoromethanesulfonate (4-4)
- the compound (4-3) (3.73 g, 7.08 mmol) obtained in Step 3 above was reacted in the same manner as in Step 5 of Example 10-3 to give the desired product (4-4) (3.27 g, 70%).
- Step 5 (11aS) -8- (3-Bromopropoxy) -7-methoxy-2- (4-methoxyphenyl-10- ⁇ [2- (trimethylsilyl) ethoxy] methyl ⁇ -1H-pyrrolo [2,1- c] [1,4] benzodiazepine-5,11 (10H, 11aH) -dione (4-5)
- Compound (4-4) (3.27 g, 4.96 mmol) obtained in Step 4 above was reacted in the same manner as in Step 6 of Example 10-3 to give the desired product (4-5) (2.49 g, 81%).
- Step 6 (11aS) -8- (3-Bromopropoxy) -7-methoxy-2- (4-methoxyphenyl) -1,11a-dihydro-5H-pyrrolo [2,1-c] [1,4] Benzodiazepin-5-one (4-6)
- the compound (4-5) (2.49 g, 4.04 mmol) obtained in Step 5 above was reacted in the same manner as in Step 7 of Example 10-3 to give the desired product (4-6) (1.59 g, 84%).
- Step 7 (11aS) -8- (3-Bromopropoxy) -7-methoxy-2- (4-methoxyphenyl) -1,10,11,11a-tetrahydro-5H-pyrrolo [2,1-c] [ 1,4] Benzodiazepin-5-one (4-7)
- the compound (4-6) (1.59 g, 3.38 mmol) obtained in Step 6 above was reacted in the same manner as in Step 8 of Example 10-3 to give the desired product (4-7) (1.39 g, 87%).
- 1H-NMR (CDCl3) ⁇ : 7.54 (1H, s), 7.54-7.51 (1H, m), 7.32-7.29 (2H, m), 6.89-6.87.
- Step 8 Prop-2-en-1-yl (11aS) -8- (3-bromopropoxy) -7-methoxy-2- (4-methoxyphenyl) -5-oxo-11,11a-dihydro-1H- Pyrrolo [2,1-c] [1,4] benzodiazepine-10 (5H) -carboxylate (4-8)
- the compound (4-7) (1.40 g, 0.2.95 mmol) obtained in the above Step 7 was reacted in the same manner as in Step 9 of Example 10-3 to give the desired product (4-8) (0. 885 g, 54%) was obtained.
- Step 9 N- ⁇ [(prop-2-en-1-yl) oxy] carbonyl ⁇ -L-valyl-N- [4-( ⁇ [(11'aS) -11 '- ⁇ [tert-butyl ( Dimethyl) silyl] oxy ⁇ -7'-methoxy-8 '-(3- ⁇ [(11aS) -7-methoxy-2- (4-methoxyphenyl) -5-oxo-10- ⁇ [(prop-2- En-1-yl) oxy] carbonyl ⁇ -5,10,11,11a-tetrahydro-1H-pyrrolo [2,1-c] [1,4] benzodiazepin-8-yl] oxy ⁇ propoxy) -5′- Oxo-11 ′, 11′a-dihydro-1′H, 3′H-spiro [cyclopropane-1,2′-pyrrolo [2,1-c] [1,4] benzodiazepine] -10 ′ (5 ′ H) -Carbon
- Step 10 N- ⁇ [(prop-2-en-1-yl) oxy] carbonyl ⁇ -L-valyl-N- [4-( ⁇ [(11'aS) -11'-hydroxy-7'-methoxy -8 '-(3- ⁇ [(11aS) -7-methoxy-2- (4-methoxyphenyl) -5-oxo-10- ⁇ [(prop-2-en-1-yl) oxy] carbonyl ⁇ - 5,10,11,11a-Tetrahydro-1H-pyrrolo [2,1-c] [1,4] benzodiazepin-8-yl] oxy ⁇ propoxy) -5′-oxo-11 ′, 11′a-dihydro- 1'H, 3'H-spiro [cyclopropane-1,2'-pyrrolo [2,1-c] [1,4] benzodiazepine] -10 '(5'H) -carbonyl] oxy ⁇ methyl) phenyl] -L-a
- Step 11 L-valyl-N- [4-( ⁇ [(11'aS) -11'-hydroxy-7'-methoxy-8 '-(3- ⁇ [(11aS) -7-methoxy-2- ( 4-Methoxyphenyl) -5-oxo-5,10,11,11a-tetrahydro-1H-pyrrolo [2,1-c] [1,4] benzodiazepin-8-yl] oxy ⁇ propoxy) -5′-oxo -11 ', 11'a-Dihydro-1'H, 3'H-spiro [cyclopropane-1,2'-pyrrolo [2,1-c] [1,4] benzodiazepine] -10'(5'H ) -Carbonyl] oxy ⁇ methyl) phenyl] -L-alanine amide (4-11)
- the compound (4-10) (0.0571 mmol) obtained in the above Step 10 was reacted in the same manner as in Step 12 of Example 10-3 to
- Step 12 N- [4- (11,12-didehydrodibenzo [b, f] azocin-5 (6H) -yl) -4-oxobutanoyl] glycylglycyl-L-valyl-N- [4-( ⁇ [(11'aS) -11'-hydroxy-7'-methoxy-8 '-(3- ⁇ [(11aS) -7-methoxy-2- (4-methoxyphenyl) -5-oxo-5,10, 11,11a-Tetrahydro-1H-pyrrolo [2,1-c] [1,4] benzodiazepin-8-yl] oxy ⁇ propoxy) -5′-oxo-11 ′, 11′a-dihydro-1′H, 3'H-spiro [cyclopropane-1,2'-pyrrolo [2,1-c] [1,4] benzodiazepine] -10 '(5'H) -carbonyl] oxy
- Step 1 Dimethyl (6S, 6'S) -5,5 '- ⁇ 1,5-pentanediylbis [oxy (5-methoxy-2-nitrobenzene-4,1-diyl) carbonyl] ⁇ bis (5-azaspiro [2.4] Heptane-6-carboxylate) (5-2) 4,4 ′-[1,5-Pentanediylbis (oxy)] bis (5-methoxy-2-nitrobenzoic acid) (5-1) (5.41 g, 10.9 mmol, Journal of Medicinal Chemistry 2004, 47) , 1161) in dichloromethane (50 mL) was added with oxalyl chloride (5.63 mL, 65.7 mmol) at 0 ° C., and N, N-dimethylformamide (0.0844 mL, 1.09 mmol) was added dropwise.
- Step 2 ⁇ 1,5-Pentanediylbis [oxy (5-methoxy-2-nitrobenzene-4,1-diyl)] ⁇ bis ⁇ [(6S) -6- (hydroxymethyl) -5-azaspiro [2. 4] Hept-5-yl] methanone ⁇ (5-3)
- Lithium borohydride (714 mg, 32.8 mmol) was added to a solution of the compound (5-2) (8.40 g, 10.9 mmol) obtained in Step 1 above in tetrahydrofuran (100 mL), and the mixture was added at 0 ° C. The mixture was stirred for 30 minutes, warmed to room temperature and stirred for 1 hour.
- Step 3 Pentane-1,5-diylbis [oxy (5-methoxy-2-nitrobenzene-4,1-diyl) carbonyl (6S) -5-azaspiro [2.4] heptane-5,6-diylmethanediyl] Diazetate (5-4)
- the compound (5-3) (7.70 g, 10.8 mmol) obtained in Step 2 above was dissolved in pyridine (20 mL) and acetic anhydride (10 mL, 105.9 mmol), and the mixture was stirred at room temperature. Evaporation under reduced pressure gave the desired product (5-4) (8.38 g, 97%).
- Step 4 1,5-Pentanediylbis [oxy (2-amino-5-methoxybenzene-4,1-diyl) carbonyl (6S) -5-azaspiro [2.4] heptane-5,6-diylmethanediyl ] Diacetate (5-5)
- N-dimethylformamide 100 mL
- 5% palladium carbon 54% water, 1.00 g
- Step 5 ⁇ (6S) -5- [4-( ⁇ 5- [4-( ⁇ (6S) -6-[(acetyloxy) methyl] -5-azaspiro [2.4] hept-5-yl] ⁇ Carbonyl) -5-amino-2-methoxyphenoxy] pentyl ⁇ oxy) -5-methoxy-2- ⁇ [(prop-2-en-1-yloxy) carbonyl] amino ⁇ benzoyl] -5-azaspiro [2.4 ] Hept-6-yl ⁇ methyl acetate (monoallyloxycarbonyl derivative) (5-6) Pyridine (1.10 mL, 13.7 mmol) was added to a solution of the compound (5-5) (5.05 g, 6.85 mmol) obtained in Step 4 above in dichloromethane (100 mL), and under a nitrogen atmosphere, -78 Allyl chloroformate (0.725 mL, 6.85 mmol) was added at 0 ° C, and the mixture
- Pentane-1,5-diylbis [oxy (5-methoxy-2- ⁇ [(prop-2-en-1-yloxy) carbonyl] amino ⁇ benzene-4,1-diyl) carbonyl (6S) -5-azaspiro [ 2.4] Heptane-5,6-diylmethanediyl] diacetate (bisallyloxycarbonyl derivative) (5-6b): 1H-NMR (DMSO-D6) ⁇ : 9.14 (2H, s), 7.14 (2H, s), 6.85 (2H, s), 5.94 (2H, m), 5.33 ( 2H, m), 5.21 (2H, m), 4.55 (4H, m), 4.47 (1H, s), 4.23 (3H, s), 3.96 (4H, m), 3.74 (6H, s), 3.34 (6H, s), 3.31 (2H, m), 3.21 (2H, m), 2.04 (6H, s), 1.79 (4H) , M), 1.
- Step 6 N-[(2-propen-1-yloxy) carbonyl] -L-valyl-N- ⁇ 4-[( ⁇ [2-( ⁇ (6S) -6-[(acetyloxy) methyl] -5] -Azaspiro [2.4] hept-5-yl ⁇ carbonyl) -5-( ⁇ 5- [4-( ⁇ (6S) -6-[(acetyloxy) methyl] -5-azaspiro [2.4] hept -5-yl ⁇ carbonyl) -2-methoxy-5- ⁇ [(2-propen-1-yloxy) carbonyl] amino ⁇ phenoxy] pentyl ⁇ oxy) -4-methoxyphenyl] carbamoyl ⁇ oxy) methyl] phenyl ⁇ - L-alanine amide (5-7) Monoallyloxycarbonyl compound (5-6) (2.00 g, 2.44 mmol) obtained in Step 5 above and N-[(prop-2-en-1-yloxy)
- Step 7 N-[(2-propen-1-yloxy) carbonyl] -L-valyl-N- [4-( ⁇ [(2- ⁇ [(6S) -6- (hydroxymethyl) -5-azaspiro [ 2.4] Hept-5-yl] carbonyl ⁇ -5- ⁇ [5- (4- ⁇ [(6S) -6- (hydroxymethyl) -5-azaspiro [2.4] hept-5-yl] carbonyl ⁇ -2-Methoxy-5- ⁇ [(2-propen-1-yloxy) carbonyl] amino ⁇ phenoxy) pentyl] oxy ⁇ -4-methoxyphenyl) carbamoyl] oxy ⁇ methyl) phenyl] -L-alaninamide (5 -8) Potassium carbonate (1.49 g, 10.8 mmol) was added to a solution of the compound (5-7) (2.64 g, 2.16 mmol) obtained in Step 6 above in methanol (10 mL), and the mixture was stir
- Step 8 N-[(2-propen-1-yloxy) carbonyl] -L-valyl-N- ⁇ 4-[( ⁇ [(11a'S) -11'-hydroxy-8 '- ⁇ [5- ( ⁇ (11a'S) -11'-hydroxy-7'-methoxy-5'-oxo-10 '-[(2-propen-1-yloxy) carbonyl] -5', 10 ', 11', 11a'- Tetrahydro-1'H-spiro [cyclopropane-1,2'-pyrrolo [2,1-c] [1,4] benzodiazepine] -8'-yl ⁇ oxy) pentyl] oxy ⁇ -7'-methoxy-5 '-Oxo-11', 11a'-dihydro-1'H-spiro [cyclopropane-1,2'-pyrrolo [2,1-c] [1,4] benzodiazepine] -10 '(5'H)- Il] carbonyl
- Step 9 L-valyl-N- ⁇ 4-[( ⁇ [(11a'S) -11'-hydroxy-7'-methoxy-8 '-[(5- ⁇ [(11a'S) -7'- Methoxy-5'-oxo-5 ', 11a'-dihydro-1'H-spiro [cyclopropane-1,2'-pyrrolo [2,1-c] [1,4] benzodiazepine] -8'-yl] Oxy ⁇ pentyl) oxy] -5′-oxo-11 ′, 11a′-dihydro-1′H-spiro [cyclopropane-1,2′-pyrrolo [2,1-c] [1,4] benzodiazepine]- 10 '(5'H) -yl] carbonyl ⁇ oxy) methyl] phenyl ⁇ -L-alanine amide (5-10)
- the compound (5-9) (2.05 g, 1.80 mmol) obtained in the above Step
- Step 10 N- [4- (11,12-didehydrodibenzo [b, f] azocin-5 (6H) -yl) -4-oxobutanoyl] glycylglycyl-L-valyl-N- ⁇ 4-[( ⁇ [(11a'S) -11'-hydroxy-7'-methoxy-8 '-[(5- ⁇ [(11a'S) -7'-methoxy-5'-oxo-5', 11a'-dihydro -1'H-spiro [cyclopropane-1,2'-pyrrolo [2,1-c] [1,4] benzodiazepine] -8'-yl] oxy ⁇ pentyl) oxy] -5'-oxo-11 ' , 11a′-Dihydro-1′H-spiro [cyclopropane-1,2′-pyrrolo [2,1-c] [1,4] benzodiazepine] -10
- Step 1 Methyl (6S) -5- [4- (benzyloxy) -5-methoxy-2-nitrobenzoyl] -5-azaspiro [2.4] heptane-6-carboxylate (6-2) 4- (benzyloxy) -5-methoxy-2-nitrobenzoic acid (6-1) (6.07 g, 20.0 mmol, Tetrahedron 1995, 51, 5617), N, N-dimethylformamide (1.08 mL, 13) Oxalyl chloride (3.43 mL, 40.0 mmol) was added dropwise to a dichloromethane (100 mL) solution of (0.9 mmol) under ice cooling over 5 minutes.
- the reaction solution was stirred at room temperature for 5 hours and then evaporated under reduced pressure.
- the obtained residue was dissolved in dichloromethane (20 mL) and evaporated under reduced pressure. After repeating this operation 3 times, the residue was suspended in dichloromethane (5 mL), excess diethyl ether and hexane were added thereto, filtered, and dried under reduced pressure to obtain crude acid chloride.
- the obtained acid chloride was dissolved in dichloromethane, cooled to -40 ° C (dry ice-acetonitrile bath), and methyl (6S) -5-azaspiro [2.4] heptane-6-carboxylate hydrochloride (4.22 g) was added.
- Step 2 (11a'S) -8 '-(benzyloxy) -7'-methoxy-1'H-spiro [cyclopropane-1,2'-pyrrolo [2,1-c] [1,4] benzodiazepine ] -5 ', 11'(10'H,11a'H) -dione (6-3)
- Raney nickel (7.00 g) was added to a solution of the compound (6-2) (6.55 g, 16.0 mmol) obtained in Step 1 above in ethanol (150 mL) and tetrahydrofuran (150 mL) under a nitrogen atmosphere. Hydrazine monohydrate (7 mL) was added to the reaction mixture, and the temperature was gradually raised to 50 ° C.
- Step 3 (11a'S) -8 '-(benzyloxy) -7'-methoxy-10'- ⁇ [2- (trimethylsilyl) ethoxy] methyl ⁇ -1'H-spiro [cyclopropane-1,2 ' -Pyrrolo [2,1-c] [1,4] benzodiazepine] -5 ', 11'(10'H,11a'H) -dione (6-4) A solution of the compound (6-3) (10.0 g, 26.4 mmol) obtained in the above step 2 in tetrahydrofuran (150 mL) at ⁇ 40 ° C.
- Step 4 (11a'S) -8'-hydroxy-7'-methoxy-10 '- ⁇ [2- (trimethylsilyl) ethoxy] methyl ⁇ -1'H-spiro [cyclopropane-1,2'-pyrrolo [ 2,1-c] [1,4] benzodiazepine] -5 ′, 11 ′ (10′H, 11a′H) -dione (6-5)
- a solution of the compound (6-4) (18.7 g, 36.8 mmol) obtained in the above step 3 in terorahydrofuran (50 mL) and ethanol (100 mL) was added to a 5% palladium carbon catalyst (5%) under a nitrogen atmosphere. 0.00g) was added.
- Step 5 (11a'S) -8 '-[(5-Bromopentyl) oxy] -7'-methoxy-10'- ⁇ [2- (trimethylsilyl) ethoxy] methyl ⁇ -1'H-spiro [cyclopropane -1,2'-Pyrrolo [2,1-c] [1,4] benzodiazepine] -5 ', 11'(10'H,11a'H) -dione (6-6)
- the compound (6-5) (2.77 g, 6.62 mmol) obtained from the compound obtained in the above Step 4 was reacted in the same manner as in Step 2 of Example 10-3 to give the desired product (6-6). ) (3.31 g, 88%).
- Step 6 (11a'S) -8 '-[(5-Bromopentyl) oxy] -7'-methoxy-1', 11a'-dihydro-5'H-spiro [cyclopropane-1,2'-pyrrolo [2,1-c] [1,4] benzodiazepine] -5'-one (6-7)
- the compound (6-6) (3.31 g, 5.83 mmol) obtained in Step 5 above was reacted in the same manner as in Step 7 of Example 10-3 to give the desired product (6-7) (1.11 g, 45%).
- Step 7 (11a ′S) -8 ′-[(5-bromopentyl) oxy] -7′-methoxy-1 ′, 10 ′, 11 ′, 11a′-tetrahydro-5′H-spiro [cyclopropane- 1,2'-pyrrolo [2,1-c] [1,4] benzodiazepine] -5'-one (6-8)
- the compound (6-7) (2.56 g, 6.08 mmol) obtained in Step 6 above was reacted in the same manner as in Step 8 of Example 10-3 to give the desired product (6-8) (1.15 g, 45%).
- Step 8 Prop-2-en-1-yl (11a ′S) -8 ′-[(5-bromopentyl) oxy] -7′-methoxy-5′-oxo-11 ′, 11a′-dihydro-1 'H-spiro [cyclopropane-1,2'-pyrrolo [2,1-c] [1,4] benzodiazepine] -10'(5'H) -carboxylate (6-9)
- the compound (6-8) (1.15 g, 2.72 mmol) obtained in Step 7 above was reacted in the same manner as in Step 9 of Example 10-3 to give the desired product (6-9) (1.14 g, 82%).
- Step 9 N-[(prop-2-en-1-yloxy) carbonyl] -L-valyl-N- ⁇ 4-[( ⁇ [(11a'S) -11 '- ⁇ [tert-butyl (dimethyl)) Silyl] oxy ⁇ -7'-methoxy-8 '- ⁇ [5-( ⁇ (11a'S) -7'-methoxy-5'-oxo-10'-[(prop-2-en-1-yloxy) Carbonyl] -5 ', 10', 11 ', 11a'-tetrahydro'H-spiro [cyclopropane-1,2'-pyrrolo [2,1-c] [1,4] benzodiazepine] -8'-yl ⁇ (Oxy) pentyl] oxy ⁇ -5'-oxo-11 ', 11a'-dihydro-1'H-spiro [cyclopropane-1,2'-pyrrolo [2,1-c] [1,4]
- Step 10 N-[(prop-2-en-1-yloxy) carbonyl] -L-valyl-N- ⁇ 4-[( ⁇ [(11a'S) -11'-hydroxy-7'-methoxy-8] '- ⁇ [5-( ⁇ (11a'S) -7'-methoxy-5'-oxo-10'-[(prop-2-en-1-yloxy) carbonyl] -5 ', 10', 11 ' , 11a′-Tetrahydro-1′H-spiro [cyclopropane-1,2′-pyrrolo [2,1-c] [1,4] benzodiazepine] -8′-yl ⁇ oxy) pentyl] oxy ⁇ -5 ′ -Oxo-11 ', 11a'-dihydro-1'H-spiro [cyclopropane-1,2'-pyrrolo [2,1-c] [1,4] benzodiazepine] -10'(5'H) -yl
- Step 11 L-valyl-N- ⁇ 4-[( ⁇ [(11a'S) -11'-hydroxy-7'-methoxy-8 '-[(5- ⁇ [(11a'S) -7'- Methoxy-5'-oxo-5 ', 10', 11 ', 11a'-tetrahydro-1'H-spiro [cyclopropane-1,2'-pyrrolo [2,1-c] [1,4] benzodiazepines] -8'-yl] oxy ⁇ pentyl) oxy] -5'-oxo-11 ', 11a'-dihydro-1'H-spiro [cyclopropane-1,2'-pyrrolo [2,1-c] [1 , 4] Benzodiazepine] -10 ′ (5′H) -yl] carbonyl ⁇ oxy) methyl] phenyl ⁇ -L-alaninamide (6-12) The compound (6-11) (0.382 g, 0.341 m
- Step 12 N- [4- (11,12-didehydrodibenzo [b, f] azocin-5 (6H) -yl) -4-oxobutanoyl] glycylglycyl-L-valyl-N- ⁇ 4-[( ⁇ [(11a'S) -11'-hydroxy-7'-methoxy-8 '-[(5- ⁇ [(11a'S) -7'-methoxy-5'-oxo-5', 10 ', 11 ', 11a'-Tetrahydro-1'H-spiro [cyclopropane-1,2'-pyrrolo [2,1-c] [1,4] benzodiazepine] -8'-yl] oxy ⁇ pentyl) oxy] -5 '-Oxo-11', 11a'-dihydro-1'H-spiro [cyclopropane-1,2'-pyrrolo [2,1-c] [1,4] benz
- Step 1 Prop-2-en-1-yl (2- ⁇ [(6S) -6-( ⁇ [tert-butyl (dimethyl) silyl] oxy ⁇ methyl) -5-azaspiro [2.4] hept-5 -Yl] carbonyl ⁇ -4-methoxy-5- ⁇ [tri (propan-2-yl) silyl] oxy ⁇ phenyl) carbamate (7-1)
- the compound (1-6) (4.59 g, 8.15 mmol) obtained in Step 5 of Example 1 was reacted in the same manner as in Step 9 of Example 10-3 to give the desired product (7-1) (4. 86 g, 92%) was obtained.
- Step 2 Prop-2-en-1-yl (2- ⁇ [(6S) -6- (hydroxymethyl) -5-azaspiro [2.4] hept-5-yl] carbonyl ⁇ -4-methoxy-5 - ⁇ [Tri (propan-2-yl) silyl] oxy ⁇ phenyl) carbamate (7-2)
- the compound (7-1) (4.86 g, 7.51 mmol) obtained in the above step 1 was reacted in the same manner as in step 10 of Example 10-1 to obtain the desired product (7-2) (3.42 g, 86%).
- 1H-NMR (CDCl3) ⁇ : 8.52 (1H, s), 7.71 (1H, s), 6.77 (1H, s), 6.00-5.94 (1H, m), 5.
- Step 3 Prop-2-en-1-yl (11a ′S) -11′-hydroxy-7′-methoxy-5′-oxo-8 ′- ⁇ [tri (propan-2-yl) silyl] oxy ⁇ -11 ', 11a'-Dihydro-1'H-spiro [cyclopropane-1,2'-pyrrolo [2,1-c] [1,4] benzodiazepine] -10'(5'H) -carboxylate ( 7-3)
- the compound (7-2) (6.68 g, 12.5 mmol) obtained in the above Step 2 was reacted in the same manner as in Step 8 of Example 10-1 to obtain the desired product (7-3) (6.44 g, 97%).
- Step 4 Prop-2-en-1-yl (11a ′S) -11 ′- ⁇ [tert-butyl (dimethyl) silyl] oxy ⁇ -7′-methoxy-5′-oxo-8 ′- ⁇ [tri (Propan-2-yl) silyl] oxy ⁇ -11 ', 11a'-dihydro-1'H-spiro [cyclopropane-1,2'-pyrrolo [2,1-c] [1,4] benzodiazepine]- 10 '(5'H) -carboxylate (7-4)
- the compound (7-3) (3.24 g, 6.10 mmol) obtained in Step 3 above was reacted in the same manner as in Step 9 of Example 10-1 to give the desired product (7-4) (3.86 g, 98%).
- Step 5 Prop-2-en-1-yl (11a ′S) -11 ′- ⁇ [tert-butyl (dimethyl) silyl] oxy ⁇ -8′-hydroxy-7′-methoxy-5′-oxo-11 ', 11a'-Dihydro-1'H-spiro [cyclopropane-1,2'-pyrrolo [2,1-c] [1,4] benzodiazepine] -10'(5'H) -carboxylate (7- 5)
- the compound (7-4) (4.49 g, 6.96 mmol) obtained in the above Step 4 was reacted in the same manner as in Step 10 of Example 10-1 to obtain the desired product (7-5) (3.24 g, 95%).
- Step 6 Prop-2-en-1-yl (11a ′S) -11 ′- ⁇ [tert-butyl (dimethyl) silyl] oxy ⁇ -7′-methoxy-8 ′- ⁇ [5-( ⁇ (11aS ) -7-Methoxy-2- (4-methoxyphenyl) -5-oxo-10-[(prop-2-en-1-yloxy) carbonyl] -5,10,11,11a-tetrahydro-1H-pyrrolo [ 2,1-c] [1,4] benzodiazepin-8-yl ⁇ oxy) pentyl] oxy ⁇ -5′-oxo-11 ′, 11a′-dihydro-1′H-spiro [cyclopropane-1,2 ′ -Pyrrolo [2,1-c] [1,4] benzodiazepine] -10 '(5'H) -carboxylate (7-6) Compound (7-5) (0.080 g, 0.164 mmol)
- Step 7 Prop-2-en-1-yl (11a ′S) -11′-hydroxy-7′-methoxy-8 ′- ⁇ [5-( ⁇ (11aS) -7-methoxy-2- (4- Methoxyphenyl) -5-oxo-10-[(prop-2-en-1-yloxy) carbonyl] -5,10,11,11a-tetrahydro-1H-pyrrolo [2,1-c] [1,4] Benzodiazepin-8-yl ⁇ oxy) pentyl] oxy ⁇ -5′-oxo-11 ′, 11a′-dihydro-1′H-spiro [cyclopropane-1,2′-pyrrolo [2,1-c] [1 , 4] Benzodiazepine] -10 '(5'H) -carboxylate (7-7)
- the compound (7-6) 160 mg, 0.161 mmol
- obtained in the above Step 6 was reacted in the same manner as in Step 11 of Example 10-3 to
- Step 8 (11a'S) -7'-methoxy-8 '-[(5- ⁇ [(11aS) -7-methoxy-2- (4-methoxyphenyl) -5-oxo-5,10,11, 11a-Tetrahydro-1H-pyrrolo [2,1-c] [1,4] benzodiazepin-8-yl] oxy ⁇ pentyl) oxy] -1 ′, 11a′-dihydro-5′H-spiro [cyclopropane-1 , 2'-Pyrrolo [2,1-c] [1,4] benzodiazepine] -5'-one (7-8)
- the compound (7-7) (141 mg, 0.161 mmol) obtained in the above Step 7 was reacted in the same manner as in Step 12 of Example 10-3 to give the desired product (7-8) (109.8 mg, 99%).
- Step 1 [4- (benzyl) -5-methoxy-2-nitrophenyl] [(6S) -6- (hydroxymethyl) -5-azaspiro [2.4] hept-5-yl] methanone (8-1 )
- Example 6 A solution of the compound (6-2) (6.49 g, 14.7 mmol) obtained in Step 1 in tetrahydrofuran (147 mL) was charged with lithium borohydride (0.642 g, 29.5 mmol) at 0 ° C. In addition, the mixture was stirred at room temperature for 2 hours. 1N Hydrochloric acid was added to the reaction solution, and the mixture was extracted with ethyl acetate.
- Step 2 (6S) -5- [4- (benzyloxy) -5-methoxy-2-nitrobenzoyl] -5-azaspiro [2.4] heptane-6-carbaldehyde (8-2)
- the compound (8-1) (4.50 g, 11.0 mmol) obtained in the above Step 1 was reacted in the same manner as in Step 8 of Example 10-1 to obtain the desired product (8-2) (1.94 g, 43%) was obtained.
- Step 3 (11a'S) -8'-hydroxy-7'-methoxy-1 ', 10', 11 ', 11a'-tetrahydro-5'H-spiro [cyclopropane-1,2'-pyrrolo [2 , 1-c] [1,4] Benzodiazepine] -5'-one (8-3)
- tetrahydrofuran 25 mL
- ethyl acetate 25 mL
- methanol 25 mL
- Step 4 Prop-2-en-1-yl (11a ′S) -8 ′-[(5-bromopentylo) oxy] -11 ′- ⁇ [tert-butyl (dimethyl) silyl] oxy ⁇ -7 ′ -Methoxy-5'-oxo-11 ', 11a'-dihydro-1'H-spiro [cyclopropane-1,2'-pyrrolo [2,1-c] [1,4] benzodiazepine] -10' (5 'H) -carboxylate (8-4)
- the compound (7-5) (0.300 g, 0.614 mmol) obtained in Step 5 of Example 10-7 was reacted in the same manner as in Step 2 of Example 10-3 to give the desired product (8-4) ( 0.388 g, 99%) was obtained.
- Step 5 Prop-2-en-1-yl (11a ′S) -11 ′- ⁇ [tert-butyl (dimethyl) silyl] oxy ⁇ -7′-methoxy-8 ′-[(5- ⁇ [(11a 'S) -7'-Methoxy-5'-oxo-5', 10 ', 11', 11a'-tetrahydro-1'H-spiro [cyclopropane-1,2'-pyrrolo [2,1-c] [1,4] Benzodiazepine] -8'-yl] oxy ⁇ pentyl) oxy] -5'-oxo-11 ', 11a'-dihydro-1'H-spiro [cyclopropane-1,2'-pyrrolo [2 , 1-c] [1,4] Benzodiazepine] -10 ′ (5′H) -carboxylate (8-5) The compound (8-4) (0.203 g 0.318 mmol) obtained in the above step 4 and the
- Step 6 Prop-2-en-1-yl (11a'S) -11'-hydroxy-7'-methoxy-8 '-[(5- ⁇ [(11a'S) -7'-methoxy-5' -Oxo-5 ', 10', 11 ', 11a'-tetrahydro-1'H-spiro [cyclopropane-1,2'-pyrrolo [2,1-c] [1,4] benzodiazepine] -8'- Ill] oxy ⁇ pentyl) oxy] -5′-oxo-11 ′, 11a′-dihydro-1′H-spiro [cyclopropane-1,2′-pyrrolo [2,1-c] [1,4] benzodiazepine ] -10 '(5'H) -carboxylate (8-6) The compound (8-5) (0.0880 g, 0.106 mmol) obtained in the above Step 5 was reacted in the same manner as in Step 11 of Example 10-3 to give the object product
- Step 7 (11a'S) -7'-methoxy-8 '-[(5- ⁇ [(11a'S) -7'-methoxy-5'-oxo-5', 11a'-dihydro-1'H -Spiro [cyclopropane-1,2'-pyrrolo [2,1-c] [1,4] benzodiazepine] -8'-yl] oxy ⁇ pentyl) oxy] -1 ', 10', 11 ', 11a'-Tetrahydro-5'H-spiro[cyclopropane-1,2'-pyrrolo [2,1-c] [1,4] benzodiazepine] -5'-one (8-7)
- the compound (8-6) (0.0500 g, 0.0698 mmol) obtained in the above Step 6 was reacted in the same manner as in Step 12 of Example 10-3 to obtain the desired product (8-7) (0.0330 g, 77).
- Step 1 Di-2-propen-1-yl ⁇ 1,5-pentanediylbis [oxy (6- ⁇ [(6S) -6- (hydroxymethyl) -5-azaspiro [2.4] hept-5- Yl] carbonyl ⁇ -4-methoxybenzene-3,1-diyl)] ⁇ biscarbamate (9-1)
- the bisallyloxycarbonyl compound (5-6b) (0.460 g, 0.508 mmol) obtained in Step 5 of Example 10-5 was reacted in the same manner as in Step 7 of Example 10-5 to give the desired product (9- 1) (0.421 g, quantitative) was obtained.
- Step 2 Diprop-2-en-1-yl (11a ′S, 11a ′′ ′′ S) -8 ′, 8 ′′-[pentane-1,5-diylbis (oxy)] bis (11′-hydroxy -7'-Methoxy-5'-oxo-11 ', 11a'-dihydro-1'H-spiro [cyclopropane-1,2'-pyrrolo [2,1-c] [1,4] benzodiazepine] -10 '(5'H) -carboxylate) (9-2)
- the compound (9-1) (0.421 g, 0.513 mmol) obtained in Step 1 above was reacted in the same manner as in Step 8 of Example 10-5 to give the desired product (9-2) (0.326 g, 78%).
- Step 3 (11a ′S, 11a ′′ ′′ S) -8 ′, 8 ′′-[1,5-pentanediylbis (oxy)] bis (7′-methoxy-1 ′, 11a′-dihydro- 5'H-spiro [cyclopropane-1,2'-pyrrolo [2,1-c] [1,4] benzodiazepine] -5'-one) (9-3)
- the compound (9-2) (0.326 g, 0.399 mmol) obtained in the above Step 2 was reacted in the same manner as in Step 12 of Example 10-3 to obtain the desired product (9-3) (0.208 g, 85%).
- Step 1 (2R, 11aS) -2,8-dihydroxy-7-methoxy-10- ⁇ [2- (trimethylsilyl) ethoxy] methyl ⁇ -2,3-dihydro-1H-pyrrolo [2,1-c] [ 1,4] Benzodiazepine-5,11 (10H, 11aH) -dione (10-1)
- the target compound (10-1) (3.95 g) was prepared by reacting the compound (3-2) (5.00 g, 9.66 mmol) obtained in Step 1 of Example 10-3 in the same manner as in Step 3 of Example 10-3. , 100%).
- Step 2 (2R, 11aS) -2-hydroxy-7-methoxy-10- ⁇ [2- (trimethylsilyl) ethoxy] methyl ⁇ -8- ⁇ [tri (propan-2-yl) silyl] oxy ⁇ -2, 3-Dihydro-1H-pyrrolo [2,1-c] [1,4] benzodiazepine-5,11 (10H, 11aH) -dione (10-2)
- a dichloromethane (97 mL) solution of the compound (10-1) (3.95 g, 9.67 mmol) obtained in the above step 1 imidazole (1.65 g, 24.2 mmol) and triisopropylsilyl chloride (2.46 mL, 11.6 mmol) and dimethylformamide (5 mL) were added, and the mixture was stirred at room temperature for 21 hours.
- Step 3 (11aS) -7-Methoxy-10- ⁇ [2- (trimethylsilyl) ethoxy] methyl ⁇ -8- ⁇ [tri (propan-2-yl) silyl] oxy ⁇ -1H-pyrrolo [2,1- c] [1,4] benzodiazepine-2,5,11 (3H, 10H, 11aH) -trione
- Compound (10-2) (4.78 g, 8.43 mmol) obtained in Step 2 above was used in the Example. Reaction was performed in the same manner as in Step 4 of 10-3 to obtain the target product (10-3) (2.36 g, 50%).
- Step 4 (11aS) -7-methoxy-5,11-dioxo-10- ⁇ [2- (trimethylsilyl) ethoxy] methyl ⁇ -8- ⁇ [tri (propan-2-yl) silyl] oxy ⁇ -5, 10,11,11a-Tetrahydro-1H-pyrrolo [2,1-c] [1,4] benzodiazepin-2-yl trifluoromethanesulfonate (10-4)
- the compound (10-3) (1.53 g, 2,72 mmol) obtained in Step 3 above was reacted in the same manner as in Step 5 of Example 10-3 to give the target compound (10-4) (1.27 g, 69). %) Was obtained.
- Step 5 (11aS) -7-Methoxy-2- (4-methoxyphenyl) -10- ⁇ [2- (trimethylsilyl) ethoxy] methyl ⁇ -8- ⁇ [tri (propan-2-yl) silyl] oxy ⁇ -1H-Pyrrolo [2,1-c] [1,4] benzodiazepine-5,11 (10H, 11aH) -dione (10-5)
- the compound (10-4) (0.519 g, 0.747 mmol) obtained in Step 4 above was reacted in the same manner as in Step 6 of Example 10-3 to give the target compound (10-5) (0.511 g, quantification).
- Target 0.511 g, quantification.
- Step 6 (11aS) -7-Methoxy-2- (4-methoxyphenyl) -8- ⁇ [tri (propan-2-yl) silyl] oxy ⁇ -1,11a-dihydro-5H-pyrrolo [2,1 -C] [1,4] benzodiazepin-5-one (10-6)
- the compound (10-5) (0.178 g, 0.272 mmol) obtained in Step 5 above was reacted in the same manner as in Step 7 of Example 10-3 to give the target compound (10-6) (0.094 g, 68). %) was obtained.
- Step 7 (11aS) -7-Methoxy-2- (4-methoxyphenyl) -8- ⁇ [tri (propan-2-yl) silyl] oxy ⁇ -1,10,11,11a-tetrahydro-5H-pyrrolo [2,1-c] [1,4] benzodiazepin-5-one (10-7)
- the compound (10-6) (0.063 g, 0.124 mmol) obtained in Step 6 above was reacted in the same manner as in Step 8 of Example 10-3 to give the target compound (10-7) (0.046 g , 72%).
- 1H-NMR (CDCl3) ⁇ : 7.53-7.48 (2H, m), 7.33-7.29 (2H, m), 6.90-6.86 (2H, m), 6.13.
- Step 8 Prop-2-en-1-yl (11aS) -7-methoxy-2- (4-methoxyphenyl) -5-oxo-8- ⁇ [tri (propan-2-yl) silyl] oxy ⁇ - 11,11a-Dihydro-1H-pyrrolo [2,1-c] [1,4] benzodiazepine-10 (5H) -carboxylate (10-8)
- the target compound (10-8) (0.03 g , 56%).
- 1H-NMR (CDCl3) ⁇ : 7.39-7.36 (1H, m), 7.31-7.28 (2H, m), 7.22 (1H, s), 6.90-6.86.
- Step 9 Prop-2-en-1-yl (11aS) -8-hydroxy-7-methoxy-2- (4-methoxyphenyl) -5-oxo-11,11a-dihydro-1H-pyrrolo [2,1 -C] [1,4] benzodiazepine-10 (5H) -carboxylate (10-9)
- the compound (10-8) (0.030 g, 0.050 mmol) obtained in Step 8 above was reacted in the same manner as in Step 10 of Example 10-1 to give the object compound (10-9) (0.015 g, 0). 0.034 mmol) was obtained.
- Step 10 Prop-2-en-1-yl (11a ′S) -8 ′-(3-bromopropoxy) -11 ′- ⁇ [tert-butyl (dimethyl) silyl] oxy ⁇ -7′-methoxy-5 '-Oxo-11', 11a'-dihydro-1'H-spiro [cyclopropane-1,2'-pyrrolo [2,1-c] [1,4] benzodiazepine] -10 '(5'H)- Carboxylate (10-10) The compound (7-5) (0.131 g, 0.268 mmol) obtained in Step 5 of Example 7 was reacted in the same manner as in Step 1 of Example 10-4 to give the desired product (10-10) (0.086 g, 52%).
- Step 11 Prop-2-en-1-yl (11a ′S) -11 ′- ⁇ [tert-butyl (dimethyl) silyl] oxy ⁇ -7′-methoxy-8 ′-[3-( ⁇ (11aS) -7-Methoxy-2- (4-methoxyphenyl) -5-oxo-10-[(prop-2-en-1-yloxy) carbonyl] -5,10,11,11a-tetrahydro-1H-pyrrolo [2 , 1-c] [1,4] benzodiazepin-8-yl ⁇ oxy) propoxy] -5′-oxo-11 ′, 11a′-dihydro-1′H-spiro [cyclopropane-1,2′-pyrrolo [ 2,1-c] [1,4] benzodiazepine] -10 '(5'H) -carboxylate (10-11)
- Step 12 Prop-2-en-1-yl (11a ′S) -11′-hydroxy-7′-methoxy-8 ′-[3-( ⁇ (11aS) -7-methoxy-2- (4-methoxy Phenyl) -5-oxo-10-[(prop-2-en-1-yloxy) carbonyl] -5,10,11,11a-tetrahydro-1H-pyrrolo [2,1-c] [1,4] benzodiazepines -8-yl ⁇ oxy) propoxy] -5'-oxo-11 ', 11a'-dihydro-1'H-spiro [cyclopropane-1,2'-pyrrolo [2,1-c] [1,4] Benzodiazepine] -10 '(5'H) -carboxylate (10-12) The compound (10-11) (0.031 g, 0.032 mmol) obtained in the above Step 11 was reacted in the same manner as in Step 11 of Example 10-3 to give the desired product (10
- Step 13 (11a'S) -7'-methoxy-8 '-(3- ⁇ [(11aS) -7-methoxy-2- (4-methoxyphenyl) -5-oxo-5,10,11,11a -Tetrahydro-1H-pyrrolo [2,1-c] [1,4] benzodiazepin-8-yl] oxy ⁇ propoxy) -1 ', 11a'-dihydro-5'H-spiro [cyclopropane-1,2' -Pyrrolo [2,1-c] [1,4] benzodiazepine] -5'-one (10-13)
- the compound (10-12) (0.026 g, 0.030 mmol) obtained in the above Step 12 was reacted in the same manner as in Step 12 of Example 10-3 to give the desired product (10-13) (0.018 g, 88%).
- Step 1 (MSG1-) Asn Commercially available monosialo-Asn free (1S2G / 1G2S-10NC-Asn, manufactured by Glycoengineering Research Institute, Ltd.) (referred to as “(MSG-) Asn”) (500 mg) was subjected to reverse phase HPLC separation under the following conditions.
- Step 2 MSG1
- the compound (229 mg) obtained in the above step 1 was dissolved in 200 mM phosphate buffer solution (pH 6.25) (1145 ⁇ L), and an EndoM (Tokyo Kasei Kogyo Co., Ltd., 1 U / mL) aqueous solution (100 ⁇ L) was added. Incubated at 35 ° C for 6 days. After completion of the reaction, the reaction solution was subjected to ultrafiltration using VIVASPIN 15R (Hydrosart membrane, 30K, 6,000xG), and the obtained passing solution was subjected to reverse phase HPLC separation and purification.
- a 0.1% trifluoroacetic acid aqueous solution was used as an eluent, an ELS-PDA trigger preparative system (manufactured by JASCO Corporation) was used for the apparatus, and Inertsil ODS-3 (manufactured by GL Science) was used for the column. Fractions containing the target substance subjected to UV detection (210 nm) during elution were combined and freeze-dried to obtain the target substance (117 mg).
- Step 3 [N 3 -PEG (3)]-MSG1 Into a 5 ml sampling tube (Ina Optica Co., Ltd.), 11-azido-3,6,9-trioxaundecan-1-amine (0.108 mL, 0.541 mmol) and MSG1 (117 mg) obtained in the above step 2 , 0.068 mmol) in water (1.2 mL) was added, and the mixture was stirred for 1 hr and lyophilized.
- Step 4 [N 3 -PEG (3)]-MSG1-Ox
- a 5 mL sampling tube manufactured by Ina Optica Co., Ltd.
- 2-chloro-1,3-dimethyl-1H-benzimidazol-3-ium-chloride manufactured by Fushimi Pharmaceutical Co., Ltd.
- 56 mg, 0.257 mmol in water (520 ⁇ l) was added.
- An aqueous solution (520 ⁇ l) of tripotassium phosphate (165 mg, 0.78 mmol) was added to the reaction solution after ice cooling, and the mixture was stirred under ice cooling for 3 hours.
- the obtained reaction liquid was subjected to ultrafiltration using Amicon Ultra (Ultracell 30K, manufactured by Merck Millipore) to remove solid matter.
- the passing liquid was purified by gel filtration chromatography.
- Purif-Rp2 manufactured by Shoko Scientific
- HiPrep 26/10 Desalting manufactured by GE Healthcare
- 0.03% -NH3 aqueous solution was used for the mobile phase
- the flow rate was used.
- Examples 12-16 describe the preparation of sugar chain remodeling antibodies.
- Step 1 Preparation of (Fuc ⁇ 1,6) GlcNAc-H01L02 antibody H01L02 antibody solution ca. 0.233 mL of 7.7 mg / mL wild-type EndoS solution (PBS) was added to 21.1 mg / mL (50 mM phosphate buffer (pH 6.0)) (4.07 mL), and incubated at 37 ° C. for 4 hours. The progress of the reaction was confirmed using an Experion electrophoresis station (manufactured by BIO-RAD). After completion of the reaction, purification by affinity chromatography and purification by a hydroxyapatite column were performed according to the following methods.
- a washing solution (20 mM phosphate buffer (pH 7.0), 0.5 M sodium chloride solution) was flowed at 15 CV.
- 6 CV of elution buffer (ImmunoPure IgG Edition buffer, manufactured by PIERCE) was flown.
- the eluate was immediately neutralized with 1M Tris buffer (pH 9.0).
- the fraction containing the target product was exchanged with a 5 mM phosphate buffer 50 mM 2-morpholinoethanesulfonic acid (MES) solution (pH 6.8) for buffer exchange.
- MES 2-morpholinoethanesulfonic acid
- the solution A and the solution B (5 mM phosphate buffer solution 50 mM 2-morpholinoethanesulfonic acid (MES) solution (pH 6.8), 2M sodium chloride solution) were used for elution.
- the fraction containing the target substance was subjected to buffer exchange using the common procedure C, and 11.4 mg / mL (Fuc ⁇ 1,6) GlcNAc-H01L02 antibody solution (50 mM phosphate buffer (pH 6.0)) (5.00 mL) ) Got.
- Step 2 Preparation of H01L02 antibody- [MSG1-N 3 ] 2 11.4 mg / mL (Fuc ⁇ 1,6) GlcNAc-H01L02 antibody solution (50 mM phosphate buffer solution (pH 6.0)) obtained in the above step 1 (5.00 mL), a 50 mM phosphate buffer (pH 6.0) solution (0.180 mL) of the sugar chain (9.00 mg) synthesized in Example 11, step 4, 5.10 mg / mL EndoS D233Q / Q303L. Solution (PBS) (0.230 mL) was added and incubated at 30 ° C. for 3 hours.
- PBS 50 mM phosphate buffer solution
- Step 1 Preparation of (Fuc ⁇ 1,6) GlcNAc-H01L02A antibody H01L02A antibody solution ca. Using 21.6 mg / mL (50 m phosphate buffer solution (pH 6.0)) (1.85 mL), the same operation as in the above-mentioned Example 12, step 1 was carried out to obtain 14.6 mg / mL (Fuc ⁇ 1,6). A GlcNAc-H01L02A antibody solution (50 mM phosphate buffer (pH 6.0)) (2.0 mL) was obtained.
- Step 2 Preparation of H01L02A antibody- [MSG1-N 3 ] 2 14.6 mg / mL (Fuc ⁇ 1,6) GlcNAc-H01L02A antibody solution (50 mM phosphate buffer solution (pH 6.0)) obtained in the above step 1 ( 2.0 mL), the same operation as in Step 2 of Example 12 was performed to obtain 10.0 mg / mL of H01L02A antibody- [MSG1-N 3 ] 2 solution (acetate buffer (pH 5.5, sorbitol-containing solution)). )) (2.5 mL) was obtained.
- Step 1 Preparation of (Fuc ⁇ 1,6) GlcNAcH31L02A antibody H31L02A antibody solution ca. Using 23.2 mg / mL (50 m phosphate buffer solution (pH 6.0)) (3.45 mL), the same operation as in Example 12, Step 1 was performed to obtain 8.43 mg / mL (Fuc ⁇ 1,6). A GlcNAc-H31L02A antibody solution (50 mM phosphate buffer (pH 6.0)) (6.1 mL) was obtained.
- Step 2 Preparation of H31L02A antibody- [MSG1-N 3 ] 2 8.43 mg / mL (Fuc ⁇ 1,6) GlcNAc-H31L02A antibody solution (50 mM phosphate buffer solution (pH 6.0)) obtained in the above step 1 ( The same procedure as in step 2 of Example 12 was performed using 5.00 mL) to prepare a 6.52 mg / mL H31L02A antibody- [MSG1-N 3 ] 2 solution (phosphate buffered saline (pH 6.0)). )) (4.00 mL) was obtained.
- Step 1 Preparation of (Fuc ⁇ 1,6) GlcNAc-H11L02A antibody H11L02A antibody solution ca. Using 24.2 mg / mL (50 m phosphate buffer solution (pH 6.0)) (3.0 mL), the same operation as in Example 12, Step 1 above was carried out to obtain 20.42 mg / mL (Fuc ⁇ 1,6). A GlcNAc-H11L02A antibody solution (50 mM phosphate buffer (pH 6.0)) (2.7 mL) was obtained.
- Step 2 Preparation of H11L02A antibody- [MSG1-N 3 ] 2 20.39 mg / mL (Fuc ⁇ 1,6) GlcNAc-H11L02A antibody solution (50 mM phosphate buffer solution (pH 6.0)) obtained in the above step 1 ( The same procedure as in Step 2 of Example 12 above was carried out using 1.55 mL) to obtain 10.26 mg / mL H11L02A antibody- [MSG1-N 3 ] 2 solution (acetate buffer solution (pH 5.5, containing Sorbitol)) (2.6 mL) was obtained.
- Step 1 Preparation of (Fuc ⁇ 1,6) GlcNAc-anti-LPS antibody Anti-LPS antibody solution ca. Using 17 mg / mL (25 mM histidine solution (pH 6.0), 5% sorbitol solution) (6.6 mL), the same operation as in Example 12, step 1 was carried out to obtain 21.03 mg / mL (Fuc ⁇ 1,6). A GlcNAc-anti-LPS antibody solution (50 mM phosphate buffer (pH 6.0)) (5.4 mL) was obtained.
- Step 2 Preparation of anti-LPS antibody- [MSG1-N 3 ] 2 21.03 mg / mL (Fuc ⁇ 1,6) GlcNAc-anti-LPS antibody solution (50 mM phosphate buffer (pH 6.0)) obtained in the above step 1 ) (5.4 mL) in the same manner as in Example 12, step 2, to obtain 9.89 mg / mL anti-LPS antibody- [MSG1-N 3 ] 2 solution (phosphate buffered saline ( pH 6.0)) (7.9 mL) was obtained.
- Examples 17-27 describe the synthesis of ADCs.
- Example 17 ADC1
- the ADC described in Example 17 was prepared by conjugating the antibody obtained in Step 2 of Example 12 and the drug linker (3-14) obtained in Step 13 of Example 10-3 as shown in the following reaction formula.
- R represents the drug linker used in the examples.
- Step 1 Conjugation of antibody and drug linker To the phosphate buffered saline (pH 6.0) solution (6.76 mg / mL, 1.50 mL) of the antibody obtained in Example 12, Step 2, at room temperature. 1,2-Propanediol (1.42 mL) and a 10 mM solution of the compound (3-14) obtained in Step 13 of Example 10-3 in 10 mM dimethyl sulfoxide (0.0836 mL; 12 equivalents per molecule of antibody) were added.
- phosphate buffered saline (pH 6.0) solution (6.76 mg / mL, 1.50 mL) of the antibody obtained in Example 12, Step 2, at room temperature.
- 1,2-Propanediol (1.42 mL)
- a tube rotator (MTR-103, As One Co., Ltd.) was used to react at room temperature for 48 hours. Purification procedure: The above solution was purified using the common procedure D to obtain 6.00 mL of a solution containing the target compound.
- Example 18 ADC2 The ADC described in Example 18 conjugates the antibody obtained in Step 2 of Example 13 and the drug linker (4-12) obtained in Step 12 of Example 10-4 as shown in the following reaction scheme. Synthesized by In the formula, R represents the drug linker used in the examples.
- Step 1 Conjugation of antibody and drug linker To a 10 mM acetate buffer solution of the antibody obtained in Example 13, Step 2 in 5% sorbitol (pH 5.5) (10.0 mg / mL, 100 ⁇ L) at room temperature.
- Example 19 ADC3
- the ADC described in Example 19 was synthesized by conjugating the antibody obtained in Step 2 of Example 13 with the drug linker (5-11) obtained in Step 10 of Example 10-5.
- Step 1 Conjugation of antibody and drug linker To the antibody obtained in Example 13, Step 2, was added 10 mM acetate buffer, 5% sorbitol (pH 5.5) solution (10.0 mg / mL, 100 ⁇ L) at room temperature.
- Example 20 ADC4
- the ADC described in Example 20 was synthesized by conjugating the antibody obtained in Step 2 of Example 13 with the drug linker (6-13) obtained in Step 12 of Example 10-6.
- Step 1 Conjugation of antibody and drug linker To the antibody obtained in Example 13, Step 2, was added 10 mM acetate buffer, 5% sorbitol (pH 5.5) solution (10.0 mg / mL, 100 ⁇ L) at room temperature.
- Example 21 ADC5
- the ADC described in Example 21 was synthesized by conjugating the antibody obtained in Step 2 of Example 13 with the drug linker (3-14) obtained in Step 13 of Example 10-3.
- Step 1 Conjugation of antibody and drug linker To a 10 mM acetate buffer, 5% sorbitol (pH 5.5) solution (10.0 mg / mL, 1.70 mL) of the antibody obtained in Example 13, Step 2, at room temperature. 1,2-propanediol (0.850 mL), a 10 mM dimethyl sulfoxide solution of the compound (3-14) obtained in Step 13 of Example 10-3 (0.141 mL; 12 equivalents per molecule of antibody).
- Example 22 ADC6
- the ADC described in Example 22 is a conjugation of the antibody obtained in Step 2 of Example 14 and the drug linker (3-14) obtained in Step 13 of Example 10-3 as shown in the following reaction formula.
- R represents the drug linker used in the examples.
- Step 1 Conjugation of antibody and drug linker To the phosphate buffered saline (pH 6.0) solution (10.1 mg / mL, 0.400 mL) of the antibody obtained in Example 14, Step 2, at room temperature. 1,2-propanediol (0.367 mL) and a 10 mM dimethyl sulfoxide solution of the compound (3-14) obtained in Step 13 of Example 10-3 (0.0333 mL; 12 equivalents per antibody molecule) were added.
- phosphate buffered saline (pH 6.0) solution 10.1 mg / mL, 0.400 mL
- 1,2-propanediol 0.367 mL
- a 10 mM dimethyl sulfoxide solution of the compound (3-14) obtained in Step 13 of Example 10-3 0.0333 mL; 12 equivalents per antibody molecule
- a tube rotator (MTR-103, As One Co., Ltd.) was used to react at room temperature for 48 hours. Purification procedure: The above solution was purified using the common procedure D to obtain 3.50 mL of a solution containing the target compound.
- Antibody concentration 0.820 mg / mL, antibody yield: 2.88 mg (81%), average drug binding number per antibody molecule (n): 1.9
- the ADCs described in Examples 23 to 26 conjugate the antibody obtained in Step 2 of Example 15 with the drug linker obtained in Examples 10-3 to 10-6 as shown in the following reaction scheme. Synthesized by In the formula, R varies depending on the drug linker used in each example.
- Step 1 Conjugation of antibody and drug linker Into a 10 mM acetate buffer, 5% sorbitol (pH 5.5) solution (10.54 mg / mL, 0.4 mL) of the antibody obtained in Example 15, Step 2, at room temperature. 1,2-propanediol (0.100 mL), a 10 mM dimethyl sulfoxide solution of the compound (3-14) obtained in Step 13 of Example 10-3 (0.035 mL; 12 equivalents per antibody molecule).
- Step 1 Conjugation of antibody and drug linker Into a 10 mM acetate buffer, 5% sorbitol (pH 5.5) solution (2.8 mg / mL, 0.3 mL) of the antibody obtained in Example 15 Step 2, room temperature was added.
- 1,2-propanediol (75 ⁇ L), a 10 mM dimethyl sulfoxide solution of the compound (4-12) obtained in Step 12 of Example 10-4 (7 ⁇ L; 12 equivalents per molecule of antibody), and 1, A mixed solution of 2-propanediol (218 ⁇ L) was added, and the mixture was allowed to react at room temperature for 48 hours using a tube rotator (MTR-103, As One Co., Ltd.). Purification procedure: The above solution was purified using the common procedure D to obtain 2.5 mL of a solution containing the target compound.
- Step 1 Conjugation of antibody and drug linker To a 10 mM acetate buffer solution of the antibody obtained in Example 2, Step 2 in 5% sorbitol (pH 5.5) (2.8 mg / mL, 300 ⁇ L) at room temperature.
- Step 1 Conjugation of antibody and drug linker To a 10 mM acetate buffer solution of the antibody obtained in Example 15, Step 2 in 5% sorbitol (pH 5.5) (2.8 mg / mL, 300 ⁇ L) at room temperature.
- 1,2-Propanediol 75 ⁇ L and a solution of the compound (6-13) obtained in Step 12 of Example 10-6 in 10 mM dimethyl sulfoxide solution (7 ⁇ L; 12 equivalents per antibody molecule), 1,2 A mixed solution of propanediol (218 ⁇ L) was added, and the mixture was reacted for 48 hours at room temperature using a tube rotator (MTR-103, As One Co., Ltd.). Purification procedure: The above solution was purified using the common procedure D to obtain 2.5 mL of a solution containing the target compound.
- Antibody concentration 0.25 mg / mL, antibody yield: 0.62 mg (74%), average drug binding number (n) per antibody molecule: 1.8
- the ADC described in Example 27 is a conjugation of the antibody obtained in Step 2 of Example 16 and the drug linker (3-14) obtained in Step 13 of Example 10-3 as shown in the following reaction formula.
- R represents the drug linker used in the examples.
- Step 1 Conjugation of antibody and drug linker To the phosphate buffered saline (pH 6.0) solution (9.89 mg / mL, 0.40 mL) of the antibody obtained in Step 2 of Example 16 at room temperature. A solution of 1,2-propanediol (0.367 mL) and the compound (3-14) obtained in Step 13 of Example 10-3 at 10 mM in dimethyl sulfoxide (0.0328 mL; 12 equivalents per molecule of antibody).
- Example 28 Configurational analysis of the compound (1-11) shown in Example 10-1
- the compound (1-11) described in [Example 10-1: Intermediate 1] was obtained by selective 1D ROESY spectrum. Based on the obtained correlation (lower figure), the absolute configuration of the 11'-position was analyzed. Correlation is observed between 1' ⁇ -H and 11'-H, between 3' ⁇ -H and 11'-H, and between 1' ⁇ -H and 3' ⁇ -H. The absolute configuration at the 11'-position was found to be the S configuration.
- steps 1 to 10 shown in [Example 10-1: Intermediate 1] are represented as follows.
- DMA of 10 mM 1- (2,5-dioxopyrrolidin-1-yloxy) -1-oxo-4- (pyridin-2-yldisulfanyl) butane-2-sulfonic acid described in WO2016 / 024195 published patent publication DMA of solution (0.366 mL; 5.2 equivalents per molecule of antibody), 10 mM N2'-deacetyl-deacetyl-N2 '-(4-methyl-4-mercapto-1-oxopentyl) -maytansine (DM4)
- a solution (0.366 mL; 6.8 equivalents per antibody molecule) and 0.243 mL of DMA were added and incubated at 20 ° C. for 16 hours to attach the drug linker to the antibody.
- 1M acetic acid aqueous solution was added to adjust the pH to 5.0, and the mixture was further stirred at room temperature for 20 minutes to stop the reaction of the drug linker.
- Example 29 Evaluation of in vitro activity of antibody-drug conjugate Evaluation of In Vitro Cell Proliferation Inhibitory Activity of Antibody-Drug Conjugate Against CDH6-Positive Human Tumor Cell Lines
- PA-1 and human renal cell tumor cell line 786-O all obtained from ATCC
- a 96-well plate was inoculated so that the cells were grown, and the cells were cultured overnight under the conditions of 37 ° C. and 5% CO 2 .
- the ADC11 produced in Example 27, the ADC1 produced in Example 17, the ADC5 produced in Example 21, the ADC7 produced in Example 23, or the ADC6 produced in Example 22 was used at a final concentration of 100 (nM).
- To 0.000256 (nM) antibody-drug conjugate diluted at a 5-fold common ratio was added. After culturing for 6 days, the number of viable cells was measured by quantifying ATP by CellTiter-Glo TM Luminescent Cell Viability Assay (Promega). The IC50 value as the cell growth inhibitory activity was calculated by the following formula, and the decimal point was rounded off to the second decimal place.
- IC50 (nM) antilog ((50 ⁇ d) ⁇ (LOG10 (b) ⁇ LOG10 (a)) ⁇ (dc) + LOG10 (b)) a: sample concentration a b: sample concentration b c: viable cell rate at sample concentration a d: viable cell rate at sample concentration b a and b are a> b at two points sandwiching a viable cell rate of 50%.
- FIG. 9 shows the IC50 (nM) when each antibody-drug conjugate was added.
- the IC50 values of the drug conjugates of the three anti-CDH6 antibodies were higher than those of ADC11, which is an antibody-drug conjugate that does not bind to CDH6. Since it was extremely low, it was shown to have a very strong cytostatic activity specific to the expression of CDH6. Further, a correlation was observed between the binding activity of the antibody to CDH6 (Table 3) and the cell growth inhibitory activity of the antibody-drug conjugate. A similar tendency was observed in renal cell tumor cell lines with low CDH6 expression level in vitro (Fig. 9).
- Example 30 In vivo antitumor effect 1 of antibody-drug conjugate
- the antitumor effect of the antibody-drug conjugate was evaluated using an animal model in which cells of a CDH6-positive human tumor cell line were transplanted into immunodeficient mice. 4-5 week old BALB / c nude mice (CAnN.Cg-Foxnl [nu] / CrlCrlj [Foxnlnu / Foxnlnu], Charles River Japan) and SCID mice (CB17 / Icr-Prkdc [scid] / CrlCrlj, Japan. (Charles River) was acclimated for 3 days or more under SPF conditions before use in the experiment.
- mice were fed sterilized chow (FR-2, Funabashi Farms Co., Ltd) and sterilized tap water (prepared by adding 5-15 ppm sodium hypochlorite solution).
- the major axis and minor axis of the transplanted tumor were measured twice a week with an electronic digital caliper (CD-15CX, Mitutoyo Corp.), and the tumor volume was calculated by the following formula.
- Tumor volume (mm 3 ) 1/2 ⁇ major axis (mm) ⁇ [minor axis (mm)] 2
- All the antibody-drug conjugates were diluted with ABS buffer (10 mM-Acetate Buffer, 5% Sorbitol, pH 5.5) (NACALAI), and administered via the tail vein at the doses shown in each Example.
- An ABS buffer solution was similarly administered as a control group (vehicle group). Six mice per group were used in the experiment.
- NOV0712-DM4 showed tumor regrowth 30 days after administration, whereas ADC1 showed a strong tumor regression effect at a very low dose of 0.4 mg / kg, and it was observed for 42 days after administration. The strong antitumor effect lasted for a long time.
- ADC11 as a control which showed no binding to either mouse or transplanted human tumor cells used in the antitumor test, showed no antitumor effect. In all drug-administered groups, no decrease in body weight of mice was observed as compared to the control group ABS buffer-administered group.
- NOV0712-DM4 showed no antitumor effect at the dose of 10 mg / kg in this tumor model.
- ADC1 exerted an antitumor effect at a very low dose of 0.4 mg / kg.
- ADC11 as a control which showed no binding to either mouse or transplanted human tumor cells used in the antitumor test, showed no antitumor effect at 0.4 mg / kg (FIG. 11). That is, it was shown that the antitumor effect exhibited by ADC1 is a specific action depending on CDH6 expression in tumor cells. It was shown that the ADC1 of the present invention is an antibody-drug conjugate having an extremely excellent antitumor effect as compared with the prior art NOV0712-DM4. In all drug-administered groups, no decrease in body weight of mice was observed as compared to the control group ABS buffer-administered group.
- Example 2 Antitumor effect (3) CDH6 expression was confirmed in Example 2) -3, and the CDH6-positive human ovarian tumor cell line NIH: OVCAR-3 (ATCC) was suspended in Matrigel (Corning), and 1 ⁇ 10 7 cells of a female nude mouse were suspended. Subcutaneous transplantation was performed on the right flank (Day 0), and random grouping was performed on Day 28. On the day of grouping, ADC1 produced in Example 17, ADC5 produced in Example 21, ADC6 produced in Example 22, or ADC11 produced in Example 27 was added to the tail vein at a dose of 0.4 mg / kg. It was administered internally. Results are shown in FIG. The horizontal axis represents the number of days after administration, the vertical axis represents the tumor volume, and the error range represents the SE value.
- ADC6 showed the strongest antitumor effect, and then ADC1 and ADC5 showed almost the same antitumor effect. That is, it was shown that the antitumor effect as an antibody-drug conjugate was not substantially affected by the substitution of alanine for leucine at positions 234 and 235 specified by EU index of human antibody heavy chain.
- ADC11 as a control showed no antitumor effect at 0.4 mg / kg (Fig. 12). That is, it was shown that the antitumor effect of ADC1, ADC5, and ADC5 is a specific action depending on CDH6 expression in tumor cells. In all drug-administered groups, no decrease in body weight of mice was observed as compared to the control group ABS buffer-administered group.
- the CDH6 positive human ovarian tumor cell line OV-90 (ATCC) whose expression was confirmed in Example 2) -3 was suspended in Matrigel (Corning), and 2.5 ⁇ 10 6 cells of a female nude mouse were suspended. Subcutaneous transplantation was performed on the right flank (Day 0), and random grouping was performed on Day 17. On the day of grouping, 0.2 mg / kg or 0.4 mg / kg of ADC1 produced in Example 17, ADC5 produced in Example 21, ADC7 produced in Example 23, or ADC6 produced in Example 22 was used. It was administered via the tail vein at a dose of kg. The results are shown in Fig. 13. The horizontal axis represents the number of days after administration, the vertical axis represents the tumor volume, and the error range represents the SE value.
- CDH6 positive human ovarian tumor cell line PA-1 (ATCC), whose expression was confirmed in Example 2) -3, was suspended in Matrigel (Corning), and 7.5 ⁇ 10 6 cells of a female nude mouse were suspended. Subcutaneous transplantation was performed on the right flank (Day 0), and random grouping was performed on Day 17. On the day of grouping, ADC5 produced in Example 21, ADC6 produced in Example 22 or ADC11 produced in Example 27 was administered to the tail vein at a dose of 0.4 mg / kg. The results are shown in Fig. 14. The horizontal axis represents the number of days after administration, the vertical axis represents the tumor volume, and the error range represents the SE value.
- ADC5 showed the strongest antitumor effect, and the disappearance of the tumor was confirmed over a long period of 35 days.
- ADC6 then showed a strong antitumor effect (Fig. 14).
- no decrease in body weight of mice was observed as compared to the control group ABS buffer-administered group.
- the CDH6 positive human renal cell tumor cell line 786-O (ATCC) whose expression was confirmed in Example 2) -3 was suspended in Matrigel (Corning) and 5 ⁇ 10 6 cells were placed on the right side of the male SCID mouse. Subcutaneous transplantation into the abdomen (Day 0) and random grouping on Day 38 were performed. On the day of grouping, the ADC5 prepared in Example 21 and the ADC6 prepared in Example 22 were intravenously administered at a dose of 0.4 mg / kg. In addition, ADC11 prepared in Example 27 was administered into the tail vein at a dose of 0.4 mg / kg. The results are shown in Fig. 15. The horizontal axis represents the number of days after administration, the vertical axis represents the tumor volume, and the error range represents the SE value.
- ADC5 and ADC6 showed a strong antitumor effect (Fig. 15).
- ADC11 as a control showed no antitumor effect (Fig. 15). That is, it was shown that the antitumor effect of ADC5 and ADC6 is a specific action depending on CDH6 expression in tumor cells.
- no decrease in body weight of mice was observed as compared with the ABS buffer-administered group as a control group.
- the present invention provides an anti-CDH6 antibody having internalization activity and an antibody-drug conjugate containing the antibody.
- the antibody-drug conjugate can be used as a therapeutic agent for cancer and the like.
- SEQ ID NO: 1 human CDH6 ORF SEQ ID NO: EC1 Sequence number 3: EC2 Sequence number 4: EC3 SEQ ID NO: 5: EC4 Sequence number 6: EC5 SEQ ID NO: 7: Cynomolgus CDH6 ORF SEQ ID NO: 8: Cynomolgus CDH6 primer 1 SEQ ID NO: 9: Cynomolgus CDH6 primer 2 SEQ ID NO: 10: rG019 light chain variable region amino acid sequence SEQ ID NO: 11: rG019 light chain variable region nucleotide sequence SEQ ID NO: 12: rG019 CDRL1 SEQ ID NO: 13: rG019 CDRL2 SEQ ID NO: 14: rG019 CDRL3 SEQ ID NO: 15: heavy chain variable region amino acid sequence of rG019 SEQ ID NO: 16: heavy chain variable region nucleotide sequence of rG019 SEQ ID NO: 17: rG019 CDRH1 S
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Abstract
Description
[1]次式(X):
Abは、配列番号4に記載のアミノ酸配列を含むアミノ酸配列に特異的に結合し、細胞内に取り込まれる内在化能を有する、IgG抗体又は当該抗体の機能性断片を示し、
Lは、AbのN297に結合する糖鎖(N297糖鎖)とDを連結するリンカーであり、
N297糖鎖は、リモデリングされていてもよい糖鎖を示し、
Dは、以下:
で示される抗体-薬物コンジュゲート。
[2]前記抗体又は当該抗体の機能性断片が、配列番号4に記載のアミノ酸配列を含むアミノ酸配列への結合に対して、以下の(1)~(8):
(1)配列番号23の21~233番目のアミノ酸配列からなる軽鎖及び配列番号26の20~471番目のアミノ酸配列からなる重鎖を有する抗体、
(2)配列番号31の21~233番目のアミノ酸配列からなる軽鎖及び配列番号39の20~471番目のアミノ酸配列からなる重鎖を有する抗体、
(3)配列番号31の21~233番目のアミノ酸配列からなる軽鎖及び配列番号43の20~471番目のアミノ酸配列からなる重鎖を有する抗体、
(4)配列番号35の21~233番目のアミノ酸配列からなる軽鎖及び配列番号43の20~471番目のアミノ酸配列からなる重鎖を有する抗体、
(5)配列番号31の21~233番目のアミノ酸配列からなる軽鎖及び配列番号47の20~471番目のアミノ酸配列からなる重鎖を有する抗体、
(6)配列番号31の21~233番目のアミノ酸配列からなる軽鎖及び配列番号65の20~471番目のアミノ酸配列からなる重鎖を有する抗体、
(7)配列番号31の21~233番目のアミノ酸配列からなる軽鎖及び配列番号67の20~471番目のアミノ酸配列からなる重鎖を有する抗体、及び
(8)配列番号31の21~233番目のアミノ酸配列からなる軽鎖及び配列番号69の20~471番目のアミノ酸配列からなる重鎖を有する抗体、
からなる群から選択される抗体のうち少なくともいずれか1つと競合阻害活性を示す、
[1]に記載の抗体-薬物コンジュゲート。
[3]前記抗体又は当該抗体の機能性断片が、以下の(1)~(4):
(1)配列番号12に記載のアミノ酸配列からなるCDRL1、配列番号13に記載のアミノ酸配列からなるCDRL2及び配列番号14に記載のアミノ酸配列からなるCDRL3、及び、配列番号17に記載のアミノ酸配列からなるCDRH1、配列番号18に記載のアミノ酸配列からなるCDRH2及び配列番号19に記載のアミノ酸配列からなるCDRH3、
(2)配列番号12に記載のアミノ酸配列からなるCDRL1、配列番号13に記載のアミノ酸配列からなるCDRL2及び配列番号14に記載のアミノ酸配列からなるCDRL3、及び、配列番号17に記載のアミノ酸配列からなるCDRH1、配列番号30に記載のアミノ酸配列からなるCDRH2及び配列番号19に記載のアミノ酸配列からなるCDRH3、
(3)配列番号12に記載のアミノ酸配列からなるCDRL1、配列番号13に記載のアミノ酸配列からなるCDRL2及び配列番号14に記載のアミノ酸配列からなるCDRL3、及び、配列番号57に記載のアミノ酸配列からなるCDRH1、配列番号58に記載のアミノ酸配列からなるCDRH2及び配列番号59に記載のアミノ酸配列からなるCDRH3、及び
(4)配列番号12に記載のアミノ酸配列からなるCDRL1、配列番号13に記載のアミノ酸配列からなるCDRL2及び配列番号14に記載のアミノ酸配列からなるCDRL3、及び、配列番号62に記載のアミノ酸配列からなるCDRH1、配列番号63に記載のアミノ酸配列からなるCDRH2及び配列番号64に記載のアミノ酸配列からなるCDRH3、
からなる群から選択されるCDRL1、CDRL2及びCDRL3、及び、CDRH1、CDRH2及びCDRH3を含む、
[1]又は[2]のいずれか1項に記載の抗体-薬物コンジュゲート。
[4]前記抗体又は当該抗体の機能性断片が、以下の(1)~(4):
(1)配列番号33に記載のアミノ酸配列からなる軽鎖可変領域、
(2)配列番号37に記載のアミノ酸配列からなる軽鎖可変領域、
(3)(1)又は(2)のアミノ酸配列において各CDR配列以外のフレームワーク領域の配列に対して少なくとも95%以上の配列同一性を有するアミノ酸配列、及び
(4)(1)~(3)のアミノ酸配列において各CDR配列以外のフレームワーク領域の配列において1又は数個のアミノ酸が欠失、置換又は付加されたアミノ酸配列
からなる群から選択されるいずれか1つに記載の軽鎖可変領域、並びに、
以下の(5)~(11):
(5)配列番号41に記載のアミノ酸配列からなる重鎖可変領域、
(6)配列番号45に記載のアミノ酸配列からなる重鎖可変領域、
(7)配列番号49に記載のアミノ酸配列からなる重鎖可変領域、
(8)配列番号55に記載のアミノ酸配列からなる重鎖可変領域、
(9)配列番号60に記載のアミノ酸配列からなる重鎖可変領域、
(10)(5)~(9)のアミノ酸配列において各CDR配列以外のフレームワーク領域の配列に対して少なくとも95%以上の配列同一性を有するアミノ酸配列、及び
(11)(5)~(10)のアミノ酸配列において各CDR配列以外のフレームワーク領域の配列において1又は数個のアミノ酸が欠失、置換又は付加されたアミノ酸配列
からなる群から選択されるいずれか1つに記載の重鎖可変領域、
を含む、[1]~[3]のいずれか1項に記載の抗体-薬物コンジュゲート。
[5]前記抗体又は当該抗体の機能性断片が、以下の(1)~(6):
(1)配列番号33に記載のアミノ酸配列からなる軽鎖可変領域及び配列番号41に記載のアミノ酸配列からなる重鎖可変領域、
(2)配列番号33に記載のアミノ酸配列からなる軽鎖可変領域及び配列番号45に記載のアミノ酸配列からなる重鎖可変領域、
(3)配列番号37に記載のアミノ酸配列からなる軽鎖可変領域及び配列番号45に記載のアミノ酸配列からなる重鎖可変領域、
(4)配列番号33に記載のアミノ酸配列からなる軽鎖可変領域及び配列番号49に記載のアミノ酸配列からなる重鎖可変領域、
(5)配列番号33に記載のアミノ酸配列からなる軽鎖可変領域及び配列番号55に記載のアミノ酸配列からなる重鎖可変領域、又は
(6)配列番号33に記載のアミノ酸配列からなる軽鎖可変領域及び配列番号60に記載のアミノ酸配列からなる重鎖可変領域、
のいずれかの軽鎖可変領域及び重鎖可変領域、
を含む、[1]~[4]のいずれか1項に記載の抗体-薬物コンジュゲート。
[6]前記抗体又は当該抗体の機能性断片が、以下の(1)~(7):
(1)配列番号31の21~233番目のアミノ酸配列からなる軽鎖及び配列番号39の20~471番目のアミノ酸配列からなる重鎖、
(2)配列番号31の21~233番目のアミノ酸配列からなる軽鎖及び配列番号43の20~471番目のアミノ酸配列からなる重鎖、
(3)配列番号35の21~233番目のアミノ酸配列からなる軽鎖及び配列番号43の20~471番目のアミノ酸配列からなる重鎖、
(4)配列番号31の21~233番目のアミノ酸配列からなる軽鎖及び配列番号47の20~471番目のアミノ酸配列からなる重鎖、
(5)配列番号31の21~233番目のアミノ酸配列からなる軽鎖及び配列番号65の20~471番目のアミノ酸配列からなる重鎖、
(6)配列番号31の21~233番目のアミノ酸配列からなる軽鎖及び配列番号67の20~471番目のアミノ酸配列からなる重鎖、又は
(7)配列番号31の21~233番目のアミノ酸配列からなる軽鎖及び配列番号69の20~471番目のアミノ酸配列からなる重鎖、
のいずれかを有する、[1]~[5]のいずれか1項に記載の抗体-薬物コンジュゲート。
[7]前記抗体又は当該抗体の機能性断片が、配列番号31の21~233番目のアミノ酸配列からなる軽鎖及び配列番号39の20~471番目のアミノ酸配列からなる重鎖を有する、[6]に記載の抗体-薬物コンジュゲート。
[8]前記抗体又は当該抗体の機能性断片が、配列番号31の21~233番目のアミノ酸配列からなる軽鎖及び配列番号43の20~471番目のアミノ酸配列からなる重鎖を有する、[6]に記載の抗体-薬物コンジュゲート。
[9]前記抗体又は当該抗体の機能性断片が、配列番号35の21~233番目のアミノ酸配列からなる軽鎖及び配列番号43の20~471番目のアミノ酸配列からなる重鎖を有する、[6]に記載の抗体-薬物コンジュゲート。
[10]前記抗体又は当該抗体の機能性断片が、配列番号31の21~233番目のアミノ酸配列からなる軽鎖及び配列番号47の20~471番目のアミノ酸配列からなる重鎖を有する、[6]に記載の抗体-薬物コンジュゲート。
[11]前記抗体又は当該抗体の機能性断片が、配列番号31の21~233番目のアミノ酸配列からなる軽鎖及び配列番号65の20~471番目のアミノ酸配列からなる重鎖を有する[6]に記載の抗体-薬物コンジュゲート。
[12]前記抗体又は当該抗体の機能性断片が、配列番号31の21~233番目のアミノ酸配列からなる軽鎖及び配列番号67の20~471番目のアミノ酸配列からなる重鎖を有する[6]に記載の抗体-薬物コンジュゲート。
[13]前記抗体又は当該抗体の機能性断片が、配列番号31の21~233番目のアミノ酸配列からなる軽鎖及び配列番号69の20~471番目のアミノ酸配列からなる重鎖を有する[6]に記載の抗体-薬物コンジュゲート。
[14]Lが、-Lb-La-Lp-NH-B-CH2-O(C=O)-*で示され、
式中、*は前記DのN10’位の窒素原子と結合していることを示し、
Bは、1,4-フェニル基、2,5-ピリジル基、3,6-ピリジル基、2,5-ピリミジル基又は2,5-チエニル基であり、
Lpは、以下:
-GGVA-、-GG-(D-)VA-、-VA-、-GGFG-、-GGPI-、-GGVCit-、-GGVK-、及び、-GGPL-、
からなる群から選択されるいずれか1つを示し、
Laは、以下:
-C(=O)-CH2CH2-C(=O)-、
-C(=O)-(CH2CH2)2-C(=O)-、
-C(=O)-CH2CH2-C(=O)-NH-(CH2CH2)2-C(=O)-、
-C(=O)-CH2CH2-C(=O)-NH-(CH2CH2O)2-CH2-C(=O)-、
-C(=O)-CH2CH2-NH-C(=O)-(CH2CH2O)4-CH2CH2-C(=O)-、
-CH2-OC(=O)-、及び、
-OC(=O)-、
からなる群から選択されるいずれか1つを示し、並びに、
Lbは、次式:
[1]~[13]のいずれか1項に記載の抗体-薬物コンジュゲート。
[15]Lが、以下:
-Z1-C(=O)-CH2CH2-C(=O)-GGVA-NH-B-CH2-OC(=O)-、
-Z1-C(=O)-CH2CH2-C(=O)-GG-(D-)VA-NH-B-CH2-OC(=O)-、
-Z1-C(=O)-CH2CH2-C(=O)-VA-NH-B-CH2-OC(=O)-、
-Z1-C(=O)-(CH2CH2)2-C(=O)-VA-NH-B-CH2-OC(=O)-、
-Z1-C(=O)-CH2CH2-C(=O)-GGPI-NH-B-CH2-OC(=O)-、
-Z1-C(=O)-CH2CH2-C(=O)-GGFG-NH-B-CH2-OC(=O)-、
-Z1-C(=O)-CH2CH2-C(=O)-GGVCit-NH-B-CH2-OC(=O)-、
-Z1-C(=O)-CH2CH2-C(=O)-GGVK-NH-B-CH2-OC(=O)-、
-Z1-C(=O)-CH2CH2-C(=O)-GGPL-NH-B-CH2-OC(=O)-、
-Z1-C(=O)-CH2CH2-C(=O)-NH-(CH2CH2)2-C(=O)-VA-NH-B-CH2-OC(=O)-、
-Z1-C(=O)-CH2CH2-C(=O)-NH-(CH2CH2O)2-CH2-C(=O)-VA-NH-B-CH2-OC(=O)-、
-Z1-C(=O)-CH2CH2-NH-C(=O)-(CH2CH2O)4-CH2CH2-C(=O)-VA-NH-B-CH2-OC(=O)-、
-Z2-OC(=O)-GGVA-NH-B-CH2-OC(=O)-、及び
-Z3-CH2-OC(=O)-GGVA-NH-B-CH2-OC(=O)-
からなる群から選択されるいずれか1つを示し、
ここで、Z1は、以下の構造式:
Z2は、以下の構造式:
Z3は、以下の構造式:
ここで、Z1、Z2及びZ3の構造式において、*はZ1、Z2又はZ3に隣接するC(=O)、O又はCH2と結合していることを示し、波線はAbの糖鎖又はリモデリングされた糖鎖と結合していることを示し、並びに、
Bは、1,4-フェニル基を示す、
[1]~[14]のいずれか1項に記載の抗体-薬物コンジュゲート。
[16]Lが、以下:
-Z1-C(=O)-CH2CH2-C(=O)-GGVA-NH-B-CH2-OC(=O)-、
-Z1-C(=O)-CH2CH2-C(=O)-VA-NH-B-CH2-OC(=O)-、
-Z1-C(=O)-(CH2CH2)2-C(=O)-VA-NH-B-CH2-OC(=O)-、
-Z1-C(=O)-CH2CH2-C(=O)-GGVCit-NH-B-CH2-OC(=O)-、
-Z1-C(=O)-CH2CH2-C(=O)-NH-(CH2CH2)2-C(=O)-VA-NH-B-CH2-OC(=O)-、
-Z1-C(=O)-CH2CH2-C(=O)-NH-(CH2CH2O)2-CH2-C(=O)-VA-NH-B-CH2-OC(=O)-、及び
-Z1-C(=O)-CH2CH2-NH-C(=O)-(CH2CH2O)4-CH2CH2-C(=O)-VA-NH-B-CH2-OC(=O)-
からなる群から選択されるいずれか1つを示し、
ここで、Bは1,4-フェニル基であり、Z1は以下の構造式:
ここで、Z1の構造式において、*はZ1に隣接するC(=O)と結合していることを示し、波線はAbのN297に結合する糖鎖(N297糖鎖)又はそのリモデリングされた糖鎖と結合していることを示す、[1]~[15]のいずれか1項に記載の抗体-薬物コンジュゲート。
[17]抗体が、IgG1、IgG2又はIgG4である、[1]~[16]のいずれか1項に記載の抗体-薬物コンジュゲート。
[18]N297糖鎖が、リモデリングされた糖鎖である、[1]~[17]のいずれか1項に記載の抗体-薬物コンジュゲート。
[19]N297糖鎖が、次式で示される構造を有するN297-(Fuc)MSG1、N297-(Fuc)MSG2もしくはそれらの混合物、又はN297-(Fuc)SGである、[1]~[18]のいずれか1項に記載の抗体-薬物コンジュゲート:
N297糖鎖中の*-L(PEG)-は、*-(CH2CH2-O)n5-CH2CH2-NH-をを示し、
ここで、n5は2~5の整数であることを示し、右端のアミノ基がN297糖鎖のβ-Manの分岐鎖の1-3鎖側又は/及び1-6鎖側の非還元末端のシアル酸の2位のカルボン酸とアミド結合していることを示し、*は、それぞれの構造式におけるトリアゾール環上の1位又は3位の窒素原子と結合していることを示す。
[20]n5が3である、[19]に記載の抗体-薬物コンジュゲート。
[21]次の式(XII):
上記で示されるそれぞれの構造式において、m2は1又は2の整数であることを示し、
Abは配列番号4に記載のアミノ酸配列を含むアミノ酸配列に特異的に結合し、細胞内に取り込まれる内在化能を有する、IgG抗体又は当該抗体の機能性断片を示し、
AbのN297糖鎖は次式で示される構造を有するN297-(Fuc)MSG1、N297-(Fuc)MSG2もしくはそれらの混合物、又はN297-(Fuc)SGのいずれか1つであることを示し、
N297糖鎖中の*-L(PEG)-は、*-(CH2CH2-O)3-CH2CH2-NH-であることを示し、
ここで、右端のアミノ基がN297糖鎖のβ-Manの分岐鎖の1-3鎖側又は/及び1-6鎖側の非還元末端のシアル酸の2位のカルボン酸とアミド結合していることを示し、*は、それぞれの構造式におけるトリアゾール環上の1位又は3位の窒素原子と結合していることを示す、抗体-薬物コンジュゲート。
[22]式(XII)で表される化合物が、次の式(XII’):
[23]次の式(XIII):
上記で示されるそれぞれの構造式において、m2は1又は2の整数であることを示し、
Abは配列番号4に記載のアミノ酸配列を含むアミノ酸配列に特異的に結合し、細胞内に取り込まれる内在化能を有する、IgG抗体又は当該抗体の機能性断片を示し、
AbのN297糖鎖は次式で示される構造を有するN297-(Fuc)MSG1、N297-(Fuc)MSG2もしくはそれらの混合物、又はN297-(Fuc)SGのいずれか1つであることを示し、
N297糖鎖中の*-L(PEG)-は、*-(CH2CH2-O)3-CH2CH2-NH-であることを示し、
ここで、右端のアミノ基がN297糖鎖のβ-Manの分岐鎖の1-3鎖側又は/及び1-6鎖側の非還元末端のシアル酸の2位のカルボン酸とアミド結合していることを示し、*は、それぞれの構造式におけるトリアゾール環上の1位又は3位の窒素原子と結合していることを示す、抗体-薬物コンジュゲート。
[24]式(XIII)で表される化合物が、次の式(XIII’):
[25]次の式(XIV):
上記で示されるそれぞれの構造式において、m2は1又は2の整数であることを示し、
Abは配列番号4に記載のアミノ酸配列を含むアミノ酸配列に特異的に結合し、細胞内に取り込まれる内在化能を有する、IgG抗体又は当該抗体の機能性断片を示し、
AbのN297糖鎖は次式で示される構造を有するN297-(Fuc)MSG1、N297-(Fuc)MSG2もしくはそれらの混合物、又はN297-(Fuc)SGのいずれか1つであることを示し、
N297糖鎖中の*-L(PEG)-は、*-(CH2CH2-O)3-CH2CH2-NH-であることを示し、
ここで、右端のアミノ基がN297糖鎖のβ-Manの分岐鎖の1-3鎖側又は/及び1-6鎖側の非還元末端のシアル酸の2位のカルボン酸とアミド結合していることを示し、*は、それぞれの構造式におけるトリアゾール環上の1位又は3位の窒素原子と結合していることを示す、抗体-薬物コンジュゲート。
[26]式(XIV)で表される化合物が、次の式(XIV’):
[27]次の式(XV):
上記で示されるそれぞれの構造式において、m2は1又は2の整数であることを示し、
Abは配列番号4に記載のアミノ酸配列を含むアミノ酸配列に特異的に結合し、細胞内に取り込まれる内在化能を有する、IgG抗体又は当該抗体の機能性断片を示し、
AbのN297糖鎖は次式で示される構造を有するN297-(Fuc)MSG1、N297-(Fuc)MSG2もしくはそれらの混合物、又はN297-(Fuc)SGのいずれか1つであることを示し、
N297糖鎖中の*-L(PEG)-は、*-(CH2CH2-O)3-CH2CH2-NH-であることを示し、
ここで、右端のアミノ基がN297糖鎖のβ-Manの分岐鎖の1-3鎖側又は/及び1-6鎖側の非還元末端のシアル酸の2位のカルボン酸とアミド結合していることを示し、*は、それぞれの構造式におけるトリアゾール環上の1位又は3位の窒素原子と結合していることを示す、抗体-薬物コンジュゲート。
[28]式(XV)で表される化合物が、次の式(XV’):
[29]前記抗体又は当該抗体の機能性断片が、以下の(1)~(4):
(1)配列番号12に記載のアミノ酸配列からなるCDRL1、配列番号13に記載のアミノ酸配列からなるCDRL2及び配列番号14に記載のアミノ酸配列からなるCDRL3、及び、配列番号17に記載のアミノ酸配列からなるCDRH1、配列番号18に記載のアミノ酸配列からなるCDRH2及び配列番号19に記載のアミノ酸配列からなるCDRH3、
(2)配列番号12に記載のアミノ酸配列からなるCDRL1、配列番号13に記載のアミノ酸配列からなるCDRL2及び配列番号14に記載のアミノ酸配列からなるCDRL3、及び、配列番号17に記載のアミノ酸配列からなるCDRH1、配列番号30に記載のアミノ酸配列からなるCDRH2及び配列番号19に記載のアミノ酸配列からなるCDRH3、
(3)配列番号12に記載のアミノ酸配列からなるCDRL1、配列番号13に記載のアミノ酸配列からなるCDRL2及び配列番号14に記載のアミノ酸配列からなるCDRL3、及び、配列番号57に記載のアミノ酸配列からなるCDRH1、配列番号58に記載のアミノ酸配列からなるCDRH2及び配列番号59に記載のアミノ酸配列からなるCDRH3、及び
(4)配列番号12に記載のアミノ酸配列からなるCDRL1、配列番号13に記載のアミノ酸配列からなるCDRL2及び配列番号14に記載のアミノ酸配列からなるCDRL3、及び、配列番号62に記載のアミノ酸配列からなるCDRH1、配列番号63に記載のアミノ酸配列からなるCDRH2及び配列番号64に記載のアミノ酸配列からなるCDRH3、
からなる群から選択されるCDRL1、CDRL2及びCDRL3、及び、CDRH1、CDRH2及びCDRH3を含む、
[21]~[28]のいずれか1項に記載の抗体-薬物コンジュゲート。
[30]前記抗体又は当該抗体の機能性断片が、以下の(1)~(6):
(1)配列番号33に記載のアミノ酸配列からなる軽鎖可変領域及び配列番号41に記載のアミノ酸配列からなる重鎖可変領域、
(2)配列番号33に記載のアミノ酸配列からなる軽鎖可変領域及び配列番号45に記載のアミノ酸配列からなる重鎖可変領域、
(3)配列番号37に記載のアミノ酸配列からなる軽鎖可変領域及び配列番号45に記載のアミノ酸配列からなる重鎖可変領域、
(4)配列番号33に記載のアミノ酸配列からなる軽鎖可変領域及び配列番号49に記載のアミノ酸配列からなる重鎖可変領域、
(5)配列番号33に記載のアミノ酸配列からなる軽鎖可変領域及び配列番号55に記載のアミノ酸配列からなる重鎖可変領域、又は
(6)配列番号33に記載のアミノ酸配列からなる軽鎖可変領域及び配列番号60に記載のアミノ酸配列からなる重鎖可変領域、
のいずれかの軽鎖可変領域及び重鎖可変領域、
を含む、[21]~[29]のいずれか1項に記載の抗体-薬物コンジュゲート。
[31]前記抗体又は当該抗体の機能性断片が、以下の(1)~(7):
(1)配列番号31の21~233番目のアミノ酸配列からなる軽鎖及び配列番号39の20~471番目のアミノ酸配列からなる重鎖、
(2)配列番号31の21~233番目のアミノ酸配列からなる軽鎖及び配列番号43の20~471番目のアミノ酸配列からなる重鎖、
(3)配列番号35の21~233番目のアミノ酸配列からなる軽鎖及び配列番号43の20~471番目のアミノ酸配列からなる重鎖、
(4)配列番号31の21~233番目のアミノ酸配列からなる軽鎖及び配列番号47の20~471番目のアミノ酸配列からなる重鎖、
(5)配列番号31の21~233番目のアミノ酸配列からなる軽鎖及び配列番号65の20~471番目のアミノ酸配列からなる重鎖、
(6)配列番号31の21~233番目のアミノ酸配列からなる軽鎖及び配列番号67の20~471番目のアミノ酸配列からなる重鎖、又は
(7)配列番号31の21~233番目のアミノ酸配列からなる軽鎖及び配列番号69の20~471番目のアミノ酸配列からなる重鎖、
のいずれかを有する、[21]~[30]のいずれか1項に記載の抗体-薬物コンジュゲート。
[32]前記抗体又は当該抗体の機能性断片が、配列番号31の21~233番目のアミノ酸配列からなる軽鎖及び配列番号39の20~471番目のアミノ酸配列からなる重鎖を有する、[31]に記載の抗体-薬物コンジュゲート。
[33]前記抗体又は当該抗体の機能性断片が、配列番号31の21~233番目のアミノ酸配列からなる軽鎖及び配列番号43の20~471番目のアミノ酸配列からなる重鎖を有する、[31]に記載の抗体-薬物コンジュゲート。
[34]前記抗体又は当該抗体の機能性断片が、配列番号35の21~233番目のアミノ酸配列からなる軽鎖及び配列番号43の20~471番目のアミノ酸配列からなる重鎖を有する、[31]に記載の抗体-薬物コンジュゲート。
[35]前記抗体又は当該抗体の機能性断片が、配列番号31の21~233番目のアミノ酸配列からなる軽鎖及び配列番号47の20~471番目のアミノ酸配列からなる重鎖を有する、[31]に記載の抗体-薬物コンジュゲート。
[36]前記抗体又は当該抗体の機能性断片が、配列番号31の21~233番目のアミノ酸配列からなる軽鎖及び配列番号65の20~471番目のアミノ酸配列からなる重鎖を有する、[31]に記載の抗体-薬物コンジュゲート。
[37]前記抗体又は当該抗体の機能性断片が、配列番号31の21~233番目のアミノ酸配列からなる軽鎖及び配列番号67の20~471番目のアミノ酸配列からなる重鎖を有する、[31]に記載の抗体-薬物コンジュゲート。
[38]前記抗体又は当該抗体の機能性断片が、配列番号31の21~233番目のアミノ酸配列からなる軽鎖及び配列番号69の20~471番目のアミノ酸配列からなる重鎖を有する[31]に記載の抗体-薬物コンジュゲート。
[39]抗体―薬物コンジュゲートにおける抗体1分子あたりの平均薬物結合数が、1~3である、[1]~[38]のいずれか1項に記載の抗体―薬物コンジュゲート。
[41]重鎖がN-結合への糖鎖付加、O-結合への糖鎖付加、N末のプロセッシング、C末のプロセッシング、脱アミド化、アスパラギン酸の異性化、メチオニンの酸化、N末にメチオニン残基の付加、プロリン残基のアミド化及びカルボキシル末端において1つ又は2つのアミノ酸が欠失した重鎖からなる群より選択される1又は2以上の修飾を含む抗体である、[1]~[40]のいずれか1項に記載の抗体―薬物コンジュゲート。
[42]重鎖のカルボキシル末端のリジン残基が欠失した、[1]~[41]のいずれか1項に記載の抗体―薬物コンジュゲート。
[43]以下の工程:
i)配列番号4に記載のアミノ酸配列を含むアミノ酸配列に特異的に結合し、細胞内に取り込まれる内在化能を有する、IgG抗体又は当該抗体の機能性断片を製造する工程、
ii)工程i)で得られた抗体を加水分解酵素で処理し、(Fucα1,6)GlcNAc-抗体を製造する工程、及び、
iii)-1 MSG(9)又はSG(10)のシアル酸の2位のカルボン酸のカルボニル基にアジド基を有するPEGリンカーを導入し、還元末端をオキサゾリン化して得た糖鎖ドナー分子と、糖転移酵素存在下で(Fucα1,6)GlcNAc-抗体を反応させる工程、又は、
iii)-2 α-アミノ基が保護されていてもよい(MSG-)Asn又は(SG-)Asnのシアル酸の2位のカルボン酸のカルボニル基及び前記Asnのカルボン酸のカルボニル基にアジド基を有するPEGリンカーを導入し、加水分解酵素を作用させた後、還元末端をオキサゾリン化して得た糖鎖ドナー分子と、糖転移酵素存在下で(Fucα1,6)GlcNAc-抗体を反応させる工程、
を含む、糖鎖リモデリング抗体の製造方法。
[44][43]に記載の方法により得られた糖鎖リモデリング抗体とドラッグリンカーを反応させる工程を含む、[1]~[42]のいずれか1項に記載の抗体-薬物コンジュゲートの製造方法。
[45][44]に記載の方法で製造された、[1]~[42]のいずれか1項に記載の抗体-薬物コンジュゲート。
[47]配列番号12に記載のアミノ酸配列からなるCDRL1、配列番号13に記載のアミノ酸配列からなるCDRL2及び配列番号14に記載のアミノ酸配列からなるCDRL3を含む軽鎖可変領域、及び、配列番号62に記載のアミノ酸配列からなるCDRH1、配列番号63に記載のアミノ酸配列からなるCDRH2及び配列番号64に記載のアミノ酸配列からなるCDRH3を含む重鎖可変領域を含む、抗体又はその機能性断片。
[48]配列番号33に記載のアミノ酸配列からなる軽鎖可変領域及び配列番号55に記載のアミノ酸配列からなる重鎖可変領域を含む、[46]に記載の抗体又はその機能性断片。
[49]配列番号33に記載のアミノ酸配列からなる軽鎖可変領域及び配列番号60に記載のアミノ酸配列からなる重鎖可変領域を含む、[47]に記載の抗体又はその機能性断片。
[50]配列番号31の21~233番目のアミノ酸配列からなる軽鎖及び配列番号67の20~471番目のアミノ酸配列からなる重鎖を有する、[46]又は[48]に記載の抗体又はその機能性断片。
[51]配列番号31の21~233番目のアミノ酸配列からなる軽鎖及び配列番号69の20~471番目のアミノ酸配列からなる重鎖を有する、[47]又は[49]に記載の抗体又はその機能性断片。
[52]配列番号31の21~233番目のアミノ酸配列からなる軽鎖及び配列番号65の20~471番目のアミノ酸配列からなる重鎖を有する、抗体又はその機能性断片。
[53][46]~[52]のいずれか1項に記載の抗体をコードするポリヌクレオチド。
[55][54]に記載の発現ベクターにより形質転換された宿主細胞。
[56][55]に記載の宿主細胞を培養する工程、及び当該工程で得られた培養物から目的の抗体を採取する工程を含む、[46]~[52]に記載の抗体又は該抗体の機能性断片の製造方法。
[57][56]に記載の製造方法により得られる、抗体又は該抗体の機能性断片。
[58][1]~[42]若しくは[45]のいずれか1項に記載の抗体-薬物コンジュゲート、又は、[46]~[52]若しくは[57]のいずれか1項に記載の抗体又は該抗体の機能性断片を含む、医薬組成物。
[59]抗腫瘍薬である、[58]に記載の医薬組成物。
[60]腫瘍がCDH6が発現している腫瘍である、[59]に記載の医薬組成物。
[61]腫瘍が腎細胞癌、腎淡明細胞癌、乳頭状腎細胞癌、卵巣癌、卵巣漿液性腺癌、甲状腺癌、胆管癌、肺癌、小細胞肺癌、非小細胞肺癌、神経膠芽腫、中皮腫、子宮癌、膵臓癌、ウィルムス腫瘍又は神経芽腫である、[60]に記載の医薬組成物。
[62][1]~[42]若しくは[45]のいずれか1項に記載の抗体-薬物コンジュゲート、[46]~[52]若しくは[57]のいずれか1項に記載の抗体又は該抗体の機能性断片、又は、[58]~[61]のいずれか1項に記載の医薬組成物を個体に投与する工程を含む、腫瘍の治療方法。
[63]腫瘍がCDH6が発現している腫瘍である、[62]に記載の治療方法。
[64]腫瘍が、腎細胞癌、腎淡明細胞癌、乳頭状腎細胞癌、卵巣癌、卵巣漿液性腺癌、甲状腺癌、胆管癌、肺癌、小細胞肺癌、非小細胞肺癌、神経膠芽腫、中皮腫、子宮癌、膵臓癌、ウィルムス腫瘍又は神経芽腫である、[62]又は[63]に記載の治療方法。
[65][1]~[42]若しくは[45]のいずれか1項に記載の抗体-薬物コンジュゲート、[46]~[52]若しくは[57]のいずれか1項に記載の抗体又は該抗体の機能性断片、又は、[58]~[61]のいずれか1項に記載の医薬組成物と少なくとも一つの抗腫瘍薬を、同時に、別々に又は連続して個体に投与する工程を含む、[62]~[64]のいずれか1項に記載の治療方法。
カドヘリンは、細胞膜表面に存在する糖タンパク質で、カルシウムイオン依存的にN末端側の細胞外ドメイン同士が結合することで、細胞間接着分子として、また細胞間相互作用を担うシグナル分子として機能する。カドヘリンスーパーファミリーの内、クラシックカドヘリンに分類される分子群は、細胞外に5個の細胞外ドメイン(ECドメイン)と1個の膜貫通領域、及び細胞内ドメインから構成される1回膜貫通タンパク質である。
本発明の抗CDH6抗体の一例として、配列番号4に示すアミノ酸配列を含むアミノ酸配列を認識し、かつ内在化活性を有する抗CDH6抗体を挙げることができる。本発明の抗CDH6抗体の一例として、配列番号4に示すアミノ酸配列を含むアミノ酸配列を特異的に認識し、かつ内在化活性を有する抗CDH6抗体を挙げることができる。本発明の抗CDH6抗体の一例として、配列番号4に示すアミノ酸配列からなるアミノ酸配列を認識し、かつ内在化活性を有する抗CDH6抗体を挙げることができる。本発明の抗CDH6抗体の一例として、配列番号4に示すアミノ酸配列からなるアミノ酸配列を特異的に認識し、かつ内在化活性を有する抗CDH6抗体を挙げることができる。抗体が「配列番号4に示すアミノ酸配列を含むアミノ酸配列を特異的に認識」する又は「EC3ドメインを特異的に認識」するとは、抗体が、CDH6のEC3ドメインをCDH6の他の細胞外ドメインと比較して強く認識する又は強く結合することをいう。
抗原は抗原タンパク質をコードする遺伝子を遺伝子操作によって宿主細胞に産生させることによって得ることができる。具体的には、抗原遺伝子を発現可能なベクターを作製し、これを宿主細胞に導入して該遺伝子を発現させ、発現した抗原を精製すればよい。上記の遺伝子操作による抗原発現細胞、あるいは抗原を発現している細胞株を動物に免疫する方法を用いることによっても抗体を取得できる。
本発明で使用される抗CDH6抗体は、特に制限はないが、例えば、本願の配列表で示されたアミノ酸配列で特定される抗体を好適に使用することができる。本発明において使用される抗CDH6抗体としては、以下の特性を有するものが望ましい。
(1)以下の特性を有することを特徴とする抗体;
(a)CDH6に特異的に結合する、
(b)CDH6と結合することによってCDH6発現細胞に内在化する活性を有する、
(2)CDH6がヒトCDH6である上記(1)に記載の抗体又は当該抗体、
(3)ヒトCDH6のEC3を特異的に認識し、かつ内在化活性を有する。
(a)CDH6のcDNAを発現ベクター(例えば、pcDNA3.1:Thermo Fisher Scientific)に組み込み、エレクトロポレーションや遺伝子銃等の方法によって、そのベクターを直接被免疫動物(例えば、ラットやマウス)に投与することによって、動物体内においてCDH6を発現させることによって、免疫反応を誘起させることができる。エレクトロポレーション等によるベクターの投与は抗体価を上げるために必要であれば、1回でも複数回でもよく、好ましくは複数回である;
(b)免疫反応を誘起された上述の動物より、抗体産生細胞を含む組織(例えばリンパ節)を採取する;
(c)骨髄腫細胞(以下「ミエローマ」という)(例えば、マウスミエローマSP2/0-ag14細胞)の調製;
(d)抗体産生細胞とミエローマとの細胞融合;
(e)目的とする抗体を産生するハイブリドーマ群の選別;
(f)単一細胞クローンへの分割(クローニング);
(g)場合によっては、モノクローナル抗体を大量に製造するためのハイブリドーマの培養、又はハイブリドーマを移植した動物の飼育;及び/又は
(h)このようにして製造されたモノクローナル抗体の生理活性(内在化活性)、及びその結合特異性の検討、あるいは標識試薬としての特性の検定。
本発明の抗体には、上記CDH6に対するモノクローナル抗体に加え、ヒトに対する異種抗原性を低下させること等を目的として人為的に改変した遺伝子組換え型抗体、例えば、キメラ(Chimeric)抗体、ヒト化(Humanized)抗体又はヒト抗体等も含まれる。これらの抗体は、既知の方法を用いて製造することができる。
配列番号33に示される軽鎖可変領域アミノ酸配列(本明細書中、hL02軽鎖可変領域アミノ酸配列とも称する)を有する軽鎖又は配列番号37に示される軽鎖可変領域アミノ酸配列(本明細書中、hL03軽鎖可変領域アミノ酸配列とも称する)を有する軽鎖、及び、配列番号41に示される重鎖可変領域アミノ酸配列(本明細書中、hH01重鎖可変領域アミノ酸配列とも称する)を有する重鎖、配列番号45に示される重鎖可変領域アミノ酸配列(本明細書中、hH02重鎖可変領域アミノ酸配列とも称する)を有する重鎖、配列番号49に示される重鎖可変領域アミノ酸配列(本明細書中、hH04重鎖可変領域アミノ酸配列とも称する)、配列番号55に示される重鎖可変領域アミノ酸配列(本明細書中、hH11重鎖可変領域アミノ酸配列とも称する)又は配列番号60に示される重鎖可変領域アミノ酸配列(本明細書中、hH31重鎖可変領域アミノ酸配列とも称する)を有する重鎖からなる抗体が挙げられる。
配列番号33に示される軽鎖可変領域アミノ酸配列を有する軽鎖及び配列番号41に示される重鎖可変領域アミノ酸配列を有する重鎖からなる抗体;
配列番号33に示される軽鎖可変領域アミノ酸配列を有する軽鎖及び配列番号45に示される重鎖可変領域アミノ酸配列を有する重鎖からなる抗体;
配列番号33に示される軽鎖可変領域アミノ酸配列を有する軽鎖及び配列番号49に示される重鎖可変領域アミノ酸配列を有する重鎖からなる抗体;
配列番号33に示される軽鎖可変領域アミノ酸配列を有する軽鎖及び配列番号55に示される重鎖可変領域アミノ酸配列を有する重鎖からなる抗体;
配列番号33に示される軽鎖可変領域アミノ酸配列を有する軽鎖及び配列番号60に示される重鎖可変領域アミノ酸配列を有する重鎖からなる抗体;
配列番号37に示される軽鎖可変領域アミノ酸配列を有する軽鎖及び配列番号41に示される重鎖可変領域アミノ酸配列を有する重鎖からなる抗体;
配列番号37に示される軽鎖可変領域アミノ酸配列を有する軽鎖及び配列番号45に示される重鎖可変領域アミノ酸配列を有する重鎖からなる抗体;
配列番号37に示される軽鎖可変領域アミノ酸配列を有する軽鎖及び配列番号49に示される重鎖可変領域アミノ酸配列を有する重鎖からなる抗体;
配列番号37に示される軽鎖可変領域アミノ酸配列を有する軽鎖及び配列番号55に示される重鎖可変領域アミノ酸配列を有する重鎖からなる抗体;又は
配列番号37に示される軽鎖可変領域アミノ酸配列を有する軽鎖及び配列番号60に示される重鎖可変領域アミノ酸配列を有する重鎖からなる抗体;
が挙げられる。
配列番号33に示される軽鎖可変領域アミノ酸配列を有する軽鎖及び配列番号41に示される重鎖可変領域アミノ酸配列を有する重鎖からなる抗体;
配列番号33に示される軽鎖可変領域アミノ酸配列を有する軽鎖及び配列番号45に示される重鎖可変領域アミノ酸配列を有する重鎖からなる抗体;
配列番号33に示される軽鎖可変領域アミノ酸配列を有する軽鎖及び配列番号49に示される重鎖可変領域アミノ酸配列を有する重鎖からなる抗体;
配列番号37に示される軽鎖可変領域アミノ酸配列を有する軽鎖及び配列番号45に示される重鎖可変領域アミノ酸配列を有する重鎖からなる抗体;
配列番号33に示される軽鎖可変領域アミノ酸配列を有する軽鎖及び配列番号55に示される重鎖可変領域アミノ酸配列を有する重鎖からなる抗体;又は
配列番号33に示される軽鎖可変領域アミノ酸配列を有する軽鎖及び配列番号60に示される重鎖可変領域アミノ酸配列を有する重鎖からなる抗体;
が挙げられる。
配列番号31に示される軽鎖全長アミノ酸配列(本明細書中、hL02軽鎖全長アミノ酸配列とも称する)の21~233番目のアミノ酸配列からなる軽鎖又は配列番号35に示される軽鎖全長アミノ酸配列(本明細書中、hL03軽鎖全長アミノ酸配列とも称する)の21~233番目のアミノ酸配列からなる軽鎖、及び、
配列番号39に示される重鎖全長アミノ酸配列(本明細書中、hH01重鎖全長アミノ酸配列とも称する)の20~471番目のアミノ酸配列からなる重鎖、配列番号43に示される重鎖全長アミノ酸配列(本明細書中、hH02重鎖全長アミノ酸配列とも称する)の20~471番目のアミノ酸配列からなる重鎖、配列番号47に示される重鎖全長アミノ酸配列(本明細書中、hH04重鎖全長アミノ酸配列とも称する)の20~471番目のアミノ酸配列からなる重鎖、配列番号65に示される重鎖全長アミノ酸配列(本明細書中、hH01Aの重鎖全長アミノ酸配列とも称する)の20~471番目のアミノ酸配列からなる重鎖、配列番号67に示される重鎖全長アミノ酸配列(本明細書中、hH11Aの重鎖全長アミノ酸配列とも称する)の20~471番目のアミノ酸配列からなる重鎖又は配列番号69に示される重鎖全長アミノ酸配列(本明細書中、hH31Aの重鎖全長アミノ酸配列とも称する)の20~471番目のアミノ酸配列からなる重鎖
からなる抗体が挙げられる。
配列番号31に示される軽鎖全長アミノ酸配列の21~233番目のアミノ酸配列からなる軽鎖及び配列番号39に示される重鎖全長アミノ酸配列の20~471番目のアミノ酸配列からなる重鎖からなる抗体;
配列番号31に示される軽鎖全長アミノ酸配列の21~233番目のアミノ酸配列からなる軽鎖及び配列番号43に示される重鎖全長アミノ酸配列の20~471番目のアミノ酸配列からなる重鎖からなる抗体;
配列番号31に示される軽鎖全長アミノ酸配列の21~233番目のアミノ酸配列からなる軽鎖及び配列番号47に示される重鎖全長アミノ酸配列の20~471番目のアミノ酸配列からなる重鎖からなる抗体;
配列番号31に示される軽鎖全長アミノ酸配列の21~233番目のアミノ酸配列からなる軽鎖及び配列番号65に示される重鎖全長アミノ酸配列の20~471番目のアミノ酸配列からなる重鎖からなる抗体;
配列番号31に示される軽鎖全長アミノ酸配列の21~233番目のアミノ酸配列からなる軽鎖及び配列番号67に示される重鎖全長アミノ酸配列の20~471番目のアミノ酸配列からなる重鎖からなる抗体;
配列番号31に示される軽鎖全長アミノ酸配列の21~233番目のアミノ酸配列からなる軽鎖及び配列番号69に示される重鎖全長アミノ酸配列の20~471番目のアミノ酸配列からなる重鎖からなる抗体;
配列番号35に示される軽鎖全長アミノ酸配列の21~233番目のアミノ酸配列からなる軽鎖及び配列番号39に示される重鎖全長アミノ酸配列の20~471番目のアミノ酸配列からなる重鎖からなる抗体;
配列番号35に示される軽鎖全長アミノ酸配列の21~233番目のアミノ酸配列からなる軽鎖及び配列番号43に示される重鎖全長アミノ酸配列の20~471番目のアミノ酸配列からなる重鎖からなる抗体;
配列番号35に示される軽鎖全長アミノ酸配列の21~233番目のアミノ酸配列からなる軽鎖及び配列番号47に示される重鎖全長アミノ酸配列の20~471番目のアミノ酸配列からなる重鎖からなる抗体;
配列番号35に示される軽鎖全長アミノ酸配列の21~233番目のアミノ酸配列からなる軽鎖及び配列番号65に示される重鎖全長アミノ酸配列の20~471番目のアミノ酸配列からなる重鎖からなる抗体;
配列番号35に示される軽鎖全長アミノ酸配列の21~233番目のアミノ酸配列からなる軽鎖及び配列番号67に示される重鎖全長アミノ酸配列の20~471番目のアミノ酸配列からなる重鎖からなる抗体;又は
配列番号35に示される軽鎖全長アミノ酸配列の21~233番目のアミノ酸配列からなる軽鎖及び配列番号69に示される重鎖全長アミノ酸配列の20~471番目のアミノ酸配列からなる重鎖からなる抗体;
が挙げられる。
配列番号31に示される軽鎖全長アミノ酸配列の21~233番目のアミノ酸配列からなる軽鎖及び配列番号39に示される重鎖全長アミノ酸配列の20~471番目のアミノ酸配列からなる重鎖からなる抗体(本明細書中、「H01L02抗体」又は「H01L02」とも称する);
配列番号31に示される軽鎖全長アミノ酸配列の21~233番目のアミノ酸配列からなる軽鎖及び配列番号43に示される重鎖全長アミノ酸配列の20~471番目のアミノ酸配列からなる重鎖からなる抗体(本明細書中、「H02L02抗体」又は「H02L02」とも称する);
配列番号31に示される軽鎖全長アミノ酸配列の21~233番目のアミノ酸配列からなる軽鎖及び配列番号47に示される重鎖全長アミノ酸配列の20~471番目のアミノ酸配列からなる重鎖からなる抗体(本明細書中、「H04L02抗体」又は「H04L02」とも称する);
配列番号35に示される軽鎖全長アミノ酸配列の21~233番目のアミノ酸配列からなる軽鎖及び配列番号43に示される重鎖全長アミノ酸配列の20~471番目のアミノ酸配列からなる重鎖からなる抗体(本明細書中、「H02L03抗体」又は「H02L03」とも称する);
配列番号31に示される軽鎖全長アミノ酸配列の21~233番目のアミノ酸配列からなる軽鎖及び配列番号65に示される重鎖全長アミノ酸配列の20~471番目のアミノ酸配列からなる重鎖からなる抗体(本明細書中、「H01L02A抗体」又は「H01L02A」とも称する);
配列番号31に示される軽鎖全長アミノ酸配列の21~233番目のアミノ酸配列からなる軽鎖及び配列番号67に示される重鎖全長アミノ酸配列の20~471番目のアミノ酸配列からなる重鎖からなる抗体(本明細書中、「H11L02A抗体」又は「H11L02A」とも称する);又は
配列番号31に示される軽鎖全長アミノ酸配列の21~233番目のアミノ酸配列からなる軽鎖及び配列番号69に示される重鎖全長アミノ酸配列の20~471番目のアミノ酸配列からなる重鎖からなる抗体(本明細書中、「H31L02A抗体」又は「H31L02A」とも称する);
が挙げられる。
(a)本発明のCDH6抗体の重鎖アミノ酸配列をコードするポリヌクレオチドと軽鎖アミノ酸配列をコードするポリヌクレオチドの組み合わせ、
(b)本発明のCDH6抗体のいずれか一つの抗体のCDRH1~CDRH3を含む重鎖アミノ酸配列をコードするポリヌクレオチドとCDRL1~CDRL3を含む軽鎖アミノ酸配列をコードするポリヌクレオチドの組み合わせ
(c)本発明のCDH6抗体の重鎖可変領域のアミノ酸配列を含む重鎖アミノ酸配列をコードするポリヌクレオチドと軽鎖可変領域のアミノ酸配列を含む軽鎖アミノ酸配列をコードするポリヌクレオチドの組み合わせ
(d)(a)~(c)のいずれか一つに記載のポリヌクレオチドに相補的なポリヌクレオチドからなるヌクレオチドとストリンジェントな条件下でハイブリダイズし、且つ、CDH6に結合する抗体のアミノ酸配列をコードするポリヌクレオチド、及び、
(e)(a)~(c)のいずれか一つに記載のポリヌクレオチドにおいて1~50個、1~45個、1~40個、1~35個、1~30個、1~25個、1~20個、1~15個、1~10個、1~8個、1~6個、1~5個、1~4個、1~3個、1若しくは2個、または1個のアミノ酸が置換、欠失、付加または挿入してなるポリペプチドのアミノ酸配列をコードし、且つ、CDH6に結合する抗体のアミノ酸配列をコードするポリヌクレオチド。
本発明の抗体薬物コンジュゲートは、次式:
Abは、配列番号4に記載のアミノ酸配列を含むアミノ酸配列に特異的に結合し、細胞内に取り込まれる内在化能を有する、IgG抗体又は当該抗体の機能性断片を示し、
Lは、AbのN297に結合する糖鎖(N297)とDを連結するリンカーであり、
Dは、以下:
で表される。
上記「2.抗CDH6抗体の製造」にて取得された抗CDH6抗体はリンカー構造部分を介して薬物を結合させることによって、抗CDH6抗体-薬物コンジュゲートとすることができる。薬物としては、リンカー構造に結合できる置換基、部分構造を有するものであれば特に制限はない。抗CDH6抗体-薬物コンジュゲートは結合する薬物に応じて種々の用途に用いることができる。そのような薬物の例としては、抗腫瘍活性を有する物質、血液疾患に対する効果を有する物質、自己免疫疾患に対する効果を有する物質、抗炎症物質、抗菌物質、抗真菌物質、抗寄生虫物質、抗ウイルス物質、抗麻酔物質等を挙げることができる。
本発明の抗CDH6抗体-薬物コンジュゲートに結合される化合物として抗腫瘍性化合物を用いる例について以下に述べる。抗腫瘍性化合物としては、抗腫瘍効果を有する化合物であって、リンカー構造に結合できる置換基、部分構造を有するものであれば特に制限はない。抗腫瘍性化合物は、リンカーの一部又は全部が腫瘍細胞内で切断されて抗腫瘍性化合物部分が遊離されて抗腫瘍効果が発現される。リンカーが薬物との結合部分で切断されれば抗腫瘍性化合物が本来の構造で遊離され、その本来の抗腫瘍効果が発揮される。当該遊離薬物として実施例10-7~10-10に記載の薬物1~4が挙げられる。
<リンカー構造>
本発明の抗体-薬物コンジュゲートにおいて抗腫瘍性薬物を抗体に結合するリンカー構造について説明する。
-Lb-La-Lp-NH-B-CH2-O(C=O)-*
で示される。
これらのアミノ酸は重複してもよく、任意に選択されたアミノ酸を含むアミノ酸配列を有する。また、アミノ酸の種類によって、薬物遊離のパターンをコントロールすることができる。
-GGVA-、-GG-(D-)VA-、-VA-、-GGFG-、-GGPI-、-GGVCit-、-GGVK-、-GG(D-)PI-、-GGPL-、-EGGVA、-PI-、-GGF-、DGGF-、(D-)D-GGF-、-EGGF-、-SGGF-、-KGGF-、-DGGFG-、-GGFGG-、-DDGGFG-、-KDGGFG-、-GGFGGGF-
を挙げることができる。
-GGVA-、-GG-(D-)VA-、-VA-、-GGFG-、-GGPI-、-GGVCit-、-GGVK-、-GG(D-)PI-、-GGPL-
リンカーLpは、より好ましくは、以下である。
Lbは、Laと抗体Abの糖鎖又はリモデリングされた糖鎖を結合するスペーサーを示す。
-C(=O)-CH2CH2-C(=O)-、
-C(=O)-(CH2CH2)2-C(=O)-、
-C(=O)-CH2CH2-C(=O)-NH-(CH2CH2)2-C(=O)-、
-C(=O)-CH2CH2-C(=O)-NH-(CH2CH2O)2-CH2-C(=O)-、
-C(=O)-CH2CH2-NH-C(=O)-(CH2CH2O)4-CH2CH2-C(=O)-、
-CH2-OC(=O)-、及び、
-OC(=O)-、
からなる群から選択されるいずれか一つを示し、Laは、より好ましくは、-C(=O)-CH2CH2-C(=O)-、又は、-C(=O)-(CH2CH2)2-C(=O)-である。
Lが、以下の群:
-Z1-C(=O)-CH2CH2-C(=O)-GGVA-NH-B-CH2-OC(=O)-、
-Z1-C(=O)-CH2CH2-C(=O)-GG-(D-)VA-NH-B-CH2-OC(=O)-、
-Z1-C(=O)-CH2CH2-C(=O)-VA-NH-B-CH2-OC(=O)-、
-Z1-C(=O)-(CH2CH2)2-C(=O)-VA-NH-B-CH2-OC(=O)-、
-Z1-C(=O)-CH2CH2-C(=O)-GGPI-NH-B-CH2-OC(=O)-、
-Z1-C(=O)-CH2CH2-C(=O)-GGFG-NH-B-CH2-OC(=O)-、
-Z1-C(=O)-CH2CH2-C(=O)-GGVCit-NH-B-CH2-OC(=O)-、
-Z1-C(=O)-CH2CH2-C(=O)-GGVK-NH-B-CH2-OC(=O)-、
-Z1-C(=O)-CH2CH2-C(=O)-GGPL-NH-B-CH2-OC(=O)-、
-Z1-C(=O)-CH2CH2-C(=O)-NH-(CH2CH2)2-C(=O)-VA-NH-B-CH2-OC(=O)-、
-Z1-C(=O)-CH2CH2-C(=O)-NH-(CH2CH2O)2-CH2-C(=O)-VA-NH-B-CH2-OC(=O)-、
-Z1-C(=O)-CH2CH2-NH-C(=O)-(CH2CH2O)4-CH2CH2-C(=O)-VA-NH-B-CH2-OC(=O)-、
-Z2-OC(=O)-GGVA-NH-B-CH2-OC(=O)-、及び
-Z3-CH2-OC(=O)-GGVA-NH-B-CH2-OC(=O)-から選択され、
ここで、Z1は、以下の構造式:
Z2は、以下の構造式:
Z3は、以下の構造式:
ここで、Z1、Z2及びZ3の構造式において、*はZ1、Z2又はZ3に隣接するC(=O)、O又はCH2と結合していることを示し、波線はAbの糖鎖又はリモデリングされた糖鎖と結合していることを示し、並びに、
Bは、1,4-フェニル基を示す。
近年、不均一な抗体の糖タンパク質を、酵素反応等によってリモデリングし、官能基を有する糖鎖を均一に導入する方法が報告されている(ACS Chemical Biology 2012,7,110、ACS Medicinal Chemistry Letters 2016,7,1005)。この糖鎖リモデリング技術を用いて、部位特異的に薬物を導入し、均一なADCを合成する試みもなされている(Bioconjugate Chemistry 2015,26,2233、Angew.Chem.Int.Ed.2016,55,2361-2367、US2016361436)。
L(PEG)は、-(CH2CH2-O)n5-CH2CH2-NH-を示し、右端のアミノ基がN297糖鎖のβ-Manの分岐鎖の1-3鎖側の非還元末端のシアル酸の2位のカルボン酸とアミド結合していることを示し、
*は、前記リンカーL、特にリンカーLにおけるLbの1,2,3-トリアゾール環上の1位又は3位の窒素原子と結合していることを示し、
ここで、n5は2~10の整数であり、好ましくは、2~5の整数である。
L(PEG)は、-(CH2CH2-O)n5-CH2CH2-NH-を示し、右端のアミノ基がN297糖鎖のβ-Manの分岐鎖の1-6鎖側の非還元末端のシアル酸の2位のカルボン酸とアミド結合していることを示し、
*は、前記リンカーL、特にリンカーLにおけるLbの1,2,3-トリアゾール環上の1位又は3位の窒素原子と結合していることを示し、
ここで、n5は2~10の整数であり、好ましくは、2~5の整数である。
L(PEG)は、-(CH2CH2-O)n5-CH2CH2-NH-を示し、右端のアミノ基がN297糖鎖のβ-Manの分岐鎖の1-3鎖側及び1-6鎖側の両方の非還元末端のシアル酸の2位のカルボン酸とアミド結合していることを示し、*は、前記リンカーL、特にリンカーLにおけるLbの1,2,3-トリアゾール環上の1位又は3位の窒素原子と結合していることを示し、
ここで、n5は2~10の整数であり、好ましくは、2~5の整数である。
糖鎖リモデリング抗体、例えばWO2013/120066などに記載の方法に準じて、次式に示すような方法で製造することができる。
本工程は目的の抗体に対して、公知の酵素反応を用いて抗体のアミノ酸配列297番目のアスパラギンに結合するN結合型糖鎖(N297結合糖鎖)を切断し、糖鎖切断抗体を調製する工程である。
本工程は上述の(Fucα1,6)GlcNAc抗体に対し、酵素反応を用いてアジド基を含むPEGリンカーを有するMSG(MSG1、MSG2)又はSG型糖鎖オキサゾリン体(以下、「アジド糖鎖オキサゾリン体」)を結合させ、糖鎖リモデリング抗体を製造する工程である。
Amicon Ultra(30,000乃至50,000 MWCO,Millipore Co.)の容器内に抗体又は抗体-薬物コンジュゲート溶液を入れ、遠心機(Allegra X-15R,Beckman Coulter,Inc.)を用いた遠心操作(2000G乃至4000Gで5乃至20分間遠心)にて、抗体および後述する抗体-薬物コンジュゲート溶液を濃縮した。
UV測定器(Nanodrop 1000,Thermo Fisher Scientific Inc.)を用いて、メーカー規定の方法に従い、抗体濃度の測定を行った。その際に、抗体ごとに異なる280nm吸光係数(1.3mLmg-1cm-1乃至1.8mLmg-1cm-1)を用いた。
抗体水溶液は緩衝溶液(リン酸緩衝生理食塩水(pH6.0)、リン酸緩衝液(pH6.0)等)を加え共通操作Aを用いて濃縮した。この操作を数回行った後、共通操作Bを用いて抗体濃度の測定を行い、緩衝溶液(リン酸緩衝生理食塩水(pH6.0)、リン酸緩衝液(pH6.0)等)を用いて10mg/mLに抗体濃度を調整した。
本製造法は、上述の糖鎖リモデリング抗体と製造中間体(2)をSPAAC(strain-promoted alkyne azide cycloaddition :J. AM. CHEM. SOC. 2004, 126, 15046-15047)反応により結合させ、抗体-薬物コンジュゲートを製造する方法である。
La’、Lp’、B’は、La、Lp、Bと同義であり、
Jは、以下で示されるいずれかの構造式を示し、
式中、アステリスクはLa’と結合していることを示す。
市販のSorbitol(5%)を含む酢酸緩衝液(10mM,pH5.5;本明細書でABSと称する)のいずれかの緩衝液でNAP-25カラムを平衡化させた。このNAP-25カラムに、抗体-薬物コンジュゲート反応水溶液(約1.5~2.5mL)をのせ、メーカー規定の量の緩衝液で溶出させることで、抗体画分を分取した。この分取画分を再びNAP-25カラムにのせ、緩衝液で溶出させるゲルろ過精製操作を計2乃至3回繰り返すことで、未結合の薬物リンカーやジメチルスルホキシド、プロピレングリコールを除いた抗体-薬物コンジュゲートを得た。必要に応じて、共通操作AおよびCにより抗体-薬物コンジュゲート溶液の濃度を調製した。
抗体-薬物コンジュゲートにおける結合薬物濃度は、下記に示すランベルト・ベールの法則を用いて、算出することができる。
以下にランバルトベールの法則を用いた式(I)を示す。
上記式(I)より抗体-薬物コンジュゲートのモル濃度C(mol・L-1)は以下の式(II)で求められる。
抗体薬物コンジュゲートのモル吸光係数ε280は、以下の式(IV)によって求めることができる。
εAb,280は抗体のアミノ酸配列から、既知の計算方法(Protein Science,1995,vol.4,2411-2423)によって推定することができる値を用いた。実施例において、H01L02抗体のモル吸光係数は、εAb,280=223400(計算推定値)を用いた。H01L02A抗体のモル吸光係数は、εAb,280=223674(計算推定値)、H31L02A抗体のモル吸光係数は、εAb,280=223314(計算推定値)、H11L02A抗体のモル吸光係数は、εAb,280=220490(計算推定値)、LPS抗体のモル吸光係数は、εAb,280=230300(計算推定値)を、を用いた。
εDL,280は、都度UV測定で得た実測値より算出したものを使用した。すなわち、コンジュゲート前駆体(薬物)をあるモル濃度に溶解させた溶液の吸光度を測定し、ランベルト・ベールの法則、式(I)を適用することで得られる値を使用した。
抗体-薬物コンジュゲートにおける抗体一分子あたりの平均薬物結合数は、以下の方法を用いる高速液体クロマトグラフィー(HPLC)分析によって求めることができる。
抗体-薬物コンジュゲート溶液(約1mg/mL、60μL)をジチオトレイトール(DTT)水溶液(100mM、15μL)と混合する。混合物を37℃で30分インキュベートすることで、抗体-薬物コンジュゲートのL鎖及びH鎖間のジスルフィド結合を切断したサンプルを、HPLC分析に用いる。
HPLC分析を、下記の測定条件にて行う。
検出器:紫外吸光度計(測定波長:280nm、329nm)
カラム:BEH Phenyl(2.1×50mm、1.7μm、Waters Acquity)
カラム温度:75℃
移動相A:0.1%トリフルオロ酢酸(TFA),15%イソプロピルアルコール水溶液
移動相B:0.075%TFA、15%イソプロピルアルコールアセトニトリル溶液
グラジエントプログラム:14%-36%(0分-15分)、36%-80%(15-17分)、80%-14%(17分―17.1分)、14%-14%(17.1分―23分)
サンプル注入量:5μL
(F-3.データ解析)
(F-3-1) 薬物の結合していない抗体のL鎖(L0)及びH鎖(H0)に対して、薬物の結合したH鎖(薬物が一つ結合したH鎖:H1、薬物が一つ結合したH鎖:H2)は、結合した薬物の数に比疎水性が増して保持時間が大きくなることから、L0、H0、H1、H2の順に溶出されることからL0及びH0との保持時間比較により検出ピークをL0、H0、H1、H2のいずれかに割り当てることができる。また薬物が結合しているかは、薬物の特徴的な329nmの波長吸収でも確認できる。
上記、「2.抗CDH6抗体の製造」の項及び実施例に記載された本発明の抗CDH6抗体及び当該抗体の機能性断片は、腫瘍細胞表面のCDH6に結合し、内在化活性を有することから、単独であるいは他の薬剤と組み合わせて、医薬として、腎細胞腫瘍及び卵巣腫瘍等のがん、例えば、腎細胞癌、腎淡明細胞癌、乳頭状腎細胞癌、卵巣癌、卵巣漿液性腺癌、甲状腺癌、胆管癌、肺癌(例えば、小細胞肺癌又は非小細胞肺癌)、神経膠芽腫、中皮腫、子宮癌、膵臓癌、ウィルムス腫瘍又は神経芽腫の治療剤として用いることができる。
1)-1 ヒトおよびカニクイザルCDH6発現ベクターの構築
ヒトCDH6タンパク質(NP_004923)をコードするcDNA発現ベクター(OriGene社、RC217889)を用いて、当業者に公知な方法に従い哺乳動物発現用ベクターに組み込むことによってヒトCDH6発現ベクターpcDNA3.1-hCDH6が作製された。ヒトCDH6 ORF(Open Reading Frame)のアミノ酸配列を配列番号1に示す。
免疫にはWKY/Izmラットの雌(日本エスエルシー社)を使用した。まずラット両足下腿部をHyaluronidase(SIGMA-ALDRICH社)にて前処理後、同部位に実施例1)- 1で作製したヒトCDH6発現ベクターpcDNA3.1-hCDH6を筋肉内注射した。続けて、ECM830(BTX社)を使用し、2ニードル電極を用いて、同部位にインビボエレクトロポレーションを実施した。約二週間に一度、同様のインビボエレクトロポーレーションを繰り返した後、ラットのリンパ節又は脾臓を採取しハイブリドーマ作製に用いた。
リンパ節細胞あるいは脾臓細胞とマウスミエローマSP2/0-ag14細胞(ATCC, No.CRL-1 581)とをLF301 Cell Fusion Unit(BEX社)を用いて電気細胞融合した後、ClonaCell-HY Selection Medium D(StemCell Technologies社)に懸濁し、希釈して37℃、5% CO2の条件下で培養した。出現した各々のハイブリドーマコロニーは、モノクローンとして回収され、ClonaCell-HY Selection Medium E(StemCell Technologies社)に懸濁して37℃、5% CO2の条件下で培養した。適度に細胞が増殖した後、各々のハイブリドーマ細胞の凍結ストックを作製すると共に、得られたハイブリドーマ培養上清を抗ヒトCDH6抗体産生ハイブリドーマのスクリーニングに用いた。
1)-4-1 Cell-ELISA用抗原遺伝子発現細胞の調製
293α細胞(インテグリンαv及びインテグリンβ3を発現するHEK293由来の安定発現細胞株)を10% FBS含有DMEM培地中5x105細胞/mLになるよう調製した。Lipofectamine 2000(Thermo Fisher Scienftific社)を用いた形質移入手順に従って、この293α細胞に対して、pcDNA3.1-hCDH6もしくはpcDNA3.1-cynoCDH6または、陰性コントロールとしてpcDNA3.1のDNAを導入し、96-well plate(Corning社)に100μLずつ分注後、10% FBS含有DMEM培地中で37℃、5% CO2の条件下で24から27時間培養した。得られた形質移入細胞を接着状態のまま、Cell-ELISAに使用した。
実施例1)-4-1で調製した発現ベクター導入293α細胞の培養上清を除去後、pcDNA3.1-hCDH6もしくはpcDNA3.1-cynoCDH6またはpcDNA3.1導入293α細胞の各々に対しハイブリドーマ培養上清を添加し、4℃で1時間静置した。well中の細胞を5% FBS含有PBS(+)で1回洗浄後、5% FBS含有PBS(+)で500倍に希釈したAnti-Rat IgG-Peroxidase antibody produced in rabbit(SIGMA社)を加えて、4℃で1時間静置した。well中の細胞を5% FBS含有PBS(+)で3回洗浄した後、OPD発色液(OPD溶解液(0.05 M クエン酸3ナトリウム、0.1M リン酸水素2ナトリウム・12水 pH4.5)にo-フェニレンジアミン二塩酸塩(和光純薬社)、H2O2をそれぞれ0.4mg/mL、0.6%(v/v)になるように溶解)を100μL/wellで添加した。時々攪拌しながら発色反応を行い、1M HClを100μL/wellで添加して発色反応を停止させた後、プレートリーダー(ENVISION:PerkinElmer社)で490nmの吸光度を測定した。コントロールのpcDNA3.1導入293α細胞と比較し、pcDNA3.1-hCDH6ならびにpcDNA3.1-cynoCDH6発現ベクター導入293α細胞の方でより高い吸光度を示す培養上清を産生するハイブリドーマをヒト、かつ、カニクイサルCDH6に結合する抗体産生ハイブリドーマとして選択した。
1)-5-1 フローサイトメトリー解析用抗原遺伝子発現細胞の調製
293T細胞を5×104細胞/cm2になるよう225cm2フラスコ(住友ベークライト社)に播種し、10% FBS含有DMEM培地中で37℃、5% CO2の条件下で一晩培養した。この293T細胞に、pcDNA3.1-cynoCDH6または、陰性コントロールとしてpcDNA3.1をLipofectamine 2000を用いて導入し、37℃、5% CO2の条件下でさらに一晩培養した。各ベクターを導入した293T細胞をTrypLE Express(Thermo Fisher Scienftific社)で処理し、10% FBS含有DMEMで細胞を洗浄した後、5% FBS含有PBSに懸濁した。得られた細胞懸濁液をフローサイトメトリー解析に使用した。
実施例1)-4のCell-ELISAで選択されたヒト、かつ、カニクイサルCDH6に結合する抗体産生ハイブリドーマが産生する抗体のカニクイサルCDH6に対する結合特異性をフローサイトメトリー法によりさらに確認した。実施例1)-5-1で調製した一過性発現293T細胞の懸濁液を遠心し、上清を除去した後、各々に対しハイブリドーマ培養上清を加えて懸濁し、4℃で1時間静置した。5% FBS含有PBSで2回洗浄した後、5% FBS含有PBSで500倍に希釈したAnti-Rat IgG FITC conjugate(SIGMA社)を加えて懸濁し、4℃で1時間静置した。5% FBS含有PBSで2回洗浄した後、2μg/mL 7-aminoactinomycin D(Molecular Probes社)を含む5% FBS含有PBSに再懸濁し、フローサイトメーター(FC500:BeckmanCoulter社)で検出した。データ解析はFlowJo(TreeStar社)で行った。7-aminoactinomycin D陽性の死細胞をゲートで除外した後、生細胞のFITC蛍光強度のヒストグラムを作成した。コントロールであるpcDNA3.1導入293T細胞の蛍光強度ヒストグラムに対しpcDNA3.1-cynoCDH6導入293T細胞のヒストグラムが強蛍光強度側にシフトしている抗体を産生するハイブリドーマを細胞膜表面上に発現するカニクイサルCDH6に特異的に結合する抗体産生ハイブリドーマとして選択した。
実施例1)- 5で選択したラット抗CDH6抗体産生ハイブリドーマの中から、ヒトならびにサルCDH6に強く特異的に結合することが示唆されたクローンrG019を選抜し、各抗体のアイソタイプを同定した。抗体の重鎖のサブクラス、軽鎖のタイプは、RAT MONOCLONAL ANTIBODY ISOTYPING TEST KIT(DSファーマバイオメディカル社)により決定された。その結果、rG019のサブクラスは、IgG2b、タイプはκ鎖であることが確認された。
1)-7-1 培養上清作製
ラット抗ヒトCDH6モノクローナル抗体は、ハイブリドーマ培養上清から精製した。まず、ラット抗CDH6モノクローナル抗体産生ハイブリドーマをClonaCell-HY Selection Medium E(StemCell Technologies社)で充分量まで増殖させた後、Ultra Low IgG FBS(Thermo Fisher Scienftific社)を20%添加したHybridoma SFM(Thermo Fisher Scienftific社)に培地交換し、4-5日間培養した。本培養上清を回収し、0.8μmのフィルターに通した後、さらに0.2μmのフィルターに通して不溶物を除去した。
実施例1)-7-1で作製したハイブリドーマの培養上清からラット抗CDH6抗体rG019をProtein Gアフィニティークロマトグラフィーで精製した。Protein Gカラム(GE Healthcare Bioscience社)に抗体を吸着させ、PBSでカラムを洗浄後に0.1M グリシン/塩酸水溶液(pH2.7)で溶出した。溶出液に1M Tris-HCl(pH9.0)を加えてpH7.0~7.5に調整した後に、Centrifugal UF Filter Device VIVASPIN20(分画分子量UF30K、Sartorius社)にてHBSor(25mM ヒスチジン/5% ソルビトール、pH6.0)へのバッファー置換を行うとともに抗体の濃縮を行い、抗体濃度を1mg/mLに調製した。最後にMinisart-Plus filter(Sartorius社)でろ過し、精製サンプルとした。
2)-1 フローサイトメトリーによるラット抗CDH6抗体の結合能評価
実施例1)-7で作製したラット抗CDH6抗体のヒトCDH6結合性をフローサイトメトリー法により評価した。実施例1)-1で作製したpcDNA3.1-hCDH6を293T細胞(ATCC)にLipofectamine 2000(Thermo Fisher Scientific)を用いて一過性に導入し、37℃、5% CO2の条件下で一晩培養した後、TrypLE Express(Thermo Fisher Scienftific社)で処理し細胞懸濁液を調製した。遺伝子導入した293T細胞懸濁液を遠心し、上清を除去した後、実施例1)-7で調製したラット抗CDH6モノクローナル抗体rG019又はラットIgGコントロール(R&D Systems)を終濃度10ng/mL加えて懸濁し、4℃で1時間静置した。5% FBS含有PBSで2回洗浄した後、5% FBS含有PBSで50倍に希釈したAnti-Rat IgG(whole molecule)-FITC antibody produced in rabbit(SIGMA)を加えて懸濁し、4℃で1時間静置した。5% FBS含有PBSで2回洗浄した後、フローサイトメーター(FC500:Beckman Coulter)で検出を行った。データ解析はFlowJo(TreeStar)で行った。その結果を図1に示す。図1のヒストグラムにおいて、横軸は抗体結合量を表すFITCの蛍光強度、縦軸は細胞数を示す。網掛けで示すヒストグラムはhCDH6を導入していない陰性コントロール293T細胞を用いた場合を示し、白抜き実線で示すヒストグラムは、hCDH6導入293T細胞を用いた場合を示す。細胞表面のhCDH6に抗体が結合したことによって蛍光強度が増強したことを示す。ラットIgGコントロールはいずれの細胞にも結合しない。この結果、作製したラット抗CDH6モノクローナル抗体4種はpcDNA3.1-hCDH6導入293T細胞に結合することを確認した。
2)-2-1 ヒトCDH6各ドメイン欠失体発現ベクターの構築
ヒトCDH6の細胞外全長には5つの細胞外ドメイン、EC1(配列番号2)、EC2(配列番号3)、EC3(配列番号4)、EC4(配列番号5)、EC5(配列番号6)が存在する。ヒトCDH6全長から、5つのECドメインを各一箇所ずつ欠失発現した遺伝子をGeneArt社で合成し、当業者に公知な方法に従い哺乳動物発現用ベクターp3xFLAG-CMV-9ベクター(SIGMA-ALDRICH社)へ組み込み、EC1からEC5をそれぞれ欠失した、各ドメイン欠失体発現ベクターを作製した。
各ECドメイン欠失ベクターを導入した293α細胞株を用いたフローサイトメトリー解析により、ラット抗ヒトCDH6抗体の結合エピトープを同定した。インテグリンαvおよびインテグリンβ3発現ベクターをHEK293細胞内に安定形質移入した細胞株293α細胞株に対して、実施例2)-2-1で作成した各ドメイン欠失体発現ベクター、及び全長ヒトCDH6を発現するpcDNA3.1-hCDH6をLipofectamine 2000(Thermo Fisher Scientific)を用いて一過性に導入し、37℃、5% CO2の条件下で一晩培養した後、TrypLE Express(Thermo Fisher Scienftific社)で処理し細胞懸濁液を調製した。導入293α細胞懸濁液を遠心し、上清を除去した後、実施例1)-7で調製したrG019)又はラットIgGコントロール(R&D Systems)を終濃度20nMで加えて懸濁し、4℃で1時間静置した。5% FBS含有PBSで2回洗浄した後、5% FBS含有PBSで50倍に希釈したAnti-Rat IgG(whole molecule)-FITC antibody produced in rabbit(SIGMA)を加えて懸濁し、4℃で1時間静置した。5% FBS含有PBSで2回洗浄した後、フローサイトメーター(CantoII:BD Biosciences)で検出を行った。データ解析はFlowJo(TreeStar)で行った。その結果を図2-1及び図2-2に示す。図2-1及び図2-2のヒストグラムにおいて、横軸は抗体結合量を表すFITCの蛍光強度、縦軸は細胞数を示す。網掛けで示すヒストグラムは遺伝子を導入していない陰性コントロール293α細胞を用いた場合を示し、白抜き実線で示すヒストグラムは、全長hCDH6又は各ECドメイン欠失293細胞を用いた場合を示す。細胞表面の全長hCDH6又は各ECドメイン欠失体に抗体が結合した場合は、蛍光強度が増強する。ラットIgGコントロールはいずれの導入細胞にも結合しない。rG019は、全長hCDH6、EC1欠失体、EC2欠失体、EC4欠失体、及びEC5欠失体には結合するが、EC3欠失体には結合しない。この結果から、rG019はhCDH6のEC3をエピトープとして特異的に結合することが示された。
取得抗体の評価に用いるCDH6陽性ヒト腫瘍細胞株を選抜するため、公知データベースからCDH6発現情報を検索し、フローサイトメトリー法により細胞膜表面でのCDH6の発現を評価した。ヒト卵巣腫瘍細胞株NIH:OVCAR-3、PA-1、OV-90及びヒト腎細胞腫瘍細胞株786-O、Caki-1(全てATCCから入手)を37℃、5% CO2の条件下で培養した後、TrypLE Express(Thermo Fisher Scienftific社)で処理し、細胞懸濁液を調製した。細胞を遠心し、上清を除去した後、市販抗ヒトCDH6抗体(MABU2715,R&D Systems)又は陰性コントロールとしてマウスIgG1(BD Pharmingen)を終濃度50ug/mL加えて懸濁し、4℃で1時間静置した。5% FBS含有PBSで2回洗浄した後、5% FBS含有PBSで50倍に希釈したF(ab’)2 Fragment of FITC-conjugated Goat Anti-mouse immunoglobulins(Dako)を加えて懸濁し、4℃で1時間静置した。5% FBS含有PBSで2回洗浄した後、フローサイトメーター(CantoII:BD Biosciences)で検出を行った。データ解析はFlowJo(TreeStar)で行った。その結果を図3に示す。図3のヒストグラムにおいて、横軸は抗体結合量を表すFITCの蛍光強度、縦軸は細胞数を示す。網掛けで示すヒストグラムは陰性コントロールmIgG1で染色した場合を示し、白抜き実線で示すヒストグラムは抗ヒトCDH6抗体で染色した場合を示す。細胞表面のhCDH6に抗体が結合したことによって蛍光強度が増強したことを示す。mIgG1コントロールはいずれの細胞にも結合しない。この結果、NIH:OVCAR-3、PA-1、OV-90及び786-O,Caki-1細胞株は、内在的にCDH6を細胞表面上に発現することが示された。
3)-1 G019抗体産生ハイブリドーマからのtotal RNAの調製
rG019の可変領域を含むcDNAを増幅するためG019抗体産生ハイブリドーマよりTRIzol Reagent(Ambion社)を用いてtotal RNAを調製した。
重鎖可変領域を含むcDNAの増幅は、実施例3)-1で調製したtotal RNAの約1μgとSMARTer RACE cDNA Amplification Kit(Clontech社)を用いて実施した。rG019の重鎖遺伝子の可変領域のcDNAをPCRで増幅するためのプライマーとして、UPM (Universal Primer A Mix:SMARTer RACE cDNA Amplification Kitに付属)、及び公知のラット重鎖の定常領域の配列から設計したプライマーを用いた。
実施例3)-2と同様の方法で実施した。ただし、rG019の軽鎖遺伝子の可変領域のcDNAをPCRで増幅するためのプライマーとして、UPM (Universal Primer A Mix:SMARTer RACE cDNA Amplification Kitに付属)、及び公知のラット軽鎖の定常領域の配列から設計したプライマーを用いた。
4)-1 ヒトキメラ化抗CDH6抗体chG019の発現ベクターの構築
4)-1-1 キメラ及びヒト化軽鎖発現ベクターpCMA-LKの構築
プラスミドpcDNA3.3-TOPO/LacZ(Invitrogen社)を制限酵素XbaI及びPmeIで消化して得られる約5.4kbのフラグメントと、配列番号20に示すヒト軽鎖シグナル配列及びヒトκ鎖定常領域をコードするDNA配列を含むDNA断片をIn-Fusion Advantage PCRクローニングキット(Clontech社)を用いて結合して、pcDNA3.3/LKを作製した。
pCMA-LKをXbaI及びPmeIで消化して軽鎖シグナル配列及びヒトκ鎖定常領域を取り除いたDNA断片と、配列番号21で示されるヒト重鎖シグナル配列及びヒトIgG1定常領域をコードするDNA配列を含むDNA断片をIn-Fusion Advantage PCRクローニングキット(Clontech社)を用いて結合して、pCMA-G1を構築した。
配列番号27に示すchG019重鎖のヌクレオチド配列のヌクレオチド番号36乃至440に示されるDNA断片を合成した(GENEART社)。In-Fusion HD PCRクローニングキット(Clontech社)を用いて、pCMA-G1を制限酵素BlpIで切断した箇所に合成したDNA断片を挿入することによりchG019重鎖発現ベクターを構築した。なお、chG019重鎖は予期せぬジスルフィド結合を防ぐため、CDR中のシステインをプロリンに置換した配列を用いた。
配列番号22に示すchG019軽鎖をコードするDNA配列を含むDNA断片を合成した(GENEART社)。In-Fusion HD PCRクローニングキット(Clontech社)を用いて、合成したDNA断片とpCMA-LKをXbaI及びPmeIで消化して軽鎖シグナル配列及びヒトκ鎖定常領域を取り除いたDNA断片を結合することにより、chG019軽鎖発現ベクターを構築した。
4)-2-1 chG019の生産
FreeStyle 293F細胞(Invitrogen社)はマニュアルに従い、継代、培養をおこなった。対数増殖期の1.2×109個のFreeStyle 293F細胞(Invitrogen社)を3L Fernbach Erlenmeyer Flask(CORNING社)に播種し、FreeStyle293 expression medium(Invitrogen社)で希釈して2.0×106細胞/mlに調製した。40mlのOpti-Pro SFM培地(Invitrogen社)に0.24mgの重鎖発現ベクターと0.36mgの軽鎖発現ベクターと1.8mgのPolyethyleneimine(Polyscience #24765)を加えて穏やかに攪拌し、さらに5分間放置した後にFreeStyle 293F細胞に添加した。37℃、8%CO2インキュベーターで4時間、90rpmで振とう培養後に600mlのEX-CELL VPRO培地(SAFC Biosciences社)、18mlのGlutaMAX I(GIBCO社)、及び30mlのYeastolate Ultrafiltrate(GIBCO社)を添加し、37℃、8%CO2インキュベーターで7日間、90rpmで振とう培養して得られた培養上清をDisposable Capsule Filter (Advantec #CCS-045-E1H)でろ過した。
実施例4)-2-1で得られた培養上清をrProtein Aアフィニティークロマトグラフィーの1段階工程で精製した。培養上清をPBSで平衡化したMabSelectSuReが充填されたカラム(GE Healthcare Bioscience社製)にアプライしたのちに、カラム容量の2倍以上のPBSでカラムを洗浄した。次に2Mアルギニン塩酸塩溶液(pH4.0)で溶出し、抗体の含まれる画分を集めた。その画分を透析(Thermo Scientific社、Slide-A-Lyzer Dialysis Cassette)によりHBSor(25mM ヒスチジン/5% ソルビトール、pH6.0)へのバッファー置換を行った。Centrifugal UF Filter Device VIVASPIN20(分画分子量UF10K,Sartorius社)で抗体を濃縮し、IgG濃度を5mg/ml以上に調製した。最後にMinisart-Plus filter(Sartorius社)でろ過し、精製サンプルとした。
4)-2で精製したヒトキメラ化抗CDH6抗体chG019のCDH6結合性をフローサイトメトリー法により確認した。実施例1)-1で作製したpcDNA3.1-hCDH6、又はpcDNA3.1-cynoCDH6、又はpcDNA3.1をそれぞれ293α細胞にLipofectamine 2000を用いて一過性に導入し、37℃、5% CO2の条件下で一晩培養した後、TrypLE Express(Thermo Fisher Scienftific社)で処理し細胞懸濁液を調製した。これらの細胞懸濁液にchG019を加えて4℃で1時間静置した後、5% FBS含有PBSで2回洗浄し、5% FBS含有PBSで500倍に希釈したPE標識F(ab’)2 Fragment抗ヒトIgG,Fcγ抗体(JACKSON IMMUNORESEARCH)を加えて懸濁し、4℃で1時間静置した。5% FBS含有PBSで2回洗浄した後、5% FBS含有PBSに再懸濁し、フローサイトメーター(CantoII:BD Biosciences)で検出を行った。データ解析はFlowJo(TreeStar)で行った。図4に示すとおり、chG019は陰性コントロールであるpcDNA3.1導入293T細胞には結合せず、pcDNA3.1-hCDH6及びpcDNA3.1-cynoCDH6導入293T細胞に抗体濃度依存的に結合した。図4において横軸は抗体濃度を示し、縦軸は結合量をMeanFluorescent Intensity(平均蛍光強度)で示す。この結果から、chG019が、ヒトおよびカニクイザルCDH6に対して特異的に結合し、結合活性はほぼ同等であることがわかる。
5)-1 抗CDH6抗体のヒト化体デザイン
5)-1-1 chG019の可変領域の分子モデリング
chG019の可変領域の分子モデリングは、ホモロジーモデリングとして公知の方法(Methods in Enzymology,203,121-153,(1991))を利用した。chG019の重鎖と軽鎖の可変領域に対して高い配列同一性を有するProtein Data Bank(Nuc.Acid Res.35,D301-D303(2007))に登録されている構造(PDB ID:2I9L)を鋳型に、市販のタンパク質立体構造解析プログラムBioLuminate(Schrodinger社製)を用いて行った。
chG019は、CDRグラフティング(Proc.Natl.Acad.Sci.USA 86,10029-10033(1989))によりヒト化した。KABAT et al.(Sequences of Proteins of Immunological Interest,5th Ed.Public Health Service National Institutes of Health,Bethesda,MD.(1991))において既定されるヒトのgamma鎖サブグループ1およびkappa鎖サブグループ1のコンセンサス配列が、chG019のフレームワーク領域に対して高い同一性を有することから、それぞれ、重鎖と軽鎖のアクセプターとして選択された。アクセプター上に移入すべきドナー残基は、Queen et al.(Proc.Natl.Acad.Sci.USA 86,10029-10033(1989))によって与えられる基準などを参考に三次元モデルを分析することで選択された。
設計された3種の重鎖をhH01、hH02及びhH04と命名した。hH01の重鎖全長アミノ酸配列を、配列番号39に記載する。配列番号39のアミノ酸配列をコードするヌクレオチド配列を、配列番号40に記載する。hH02の重鎖全長アミノ酸配列を、配列番号43に記載する。配列番号43のアミノ酸配列をコードするヌクレオチド配列を、配列番号44に記載する。hH04の重鎖全長アミノ酸配列を、配列番号47に記載する。配列番号47のアミノ酸配列をコードするヌクレオチド配列を、配列番号48に記載する。
設計された2種の軽鎖をhL02およびhL03と命名した。hL02の軽鎖全長アミノ酸配列を、配列番号31に記載する。配列番号31のアミノ酸配列をコードするヌクレオチド配列を、配列番号32に記載する。hL03の軽鎖全長アミノ酸配列を、配列番号35に記載する。配列番号35のアミノ酸配列をコードするヌクレオチド配列は、配列番号36に記載する。
hH01及びhL02からなる抗体を「H01L02抗体」又は「H01L02」と称する。hH02及びhL02からなる抗体を「H02L02抗体」又は「H02L02」と称する。hH02及びhL03からなる抗体を「H02L03抗体」又は「H02L03」と称する。hH04及びhL02からなる抗体を「H04L02抗体」又は「H04L02」と称する。
5)-5-1 ヒト化hG019の重鎖発現ベクターの構築
5)-5-1-1 hH01重鎖発現ベクターの構築
配列番号40に示すhH01重鎖のヌクレオチド配列のヌクレオチド番号36乃至440に示されるDNA断片を合成した(GENEART社)。実施例4)-1-3と同様の方法でhH01重鎖発現ベクターを構築した。
配列番号44に示すhH02重鎖のヌクレオチド配列のヌクレオチド番号36乃至440に示されるDNA断片を合成した(GENEART社)。実施例4)-1-3と同様の方法でhH02重鎖発現ベクターを構築した。
配列番号48に示すhH04重鎖のヌクレオチド配列のヌクレオチド番号36乃至440に示されるDNA断片を合成した(GENEART社)。実施例4)-1-3と同様の方法でhH04重鎖発現ベクターを構築した。
5)-5-2-1 hL02軽鎖発現ベクターの構築
配列番号32に示すhL02軽鎖のヌクレオチド配列のヌクレオチド番号37乃至399に示されるhL02軽鎖の可変領域をコードするDNA配列を含むDNA断片を合成した(GENEART社)。In-Fusion HD PCRクローニングキット(Clontech社)を用いて、pCMA-LKを制限酵素BsiWIで切断した箇所に合成したDNA断片を挿入することによりhL02軽鎖発現ベクターを構築した。
配列番号36に示すhL03軽鎖のヌクレオチド配列のヌクレオチド番号37乃至399に示されるhL03軽鎖の可変領域をコードするDNA配列を含むDNA断片を合成した(GENEART社)。実施例5)-5-2-1と同様の方法でhL03軽鎖発現ベクターを構築した。
5)-5-3-1 H01L02、H02L02、H02L03、H04L02の生産
実施例4)-2-1と同様の方法で生産した。実施例5)-4に示した重鎖と軽鎖の組み合わせにより、H01L02、H02L02、H02L03、H04L02を生産した。
実施例5)-5-3-1で得られた培養上清をrProtein Aアフィニティークロマトグラフィーとセラミックハイドロキシアパタイトの2段階工程で精製した。培養上清をPBSで平衡化したMabSelectSuReが充填されたカラム(GE Healthcare Bioscience社製)にアプライした後に、カラム容量の2倍以上のPBSでカラムを洗浄した。次に2Mアルギニン塩酸塩溶液(pH4.0)で抗体を溶出した。抗体の含まれる画分を透析(Thermo Scientific社、Slide-A-Lyzer Dialysis Cassette)によりPBSへのバッファー置換を行い、5mMリン酸ナトリウム/50mM MES/pH7.0のバッファーで5倍希釈した後に、5mM NaPi/50mM MES/30mM NaCl/pH7.0のバッファーで平衡化したセラミックハイドロキシアパタイトカラム(日本バイオラッド、Bio-Scale CHT Type―1 Hydroxyapatite Column)にアプライした。塩化ナトリウムによる直線的濃度勾配溶出を実施し、抗体の含まれる画分を集めた。その画分を透析(Thermo Scientific社、Slide-A-Lyzer Dialysis Cassette)によりHBSor(25mM ヒスチジン/5% ソルビトール、pH6.0)へのバッファー置換を行った。Centrifugal UF Filter Device VIVASPIN20(分画分子量UF10K,Sartorius社)にて抗体を濃縮し、IgG濃度を20mg/mlに調製した。最後にMinisart-Plus filter(Sartorius社)でろ過し、精製サンプルとした。
実施例で用いた抗CDH6抗体NOV0712は、国際公開第2016/024195号に記載のNOV0712の軽鎖全長、及び重鎖全長のアミノ酸配列(それぞれ、国際公開第2016/024195の配列番号235及び配列番号234)を参照して作製した。
参考例1)-1-1 抗CDH6抗体NOV0712の重鎖発現ベクターの構築
配列番号54に示すNOV0712の重鎖のヌクレオチド配列のヌクレオチド番号36乃至428に示されるNOV0712の重鎖の可変領域を含むDNA断片を合成した(GENEART社)。実施例4)-1-3と同様の方法でNOV0712の重鎖発現ベクターを構築した。当該NOV0712の重鎖発現ベクターにより発現するNOV0712の重鎖のアミノ酸配列を、配列番号53に示す。配列番号53に示されるアミノ酸配列中、1~19番目のアミノ酸残基からなるアミノ酸配列はシグナル配列である。
配列番号52に示すNOV0712の軽鎖のヌクレオチド配列のヌクレオチド番号37乃至405に示されるNOV0712の軽鎖の可変領域をコードするDNA配列を含むDNA断片を合成した(GENEART社)。実施例5)-5-2-1と同様の方法でNOV0712の軽鎖発現ベクターを構築した。当該NOV0712の軽鎖発現ベクターにより発現するNOV0712の軽鎖のアミノ酸配列を、配列番号51に示す。配列番号51に示されるアミノ酸配列中、1~20番目のアミノ酸残基からなるアミノ酸配列はシグナル配列である。
参考例1)-2-1 抗CDH6抗体NOV0712の生産
実施例4)-2-1と同様の方法でNOV0712を生産した。
参考例1)-2-1で得られた培養上清から実施例4)-2-2と同様の方法で抗CDH6抗体NOV0712を精製した(抗体濃度HBSorで5mg/l)。
6)-1 ヒト化hG019の結合性評価
抗体と抗原(Recombinant Human CDH6 Fc His chimera, R&D Systems)との解離定数測定は、Biacore T200(GEヘルスケアバイオサイエンス)を使用し、固定化した抗His抗体に抗原をリガンドとして捕捉(キャプチャー)し、抗体をアナライトとして測定するキャプチャー法にて行った。抗ヒスチジン抗体(His capture kit、GEヘルスケアバイオサイエンス)は、センサーチップCM5(GEヘルスケアバイオサイエンス)へ、アミンカップリング法にて約1000RU共有結合させた。リファレンスセルにも同様に固定化した。ランニングバッファーとして1mM CaCl2を添加したHBS-P+(10mM HEPES pH7.4、0.15M NaCl、0.05% Surfactant P20)を用いた。抗ヒスチジン抗体を固定化したチップ上に、抗原を60秒間添加した後、抗体の希釈系列溶液(0.391-100nM)を流速30μl/分で300秒間添加し、引き続き600秒間の解離相をモニターした。再生溶液として、5M MgCl2を添加したGlycine溶液pH1.5を流速10μl/分で30秒間、2回添加した。データの解析は、分析ソフトウェア(BIAevaluation software, version 4.1)のSteady State Affinityモデルを用いて、解離定数(KD)を算出した。結果を表2に示す。
6)-2-1 ドメイン欠失体を用いたエピトープ解析
実施例2)-2-1で作成した各ドメイン欠失体発現ベクター、及び全長hCDH6を発現するpcDNA3.1-hCDH6をLipofectamine 2000(Thermo Fisher Scientific)を用いて一過性に導入し、37℃、5% CO2の条件下で一晩培養した後、細胞懸濁液を調製した。遺伝子導入した293α細胞懸濁液を遠心し、上清を除去した後、実施例5)-5-3で調製したヒト化hG019抗体4種(クローン番号は、H01L02、H02L02、H02L03およびH04L02)、又は、参考例1で調製した抗CDH6抗体NOV0712、又は、陰性コントロールとしてヒトIgG1(Calbiochem)を加えて懸濁し、4℃で1時間静置した。5% FBS含有PBSで2回洗浄した後、5% FBS含有PBSで500倍に希釈したAPC-anti-human IgG goat F(ab’)2(Jackson laboratory)を加えて懸濁し、4℃で1時間静置した。5% FBS含有PBSで2回洗浄した後、フローサイトメーター(CantoII:BD Biosciences)で検出を行った。データ解析はFlowJo(TreeStar)で行った。その結果を図5-1~図5-6に示す。図5-1~図5-6のヒストグラムにおいて、横軸は抗体結合量を表すAPCの蛍光強度、縦軸は細胞数を示す。網掛けで示すヒストグラムは遺伝子を導入していない陰性コントロール293α細胞を用いた場合を示し、白抜き実線で示すヒストグラムは、全長hCDH6又は各ECドメイン欠失293α細胞を用いた場合を示す。細胞表面の全長hCDH6又は各ECドメイン欠失体に抗体が結合した場合は、蛍光強度が増強する。ヒトIgG1コントロールはいずれの導入細胞にも結合しない。ヒト化hG019抗体4種(クローン番号は、H01L02、H02L02、H02L03およびH04L02)は、全長hCDH6、EC1欠失体、EC2欠失体、EC4欠失体、及びEC5欠失体には結合するが、EC3欠失体には結合しない。すなわち、ヒト化hG019抗体4種はhCDH6のEC3をエピトープとして特異的に結合することが示された。一方、抗CDH6抗体NOV0712は、全長hCDH6、EC1欠失体、EC2欠失体、EC3欠失体、及びEC4欠失体には結合するが、EC5欠失体には結合しない。すなわち、抗CDH6抗体NOV0712抗体はhCDH6のEC5をエピトープとして特異的に結合することが示され、国際公開第2016/024195号に記載されているNOV0712のエピトープ情報と一致する。この結果から、NOV0712と本明細書で取得したヒト化hG019抗体4種は、異なる性質を示す抗CDH6抗体であることが示された。
6)-2-2-1 786-O/hCDH6安定発現細胞株の作製
786-O/hCDH6安定発現細胞株は、786-O細胞(ATCC)にヒトCDH6全長発現用組換えレトロウイルスを感染させることにより作製した。ヒトCDH6発現レトロウイルスベクター(pQCXIN-hCDH6)は、ヒトCDH6タンパク質(NP_004923)をコードするcDNA発現ベクター(OriGene社RC217889)を用いて、当業者に公知な方法に従いレトロウイルスベクターpQCXIN(CLONTECH)に組み込むことにより作製された。FuGene HD(Promega)を用いてレトロウイルスパッケージング細胞RetroPack PT67(CLONTECH)にpQCXIN-hCDH6を一過性に導入し、48時間後に組換えレトロウイルスを含む培養上清を回収し、786-O細胞培養系に添加することで同細胞に感染させた。感染3日後から、G418(Gibco)を終濃度50mg/mLで添加した培地で37℃、5% CO2の条件下で培養を行い感染細胞の薬剤選抜を行うことで、ヒトCDH6を安定的に発現する細胞株786-O/hCDH6を樹立した。実施例2)-3-1と同様にフローサイトメトリーにて安定発現株でのヒトCDH6の高発現を確認した(図6)。検出用抗体には5% FBS含有PBSで500倍に希釈したGoat anti-Mouse IgG1 Secondary Antibody Alexa Fluor 647(Thermo Fisher Scientific)を使用した。その結果を図6に示す。図8のヒストグラムにおいて、横軸は抗体結合量を表すAlexa Fluor 647の蛍光強度、縦軸は細胞数を示す。網掛けで示すヒストグラムは陰性コントロールmIgG1で染色した場合を示し、白抜き実線で示すヒストグラムは抗ヒトCDH6抗体で染色した場合を示す。細胞表面のhCDH6に抗体が結合したことによって蛍光強度が増強したことを示す。mIgG1コントロールはいずれの細胞にも結合しない。この結果、786-O/hCDH6安定発現細胞株では親株786-O細胞と比較して、ヒトCDH6を高発現することが示された。
Alexa Fluor 488 Monoclonal Antibody Labeling Kit(Thermo Fisher)を用いて、ラベル化H01L02及びラベル化NOV0712を作製した。6)-2-2-1で作製した786-O/hCDH6安定発現細胞株の細胞懸濁液を遠心し、上清を除去した後、ラベル化NOV0712又はラベル化H01L02を終濃度5nMで添加し、さらに実施例5)-5-3で調製したヒト化hG019抗体4種(クローン番号は、H01L02、H02L02、H02L03およびH04L02)、又は、参考例1で調製した抗CDH6抗体NOV0712、又は、陰性コントロールとしてヒトIgG1(Calbiochem)を図7の横軸で示す終濃度で添加して懸濁し、4℃で1時間静置した。5% FBS含有PBSで2回洗浄した後、フローサイトメーター(CantoII:BD Biosciences)で検出を行った。データ解析はFlowJo(TreeStar)で行った。その結果を図7に示す。横軸はラベル化していない抗体の添加時の終濃度を示し、縦軸は結合量をMeanFluorescent Intensity(平均蛍光強度)で示す。ラベル化NOV0712を添加した細胞にラベル化していないNOV0712を添加した場合は、同じエピトープを持ち結合が競合するため、添加濃度依存的にラベル化していない抗体に置き換わりラベル化抗体の結合量が減少する。一方、ラベル化NOV0712を添加した細胞にヒト化hG019抗体4種、又は陰性コントロールとしてヒトIgG1を添加しても、ラベル化抗体の結合量に変化は無いことから、これらの抗体はエピトープが異なり結合が競合しないことが示される。同様に、ラベル化H01L02を添加した細胞にラベル化していないヒト化hG019抗体4種を添加した場合は、同じエピトープを持ち結合が競合するため、添加濃度依存的にラベル化していない抗体に置き換わりラベル化抗体の結合量が減少する。一方、ラベル化H01L02を添加した細胞にNOV0712、又は陰性コントロールとしてヒトIgG1を添加しても、ラベル化抗体の結合量に変化は無いことから、これらの抗体はエピトープが異なり結合が競合しないことが示される。
ヒト化hG019およびNOV0712の内在化活性は、タンパク質合成を阻害する毒素(サポリン)を結合させた抗ヒトIgG試薬Hum-ZAP(ADVANCED TARGETING SYSTEMS)を用いて評価した。すなわち、ヒトCDH6陽性卵巣腫瘍細胞株NIH:OVCAR-3(ATCC)を4x103 cells/wellで96wellプレートに播種して37℃、5% CO2の条件下で一晩培養した。ヒトCDH6陽性腎細胞腫瘍細胞株786-O(ATCC)は1x103 cells/wellで96wellプレートに播種して一晩培養した。ヒトCDH6陽性卵巣腫瘍細胞株PA-1(ATCC)を1x103 cells/wellで96wellプレートに播種して37℃、5% CO2の条件下で一晩培養した。翌日、抗CDH6抗体(終濃度:1nM)、又は、陰性コントロール抗体としてヒトIgG1抗体(Calbiochem)を添加した。さらにHum-ZAP(終濃度:0.5nM)または、陰性コントロールとして毒素を結合していないF(ab’)2 Fragment Goat Anti-human IgG,Fc(gamma) Fragment Specific(JACKSON IMMUNORESEARCH)(終濃度:0.5nM)を添加し、3日間37℃、5%CO2条件下で培養した。生存細胞数は、CellTiter-GloTM Luminescent Cell Viability AssayによるATP活性(RLU)の定量で測定した。この評価では、ヒト化抗CDH6抗体の内在化活性に依存してHum-ZAPが細胞内に取り込まれ、タンパク合成を阻害するサポリンが細胞内に放出されることで、細胞増殖が抑制される。抗CDH6抗体添加による細胞増殖抑制作用は、Hum-ZAPの代わりに陰性コントロールを添加したウェルの生存細胞数を100%とした相対生存率で表記した。図8に細胞生存率の表を示す。本実験において内在化活性が強い抗体は低い細胞生存率を示すと考えられる。この結果、ヒト化hG019抗体4種は3種の細胞株いずれにおいても細胞生存率から予測される内在化率は約50~75%であり、非常に高い内在化活性を示し、NOV0712と比較して、さらに高い内在活性を示す。ADCの薬効メカニズムから、高い内在化活性を有する抗体は、ADC化抗体をして、より適していると考えられる。
7)-1 ヒト化hG019の改変体の設計
7)-1-1 H01L02の可変領域改変体の設計
実施例5)-2に記載のhH01アミノ酸配列において71番目のチロシンをアラニンへ置換した重鎖をhH11と命名し、81番目のグルタミンをセリンに置換し、123番目のフェニルアラニンをアラニンに置換した重鎖をhH31と命名した。hH11の重鎖可変領域アミノ酸配列を、配列番号55に記載する。配列番号55のアミノ酸配列をコードするヌクレオチド配列を、配列番号56に記載する。hH31の重鎖可変領域アミノ酸配列を、配列番号60に記載する。配列番号60のアミノ酸配列をコードするヌクレオチド配列を、配列番号61に記載する。
実施例5)-2に記載のhH01のアミノ酸配列において、EU indexにより特定される234位、235位のロイシンをアラニンへ置換した重鎖を設計した(本明細書中、「hH01A」と称する)。また、実施例7)-1-1で設計したhH11の可変領域を有し、IgG1のアイソタイプであり、かつ、EU indexにより特定される234位、235位のロイシンをアラニンへ置換した重鎖を設計した(本明細書中、「hH11A」と称する)。 実施例7)-1-1で設計したhH31の可変領域を有し、IgG1のアイソタイプであり、かつ、EU indexにより特定される234位、235位のロイシンをアラニンへ置換した重鎖を設計した(本明細書中、「hH31A」と称する)。
hH01A及びhL02からなる抗体を「H01L02A抗体」又は「H01L02A」と称する。hH11A及びhL02からなる抗体を「H11L02A抗体」又は「H11L02A」と称する。hH31A及びhL02からなる抗体を「H31L02A抗体」又は「H31L02A」と称する。
7)-3-1 ヒト化IgG1LALAタイプ重鎖発現ベクターpCMA-G1LALAの構築
配列番号71で示されるヒト重鎖シグナル配列及びヒトIgG1LALA定常領域のアミノ酸をコードするDNA配列を含むDNA断片をもちいて、実施例4)-1-2と同様の方法でpCMA-G1LALAを構築した。
配列番号66に示すhH01Aのヌクレオチド配列のヌクレオチド番号36乃至440に示されるDNA断片を合成した(GENEART社)。In-Fusion HD PCRクローニングキット(Clontech社)を用いて、pCMA-G1LALAを制限酵素BlpIで切断した箇所に合成したDNA断片を挿入することによりhH01A発現ベクターを構築した。
配列番号68に示すhH11Aのヌクレオチド配列のヌクレオチド番号36乃至440に示されるDNA断片を合成した(GENEART社)。実施例7)-3-2と同様の方法でhH11A発現ベクターを構築した。
配列番号70に示すhH31Aのヌクレオチド配列のヌクレオチド番号36乃至440に示されるDNA断片を合成した(GENEART社)。実施例7)-3-2と同様の方法でhH31A発現ベクターを構築した。
7)-4-1 H01L02A、H11L02A、H31L02Aの生産
実施例4)-2-1と同様の方法で生産した。実施例5)-5-2-1で構築した軽鎖発現ベクターと実施例7)-3で構築した重鎖発現ベクターを用いて、実施例7)-2に示したH鎖とL鎖の組み合わせに対応したH鎖発現ベクターとL鎖発現ベクターの組み合わせで、H01L02A、H11L02A、H31L02Aを取得した。
実施例7)-4-1で得られた培養上清を用いて、実施例5)-5-3-2と同様の方法で精製した。
8)-1 H01L02A、H11L02A、H31L02Aの結合性評価
実施例7)-4で作製したH01L02A、H11L02A、H31L02AとヒトCDH6との解離定数測定は、Biacore T200(GE Healthcare Bioscience社製)を使用し、His Capture Kit(GE Healthcare Bioscience社製)を用いて固定化したAnti-histidine antibodyに抗原をリガンドとして捕捉(キャプチャー)し、抗体をアナライトとして測定するキャプチャー法にて行った。センサーチップとしてCM5(GE Healthcare Bioscience社製)、ランニングバッファーとして20mM Tris-HCl、150mM NaCl、1mM CaCl2、0.05% SurfactantP20、pH7.4を用いた。チップ上に1μg/mLのRecombinant Human Cadherin―6 (KCAD)/Fc Chimera(RD-SYSTEMS)を10μL/分で60秒間添加した後、実施例7)-4で調製した抗体の希釈系列溶液0.11~81μg/mL)を流速30μL/分で180秒間添加し、引き続き180秒間の解離相をモニターした。再生溶液として、Glycine 1.5(GE Healthcare Bioscience社製)を流速20μL/分で30秒間添加した。データの解析にはSteady State Affinityモデルを用いて、解離定数(KD)を算出した。結果を表3に示す。
抗LPS抗体はWO2015/046505を参照して作製した。本実施例で使用した抗LPS抗体は、アイソタイプがIgG1である(本明細書中、抗LPS抗体ともいう)。本実施例で使用した抗LPS抗体の軽鎖及び重鎖のアミノ酸配列を配列番号72及び配列番号73に示す。
[実施例10-1:中間体1]
5-ベンジル 6-メチル(6S)-5-アザスピロ[2.4]ヘプタン-5,6-ジカルボキシレ-ト(1-1)(104mmol,WO2012087596)のテトラヒドロフラン(500mL)溶液に、水素化ホウ素リチウム(4.30g,178mmol)を0℃にて少量ずつ加えた。0℃にて30分撹拌した後、室温にて2時間撹拌した。0℃にて水(180mL)、2規定塩酸(186mL)を加え、減圧留去した。得られた残渣を酢酸エチルで4回抽出し、有機層を飽和食塩水で洗浄した後、無水硫酸ナトリウムで乾燥した。減圧留去し、得られた残渣(1-2)(27.9g,90%)をそのまま次の反応に用いた。
上記工程1にて得られた化合物(1-2)(27.9g,107mmol)とイミダゾ-ル(14.5g,214mmol)のジクロロメタン(300mL)溶液に、室温にてtert-ブチルジメチルシリルクロリド(24.2g,160mmol)を加え、室温にて18時間撹拌した。反応溶液を飽和クエン酸水溶液、飽和炭酸水素ナトリウム水溶液、飽和食塩水で洗浄し、無水硫酸ナトリウムで乾燥した後、減圧留去した。得られた残渣をシリカゲルカラムクロマトグラフィ-[ヘキサン:酢酸エチル=100:0(v/v)~50:50(v/v)]にて精製し、目的物(1-3)(32.5g,81%)を得た。
1H-NMR(CDCl3)δ:7.39-7.34(5H,m),5.23-5.11(2H,m),4.10-3.48(4H,m),3.16-3.14(1H,m),2.15-2.04(1H,m),1.81-1.77(1H,m),0.91-0.88(9H,m),0.65-0.55(4H,m),0.08-0.01(6H,m).
MS(APCI)m/z:376(M+H)+
上記工程2で得られた化合物(1-3)(32.5g,86.5mmol)のエタノ-ル(400mL)溶液に、室温にて7.5%パラジウム炭素触媒(54%水分、5.00g)を加え、室温、水素雰囲気下にて6時間撹拌した。反応溶液をセライト濾過し、濾液を減圧留去し、目的物(1-4)(21.3g,定量的)を得た。
1H-NMR(CDCl3)δ:3.79-3.77(1H,m),3.71-3.69(1H,m),3.65-3.60(1H,m),3.01-2.98(2H,m),1.81-1.71(2H,m),0.90(9H,s),0.65-0.57(4H,m),0.08(3H,s),0.07(3H,s).
MS(APCI、ESI)m/z:242(M+H)+
5-メトキシ-2-ニトロ-4-{トリ(プロパン-2-イル)シリル]オキシ}安息香酸(52.2g,141mmol,US20150283262)と1-ヒドロキシベンゾトリアゾ-ル一水和物(23.8g,155mmol)のジクロロメタン(500mL)溶液に、氷冷下にてN,N’-ジシクロヘキシルカルボジイミド(35.0g,170mmol)を加えた。反応混合物を室温にて撹拌した。カルボン酸消失後、-60℃にて上記工程3にて得られた化合物(1-4)(34.1g,141mmol)とトリエチルアミン(29.4mL,212mmol)のジクロロメタン(100mL)溶液をゆっくりと滴下した。反応溶液を室温にて一晩撹拌した後、反応混合物に飽和炭酸水素ナトリウム水溶液を加え、反応混合物をクロロホルムで抽出した。有機層を水および飽和食塩水で洗浄し、無水硫酸マグネシウムで乾燥した。減圧留去して得られた残渣に酢酸エチルとジエチルエ-テルを加え、固体成分を濾過により取り除き、濾液を減圧留去し、得られた残渣をシリカゲルカラムクロマトグラフィー[ヘキサン:酢酸エチル=100:0(v/v)~25:75(v/v)]にて精製し、目的物(1-5)(55.0g,66%)を得た。
1H-NMR(CDCl3)δ:7.72-7.66(1H,m),6.80-6.73(1H,m),4.53-4.49(1H,m),4.04-3.95(1H,m),3.91-3.88(3H,m),3.59-3.54(1H,m),3.36-3.25(0.5H,m),3.01-2.96(1.5H,m),2.24-2.20(0.3H,m),2.09-2.05(0.7H,m),2.00-1.97(0.7H,m),1.69-1.67(0.3H,m),1.32-1.24(3H,m),1.12-1.05(18H,m),0.93-0.91(6H,m),0.79-0.77(3H,m),0.71-0.62(2H,m),0.57-0.40(2H,m),0.12-0.10(4H,m),0.11-0.15(2H,m).
MS(APCI、ESI)m/z:593(M+H)+
上記工程4で得られた化合物(1-5)(55.0g,92.8mmol)のエタノ-ル(300mL)溶液に、窒素雰囲気下にて、7.5%パラジウム炭素(10.0g)を加えた。窒素風船を直ちに水素風船に付け替え、反応混合物を水素雰囲気下、室温で激しく撹拌した。原料消失後、反応混合物を濾過し、濾液を減圧留去し、得られた目的物(1-6)(52.2g,100%)をそのまま次の反応に用いた。
1H-NMR(CDCl3)δ:6.71(1H,s),6.25(1H,s),4.55-4.28(2H,m),3.97(1H,m),3.75-3.62(3H,m),3.70(3H,s),3.09-3.07(1H,m),2.24-2.19(1H,m),1.81-1.68(1H,m),1.27-1.22(3H,m),1.09-1.05(18H,m),0.90(9H,s),0.65-0.46(4H,m),0.07-0.03(6H,m).
MS(APCI、ESI)m/z:563(M+H)+
上記工程5で得られた化合物(1-6)(18.6g,33.0mmol)およびトリエチルアミン(6.26mL,45.2mmol)のTHF(300mL)溶液に、エタノ-ル-氷浴上にて、トリホスゲン(4.22g,14.2mmol)をゆっくりと添加した。添加後、氷冷した反応混合物に、N-[(プロプ-2-エン-1-イルオキシ)カルボニル]-L-バリル-N-[4-(ヒドロキシメチル)フェニル]-L-アラニンアミド(11.4g,30.2mmol,WO2011130598)とトリエチルアミン(6.26mL,45.2mmol)のテトラヒドロフラン(100mL)、N,N-ジメチルホルムアミド(30mL)混合溶液をゆっくりと滴下した。滴下後、氷浴をはずし、反応混合物を、窒素雰囲気下、40℃にて撹拌した。原料消失後、反応混合物に水を加え、反応混合物を酢酸エチルで抽出した。有機層を飽和食塩水で洗浄し、無水硫酸ナトリウムで乾燥した。濾過後、減圧留去して得られた残渣を、シリカゲルカラムクロマトグラフィ-[ヘキサン:酢酸エチル=100:0(v/v)~40:60(v/v)]にて精製し、目的物(1-7)(23.5g,74%)を得た。
1H-NMR(CDCl3)δ:8.99(1H,m),8.58(1H,s),7.80(1H,s),7.55-7.53(2H,m),7.34-7.32(2H,m),6.77-6.75(2H,m),5.94-5.87(1H,m),5.40-5.38(1H,m),5.33-5.29(1H,m),5.23-5.21(1H,m),5.13(1H,m),5.10(2H,m),4.69-4.64(1H,m),4.62-4.52(2H,m),4.06-4.03(1H,m),3.98(1H,m),3.76-3.65(6H,m),3.04(1H,m),2.28-2.26(1H,m),2.18-2.13(1H,m),1.46(3H,m),1.32-1.25(3H,m),1.11-1.09(18H,m),0.99-0.84(15H,m),0.65-0.40(4H,m),0.08-0.00(6H,m).
MS(APCI、ESI)m/z:966(M+H)+
上記工程6で得られた化合物(1-7)(23.5g,24.3mmol)のテトラヒドロフラン(50mL),メタノ-ル(50mL),水(44mL)溶液に、室温下にて酢酸(200mL)を加えた。反応混合物を室温にて撹拌した。原料消失後、反応混合物を酢酸エチルで抽出した。有機層を水および飽和食塩水で洗浄し、無水硫酸ナトリウムで乾燥した。濾過後、減圧留去して得られた残渣を、シリカゲルカラムクロマトグラフィ-[ヘキサン:酢酸エチル=100:0(v/v)~0:100(v/v)]にて精製し、目的物(1-8)(18.0g,87%)を得た。
1H-NMR(CDCl3)δ:8.64-8.62(1H,m),8.50(1H,m),7.69(1H,m),7.55-7.53(2H,m),7.34-7.32(2H,m),6.79-6.75(3H,m),5.91-5.89(1H,m),5.39(1H,m),5.32-5.29(1H,m),5.23-5.21(1H,m),4.68-4.54(4H,m),4.31(1H,m),4.06-4.04(1H,m),3.81-3.79(3H,m),3.76(3H,s),3.63-3.61(1H,m),3.13-3.11(1H,m),2.16-2.13(1H,m),1.87-1.81(2H,m),1.46-1.43(3H,m),1.30-1.24(3H,m),1.12-1.08(18H,m),0.98-0.91(6H,m),0.63-0.45(4H,m).
MS(APCI、ESI)m/z:852(M+H)+
ジメチルスルホキシド(3.75mL,52.8mmol)のジクロロメタン(300mL)溶液に、窒素雰囲気下、-78℃にて、塩化オキサリル(2.17mL,25.3mmol)をゆっくりと滴下した。滴下後、反応混合物を-78℃にて撹拌した。反応混合物に、上記工程7で得られた化合物(1-8)(18.0g,21.1mmol)のジクロロメタン(50.0mL)溶液をゆっくりと滴下した。反応溶液に-78℃にて、トリエチルアミン(14.6mL,105mmol)を加えた。添加後、冷媒浴をはずし、室温までゆっくりと昇温した。原料消失後、反応混合物に水を加え、反応混合物をクロロホルム(200mL)で抽出した。有機層を水および飽和食塩水で洗浄し、無水硫酸マグネシウムで乾燥した。濾過後、減圧留去して得られた残渣を、シリカゲルカラムクロマトグラフィ-[ヘキサン:酢酸エチル=100:0(v/v)~0:60(v/v)]にて精製し、目的物(1-9)(16.5g,92%)を得た。
1H-NMR(CDCl3)δ:8.51-8.36(1H,m),7.54-7.38(2H,m),7.22-7.07(3H,m),6.73-6.64(1H,m),5.94-5.87(2H,m),5.33-5.22(3H,m),5.09(1H,m),4.97(1H,m),4.64-4.58(4H,m),4.02-4.00(1H,m),3.86-3.83(3H,m),3.75-3.70(1H,m),3.61-3.54(2H,m),3.38-3.29(1H,m),2.40(1H,m),2.16-2.14(1H,m),1.74-1.71(1H,m),1.44(3H,m),1.18-1.16(3H,m),1.05-1.00(18H,m),0.97-0.92(6H,m),0.72-0.60(4H,m).
MS(APCI、ESI)m/z:850(M+H)+
上記工程8で得られた化合物(1-9)(12.0g,14.1mmol)および2,6-ルチジン(6.58mL,56.5mmol)のジクロロメタン(200mL)溶液に、窒素雰囲気下、0℃にて、トリフルオロメチルスルホン酸tert-ブチルジメチルシリル(9.73mL,42.3mmol)をゆっくりと滴下した。氷冷下、10分間撹拌した後に、氷浴をはずし、室温にて撹拌した。原料消失後、反応混合物に水を加え、反応混合物をクロロホルムで抽出した水および飽和食塩水で洗浄し、無水硫酸ナトリウムで乾燥した。濾過後、減圧留去して得られた残渣をシリカゲルカラムクロマトグラフィ-[ヘキサン:酢酸エチル=100:0(v/v)~25:75(v/v)]にて精製し、目的物(1-10)(8.12g,60%)を得た。
1H-NMR(CDCl3)δ:8.67-8.45(1H,m),7.50-7.44(2H,m),7.19(1H,s),7.13(2H,m),6.95(2H,m),6.62-6.57(2H,m),6.01(1H,m),5.95-5.86(1H,m),5.33-5.13(3H,m),4.82(1H,m),4.65-4.54(3H,m),4.03-4.01(1H,m),3.84-3.82(3H,m),3.73-3.66(1H,m),3.50-3.48(1H,m),3.27(1H,m),2.37-2.33(1H,m),2.19-2.13(1H,m),1.54-1.43(3H,m),1.22-1.13(3H,m),1.10-1.00(18H,m),0.97-0.91(6H,m),0.81(9H,s),0.76-0.59(4H,m),0.19--0.09(6H,m).
MS(APCI、ESI)m/z:964(M+H)+
上記工程9で得られた化合物(1-10)(8.12g,8.42mmol)のN,N-ジメチルホルムアミド(90mL)、水(2mL)溶液に、酢酸リチウム(0.611g,9.26mmol)を加え、室温下で撹拌した。原料消失後、反応混合物に水を加え、反応混合物を酢酸エチルで抽出した。有機層を水および飽和食塩水で洗浄し、無水硫酸ナトリウムで乾燥した。濾過後、減圧留去して得られた残渣をシリカゲルカラムクロマトグラフィ-[ヘキサン:酢酸エチル=100:0(v/v)~0:100(v/v)]にて精製し、目的物(1-11)(5.48g,81%)を得た。
1H-NMR(CDCl3)δ:8.76-8.60(1H,m),8.02-7.56(1H,m),7.45-7.44(2H,m),7.21(1H,s),7.10-7.09(2H,m),6.81-6.74(1H,m),6.65(1H,s),6.23(1H,s),6.01-5.99(1H,m),5.95-5.84(1H,m),5.41-5.20(2H,m),5.16(1H,m),4.84(1H,m),4.67-4.54(4H,m),4.05-4.03(1H,m),3.87(3H,s),3.71(1H,m),3.55-3.51(1H,m),3.26(1H,m),2.35(1H,m),2.18-2.12(1H,m),1.55-1.42(3H,m),0.97-0.92(6H,m),0.81(9H,s),0.76-0.61(4H,m),0.20--0.06(6H,m).
MS(APCI、ESI)m/z:808(M+H)+
[実施例10-2:中間体2]
グリシルグリシン(0.328g,2.49mmol)、N,N-ジイソプロピルエチルアミン(0.433mL,2.49mmol)のN,N-ジメチルホルムアミド(20mL)溶液に、1-{[4-(11,12-ジデヒドロジベンゾ[b,f]アゾシン-5(6H)-イル)-4-オキソブタノイル]オキシ}ピロリジン-2,5-ジオン(2-1)(1.00g,2.49mmol,Click Chemistry Tools)、水(10mL)を室温にて加え、同温度にて一晩撹拌した。減圧留去し、得られた残渣を、シリカゲルカラムクロマトグラフィー[クロロホルム~クロロホルム:メタノール:水=7:3:1(v/v/v)の分配有機層]にて精製し、目的物(0.930g,89%)を得た。
1H-NMR(DMSO-D6)δ:12.58(1H,s),8.14-8.12(1H,m),8.08-8.07(1H,m),7.69-7.68(1H,m),7.62-7.61(1H,m),7.53-7.45(3H,m),7.40-7.29(3H,m),5.05-5.01(1H,m),3.73-3.72(2H,m),3.66-3.60(3H,m),2.66-2.60(1H,m),2.33-2.24(1H,m),2.08-2.04(1H,m),1.81-1.77(1H,m).
MS(APCI、ESI)m/z:420[(M+H)+].
[実施例10-3:薬物リンカー1]
(2R,11aS)-8-(ベンジルオキシ)-2-{[tert-ブチル(ジメチル)シリル]オキシ}-7-メトキシ-10-{[2-(トリメチルシリル)エトキシ]メチル}-2,3-ジヒドロ-1H-ピロロ[2,1-c][1,4]ベンゾジアゼピン-5,11(10H,11aH)-ジオン(3-1)(25.5g,41.6mmol,WO2016149546)のテトラヒドロフラン(150mL)、エタノール(150mL)溶液に、窒素雰囲気下、5%パラジウム炭素(54%水分、10.0g)を加えた後、反応溶液を水素雰囲気下、室温にて三日間撹拌した。反応溶液にクロロホルムを加え、セライト濾過した後、濾液を減圧留去した。得られた残渣を、シリカゲルカラムクロマトグラフィー[ヘキサン:酢酸エチル=100:0(v/v)~50:50(v/v)]にて精製し、目的物(3-2)(19.4g,89%)を得た。
1H-NMR(CDCl3)δ:7.36(1H,s),7.25(1H,s),6.01(1H,s),5.45-5.43(1H,m),4.69-4.67(1H,m),4.60-4.55(1H,m),4.23-4.21(1H,m),3.96(3H,s),3.76-3.68(2H,m),3.63-3.61(1H,m),3.56-3.53(1H,m),2.88-2.83(1H,m),2.03-2.00(1H,m),1.00-0.98(2H,m),0.87(9H,s),0.10(6H,s),0.02(9H,s).
MS(APCI、ESI)m/z:523(M+H)+
上記工程1にて得られた化合物(3-2)(10.8g,20.7mmol)のN,N-ジメチルホルムアミド(30mL)溶液に、1,5-ジブロモペンタン(23.8g,103mmol)、炭酸カリウム(3.43g,24.8mmol)を室温で加えた。室温で3時間撹拌した後、反応溶液に水を加え、酢酸エチルで抽出した。得られた有機層を飽和食塩水で洗浄し、硫酸ナトリウムで乾燥した後、減圧留去した。得られた残渣をシリカゲルカラムクロマトグラフィー[ヘキサン:酢酸エチル=90:10(v/v)~50:50(v/v)]にて精製し、目的物(3-3)(14.5g,定量的)を得た。
1H-NMR(CDCl3)δ:7.34(1H,s),7.21(1H,s),5.52-5.49(1H,m),4.63-4.62(1H,m),4.58-4.55(1H,m),4.24-4.22(1H,m),4.07-4.04(2H,m),3.92(3H,s),3.82-3.64(3H,m),3.56-3.53(1H,m),3.45-3.43(2H,m),2.86-2.84(1H,m),2.04-2.00(1H,m),1.97-1.87(4H,m),1.66-1.62(2H,m),1.01-0.98(2H,m),0.87(9H,s),0.10(6H,s),0.04(9H,s).
MS(APCI、ESI)m/z:673[81Br,(M+H)+],671[79Br,(M+H)+].
上記工程2にて得られた化合物(3-3)(21.5mmol)のテトラヒドロフラン(40mL)溶液に、1mol/Lのテトラブチルアンモニウムフロリド テトラヒドロフラン溶液(28.0mL,28.0mmol)を0℃にて加えた。室温にて30分間撹拌した後、反応溶液に水を加え、酢酸エチルで抽出し、得られた有機層を飽和食塩水で洗浄した。硫酸ナトリウムで乾燥した後、減圧留去した。得られた残渣をシリカゲルカラムクロマトグラフィー[クロロホルム:メタノール=97.5:2.5(v/v)~92.5:7.5(v/v)]にて精製し、目的物(3-4)(11.3g,94%)を得た。
MS(APCI、ESI)m/z:559[81Br,(M+H)+],557[79Br,(M+H)+].
上記工程3にて得られた化合物(3-4)(11.3g,20.2mmol)、テトラブチルアンモニウムブロミド(0.325g,1.01mmol)、臭化カリウム(0.240g,2.02mmol,)を飽和炭酸水素ナトリウム水溶液(60mL)、ジクロロメタン(60mL)に溶解させ、nor-AZADO(0.0279g,0.202mmol)、次亜塩素酸ナトリウム五水和物(2.03g,27.2mmol)を0℃にて加え、0℃にて30分間撹拌した。原料が残存したため、次亜塩素酸ナトリウム五水和物(1.00g、13.4mmol)を0℃にて加え、0℃にて15分撹拌した。さらに次亜塩素酸ナトリウム五水和物(0.300g、4.03mmol)を0℃にて加え、0℃にて15分撹拌し、原料の消失をTLCにて確認した。反応溶液にチオ硫酸ナトリウム水溶液を加え、クロロホルムで抽出し、得られた有機層を硫酸ナトリウムで乾燥した。減圧留去し、得られた残渣をシリカゲルカラムクロマトグラフィー[ヘキサン:酢酸エチル=75:25(v/v)~40:60(v/v)]にて精製し、目的物(3-5)(9.74g,87%)を得た。
1H-NMR(CDCl3)δ:7.33(1H,s),7.24(1H,s),5.56-5.53(1H,m),4.71-4.69(1H,m),4.66-4.63(1H,m),4.27-4.22(1H,m),4.12-4.02(2H,m),3.93-3.88(4H,m),3.82-3.75(1H,m),3.69-3.67(1H,m),3.61-3.56(1H,m),3.46-3.44(2H,m),2.82-2.77(1H,m),1.97-1.89(4H,m),1.68-1.64(2H,m),1.05-0.93(2H,m),0.04(9H,s).
MS(APCI、ESI)m/z:557[81Br,(M+H)+],555[79Br,(M+H)+].
上記工程4にて得られた化合物(3-5)(9.74g,17.5mmol)のジクロロメタン(160mL)溶液に、2,6-ルチジン(8.17mL,70.1mmol)を-40℃にて加え、-40℃にて10分間撹拌した。反応溶液に無水トリフルオロメタンスルホン酸(8.85mL,52.6mmol)を-40℃にて加え、-40℃にて30分間撹拌した。反応溶液に10%クエン酸水溶液を加え、クロロホルムで抽出し、得られた有機層を硫酸ナトリウムで乾燥した。減圧留去し、得られた残渣をシリカゲルカラムクロマトグラフィー[ヘキサン:酢酸エチル=95:5→70:35]にて精製した後,NH2シリカゲルクロマトグラフィー[ヘキサン:酢酸エチル=95:5(v/v)~65:35(v/v)]にて精製し、目的物(3-6)(7.10g,59%)を得た。
1H-NMR(CDCl3)δ:7.32(1H,s),7.24(1H,s),7.15-7.14(1H,m),5.56-5.53(1H,m),4.70-4.68(1H,m),4.66-4.63(1H,m),4.11-4.01(2H,m),3.94-3.90(4H,m),3.84-3.75(1H,m),3.73-3.68(1H,m),3.46-3.44(2H,m),3.18-3.14(1H,m),1.96-1.88(4H,m),1.69-1.61(2H,m),1.02-0.92(2H,m),0.04(9H,s).
MS(APCI、ESI)m/z:689[81Br,(M+H)+],687[79Br,(M+H)+].
上記工程5にて得られた化合物(3-6)(2.00g,2.91mmol)、4-メトキシフェニルボロン酸(0.884g,5.82mmol)、テトラキス(トリフェニルホスフィン)パラジウム(0)(0.336g,0.291mmol)、炭酸ナトリウム(1.23g,11.6mmol)の混合物にトルエン(20mL)、エタノール(10mL)、水(10mL)を室温にて加えた。反応溶液を室温にて30分撹拌した後、反応溶液を酢酸エチルで抽出し、水、飽和食塩水で洗浄した。有機層を硫酸ナトリウムで乾燥後、減圧留去した。得られた残渣をシリカゲルカラムクロマトグラフィー[ヘキサン:酢酸エチル=90:10(v/v)~50:50(v/v)]にて精製し、目的物(3-7)(1.71g,91%)を得た。
1H-NMR(CDCl3)δ:7.38-7.37(3H,m),7.33(1H,s),7.25(1H,s),6.89-6.88(2H,m),5.56-5.54(1H,m),4.71-4.68(1H,m),4.65-4.62(1H,m),4.09-4.04(2H,m),3.96-3.91(4H,m),3.85-3.66(5H,m),3.46-3.45(2H,m),3.16-3.12(1H,m),1.99-1.94(4H,m),1.69-1.64(2H,m),1.00-0.98(2H,m),0.04(9H,s).
MS(APCI、ESI)m/z:647[81Br,(M+H)+],645[79Br,(M+H)+].
上記工程6にて得られた化合物(3-7)(0.789g,1.22mmol)をエタノール(10mL)、テトラヒドロフラン(10mL)に溶解し、2.0Mの水素化ホウ素リチウムテトラヒドロフラン溶液(6.11mL,12.2mmol)を0℃にて加え、0℃にて3時間撹拌した。反応溶液に水を加え、クロロホルムで抽出し、得られた有機層を硫酸ナトリウムで乾燥した。減圧留去し、得られた残渣をジクロロメタン(10mL)、エタノール(20mL)、水(10mL)に溶解し、シリカゲル(4g)を室温にて加え、室温で4日間撹拌した。シリカゲルをろ過により除き、水を加え、クロロホルムで抽出し、得られた有機層を硫酸ナトリウムで乾燥した。減圧留去し、得られた残渣をシリカゲルカラムクロマトグラフィー[ヘキサン:酢酸エチル=60:40(v/v)~25:75(v/v)]にて精製し、目的物(3-8)(0.496g,81%)を得た。
1H-NMR(CDCl3)δ:7.90-7.89(1H,m),7.53(1H,s),7.40-7.40(1H,m),7.35-7.34(2H,m),6.92-6.90(2H,m),6.83-6.81(1H,m),4.43-4.40(1H,m),4.13-4.06(2H,m),3.96(3H,s),3.84(3H,s),3.61-3.57(1H,m),3.47-3.36(3H,m),2.00-1.92(4H,m),1.67-1.63(2H,m).
MS(APCI、ESI)m/z:501[81Br,(M+H)+],499[79Br,(M+H)+].
上記工程7にて得られた化合物(3-8)(0.496g,0.992mmol)のジクロロメタン(20mL)溶液にナトリウムトリアセトキシボロヒドリド(0.421g,1.99mmol)を0℃にて加えた。室温にて2時間撹拌した後、飽和炭酸水素ナトリウム水溶液を加え、クロロホルムで抽出した。有機層を硫酸ナトリウムで乾燥し、減圧留去した後、得られた残渣をシリカゲルカラムクロマトグラフィー[ヘキサン:酢酸エチル=60:40(v/v)~25:75(v/v)]にて精製し、目的物(3-9)(0.426g,86%)を得た。
1H-NMR(CDCl3)δ:7.53-7.53(2H,m),7.32-7.30(2H,m),6.89-6.87(2H,m),6.05(1H,s),4.33-4.27(2H,m),4.00-3.98(2H,m),3.86(3H,s),3.82(3H,s),3.57-3.55(2H,m),3.42-3.38(3H,m),2.76-2.72(1H,m),1.96-1.88(4H,m),1.65-1.62(2H,m).
MS(APCI、ESI)m/z:503[81Br,(M+H)+],501[79Br,(M+H)+].
上記工程8にて得られた化合物(3-9)(0.426g,0.849mmol)のジクロロメタン(30mL)溶液に、ピリジン(0.102mL1.27mmol)、クロロぎ酸アリル(0.374mL,3.54mmol)を0℃にて加え、0℃にて15分間撹拌した。反応溶液に10%クエン酸水溶液を加え、クロロホルムで抽出し、得られた有機層を飽和炭酸水素ナトリウム水溶液で洗浄後、硫酸ナトリウムで乾燥した。減圧留去し、得られた残渣をシリカゲルカラムクロマトグラフィー[ヘキサン:酢酸エチル=90:10(v/v)~50:50(v/v)]にて精製し、目的物(3-10)(0.465g,94%)を得た。
1H-NMR(CDCl3)δ:7.38(1H,s),7.31-7.29(2H,m),7.26-7.25(1H,m),6.89-6.87(2H,m),6.71(1H,s),5.80-5.78(1H,m),5.14-5.11(2H,m),4.65-4.62(1H,m),4.39-4.26(3H,m),4.03-4.01(2H,m),3.92(3H,s),3.82(3H,s),3.66-3.64(1H,m),3.46-3.44(2H,m),3.30-3.27(1H,m),2.72-2.68(1H,m),1.96-1.88(4H,m),1.68-1.60(2H,m).
MS(APCI、ESI)m/z:587[81Br,(M+H)+],585[79Br,(M+H)+].
実施例10-1工程10にて得られた化合物(1-11)(0.130g,0.161mmol)と上記工程9にて得られた化合物(3-10)(0.104g,0.177mmol,)のN,N-ジメチルホルムアミド(3mL)溶液に炭酸カリウム(0.0266g,0.193mmol)を室温にて加え、室温にて一晩撹拌した。反応溶液を酢酸エチルで希釈し、水、飽和食塩水で洗浄した後、硫酸ナトリウムで乾燥した。減圧留去した後、得られた残渣をNH2-シリカゲルカラムクロマトグラフィー[ヘキサン:酢酸エチル=70:30(v/v)~0:100(v/v)]にて精製し、目的物(3-11)(0.184g,87%)を得た。
1H-NMR(CDCl3)δ:8.76(1H,s),7.58-7.56(2H,m),7.39(1H,s),7.32-7.30(2H,m),7.26-7.24(2H,m),7.19-7.17(3H,m),6.90-6.88(2H,m),6.78(1H,s),6.68-6.66(1H,m),6.37(1H,s),5.99-5.93(3H,m),5.34-5.20(6H,m),4.66-4.01(11H,m),3.90(3H,s),3.89(3H,s),3.78-3.54(9H,m),3.31-3.28(2H,m),2.73-2.69(1H,m),2.38-2.35(1H,m),2.19-2.13(1H,m),1.82-1.80(2H,m),1.46-1.29(6H,m),0.98-0.90(6H,m),0.83(9H,s),0.69-0.63(4H,m),0.19-0.16(6H,m).
MS(APCI、ESI)m/z:1312(M+H)+
上記工程10にて得られた化合物(3-11)(0.1837g,0.140mmol)と酢酸(0.048mL,0.840mmol)のテトラヒドロフラン(5.00mL)溶液に1mol/Lのテトラブチルアンモニウムフロリド テトラヒドロフラン溶液(0.700mL,0.700mmol)を室温にて加え、室温にて3時間撹拌した。反応溶液を酢酸エチルで希釈し、有機層を飽和炭酸水素ナトリウム水溶液、飽和食塩水で洗浄した後、硫酸ナトリウムで乾燥した。減圧留去した後、得られた残渣をシリカゲルクロマトグラフィー[クロロホルム:メタノール=99.5:0.5(v/v)~95:5(v/v)]にて精製し、目的物(3-12)(0.178g、定量的)を得た。
1H-NMR(CDCl3)δ:8.86(1H,s),7.60-7.59(2H,m),7.39(1H,s),7.32-7.20(7H,m),6.90-6.88(2H,m),6.78(1H,s),6.68(1H,s),6.38(1H,s),5.90-5.87(3H,m),5.39-5.22(6H,m),4.72-4.02(11H,m),3.90(3H,s),3.88(3H,s),3.83(3H,s),3.70-3.63(6H,m),3.32-3.29(3H,m),2.73-2.69(1H,m),2.43-2.40(1H,m),2.12-2.06(1H,m),1.77-1.74(2H,m),1.39-1.25(6H,m),0.96-0.89(6H,m),0.73-0.66(4H,m).
MS(APCI、ESI)m/z:1198(M+H)+
上記工程11にて得られた化合物(3-12)(0.140mmol)のジクロロメタン(2mL)溶液に、室温にてピロリジン(0.0579mL,0.700mmol)、テトラキス(トリフェニルホスフィン)パラジウム(0)(0.0162g,0.0140mmol)を加え、室温にて15分撹拌した。減圧留去した後、得られた残渣をシリカゲルクロマトグラフィー[クロロホルム:メタノール=99.5:0.5(v/v)~92.5:7.5(v/v)]にて精製し、目的物(3-13)(0.143g,99%)を得た。
1H-NMR(CDCl3)δ:9.12(1H,s),7.94-7.92(1H,m),7.57-7.53(4H,m),7.33-7.31(2H,m),7.20-7.18(3H,m),6.90-6.88(2H,m),6.36(1H,s),6.07(1H,s),5.91-5.88(1H,m),5.47-5.44(1H,m),5.21-5.13(1H,m),4.66-4.58(3H,m),4.32(1H,s),4.03-3.49(17H,m),3.38-3.29(4H,m),3.15-3.14(1H,m),2.77-2.73(1H,m),2.57(2H,s),2.43-2.40(1H,m),2.32-2.27(1H,m),1.81-1.39(8H,m),0.98-0.96(3H,m),0.85-0.83(3H,m),0.75-0.62(4H,m).
MS(APCI、ESI)m/z:1030(M+H)+
実施例10-2工程1にて得られた化合物(2-2)(0.0640g,0.153mmol)、N-エトキシカルボニル-2-エトキシ-1,2-ジヒドロキノリン(0.0446g,0.180mmol)の混合物にジクロロメタン(2mL)を室温にて加え、室温にて15分撹拌した。反応溶液に上記工程12にて得られた化合物(3-13)(0.143g,0.139mmol)のジクロロメタン(2mL)溶液を加え、室温にて五時間撹拌した後、減圧留去した。得られた残渣をシリカゲルクロマトグラフィークロロホルム:メタノール=99.5:0.5(v/v)~92.5:7.5(v/v)]で精製し、目的物(3-14)(0.103g,52%)を得た。
1H-NMR(DMSO-D6)δ:9.93(1H,s),8.21-8.16(2H,m),8.07-8.04(1H,m),7.83-7.64(2H,m),7.60-7.55(3H,m),7.51-7.28(10H,m),7.19-7.16(2H,m),7.10-7.04(1H,m),6.92-6.90(2H,m),6.76-6.70(1H,m),6.39(1H,s),5.77-5.75(1H,m),5.21-5.18(1H,m),5.03-4.99(1H,m),4.82-4.79(1H,m),4.37-4.35(1H,m),4.21-4.20(2H,m),4.02-3.24(26H,m),3.16-3.13(1H,m),2.79-2.59(2H,m),2.39-2.28(2H,m),
2.05-1.97(2H,m),1.91-1.77(4H,m),1.57-1.54(3H,m),1.28-1.23(3H,m),
0.85-0.80(6H,m),0.67-0.61(4H,m).
MS(APCI、ESI)m/z:1431(M+H)+
[実施例10-4:薬物リンカー2]
実施例10-3工程1にて得られた化合物(3-2)(5.06g,9.67mmol)と1,3-ジブロモプロパン(4.93mL,48.4mmol)を、実施例10-3工程2と同様に反応させ、目的物(4-1)(4.85g,78%)を得た。
1H-NMR(CDCl3)δ:7.35(1H,s),7.26(1H,s),5.52-5.50(1H,m),4.65-4.63(1H,m),4.61-4.55(1H,m),4.25-4.14(3H,m),3.92(3H,s),3.82-3.62(5H,m),3.57-3.54(1H,m),2.86-2.84(1H,m),2.41-2.39(2H,m),2.06-1.99(1H,m),1.03-0.97(2H,m),0.87(9H,s),0.10(6H,s),0.04(9H,s).
MS(APCI、ESI)m/z:645[81Br,(M+H)+],643[79Br,(M+H)+].
上記工程1にて得られた化合物(4-1)(4.85g,7.54mmol)を、実施例10-3工程3と同様に反応させ、目的物(4-2)(4.05g,定量的)を得た。
1H-NMR(CDCl3)δ:7.35(1H,s),7.26(1H,s),5.53-5.51(1H,m),4.66-4.61(2H,m),4.32-4.30(1H,m),4.21-4.16(2H,m),3.91-3.85(4H,m),3.82-3.74(1H,m),3.71-3.59(4H,m),2.99-2.96(1H,m),2.43-2.37(2H,m),2.15-2.09(2H,m),1.04-0.96(2H,m),0.04(9H,s).
MS(APCI、ESI)m/z:531[81Br,(M+H)+],529[79Br,(M+H)+].
上記工程2にて得られた化合物(4-2)(7.54mmol)を、実施例10-3工程4と同様に反応させ、目的物(4-3)(3.73g,93%)を得た。
1H-NMR(CDCl3)δ:7.34(1H,s),7.29(1H,s),5.56-5.53(1H,m),4.72-4.69(1H,m),4.67-4.61(1H,m),4.23-4.17(3H,m),3.97-3.88(4H,m),3.82-3.75(1H,m),3.74-3.56(4H,m),2.82-2.77(1H,m),2.43-2.38(2H,m),1.06-0.94(2H,m),0.08-0.00(9H,m).
上記工程3にて得られた化合物(4-3)(3.73g,7.08mmol)を、実施例10-3工程5と同様に反応させ、目的物(4-4)(3.27g,70%)を得た。
MS(APCI、ESI)m/z:661[81Br,(M+H)+],659[79Br,(M+H)+].
上記工程4にて得られた化合物(4-4)(3.27g,4.96mmol)を、実施例10-3工程6と同様に反応させ、目的物(4-5)(2.49g,81%)を得た。
1H-NMR(DMSO-D6)δ:7.49-7.47(2H,m),7.40(1H,s),7.31-7.24(2H,m),6.93-6.88(2H,m),5.33-5.31(1H,m),5.25-5.18(1H,m),4.81-4.80(1H,m),4.23-4.10(2H,m),3.85(3H,s),3.77(3H,s),3.70-3.59(3H,m),3.52-3.40(2H,m),3.15-3.08(1H,m),2.33-2.27(2H,m),0.86-0.74(2H,m),-0.07(9H,s).
MS(APCI、ESI)m/z:619[81Br,(M+H)+],617[79Br,(M+H)+].
上記工程5にて得られた化合物(4-5)(2.49g,4.04mmol)を、実施例10-3工程7と同様に反応させ、目的物(4-6)(1.59g,84%)を得た。
MS(APCI、ESI)m/z:473[81Br,(M+H)+],471[79Br,(M+H)+].
上記工程6にて得られた化合物(4-6)(1.59g,3.38mmol)を、実施例10-3工程8と同様に反応させ、目的物(4-7)(1.39g,87%)を得た。
1H-NMR(CDCl3)δ:7.54(1H,s),7.54-7.51(1H,m),7.32-7.29(2H,m),6.89-6.87(2H,m),6.10(1H,s),4.32-4.28(2H,m),4.14-4.13(2H,m),3.85(3H,s),3.82(3H,s),3.63-3.62(2H,m),3.57-3.55(2H,m),3.40-3.36(1H,m),2.76-2.72(1H,m),2.40-2.37(2H,m).
MS(APCI、ESI)m/z:475[81Br,(M+H)+],473[79Br,(M+H)+].
上記工程7にて得られた化合物(4-7)(1.40g,0.2.95mmol)を、実施例10-3工程9と同様に反応させ、目的物(4-8)(0.885g,54%)を得た。
1H-NMR(CDCl3)δ:7.34(1H,s),7.27-7.25(2H,m),7.22(1H,s),6.86-6.84(2H,m),6.73(1H,s),5.76-5.74(1H,m),5.11-5.09(2H,m),4.62-4.59(2H,m),4.33-4.31(1H,m),4.16-4.13(3H,m),3.88(3H,s),3.79(3H,s),3.60-3.59(3H,m),3.27-3.23(1H,m),2.69-2.65(1H,m),2.37-2.34(2H,m).
MS(APCI、ESI)m/z:559[81Br,(M+H)+],557[79Br,(M+H)+].
上記工程8にて得られた化合物(4-8)(0.0381g,0.0683mmol)と実施例10-1工程10で得られた化合物(1-11)(0.0552g、0.0683mmol)を、実施例10-3工程10と同様に反応させ、目的物(4-9)(0.0712g,81%)を得た。
MS(APCI、ESI)m/z:1284(M+H)+.
上記工程9にて得られた化合物(4-9)(0.0712g,0.0554mmol)を、実施例10-3工程11と同様に反応させ、目的物(4-10)(0.0671g,定量的)を得た。
MS(APCI、ESI)m/z:1170(M+H)+.
上記工程10にて得られた化合物(4-10)(0.0571mmol)を、実施例10-3工程12と同様に反応させ、目的物(4-11)(0.0574g,99%)を得た。
1H-NMR(CDCl3)δ:9.16(1H,s),7.93-7.91(1H,m),7.55-7.52(1H,m),7.50-7.47(3H,m),7.35-7.32(2H,m),7.21(1H,s),7.13-7.11(2H,m),6.90-6.87(2H,m),6.40(1H,s),6.08(1H,s),5.90-5.87(1H,m),5.37-5.34(1H,m),4.73-4.53(3H,m),4.23-4.08(5H,m),3.89(3H,s),3.82(3H,s),3.78-3.72(5H,m),3.57-3.51(3H,m),3.38-3.30(3H,m),2.76-2.71(1H,m),2.36-2.24(4H,m),1.78-1.42(6H,m),1.00-0.98(3H,m),0.87-0.84(3H,m),0.74-0.62(4H,m).
MS(APCI、ESI)m/z:1002(M+H)+.
上記工程11にて得られた化合物(4-11)(0.189g,0.189mmol)と実施例10-2工程1で得られた化合物(2-2)(0.087g、0.207mmol)を、実施例10-3工程13と同様に反応させ、目的物(4-12)(0.169g,64%)を得た。
[実施例10-5:薬物リンカー3]
4,4’-[1,5-ペンタンジイルビス(オキシ)]ビス(5-メトキシ-2-ニトロ安息香酸)(5-1)(5.41g,10.9mmol,Journal of Medicinal Chemistry 2004,47,1161)のジクロロメタン(50mL)溶液に、0℃にて塩化オキサリル(5.63mL,65.7mmol)を加え、N,N-ジメチルホルムアミド(0.0844mL,1.09mmol)滴下した。反応溶液を室温まで昇温し、2時間撹拌した。減圧留去して得られた残渣をジクロロメタン(100mL)に溶解し、メチル(6S)-5-アザスピロ[2.4]ヘプタン-6-カルボキシレート塩酸塩(4.28g,24.1mmol,Tetrahedron Letters 2012. 53. 3847)とトリエチルアミン(6.07mL,43.8mmol)のジクロロメタン溶液(100mL)に窒素雰囲気下、-40℃で滴下した。反応溶液を0℃に昇温して2時間撹拌した。反応混合物に1規定塩酸(100mL)を加え、有機層を水、飽和食塩水で洗浄し、無水硫酸ナトリウムで乾燥した。減圧留去し、目的物(5-2)(8.40g、定量的)を得た。
1H-NMR(DMSO-D6)δ:7.71(2H,s),6.88(2H,s),4.63(2H,m),4.15-4.12(4H,m),3.94(6H,s),3.71(6H,s),3.25(2H,m),3.10(2H,m),2.31-2.28(2H,m),1.90-1.83(6H,m),1.60-1.58(2H,m),0.71-0.49(8H,m).
MS(APCI、ESI)m/z:769(M+H)+.
上記工程1にて得られた化合物(5-2)(8.40g,10.9mmol)のテトラヒドロフラン(100mL)溶液に、水素化ほう素リチウム(714mg,32.8mmol)を加え、0℃にて30分撹拌し、室温に昇温して1時間撹拌した。0℃にて1規定塩酸を加えた後、酢酸エチルで抽出し、飽和食塩水で洗浄した後、無水硫酸ナトリウムで乾燥させた。減圧下にて溶媒留去して、目的物(5-3)(7.70g,99%)を得た。
1H-NMR(DMSO-D6)δ:7.67(2H,s),7.05(2H,s),4.86-4.74(2H,m),4.22-4.12(6H,m),3.92(6H,s),3.83-3.73(2H,m),3.62-3.51(2H,m),3.29(1H,m),3.11(2H,m),2.96(1H,m),2.12-2.03(2H,m),1.82-1.77(6H,m),1.59-1.56(2H,m),0.67-0.41(8H,m).
MS(APCI、ESI)m/z:713(M+H)+.
上記工程2にて得られた化合物(5-3)(7.70g、10.8mmol)をピリジン(20mL)及び無水酢酸(10mL,105.9mmol)に溶解して、室温にて撹拌した。減圧留去して、目的物(5-4)(8.38g,97%)を得た。
1H-NMR(DMSO-D6)δ:7.68(2H,s),7.03(2H,s),4.47-4.46(2H,m),4.36-4.27(4H,m),4.13-4.11(6H,m),3.92(6H,s),3.16(2H,m),2.98(2H,m),2.17(1H,m),2.06(6H,s),1.84(4H,m),1.68(1H,m),1.58(2H,m),0.64-0.45(8H,m).
MS(APCI、ESI)m/z:797(M+H)+.
上記工程3にて得られた化合物(5-4)(8.28g,10.4mmol)のN,N-ジメチルホルムアミド(100mL)溶液に、5%パラジウム炭素(54%水分、1.00g)を加えた後、反応溶液を水素雰囲気下、室温にて6時間激しく撹拌した。セライトろ過した後、ろ液を減圧留去して得られた残渣をシリカゲルカラムクロマトグラフィー[クロロホルム:メタノール=100:0(v/v)~90:10(v/v)]にて精製し、目的物(5-5)(5.05g,66%)を得た。
1H-NMR(DMSO-D6)δ:6.66(2H,s),6.36(2H,s),5.11(4H,s),4.49(2H,s),4.19(4H,m),3.90(4H,m),3.62(6H,s),3.48-3.46(2H,m),3.33(2H,s),3.23-3.20(2H,m),2.01(6H,s),1.78-1.74(6H,m),1.55(2H,m),0.61-0.58(4H,m),0.49-0.48(4H,m).
MS(APCI、ESI)m/z:737(M+H)+.
上記工程4にて得られた化合物(5-5)(5.05g,6.85mmol)のジクロロメタン(100mL)溶液に、ピリジン(1.10mL,13.7mmol)を加え、窒素雰囲気下、-78℃にてクロロギ酸アリル(0.725mL,6.85mmol)を加え、2時間撹拌した。減圧留去して得られた残渣をシリカゲルカラムクロマトグラフィー[ヘキサン:酢酸エチル=70:30(v/v)~100:0(v/v)、クロロホルム:メタノール=100:0(v/v)~90:10(v/v)]にて精製し、目的物であるビスアリルオキシカルボニル体(5-6b)(1.36g,22%)と、モノアリルオキシカルボニル体(5-6)(2.63g,47%)を得た。
1H-NMR(DMSO-D6)δ:9.14(2H,s),7.14(2H,s),6.85(2H,s),5.94(2H,m),5.33(2H,m),5.21(2H,m),4.55(4H,m),4.47(1H,s),4.23(3H,s),3.96(4H,m),3.74(6H,s),3.34(6H,s),3.31(2H,m),3.21(2H,m),2.04(6H,s),1.79(4H,m),1.67(2H,m),1.56(2H,m),0.56-0.48(8H,m).
MS(APCI、ESI)m/z:905(M+H)+.
モノアリルオキシカルボニル体(5-6):
1H-NMR(DMSO-D6)
δ:9.14(1H,s),7.14(1H,s),6.85(1H,s),6.65(1H,s),6.35(1H,s),5.95(1H,m),5.33(1H,m),5.22(1H,m),5.11(2H,s),4.55(2H,m),4.48(2H,s),4.23-4.14(4H,m),3.96(2H,m),3.90(2H,m),3.74(3H,s),3.63(3H,s),3.49(1H,m),3.38-3.30(4H,m),3.21(1H,m),2.04(3H,s),2.01(3H,s),1.77(5H,m),1.68(1H,m),1.56(2H,m),0.63-0.48(8H,m).
MS(APCI、ESI)m/z:821(M+H)+.
上記工程5で得られたモノアリルオキシカルボニル体(5-6)(2.00g,2.44mmol)とN-[(プロプ-2-エン-1-イルオキシ)カルボニル]-L-バリル-N-[4-(ヒドロキシメチル)フェニル]-L-アラニンアミド(1.10g,2.92mmol,WO2011130598)を、実施例10-1工程6と同様に反応させ、目的物(5-7)(2.64g,89%)を得た。
1H-NMR(DMSO-D6)δ:10.02(1H,s),9.14(2H,s),8.18(1H,m),7.59(2H,m),7.33(2H,m),7.27(1H,m),7.14(2H,s),6.85(2H,s),5.99-5.86(2H,m),5.31(2H,n),5.19(2H,m),5.03(2H,s),4.55(2H,m),4.48(2H,n),4.41(2H,m),4.23-4.21(3H,m),3.94-3.91(4H,m),3.88-3.86(2H,m),3.74(3H,s),3.74(3H,s),3.34(4H,s),3.32-3.30(2H,m),3.20-3.18(2H,m),2.03(6H,s),1.96(1H,m),1.79(4H,s),1.66(1H,m),1.55(2H,s),1.30(3H,m),0.88(3H,m),0.83(3H,m),0.54-0.49(8H,m).
MS(APCI、ESI)m/z:1224(M+H)+.
上記工程6にて得られた化合物(5-7)(2.64g,2.16mmol)のメタノール(10mL)溶液に、炭酸カリウム(1.49g,10.8mmol)を加え、室温で3時間撹拌した。反応混合物に飽和塩化アンモニウム水溶液(100mL)を加え、酢酸エチルで抽出した。有機層を無水硫酸ナトリウムで乾燥させた。減圧留去して、目的物(5-8)(2.21g,90%)を得た。
1H-NMR(DMSO-D6)δ:10.04(1H,s),9.18(1H,s),8.18(1H,m),7.59(2H,m),7.33(2H,m),7.26(1H,m),7.22(1H,s),7.14(2H,s),6.89(2H,s),5.98-5.86(2H,m),5.31(2H,m),5.19(2H,m),5.04(2H,s),4.80(2H,m),4.55(2H,m),4.48(2H,m),4.41(1H,m),4.26(2H,s),3.96-3.94(4H,m),3.90-3.85(1H,m),3.74(6H,s),3.59(2H,m),3.33(6H,s),3.09(1H,m),1.93-1.83(8H,m),1.57-1.54(2H,m),1.30(3H,m),0.88(3H,m),0.83(3H,m),0.52-0.43(8H,m).
MS(APCI、ESI)m/z:1140(M+H)+.
上記工程7にて得られた化合物(5-8)(2.03g,1.78mmol)のジクロロメタン(50mL)溶液に、デスマーチンペルヨージナン(1.59g,3.74mmol)を加え、室温で一晩撹拌した。反応混合物に飽和炭酸水素ナトリウム水溶液(100mL)を加え、クロロホルムで抽出した。有機層を無水硫酸ナトリウムで乾燥させた。減圧留去して得られた残渣をシリカゲルカラムクロマトグラフィー[クロロホルム:メタノール=100:0(v/v)~90:10(v/v)]にて精製し、目的物(5-9)(2.05g,定量的)を得た。
1H-NMR(DMSO-D6)δ:9.99(1H,s),8.16(1H,m),7.54(2H,m),7.32-7.22(3H,m),7.08-7.04(2H,m),6.80-6.72(2H,m),6.55(2H,s),5.94-5.86(2H,m),5.75(2H,m),5.31-5.04(2H,m),4.81(1H,m),4.62(1H,m),4.48-4.38(4H,m),4.00-3.87(4H,m),3.79-3.76(7H,m),3.54(2H,m),3.42-3.40(2H,m),3.33(4H,s),3.14(2H,m),2.35(2H,m),1.80-1.78(4H,m),1.59-1.56(4H,m),1.29(3H,m),0.87(3H,m),0.83(3H,m),0.70-0.59(8H,m).
MS(APCI、ESI)m/z:1136(M+H)+.
上記工程8にて得られた化合物(5-9)(2.05g,1.80mmol)を、実施例10-3工程12と同様に反応させ、目的物(5-10)(1.02g,60%)を得た。
1H-NMR(DMSO-D6)δ:10.08(1H,s),7.57(2H,m),7.32-7.20(3H,m),7.05(2H,s),6.68-6.60(3H,m),5.74(1H,m),4.99-4.58(4H,m),3.99-3.94(4H,m),3.78-3.73(6H,m),3.66-3.38(4H,m),3.15-3.01(3H,m),2.40-2.34(3H,m),1.89-1.81(6H,m),1.57-1.53(4H,m),1.28(3H,m),0.88(3H,m),0.78(3H,m),0.64-0.55(8H,m).
MS(APCI、ESI)m/z:950(M+H)+.
上記工程9にて得られた化合物(5-10)(0.710g,0.747mmol)と実施例10-2工程1にて得られた化合物(2-2)(0.313g、0.747mmol)をジクロロメタン(1.5mL)とメタノール(0.1mL)の混合溶媒に溶解した。4-(4,6-ジメトキシ-1,3,5-トリアジン-2-イル)-4-メチルモルホリニウムクロリド(0.264g,0.897mmol)を加え、室温で1時間撹拌した。減圧留去して得られた残渣を、シリカゲルカラムクロマトグラフィー[クロロホルム:メタノール=100:0(v/v)~80:20(v/v)]にて精製し目的物(5-11)(0.671g,66%)を得た。
1H-NMR(DMSO-D6)δ:9.91(1H,s),8.32(1H,s),8.23-7.91(3H,m),7.81-7.19(14H,m),7.04(1H,m),6.80-6.62(3H,m),5.77-5.75(1H,m),5.20(1H,m),5.01(1H,m),4.79(1H,m),4.46-4.35(1H,m),4.04(4H,m),3.86-3.38(18H,m),3.22-3.15(2H,m),2.67-2.63(1H,m),2.46-2.23(3H,m),2.09-1.91(2H,m),1.80-1.78(5H,m),1.57(3H,m),1.27(3H,s),1.11-1.04(1H,m),0.87-0.79(6H,m),0.63-0.55(6H,m).
MS(APCI、ESI)m/z:1351(M+H)+.
[実施例10-6:薬物リンカー4]
4-(ベンジルオキシ)-5-メトキシ-2-ニトロ安息香酸(6-1)(6.07g,20.0mmol,Tetrahedron 1995,51,5617)、N,N-ジメチルホルムアミド(1.08mL,13.9mmol)のジクロロメタン(100mL)溶液に、氷冷下にて塩化オキサリル(3.43mL,40.0mmol)を5分間かけて滴下した。室温にて反応溶液を5時間撹拌した後、減圧留去し、得られた残渣をジクロロメタン(20mL)に溶解させ、減圧留去した。この操作を3回繰り返した後に、残渣をジクロロメタン(5mL)に懸濁させ、これに過剰のジエチルエーテルとヘキサンを加え、ろ過し、減圧下に乾燥させることにより粗酸クロリドを得た。得られた酸クロリドをジクロロメタンに溶解させ、-40℃(ドライアイス-アセトニトリル浴)に冷却し、メチル(6S)-5-アザスピロ[2.4]ヘプタン-6-カルボキシレート塩酸塩(4.22g,22.0mmol,Tetrahedron Letters 2012.53.3847)、トリエチルアミン(3.36mL,24.2mmol)を徐々に加えた。反応混合物を一晩かけて室温にまで昇温した。反応混合物に1規定塩酸を加え、反応混合物をジクロロメタンで抽出した。有機層を水,飽和炭酸水素ナトリウム水溶液および飽和食塩水で洗浄し、無水硫酸ナトリウムで乾燥した。減圧留去して得られた残渣を、シリカゲルカラムクロマトグラフィー[ヘキサン:酢酸エチル=100:0~50:50]にて精製し、目的物(6-2)(6.55g,80%)を得た。
上記工程1にて得られた化合物(6-2)(6.55g,16.0mmol)のエタノール(150mL),テトラヒドロフラン(150mL)溶液に窒素雰囲気下、ラネーニッケル(7.00g)を加えた。反応混合物にヒドラジン一水和物(7mL)を加え、50℃まで徐々に昇温した。50℃にて2時間撹拌した後にラネーニッケル(3.00g)、ヒドラジン一水和物(3mL)を加え、1時間撹拌した。反応混合物にTHF(100mL)を加えて、セライトろ過した。減圧留去して得られた残渣を、シリカゲルカラムクロマトグラフィー[ヘキサン:酢酸エチル=100:0~25:75]にて精製し、目的物(6-3)(4.42g,73%)を得た。
1H-NMR(CDCl3)δ:7.82(1H,s),7.48(1H,s),7.42-7.35(4H,m),7.32-7.31(1H,m),6.44(1H,s),5.16(2H,s),4.16-4.10(1H,m),3.93(3H,s),3.78-3.76(1H,m),3.39-3.37(1H,m),2.45-2.43(1H,m),2.24-2.21(1H,m),0.83-0.61(4H,m).
MS(APCI、ESI)m/z:379(M+H)+
上記工程2にて得られた化合物(6-3)(10.0g,26.4mmol)のテトラヒドロフラン(150mL)溶液に-40℃にて、2.6mol/Lのノルマルブチルリチウムノルマルヘキサン溶液(12.0mL,31.8mmol)をゆっくりと滴下した。反応溶液を-40℃にて15分間撹拌し後、2-(クロロメトキシ)エチルトリメチルシラン(5.57mL,31.7mmol)をゆっくりと滴下した。反応溶液を室温にて3時間撹拌した後、水を加え酢酸エチルで抽出した。有機層を水および飽和食塩水で洗浄し、無水硫酸ナトリウムで乾燥した。減圧留去して得られた残渣を、シリカゲルカラムクロマトグラフィー[ヘキサン:酢酸エチル=100:0~30:70]にて精製し、目的物(6-4)(11.8g,88%)を得た。
1H-NMR(CDCl3)δ:7.45-7.44(2H,m),7.37-7.32(4H,m),7.28(1H,s),5.48-5.46(1H,m),5.21(2H,s),4.50-4.48(1H,m),4.22-4.20(1H,m),3.95(3H,s),3.73-3.70(2H,m),3.62-3.60(1H,m),3.41-3.38(1H,m),2.45-2.43(1H,m),2.23-2.20(1H,m),0.98-0.96(2H,m),0.83-0.68(4H,m),0.04(9H,s).
MS(APCI、ESI)m/z:509(M+H)+
上記工程3にて得られた化合物(6-4)(18.7g,36.8mmol)のテロラヒドロフラン(50mL)、エタノール(100mL)溶液に、窒素雰囲気下において5%のパラジウム炭素触媒(5.00g)を加えた。直ちに窒素風船を水素風船に付け替え、反応混合物を水素雰囲気下にて6時間撹拌した。反応混合物にクロロホルムを加えて希釈し、セライトろ過をした後、濾液を減圧留去して得られた残渣を、シリカゲルカラムクロマトグラフィー[ヘキサン:酢酸エチル=100:0~25:75]にて精製し、目的物(6-5)(15.1g,98%)を得た。
1H-NMR(CDCl3)δ:7.38(1H,s),7.28(1H,s),6.01(1H,s),5.49-5.47(1H,m),4.70-4.68(1H,m),4.24-4.22(1H,m),3.96(3H,s),3.76-3.71(2H,m),3.66-3.64(1H,m),3.42-3.39(1H,m),2.47-2.45(1H,m),2.23-2.21(1H,m),1.01-0.99(2H,m),0.89-0.63(4H,m),0.03(9H,s).
MS(APCI、ESI)m/z:419(M+H)+
上記工程4にて得られた化合物にて得られた化合物(6-5)(2.77g,6.62mmol)を、実施例10-3工程2と同様に反応させ、目的物(6-6)(3.31g,88%)を得た。
1H-NMR(CDCl3)δ:7.36(1H,s),7.25(1H,s),5.55(1H,m),4.65(1H,m),4.24-4.23(1H,m),4.11-4.03(2H,m),3.93(3H,s),3.85-3.78(1H,m),3.72-3.69(2H,m),3.46-3.39(3H,m),2.47-2.44(1H,m),2.25-2.22(1H,m),1.95-1.91(4H,m),1.67-1.59(1H,m),1.03-0.95(2H,m),0.90-0.85(1H,m),0.70-0.66(4H,m),0.05(9H,s).
上記工程5にて得られた化合物(6-6)(3.31g,5.83mmol)を、実施例10-3工程7と同様に反応させ、目的物(6-7)(1.11g,45%)を得た。
1H-NMR(CDCl3)δ:7.81(1H,m),7.53(1H,s),6.82(1H,s),4.13-4.06(2H,m),3.97(3H,s),3.88-3.83(1H,m),3.69(1H,m),3.52-3.39(3H,m),2.55-2.52(1H,m),2.06-1.89(5H,m),1.67-1.63(2H,m),0.76-0.72(4H,m).
上記工程6にて得られた化合物(6-7)(2.56g,6.08mmol)を、実施例10-3工程8と同様に反応させ、目的物(6-8)(1.15g,45%)を得た。
1H-NMR(CDCl3)δ:7.60(1H,s),6.07(1H,s),4.11-4.04(1H,m),3.99(2H,m),3.87-3.84(1H,m),3.85(3H,s),3.73(1H,m),3.58-3.53(2H,m),3.47-3.42(3H,m),2.03-1.78(6H,m),1.65-1.63(2H,m),0.77-0.56(4H,m).
上記工程7にて得られた化合物(6-8)(1.15g,2.72mmol)を、実施例10-3工程9と同様に反応させ、目的物(6-9)(1.14g,82%)を得た。
1H-NMR(CDCl3)δ:7.23(1H,s),6.69(1H,s),5.79(1H,s),5.13-5.10(2H,m),4.68-4.66(1H,m),4.48-4.45(2H,m),4.01(2H,m),3.92(3H,s),3.76(1H,m),3.54-3.37(3H,m),2.39(1H,m),1.95-1.90(4H,m),1.68-1.61(3H,m),1.44(1H,m),0.75-0.66(4H,m).
上記工程8にて得られた化合物(6-9)(0.374g,0.737mmol)と実施例10-1工程10にて得られた化合物(1-11)(0.452g、0.56mmol)を、実施例10-3工程10と同様に反応させ、目的物(6-10)(0.589g,65%)を得た。
MS(APCI、ESI)m/z:1234(M+H)+
上記工程9にて得られた化合物(6-10)(0.589g,0.477mmol)を、実施例10-3工程11と同様に反応させ、目的物(6-11)(0.382g,71%)を得た。
1H-NMR(CDCl3)δ:8.90(1H,s),7.55(2H,m),7.25-7.21(2H,m),6.74(2H,m),6.38(1H,s),5.90-5.87(5H,m),5.33-5.09(8H,m),4.66-4.60(8H,m),3.98-3.91(10H,m),3.77-3.30(12H,m),2.42-2.36(2H,m),1.77-1.39(6H,m),0.91-0.70(14H,m).
上記工程10にて得られた化合物(6-11)(0.382g,0.341mmol)を、実施例10-3工程12と同様に反応させ、目的物(6-12)(0.200g,62%)を得た。
MS(APCI、ESI)m/z:952(M+H)+
上記工程11にて得られた化合物(6-12)(0.0560g,0.0588mmol)と実施例10-2工程1にて得られた化合物(2-2)(0.022g、0.053mmol)を、実施例10-3工程13と同様に反応させ、目的物(6-13)(0.0500g,63%)を得た。
[薬物部分の合成]
[実施例10-7:薬物1]
実施例1工程5にて得られた化合物(1-6)(4.59g,8.15mmol)を、実施例10-3工程9と同様に反応させ、目的物(7-1)(4.86g,92%)を得た。
1H-NMR(CDCl3)δ:8.97(1H,s),7.77(1H,s),6.77(1H,s),5.97-5.94(1H,m),5.39-5.21(2H,m),4.67-4.59(3H,m),4.00-3.98(1H,m),3.74-3.66(5H,m),3.05-3.03(1H,m),2.30-2.28(1H,m),1.72-1.70(1H,m),1.30-1.27(3H,m),1.11-1.05(18H,m),0.99-0.91(9H,m),0.61-0.53(4H,m),0.10-0.06(6H,m). MS(APCI、ESI)m/z:647(M+H)+
上記工程1にて得られた化合物(7-1)(4.86g,7.51mmol)を、実施例10-1工程7と同様に反応させ、目的物(7-2)(3.42g,86%)を得た。
1H-NMR(CDCl3)δ:8.52(1H,s),7.71(1H,s),6.77(1H,s),6.00-5.94(1H,m),5.35-5.27(2H,m),4.65-4.64(3H,m),4.33-4.31(1H,m),3.82-3.77(5H,m),3.68-3.66(1H,m),3.15-3.13(1H,m),1.89-1.86(2H,m),1.30-1.26(3H,m),1.14-1.10(18H,m),0.66-0.51(4H,m).
MS(APCI、ESI)m/z:533(M+H)+
上記工程2にて得られた化合物(7-2)(6.68g,12.5mmol)を、実施例10-1工程8と同様に反応させ、目的物(7-3)(6.44g,97%)を得た。
1H-NMR(CDCl3)δ:7.20(1H,s),6.69(1H,s),5.89-5.78(2H,m),5.18-5.15(2H,m),4.62-4.60(1H,m),4.49-4.47(1H,m),3.85(3H,s),3.74-3.71(1H,m),3.59-3.57(1H,m),3.33-3.30(2H,m),2.43-2.40(1H,m),1.76-1.73(1H,m),1.28-1.20(3H,m),1.09-1.07(18H,m),0.74-0.65(4H,m).
MS(APCI、ESI)m/z:531(M+H)+
上記工程3にて得られた化合物(7-3)(3.24g,6.10mmol)を、実施例10-1工程9と同様に反応させ、目的物(7-4)(3.86g,98%)を得た。
1H-NMR(CDCl3)δ:7.20(1H,s),6.67(1H,s),6.01-5.98(1H,m),5.79-5.73(1H,m),5.14-5.10(2H,m),4.64-4.61(1H,m),4.37-4.34(1H,m),3.86(3H,s),3.72-3.69(1H,m),3.52-3.50(1H,m),3.29-3.26(1H,m),2.38-2.34(1H,m),1.55-1.51(1H,m),1.28-1.24(3H,m),1.15-1.07(18H,m),0.81-0.66(13H,m),0.21(3H,s),0.18(3H,s). MS(APCI、ESI)m/z:645(M+H)+
上記工程4にて得られた化合物(7-4)(4.49g,6.96mmol)を、実施例10-1工程10と同様に反応させ、目的物(7-5)(3.24g,95%)を得た。
1H-NMR(CDCl3)δ:7.25(1H,s),6.73(1H,s),6.02-6.00(1H,m),5.91(1H,s),5.77-5.75(1H,m),5.11-5.09(2H,m),4.64-4.62(1H,m),4.41-4.40(1H,m),3.95(3H,s),3.72-3.70(1H,m),3.54-3.53(1H,m),3.29-3.26(1H,m),2.36-2.34(1H,m),1.56-1.54(1H,m),0.79-0.67(13H,m),0.21(3H,s),0.20(3H,s).
MS(APCI、ESI)m/z:489(M+H)+
上記工程5にて得られた化合物(7-5)(0.080g,0.164mmol)と実施例10-3工程9にて得られた化合物(3-10)(0.095g、0.163mmol)を、実施例10-3工程10と同様に反応させ、目的物(7-6)(0.160g,98%)を得た。
1H-NMR(DMSO-D6)δ:7.44-7.42(3H,m),7.12-7.10(2H,m),7.05-7.03(1H,m),6.92-6.90(2H,m),6.61-6.59(1H,m),5.87-5.81(3H,m),5.10-5.07(4H,m),4.66-4.55(3H,m),4.43-4.39(2H,m),4.21-3.94(5H,m),3.83(3H,s),3.81(3H,s),3.76(3H,s),3.65-3.62(1H,m),3.56-3.54(1H,m),3.42-3.39(1H,m),3.22-3.14(2H,m),2.77-2.73(1H,m),2.42-2.33(1H,m),1.81-1.79(4H,m),1.55-1.44(3H,m),0.82(9H,s),0.72-0.53(4H,m),0.19(3H,s),0.17(3H,s).
MS(APCI、ESI)m/z:993(M+H)+
上記工程6にて得られた化合物(7-6)(160mg,0.161mmol)を、実施例10-3工程11と同様に反応させ、目的物(7-7)(141mg,定量的)を得た。
1H-NMR(DMSO-D6)δ:7.44-7.42(3H,m),7.08-7.06(3H,m),6.92-6.90(2H,m),6.82-6.79(1H,m),6.56-6.54(1H,m),5.77-5.74(3H,m),5.09(4H,s),4.58-4.55(3H,m),4.43-4.41(2H,m),4.16-4.01(5H,m),3.81-3.81(6H,m),3.76(3H,s),3.64(1H,s),3.56-3.53(1H,m),3.42-3.38(1H,m),3.25-3.13(2H,m),2.74-2.70(1H,m),2.37-2.34(1H,m),1.82-1.79(4H,m),1.59-1.56(3H,m),0.66-0.62(4H,m).
MS(APCI、ESI)m/z:879(M+H)+
上記工程7にて得られた化合物(7-7)(141mg,0.161mmol)を、実施例10-3工程12と同様に反応させ、目的物(7-8)(109.8mg,99%)を得た。
1H-NMR(DMSO-D6)δ:7.92-7.91(1H,m),7.45(1H,s),7.39-7.37(2H,m),7.33(1H,s),7.29(1H,s),6.92-6.89(2H,m),6.85(1H,s),6.56-6.54(1H,m),6.31(1H,s),4.19-4.12(2H,m),4.05-3.99(1H,m),3.95-3.93(2H,m),3.82-3.79(4H,m),3.76(3H,s),3.66(3H,s),3.52-3.46(3H,m),3.30-3.21(2H,m),2.78-2.74(1H,m),2.45-2.42(1H,m),2.06-2.05(1H,m),1.89-1.82(4H,m),1.60-1.58(2H,m),0.80-0.63(4H,m).
MS(APCI、ESI)m/z:693(M+H)+
[実施例10-8:薬物2]
実施例6工程1にて得られた化合物(6-2)(6.49g,14.7mmol)のテトラヒドロフラン(147mL)溶液に、水素化ホウ素リチウム(0.642g,29.5mmol)を0℃で加え、室温で2時間撹拌した。反応溶液に1規定塩酸を加え、酢酸エチルで抽出した。得られた有機層を、飽和食塩水で洗浄し、硫酸マグネシウムで乾燥した後、減圧留去した。得られた粗生成物(8-1)(6.94g,定量的)を次工程で使用した。
MS(APCI、ESI)m/z:413(M+H)+
上記工程1にて得られた化合物(8-1)(4.50g,11.0mmol)を、実施例10-1工程8と同様に反応させ、目的物(8-2)(1.94g,43%)を得た。
MS(APCI、ESI)m/z:411(M+H)+
上記工程2にて得られた化合物(8-2)(1.94g,4.73mmol)のテトラヒドロフラン(25mL)、酢酸エチル(25mL)、メタノール(25mL)の混合溶液に、窒素雰囲気下、5%パラジウム炭素(54%水分、1.0g)を加えた後、反応溶液を水素雰囲気下、室温にて22時間撹拌した。反応溶液をセライト濾過した後、濾液を減圧留去した。得られた残渣を、シリカゲルカラムクロマトグラフィー[ヘキサン:酢酸エチル=80:20(v/v)~0:100(v/v)]にて精製し、目的物(8-3)(1.20g,93%)を得た。
1H-NMR(CDCl3)δ:7.55(1H,s),6.16(1H,s),5.86(1H,s),4.08-4.02(2H,m),3.86(3H,s),3.72-3.69(1H,m),3.57-3.37(3H,m),2.04-2.01(1H,m),1.78-1.75(1H,m),0.79-0.53(4H,m).
MS(APCI、ESI)m/z:275(M+H)+
実施例10-7工程5にて得られた化合物(7-5)(0.300g,0.614mmol)を、実施例10-3工程2と同様に反応させ、目的物(8-4)(0.388g,99%)を得た。
1H-NMR(CDCl3)δ:7.24(1H,s),6.60(1H,s),6.02-5.98(1H,m),5.80-5.75(1H,m),5.11-5.06(2H,m),4.68-4.64(1H,m),4.40-4.38(1H,m),4.02-3.98(2H,m),3.92(3H,s),3.72-3.69(1H,m),3.54-3.52(1H,m),3.46-3.41(2H,m),3.29-3.26(1H,m),2.38-2.34(1H,m),1.94-1.87(4H,m),1.65-1.62(2H,m),1.55-1.55(1H,m),0.86(9H,s),0.75-0.67(4H,m),0.24-0.22(6H,m).
MS(APCI、ESI)m/z:639[81Br,(M+H)+],637[79Br,(M+H)+].
上記工程4にて得られた化合物(8-4)(0.203g0.318mmol)と上記工程3にて得られた化合物(8-3)(0.131g,0.478mmol)を、実施例10-3工程10と同様に反応させ、目的物(8-5)(0.0880g,33%)を得た。
MS(APCI、ESI)m/z:831(M+H)+
上記工程5にて得られた化合物(8-5)(0.0880g,0.106mmol)を、実施例10-3工程11と同様に反応させ、目的物(8-6)(0.0500g、66%)を得た。
MS(APCI、ESI)m/z:717(M+H)+
上記工程6にて得られた化合物(8-6)(0.0500g、0.0698mmol)を実施例10-3工程12と同様に反応させ、目的物(8-7)(0.0330g,77%)を得た。
1H-NMR(CDCl3)δ:7.80(1H,m),7.58(1H,s),7.52(1H,s),6.81(1H,s),6.05(1H,s),4.17-3.97(5H,m),3.94(3H,s),3.87(1H,m),3.84(3H,s),3.72-3.68(3H,m),3.51-3.45(5H,m),2.54-2.51(1H,m),2.03-1.90(6H,m),1.75-1.68(2H,m),0.66(8H,m).
MS(APCI、ESI)m/z:615(M+H)+
[実施例10-9:薬物3]
実施例10-5工程5にて得られたビスアリルオキシカルボニル体(5-6b)(0.460g,0.508mmol)を実施例10-5工程7と同様に反応させ、目的物(9-1)(0.421g,定量的)を得た。
1H-NMR(DMSO-D6)δ:9.19(2H,s),7.22(2H,s),6.89(2H,s),5.97-5.92(2H,m),5.33(2H,m),5.22(2H,m),4.81(2H,m),4.55(4H,m),4.26(2H,s),3.96(4H,m),3.74(6H,s),3.62(2H,m),3.56(2H,s),3.37(2H,m),3.11(2H,m),1.88-1.78(8H,m),1.56-1.54(2H,m),0.54-0.43(8H,m).
MS(APCI、ESI)m/z:821(M+H)+.
上記工程1にて得られた化合物(9-1)(0.421g,0.513mmol)を、実施例10-5工程8と同様に反応させ、目的物(9-2)(0.326g,78%)を得た。
1H-NMR(DMSO-D6)δ:7.07(2H,s),6.80(2H,s),6.55(2H,m),5.84-5.81(2H,m),5.75(2H,m),5.09-5.05(4H,m),4.62(2H,mz),4.40(2H,m),3.98(4H,m),3.81(6H,s),3.54(2H,m),3.43-3.37(2H,m),3.14(2H,m),2.35(2H,m),1.81-1.79(4H,m),1.59-1.56(4H,m),0.70-0.59(8H,m). MS(APCI、ESI)m/z:817(M+H)+.
上記工程2にて得られた化合物(9-2)(0.326g,0.399mmol)を、実施例10-3工程12と同様に反応させ、目的物(9-3)(0.208g,85%)を得た。
1H-NMR(DMSO-D6)δ:7.91(2H,m),7.32(2H,s),6.84(2H,s),4.11(2H,m),4.06(2H,m),3.82(6H,s),3.51-3.31(6H,m),2.43(2H,m),2.05(2H,m),1.82-1.80(4H,m),1.60-1.58(2H,m),0.79-0.77(2H,m),0.68-0.64(6H,m).MS(APCI、ESI)m/z:613(M+H)+.
[実施例10-10:薬物4]
実施例10-3工程1で得られた化合物(3-2)(5.00g,9.66mmol)を実施例10-3工程3と同様に反応させ目的物(10-1)(3.95g,100%)を得た。MS(APCI,ESI)m/z:409(M+H)+
上記工程1で得られた化合物(10-1)(3.95g,9.67mmol)のジクロロメタン(97mL)溶液に、イミダゾール(1.65g,24.2mmol)、トリイソプロピルシリルクロリド(2.46mL,11.6mmol)とジメチルホルムアミド(5mL)を加え、室温で21時間攪拌した。反応溶液に水を加え、クロロホルムで抽出し、得られた有機層を水で洗浄し、減圧留去した。得られた残渣をシリカゲルカラムクロマトグラフィー[ヘキサン:酢酸エチル=100:0(v/v)~20:80(v/v)]にて精製し、目的物(10-2)(4.78g,87%)を得た。
MS(APCI,ESI)m/z:565(M+H)+
上記工程2にて得られた化合物(10-2)(4.78g,8.43mmol)を、実施例10-3工程4と同様に反応させ、目的物(10-3)(2.36g,50%)を得た。MS(APCI,ESI)m/z:563(M+H)+
上記工程3にて得られた化合物(10-3)(1.53g,2,72mmol)を実施例10-3工程5と同様に反応させ、目的化合物(10-4)(1.27g,69%)を得た。
1H-NMR(CDCl3)δ:7.31(2H,s),7.15(1H,m),5.52(1H,m),4.65(1H,m),4.57(1H,m),3.95-3.89(1H,m),3.87(3H,s),3.75-3.58(2H,m),3.18-3.14(1H,m),1.33-1.25(3H,m),1.10(18H,m),1.00-0.96(2H,m),0.03(9H,s).
上記工程4で得られた化合物(10-4)(0.519g,0.747mmol)を、実施例10-3工程6と同様に反応させ、目的化合物(10-5)(0.511g,定量的)を得た。
1H-NMR(CDCl3)δ:7.41-7.31(5H,m),6.91-6.85(2H,m),5.52(1H,m),4.64(1H,m),4.57(1H,m),3.97-3.90(1H,m),3.88(3H,s),3.83(3H,s),3.75-3.56(2H,m),3.19-3.09(1H,m),1.36-1.23(3H,m),1.11(18H,m),1.02-0.97(2H,m),0.03(9H,s).
MS (APCI,ESI)m/z:653[(M+H)+]
上記工程5で得られた化合物(10-5)(0.178g,0.272mmol)を、実施例10-3工程7と同様に反応させ、目的化合物(10-6)(0.094g,68%)を得た。
1H-NMR(CDCl3)δ:7.87(1H,m),7.51(1H,s),7.41-7.39(1H,m),7.36-7.33(2H,m),6.93-6.89(2H,m),6.86(1H,s),4.44-4.38(1H,m),3.90(3H,s),3.83(3H,s),3.61-3.53(1H,m),3.41-3.34(1H,m),1.33-1.25(3H,m),1.11-1.06(18H,m).
MS (APCI,ESI)m/z:507[(M+H)+]
上記工程6で得られた化合物(10-6)(0.063g,0.124mmol)を用いて、実施例10-3工程8と同様に反応させ、目的化合物(10-7)(0.046g,72%)を得た。
1H-NMR(CDCl3)δ:7.53-7.48(2H,m),7.33-7.29(2H,m),6.90-6.86(2H,m),6.13-6.11(1H,m),4.36-4.29(1H,m),4.11(1H,s),3.82(3H,s),3.79(3H,s),3.59-3.50(2H,m),3.40-3.31(1H,m),2.78-2.68(1H,m),1.31-1.20(3H,m),1.13-1.02(18H,m). MS(APCI,ESI)m/z:509[(M+H)+]
上記工程7で得られた化合物(10-7)(0.046g,0.090mmol)を用いて、実施例10-3工程9と同様に反応させ、目的化合物(10-8)(0.03g,56%)を得た。1H-NMR(CDCl3)δ:7.39-7.36(1H,m),7.31-7.28(2H,m),7.22(1H,s),6.90-6.86(3H,m),6.75-6.72(1H,m),5.82-5.69(1H,m),5.18-5.08(2H,m),4.59-4.52(1H,m),4.48-4.39(1H,m),4.39-4.29(1H,m),4.23-4.12(1H,m),3.86(3H,s),3.82(3H,s),3.64-3.58(1H,m),3.32-3.25(1H,m),2.73-2.65(1H,m),1.30-1.20(2H,m),1.12-1.06(18H,m).
MS(APCI,ESI)m/z:593[(M+H)+]
上記工程8で得られた化合物(10-8)(0.030g,0.050mmol)を、実施例10-1工程10と同様に反応させ、目的化合物(10-9)(0.015g,0.034mmol)を得た。
1H-NMR(CDCl3)δ:7.39-7.25(4H,m),6.92-6.78(3H,m),6.03-5.92(1H,m),5.86-5.68(1H,m),5.20-5.07(2H,m),4.66-4.57(1H,m),4.52-4.40(1H,m),4.40-4.27(1H,m),4.27-4.16(1H,m),3.95(3H,s),3.82(3H,s),3.66-3.59(1H,m),3.32-3.21(1H,m),2.74-2.64(1H,m).
MS(APCI,ESI)m/z:437[(M+H)+]
実施例7工程5で得られた化合物(7-5)(0.131g,0.268mmol)を実施例10-4工程1と同様に反応させ、目的物(10-10)(0.086g,52%)を得た。
1H-NMR(CDCl3)δ:7.24(1H,s),6.65(1H,s),6.02(1H,m),5.87-5.71(1H,m),5.15-5.04(2H,m),4.72-4.62(1H,m),4.44-4.32(1H,m),4.23-4.07(3H,m),3.92(3H,s),3.77-3.47(4H,m),3.28(1H,m),2.37(3H,m),1.57-1.52(1H,m),0.86(9H,s),0.82-0.57(4H,m),0.21(6H,m).
MS(APCI,ESI)m/z:611[81Br,(M+H)+],609[79Br,(M+H)+]
上記工程10で得られる化合物(10-10)(0.015g,0.034mmol)と、上記工程9で得られる化合物(10-9)(0.030g,0.048mmol)を用いて、実施例10-3工程10と同様に反応させ、目的化合物(10-11)(0.032g,96%)を得た。
MS(APCI,ESI)m/z:965[(M+H)+]
上記工程11で得られた化合物(10-11)(0.031g,0.032mmol)を実施例10-3工程11と同様に反応させ、目的物(10-12)(0.026g,95%)を得た。
MS(APCI,ESI)m/z:851[(M+H)+]
上記工程12で得られた化合物(10-12)(0.026g,0.030mmol)を実施例10-3工程12と同様に反応させ、目的物(10-13)(0.018g,88%)を得た。
1H-NMR(CDCl3)δ:7.80(1H,m),7.54-7.51(3H,m),7.33-7.29(2H,m),6.91-6.85(3H,m),6.14(1H,s),4.35-4.17(6H,m),3.95(3H,s),3.85(3H,s),3.82(3H,s),3.76-3.25(5H,m),2.79-2.69(1H,m),2.52(1H,m),2.45-2.35(1H,m),2.03-1.96(1H,m),1.28-1.23(2H,m),0.78-0.69(4H,m).
MS(APCI,ESI)m/z:665[(M+H)+]
[実施例11:[N3-PEG(3)]-MSG1-Ox]
[N3-PEG(3)]-MSG1合成
工程1:(MSG1-)Asn
市販品であるmonosialo-Asn free (1S2G/1G2S-10NC-Asn 、(株)糖鎖工学研究所製)(「(MSG-)Asn」と呼ぶ)(500mg)を以下の条件で逆相HPLC分離精製し、1st main peakとして溶出される(MSG1-)Asn(保持時間 15~19 min 付近)と2nd main peakとして溶出される(MSG2-)Asn(保持時間 21~26 min 付近)に分離した。0.1%ぎ酸水溶液を溶離液として使用し、装置にはELS-PDAトリガー分取システム(日本分光株式会社製)を使用し、カラムにはInertsil ODS-3(10um、 30Φx250mm、GLサイエンス社製)を使用し、流速を30mL/minとした。溶出中にUV検出(210nm)された最初のピークに帰属するフラクションを一つにまとめ、凍結乾燥して、目的物(238mg)を得た。
上記工程1で得られた化合物(229mg)を200mMりん酸緩衝溶液(pH6.25)(1145μL)に溶解させ、EndoM(東京化成工業(株)製、1U/mL))水溶液(100μL)を加え、35℃で6日間インキュベートした。反応終了後、反応液をVIVASPIN 15R (Hydrosart膜、30K,6,000xG)を用いて限外ろ過し、得られた通過液を逆相HPLC分離精製した。0.1%トリフルオロ酢酸水溶液を溶離液として使用し、装置にはELS-PDA トリガー分取システム(日本分光株式会社製)、カラムにはInertsil ODS-3(GLサイエンス社製)を使用した。溶出中にUV検出(210nm)された目的物を含むフラクションを一つにまとめ、凍結乾燥し、目的物(117mg)を得た。
5mlサンプリングチューブ((株)イナ・オプティカ)に、11-アジド-3,6,9-トリオキサウンデカン-1-アミン(0.108mL,0.541mmol)と上記工程2で得られたMSG1(117mg,0.068mmol)の水溶液(1.2mL)を加え、1時間撹拌した後に、凍結乾燥した。凍結乾燥後の5mlサンプリングチューブに、O-(7-アザベンゾトリアゾール-1-イル)-N,N,N’,N’-テトラメチルウロニウムヘキサフルオロホスファート(103mg,0.27mmol)のN,N-ジメチルホルムアミド溶液(1.2mL)とジイソプロピルエチルアミン(0.046mL,0.27mmol)を加え、37℃で3時間撹拌した。反応終了後、あらかじめジエチルエーテル(20ml)を加えた遠沈管(50ml)に反応液を移した。小型遠心機(日立工機、CF16RX)を利用して、固形物を沈殿させ、上澄みを取り除いた。さらにジエチルエーテル(10ml)を加えて、遠心分離操作後、デカンテーションを行った。続いて、アセトニトリル(10mL)を加え、遠心分離後、デカンテーションする操作を二回繰り返した後、減圧下乾燥し、粗生成物を得た。得られた固形物を上記工程2と同様の条件にて逆相HPLC精製を行い、目的物(94.2mg)を得た。
5mLサンプリングチューブ((株)イナ・オプティカ製)に、上記工程3で合成した化合物(100mg)、2-クロロ-1,3-ジメチル-1H-ベンズイミダゾール-3-イウム-クロライド(伏見製薬所製、56mg,0.257mmol)の水溶液(520μl)を加えた。氷冷後の反応液にりん酸三カリウム(165mg, 0.78mmol)の水溶液(520μl)を加え、氷冷下で3時間撹拌した。得られた反応液を、アミコンウルトラ(ウルトラセル30K、 Merck Millipore製)を用いて限外ろ過し、固形物を除去した。その通過液を、ゲルろ過クロマトグラフィーにて精製した。装置にはPurif-Rp2(昭光サイエンティフィック製)を使用し、カラムにはHiPrep 26/10 Desalting(GEヘルスケア製)を使用し、移動相に0.03%- NH3水溶液を使用し、流速を10mL/min、分画容量を10mLとした。溶出中にUV検出(220nm)された目的物を含むフラクションを一つにまとめ、1N水酸化ナトリウム水溶液(104μl,0.104mmol)を加えて凍結乾燥し、目的物(84mg)を得た。
工程1:(Fucα1,6)GlcNAc-H01L02抗体の調製
H01L02抗体溶液ca.21.1mg/mL(50mMりん酸緩衝液(pH6.0))(4.07mL)に、7.7mg/mL野生型EndoS溶液(PBS)を0.233mL加え、37℃で4時間インキュベートした。反応の進行具合をExperion電気泳動ステーション(BIO-RAD製)を用いて確認した。反応終了後、以下の方法に従い、アフィニティークロマトグラフィーによる精製とハイドロキシアパタイトカラムによる精製を行った。
精製装置:AKTA avant(GE ヘルスケア製)
カラム:HiTrap rProtein A FF (5mL)(GE ヘルスケア製)
流速:5mL/min(チャージ時は1.25mL/min)
上記で得た反応液を複数回に分けて精製した。カラムへの結合時は、反応液をカラム上部へ添加し、結合バッファー(20mMりん酸緩衝液(pH6.0))を1.25mL/minで4CV(Column Volume)流し、更に5mL/minで5CV流した。中間洗浄時は、洗浄溶液(20mMりん酸緩衝液(pH7.0)、0.5M 塩化ナトリウム溶液)を15CV流した。溶出時は、溶出バッファー(ImmunoPure IgG Eution buffer、PIERCE製)を6CV流した。溶出液を1M トリス緩衝液(pH9.0)で直ちに中和した。目的物を含むフラクションを共通操作Cを用いて、5mMりん酸緩衝液50mM2-モルホリノエタンスルホン酸(MES)溶液(pH6.8)への緩衝液交換を行った。
精製装置:AKTA avant(GE ヘルスケア製)
カラム:Bio-Scale Mini CHT Type Iカートリッジ(5mL)(BIO-RAD製)
流速:5mL/min(チャージ時は1.25mL/min)
上記(1)で得られた溶液をカラムの上部へ添加し、A液(5mM りん酸緩衝液、50mM2-モルホリノエタンスルホン酸(MES)溶液(pH6.8))を1.25mL/minで4CV流し、更に5mL/minで3CV流した。その後、A液とB液(5mMりん酸緩衝液50mM2-モルホリノエタンスルホン酸(MES)溶液(pH6.8)、2M塩化ナトリウム溶液)を用いて、溶出した。溶出条件は、A液:B液=100:0~0:100(15CV)である。さらに、洗浄溶液(500mMりん酸緩衝液(pH6.5))を5CV流した。
上記工程1にて得られた11.4mg/mL(Fucα1,6)GlcNAc-H01L02抗体溶液(50mM りん酸緩衝液(pH6.0))(5.00mL)に、実施例11工程4で合成した糖鎖(9.00mg)の50mMりん酸緩衝液(pH6.0)溶液(0.180mL)、5.10mg/mLのEndoS D233Q/Q303L溶液(PBS)(0.230mL)を加えて、30℃で3時間インキュベートした。反応の進行具合をExperion電気泳動ステーション(BIO-RAD製)を用いて確認した。反応終了後、上記工程1と同様にアフィニティークロマトグラフィーによる精製とハイドロキシアパタイトクロマトグラフィーによる精製を行った後、目的物を含むフラクションを共通操作Cを用いてりん酸緩衝生理食塩水(pH6.0)へ緩衝液交換を行い、9.91mg/mLのH01L02抗体[MSG1-N3]2溶液(りん酸緩衝生理食塩水(pH6.0))(4.00mL)を得た。
H01L02A抗体溶液ca.21.6mg/mL(50mリン酸緩衝溶液(pH6.0))(1.85mL)を用いて、上記実施例12工程1と同様の操作を行い、14.6mg/mLの(Fucα1,6)GlcNAc-H01L02A抗体溶液(50mMりん酸緩衝液(pH6.0))(2.0mL)を得た。
上記工程1で得られた14.6mg/mL(Fucα1,6)GlcNAc-H01L02A抗体溶液(50mMりん酸緩衝液(pH6.0))(2.0mL)を用いて、実施例12工程2と同様の操作を行うことによって、10.0mg/mLのH01L02A抗体-[MSG1-N3]2溶液(酢酸緩衝液(pH5.5,含ソルビトール))(2.5mL)を得た。
H31L02A抗体溶液ca.23.2mg/mL(50mリン酸緩衝溶液(pH6.0))(3.45mL)を用いて、上記実施例12工程1と同様の操作を行い、8.43mg/mLの(Fucα1,6)GlcNAc-H31L02A抗体溶液(50mM りん酸緩衝液(pH6.0))(6.1mL)を得た。
上記工程1で得られた8.43mg/mL(Fucα1,6)GlcNAc-H31L02A抗体溶液(50mMりん酸緩衝液(pH6.0))(5.00mL)を用いて、実施例12工程2と同様の操作を行うことによって、6.52mg/mLのH31L02A抗体-[MSG1-N3]2溶液(リン酸緩衝生理食塩水(pH6.0))(4.00mL)を得た。
H11L02A抗体溶液ca.24.2mg/mL(50mリン酸緩衝溶液(pH6.0))(3.0mL)を用いて、上記実施例12工程1と同様の操作を行い、20.42mg/mLの(Fucα1,6)GlcNAc-H11L02A抗体溶液(50mM りん酸緩衝液(pH6.0))(2.7mL)を得た。
上記工程1で得られた20.39mg/mL(Fucα1,6)GlcNAc-H11L02A抗体溶液(50mM りん酸緩衝液(pH6.0))(1.55mL)を用いて、上記実施例12工程2と同様の操作を行うことによって、10.26mg/mLのH11L02A抗体-[MSG1-N3]2溶液(酢酸緩衝液(pH5.5,含ソルビトール))(2.6mL)を得た。
抗LPS抗体溶液ca.17mg/mL(25mMヒスチジン溶液(pH6.0)、5%ソルビトール溶液)(6.6mL)を用いて、実施例12工程1と同様の操作を行い、21.03mg/mLの(Fucα1,6)GlcNAc-抗LPS抗体溶液(50mM りん酸緩衝液(pH6.0))(5.4mL)を得た。
上記工程1で得られた21.03mg/mL(Fucα1,6)GlcNAc-抗LPS抗体溶液(50mMりん酸緩衝液(pH6.0))(5.4mL)を用いて、実施例12工程2と同様の操作を行うことによって、9.89mg/mLの抗LPS抗体-[MSG1-N3]2溶液(リン酸緩衝生理食塩水(pH6.0))(7.9mL)を得た。
実施例17に記載のADCは、下記の反応式に示すように実施例12の工程2で得られた抗体と実施例10-3工程13で得られた薬物リンカー(3-14)をコンジュゲーションすることによって合成した。式中、Rは実施例で用いられた薬物リンカーを示す。
工程1:抗体と薬物リンカーのコンジュゲーション
実施例12工程2にて得られた抗体のリン酸緩衝生理食塩水(pH6.0)溶液(6.76mg/mL,1.50mL)に、室温にて1,2-プロパンジオール(1.42mL)、実施例10-3工程13にて得られた化合物(3-14)の10mMジメチルスルホキシド溶液(0.0836mL;抗体1分子に対して12当量)を加え、チューブローテーター(MTR-103、アズワン株式会社)を用いて、室温にて48時間反応させた。
精製操作:上記溶液を共通操作Dを用いて精製を行い、目的の化合物を有する溶液を6.00mL得た。
[実施例18 ADC2]
実施例18に記載のADCは、下記の反応式に示すように実施例13工程2で得られた抗体と実施例10-4工程12で得られた薬物リンカー(4-12)をコンジュゲーションすることによって合成した。式中、Rは実施例で用いられた薬物リンカーを示す。
工程1:抗体と薬物リンカーのコンジュゲーション
実施例13工程2にて得られた抗体の10mM 酢酸緩衝液, 5% ソルビトール(pH5.5)溶液(10.0mg/mL,100μL)に、室温にて1,2-プロパンジオール(25μL)、実施例10-4工程12にて得られた化合物(4-12)の10mMジメチルスルホキシド溶液(8μL;抗体1分子に対して12当量)と1,2-プロパンジオール(67μL)の混合溶液を加え、チューブローテーター(MTR-103、アズワン株式会社)を用いて、室温にて48時間反応させた。
精製操作:上記溶液を共通操作Dを用いて精製を行い、目的の化合物を有する溶液を1.2mL得た。
[実施例19:ADC3]
実施例19に記載のADCは、実施例13工程2で得られた抗体と実施例10-5工程10で得られた薬物リンカー(5-11)をコンジュゲーションすることによって合成した。
工程1:抗体と薬物リンカーのコンジュゲーション
実施例13工程2にて得られた抗体の10mM 酢酸緩衝液,5% ソルビトール(pH5.5)溶液(10.0mg/mL,100μL)に、室温にて1,2-プロパンジオール(25μL)、実施例10-5工程10にて得られた化合物(5-11)の10mMジメチルスルホキシド溶液(8μL;抗体1分子に対して12当量)と1,2-プロパンジオール(67μL)の混合溶液を加え、チューブローテーター(MTR-103、アズワン株式会社)を用いて、室温にて48時間反応させた。
精製操作:上記溶液を共通操作Dを用いて精製を行い、目的の化合物を有する溶液を1.2mL得た。
[実施例20:ADC4]
実施例20に記載のADCは、実施例13の工程2で得られた抗体と実施例10-6工程12で得られた薬物リンカー(6-13)をコンジュゲーションすることによって合成した。
工程1:抗体と薬物リンカーのコンジュゲーション
実施例13工程2にて得られた抗体の10mM 酢酸緩衝液,5% ソルビトール(pH5.5)溶液(10.0mg/mL,100μL)に、室温にて1,2-プロパンジオール(25μL)、実施例10-6工程12にて得られた化合物(6-13)の10mMジメチルスルホキシド溶液(8μL;抗体1分子に対して12当量)と1,2-プロパンジオール(67μL)の混合溶液を加え、チューブローテーター(MTR-103、アズワン株式会社)を用いて、室温にて48時間反応させた。
精製操作:上記溶液を共通操作Dを用いて精製を行い、目的の化合物を有する溶液を1.2mL得た。
[実施例21:ADC5]
実施例21に記載のADCは、実施例13工程2で得られた抗体と実施例10-3工程13で得られた薬物リンカー(3-14)をコンジュゲーションすることによって合成した。
工程1:抗体と薬物リンカーのコンジュゲーション
実施例13工程2にて得られた抗体の10mM 酢酸緩衝液,5% ソルビトール(pH5.5)溶液(10.0mg/mL,1.70mL)に、室温にて1,2-プロパンジオール(0.850mL)、実施例10-3工程13にて得られた化合物(3-14)の10mMジメチルスルホキシド溶液(0.141mL;抗体1分子に対して12当量)と1,2-プロパンジオール(0.710mL)の混合溶液を加え、チューブローテーター(MTR-103、アズワン株式会社)を用いて、室温にて48時間反応させた。
精製操作:上記溶液を共通操作Dを用いて精製を行い、目的の化合物を有する溶液を10.5mL得た。
[実施例22:ADC6]
実施例22に記載のADCは、下記の反応式に示すように実施例14の工程2で得られた抗体と実施例10-3工程13で得られた薬物リンカー(3-14)をコンジュゲーションすることによって合成した。式中、Rは実施例で用いられた薬物リンカーを示す。
工程1:抗体と薬物リンカーのコンジュゲーション
実施例14工程2にて得られた抗体のリン酸緩衝生理食塩水(pH6.0)溶液(10.1mg/mL,0.400mL)に、室温にて1,2-プロパンジオール(0.367mL)、実施例10-3工程13にて得られた化合物(3-14)の10mMジメチルスルホキシド溶液(0.0333mL;抗体1分子に対して12当量)を加え、チューブローテーター(MTR-103、アズワン株式会社)を用いて、室温にて48時間反応させた。
精製操作:上記溶液を共通操作Dを用いて精製を行い、目的の化合物を有する溶液を3.50mL得た。
実施例23~26に記載のADCは、下記の反応式に示すように実施例15の工程2で得られた抗体と実施例10-3~10-6で得られた薬物リンカーをコンジュゲーションすることによって合成した。式中、Rは各実施例で用いられた薬物リンカーによって異なる。
工程1:抗体と薬物リンカーのコンジュゲーション
実施例15工程2にて得られた抗体の10mM 酢酸緩衝液,5% ソルビトール(pH5.5)溶液(10.54mg/mL,0.4mL)に、室温にて1,2-プロパンジオール(0.100mL)、実施例10-3工程13にて得られた化合物(3-14)の10mMジメチルスルホキシド溶液(0.035mL;抗体1分子に対して12当量)と1,2-プロパンジオール(0.266mL)の混合溶液を加え、チューブローテーター(MTR-103、アズワン株式会社)を用いて、室温にて48時間反応させた。
精製操作:上記溶液を共通操作Dを用いて精製を行い、目的の化合物を有する溶液を2.5mL得た。
[実施例24:ADC8]
工程1:抗体と薬物リンカーのコンジュゲーション
実施例15工程2にて得られた抗体の10mM 酢酸緩衝液, 5% ソルビトール(pH5.5)溶液(2.8mg/mL,0.3mL)に、室温にて1,2-プロパンジオール(75μL)、実施例10-4工程12にて得られた化合物(4-12)の10mMジメチルスルホキシド溶液(7μL;抗体1分子に対して12当量)と1,2-プロパンジオール(218μL)の混合溶液を加え、チューブローテーター(MTR-103、アズワン株式会社)を用いて、室温にて48時間反応させた。
精製操作:上記溶液を共通操作Dを用いて精製を行い、目的の化合物を有する溶液を2.5mL得た。
[実施例25:ADC9]
工程1:抗体と薬物リンカーのコンジュゲーション
実施例15工程2にて得られた抗体の10mM 酢酸緩衝液, 5% ソルビトール(pH5.5)溶液(2.8mg/mL,300μL)に、室温にて1,2-プロパンジオール(75μL)、実施例10-5工程10にて得られた化合物(5-11)の10mMジメチルスルホキシド溶液(7μL;抗体1分子に対して12当量)と1,2-プロパンジオール(218μL)の混合溶液を加え、チューブローテーター(MTR-103、アズワン株式会社)を用いて、室温にて48時間反応させた。
精製操作:上記溶液を共通操作Dを用いて精製を行い、目的の化合物を有する溶液を2.5mL得た。
[実施例26:ADC10]
工程1:抗体と薬物リンカーのコンジュゲーション
実施例15工程2にて得られた抗体の10mM 酢酸緩衝液,5% ソルビトール(pH5.5)溶液(2.8mg/mL,300μL)に、室温にて1,2-プロパンジオール(75μL)、実施例10-6工程12にて得られた化合物(6-13)の10mMジメチルスルホキシド溶液溶液(7μL;抗体1分子に対して12当量)と1,2-プロパンジオール(218μL)の混合溶液を加え、チューブローテーター(MTR-103、アズワン株式会社)を用いて、室温にて48時間反応させた。
精製操作:上記溶液を共通操作Dを用いて精製を行い、目的の化合物を有する溶液を2.5mL得た。
実施例27に記載のADCは、下記の反応式に示すように実施例16の工程2で得られた抗体と実施例10-3工程13で得られた薬物リンカー(3-14)をコンジュゲーションすることによって合成した。式中、Rは実施例で用いられた薬物リンカーを示す。
工程1:抗体と薬物リンカーのコンジュゲーション
実施例16工程2にて得られた抗体のリン酸緩衝生理食塩水(pH6.0)溶液(9.89mg/mL,0.40mL)に、室温にて1,2-プロパンジオール(0.367mL)、実施例10-3工程13にて得られた化合物(3-14)を10mM含むジメチルスルホキシド溶液(0.0328mL;抗体1分子に対して12当量)を加え、チューブローテーター(MTR-103、アズワン株式会社)を用いて、室温にて2日間反応させた。
精製操作:上記溶液を共通操作Dを用いて精製を行い、目的の化合物を有する溶液を2.50mL得た。
[実施例28] 実施例10-1に示される化合物(1-11)の立体配置解析 [実施例10-1:中間体1]に記載の化合物(1-11)についてselective 1D ROESYスペクトルで得られた相関(下図)より、11’位の絶対立体配置の解析を行った。1’α-Hと11’-Hとの間、3’α-Hと11’-Hとの間、及び1’β-Hと3’β-Hとの間に相関が認められることから、11’位の絶対立体配置はS配置であることが分かった。
Selective 1D ROESYスペクトル相関測定時に使用した1H-NMR
1HNMR(500MHz,CDCl3,27℃)δ:8.76(1H,s),7.43(2H,brd),7.20(1H,s),7.08(2H,d,J=8.3Hz),7.00(1H,br),6.66(1H,s),6.44(1H,s),6.00(1H,H11’,d,J11’,11’a=9.2Hz),5.89(1H,m),5.53(1H,brd),5.30(1H,d,J=17.2Hz),5.20(1H,d,J=10.3Hz),5.15(1H,d,JABq=12.5Hz),4.85(1H,d,JABq=12.5Hz),4.66(1H,m),4.604.52(2H,m),4.07(1H,m),3.84(3H,s),3.71(1H,H―3’β,d,Jgem=11.7Hz),3.53(1H,H-11’a,m),3.26(1H,H-3’α,d,Jgem=11.7Hz),2.35(1H,H-1’β,dd,J1’ β,11’a=8.30Hz,Jgem=13.1Hz),2.14(1H,m),1.54(1H,H-1’α,d,Jgem=13.1Hz),1.41(3H,d,J=6.90Hz),0.95(3H,d,J=6.80Hz),0.92(3H,d,J=6.80Hz),0.81(9H,s),0.80-0.70(1H,m),0.70-0.59(3H,m),0.2-0.06(6H,m)
従って、[実施例10-1:中間体1]に記載の化合物(1-9)、(1-10)及び(1-11)並びに化合物(1-11)を用いて合成された薬物リンカー1、2及び4並びにこれらの合成中間体11’位の絶対立体配置はS配置であることが分かった。また、同様の合成手法で得られる薬物リンカー3およびその中間体11’位の絶対立体配置もS配置と決定した。
(1-10):N-[(プロプ-2-エン-1-イルオキシ)カルボニル]-L-バリル-N-{4-[({[(11’S,11a’S)-11’-{[tert-ブチル(ジメチル)シリル]オキシ}-7’-メトキシ-5’-オキソ-8’-{[トリ(プロパン-2-イル)シリル]オキシ}-11’,11a’-ジヒドロ-1’H-スピロ[シクロプロパン-1,2’-ピロロ[2,1-c][1,4]ベンゾジアゼピン]-10’(5’H)-イル]カルボニル}オキシ)メチル]フェニル}-L-アラニンアミド
(1-11):N-[(プロプ-2-エン-1-イルオキシ)カルボニル]-L-バリル-N-{4-[({[(11’S,11a’S)-11’-{[tert-ブチル(ジメチル)シリル]オキシ}-8’-ヒドロキシ-7’-メトキシ-5’-オキソ-11’,11a’-ジヒドロ-1’H-スピロ[シクロプロパン-1,2’-ピロロ[2,1-c][1,4]ベンゾジアゼピン]-10’(5’H)-イル]カルボニル}オキシ)メチル]フェニル}-L-アラニンアミド
[実施例10-3:薬物リンカー1]に示される工程1~13は、以下のように表される。
(3-12):N-[(プロプ-2-エン-1-イルオキシ)カルボニル]-L-バリル-N-{4-[({[(11’S,11a’S)-11’-ヒドロキシ-7’-メトキシ-8’-{[5-({(11aS)-7-メトキシ-2-(4-メトキシフェニル)-5-オキソ-10-[(プロプ-2-エン-1-イルオキシ)カルボニル]-5,10,11,11a-テトラヒドロ-1H-ピロロ[2,1-c][1,4]ベンゾジアゼピン-8-イル}オキシ)ペンチル]オキシ}-5’-オキソ-11’,11a’-ジヒドロ-1’H-スピロ[シクロプロパン-1,2’-ピロロ[2,1-c][1,4]ベンゾジアゼピン]-10’(5’H)-イル]カルボニル}オキシ)メチル]フェニル}-L-アラニンアミド
(3-13):L-バリル-N-{4-[({[(11’S,11a’S)-11’-ヒドロキシ-7’-メトキシ-8’-[(5-{[(11aS)-7-メトキシ-2-(4-メトキシフェニル)-5-オキソ-5,10,11,11a-テトラヒドロ-1H-ピロロ[2,1-c][1,4]ベンゾジアゼピン-8-イル]オキシ}ペンチル)オキシ]-5’-オキソ-11’,11a’-ジヒドロ-1’H-スピロ[シクロプロパン-1,2’-ピロロ[2,1-c][1,4]ベンゾジアゼピン]-10’(5’H)-イル]カルボニル}オキシ)メチル]フェニル}-L-アラニンアミド(3-13)
(3-14):N-[4-(11,12-ジデヒドロジベンゾ[b,f]アゾシン-5(6H)-イル)-4-オキソブタノイル]グリシルグリシル-L-バリル-N-{4-[({[(11’S,11a’S)-11’-ヒドロキシ-7’-メトキシ-8’-[(5-{[(11aS)-7-メトキシ-2-(4-メトキシフェニル)-5-オキソ-5,10,11,11a-テトラヒドロ-1H-ピロロ[2,1-c][1,4]ベンゾジアゼピン-8-イル]オキシ}ペンチル)オキシ]-5’-オキソ-11’,11a’-ジヒドロ-1’H-スピロ[シクロプロパン-1,2’-ピロロ[2,1-c][1,4]ベンゾジアゼピン]-10’(5’H)-イル]カルボニル}オキシ)メチル]フェニル}-L-アラニンアミド
[実施例10-4:薬物リンカー2]に示される工程1~12は、以下のように表される。
(4-10):N-{[(プロプ-2-エン-1-イル)オキシ]カルボニル}-L-バリル-N-[4-({[(11’S,11’aS)-11’-ヒドロキシ-7’-メトキシ-8’-(3-{[(11aS)-7-メトキシ-2-(4-メトキシフェニル)-5-オキソ-10-{[(プロプ-2-エン-1-イル)オキシ]カルボニル}-5,10,11,11a-テトラヒドロ-1H-ピロロ[2,1-c][1,4]ベンゾジアゼピン-8-イル]オキシ}プロポキシ)-5’-オキソ-11’,11’a-ジヒドロ-1’H,3’H-スピロ[シクロプロパン-1,2’-ピロロ[2,1-c][1,4]ベンゾジアゼピン]-10’(5’H)-カルボニル]オキシ}メチル)フェニル]-L-アラニンアミド
(4-11):L-バリル-N-[4-({[(11’S,11’aS)-11’-ヒドロキシ-7’-メトキシ-8’-(3-{[(11aS)-7-メトキシ-2-(4-メトキシフェニル)-5-オキソ-5,10,11,11a-テトラヒドロ-1H-ピロロ[2,1-c][1,4]ベンゾジアゼピン-8-イル]オキシ}プロポキシ)-5’-オキソ-11’,11’a-ジヒドロ-1’H,3’H-スピロ[シクロプロパン-1,2’-ピロロ[2,1-c][1,4]ベンゾジアゼピン]-10’(5’H)-カルボニル]オキシ}メチル)フェニル]-L-アラニンアミド
(4-12):N-[4-(11,12-ジデヒドロジベンゾ[b,f]アゾシン-5(6H)-イル)-4-オキソブタノイル]グリシルグリシル-L-バリル-N-[4-({[(11’S,11’aS)-11’-ヒドロキシ-7’-メトキシ-8’-(3-{[(11aS)-7-メトキシ-2-(4-メトキシフェニル)-5-オキソ-5,10,11,11a-テトラヒドロ-1H-ピロロ[2,1-c][1,4]ベンゾジアゼピン-8-イル]オキシ}プロポキシ)-5’-オキソ-11’,11’a-ジヒドロ-1’H,3’H-スピロ[シクロプロパン-1,2’-ピロロ[2,1-c][1,4]ベンゾジアゼピン]-10’(5’H)-カルボニル]オキシ}メチル)フェニル]-L-アラニンアミド
[実施例10-5:薬物リンカー3]に示される工程1~10は、以下のように表される。
(5-10):L-バリル-N-{4-[({[(11’S,11a’S)-11’-ヒドロキシ-7’-メトキシ-8’-[(5-{[(11a’S)-7’-メトキシ-5’-オキソ-5’,11a’-ジヒドロ-1’H-スピロ[シクロプロパン-1,2’-ピロロ[2,1-c][1,4]ベンゾジアゼピン]-8’-イル]オキシ}ペンチル)オキシ]-5’-オキソ-11’,11a’-ジヒドロ-1’H-スピロ[シクロプロパン-1,2’-ピロロ[2,1-c][1,4]ベンゾジアゼピン]-10’(5’H)-イル]カルボニル}オキシ)メチル]フェニル}-L-アラニンアミド
(5-11):N-[4-(11,12-ジデヒドロジベンゾ[b,f]アゾシン-5(6H)-イル)-4-オキソブタノイル]グリシルグリシル-L-バリル-N-{4-[({[(11’S,11a’S)-11’-ヒドロキシ-7’-メトキシ-8’-[(5-{[(11a’S)-7’-メトキシ-5’-オキソ-5’,11a’-ジヒドロ-1’H-スピロ[シクロプロパン-1,2’-ピロロ[2,1-c][1,4]ベンゾジアゼピン]-8’-イル]オキシ}ペンチル)オキシ]-5’-オキソ-11’,11a’-ジヒドロ-1’H-スピロ[シクロプロパン-1,2’-ピロロ[2,1-c][1,4]ベンゾジアゼピン]-10’(5’H)-イル]カルボニル}オキシ)メチル]フェニル}-L-アラニンアミド
[実施例10-6:薬物リンカー4]に示される工程1~12は、以下のように表される。
(6-11):N-[(プロプ-2-エン-1-イルオキシ)カルボニル]-L-バリル-N-{4-[({[(11’S,11a’S)-11’-ヒドロキシ-7’-メトキシ-8’-{[5-({(11a’S)-7’-メトキシ-5’-オキソ-10’-[(プロプ-2-エン-1-イルオキシ)カルボニル]-5’,10’,11’,11a’-テトラヒドロ-1’H-スピロ[シクロプロパン-1,2’-ピロロ[2,1-c][1,4]ベンゾジアゼピン]-8’-イル}オキシ)ペンチル]オキシ}-5’-オキソ-11’,11a’-ジヒドロ-1’H-スピロ[シクロプロパン-1,2’-ピロロ[2,1-c][1,4]ベンゾジアゼピン]-10’(5’H)-イル]カルボニル}オキシ)メチル]フェニル}-L-アラニンアミド
(6-12):L-バリル-N-{4-[({[(11’S,11a’S)-11’-ヒドロキシ-7’-メトキシ-8’-[(5-{[(11a’S)-7’-メトキシ-5’-オキソ-5’,10’,11’,11a’-テトラヒドロ-1’H-スピロ[シクロプロパン-1,2’-ピロロ[2,1-c][1,4]ベンゾジアゼピン]-8’-イル]オキシ}ペンチル)オキシ]-5’-オキソ-11’,11a’-ジヒドロ-1’H-スピロ[シクロプロパン-1,2’-ピロロ[2,1-c][1,4]ベンゾジアゼピン]-10’(5’H)-イル]カルボニル}オキシ)メチル]フェニル}-L-アラニンアミド
(6-13):N-[4-(11,12-ジデヒドロジベンゾ[b,f]アゾシン-5(6H)-イル)-4-オキソブタノイル]グリシルグリシル-L-バリル-N-{4-[({[(11’S,11a’S)-11’-ヒドロキシ-7’-メトキシ-8’-[(5-{[(11a’S)-7’-メトキシ-5’-オキソ-5’,10’,11’,11a’-テトラヒドロ-1’H-スピロ[シクロプロパン-1,2’-ピロロ[2,1-c][1,4]ベンゾジアゼピン]-8’-イル]オキシ}ペンチル)オキシ]-5’-オキソ-11’,11a’-ジヒドロ-1’H-スピロ[シクロプロパン-1,2’-ピロロ[2,1-c][1,4]ベンゾジアゼピン]-10’(5’H)-イル]カルボニル}オキシ)メチル]フェニル}-L-アラニンアミド
また、実施例17~27で得られるADCの式中Rは以下である。
参考例2)-1 抗体-薬物コンジュゲートの作製 NOV0712-DM4
抗体と薬物リンカーのコンジュゲーション:参考例1にて作製したNOV0712を、製造方法1に記載した共通操作B(280nm吸光係数として1.51mLmg-1cm-1を使用)及びCを用いて、20mM HEPES8.1(LIFE TECHNOLOGIES社製 HEPES, 1M Buffer Solution(20mL)を1M水酸化ナトリウムでpH8.1とした後、蒸留水にて1Lとした)にて9.7mg/mLに調製し、20℃で10分間インキュベートした。次いでWO2016/024195号公開特許公報に記載の10mM 1-(2,5-ジオキソピロリジン-1-イルオキシ)-1-オキソ-4-(ピリジン-2-イルジスルファニル)ブタン-2-スルフォン酸のDMA溶液(0.366mL;抗体一分子に対して5.2当量)、10mM N2’-デアセチル-デアセチル-N2’-(4-メチル-4-メルカプト-1-オキソペンチル)-メイタンシン(DM4)のDMA溶液(0.366mL;抗体一分子に対して6.8当量)、及び0.243mLのDMAを加え、20℃で16時間インキュベートし、薬物リンカーを抗体へ結合させた。次に、1M 酢酸水溶液を加えpH5.0とし、さらに室温にて20分間撹拌し、薬物リンカーの反応を停止させた。
抗体濃度:2.58mg/mL,抗体収量:72.2mg(93%),共通操作Eにて測定された抗体一分子あたりの平均薬物結合数(n):3.0。
CDH6陽性ヒト腫瘍細胞株に対する抗体-薬物コンジュゲートのin vitro細胞増殖抑制活性評価
実施例2)-3にてCDH6の発現を確認した、ヒト卵巣腫瘍細胞株NIH:OVCAR-3,OV-90,PA-1及びヒト腎細胞腫瘍細胞株786-O(全てATCCから入手)を37℃、5% CO2の条件下で培養した後、図9に示す各細胞株の播種数/100μL/wellになるよう96ウェルプレートに播種し、37℃、5% CO2の条件下で一晩培養した。翌日、実施例27で作製したADC11、実施例17で作製したADC1、実施例21で作製したADC5、実施例23で作製したADC7、又は実施例22で作製したADC6を、終濃度100(nM)から0.000256(nM)になるように、5倍公比で希釈した抗体-薬物コンジュゲートを添加した。6日間培養後に生存細胞数をCellTiter-GloTM Luminescent Cell Viability Assay(Promega)によるATPの定量で測定した。細胞増殖抑制活性としてのIC50値は次式で算出し、小数点第3位を四捨五入し小数点第2位まで表記した。
IC50(nM)=antilog((50-d)×(LOG10(b)-LOG10(a))÷(d-c)+LOG10(b))
a:検体濃度a
b:検体濃度b
c:検体濃度aにおける生細胞率
d:検体濃度bにおける生細胞率
a、bは生細胞率50%を挟む2点でa>b
図9に抗体-薬物コンジュゲートを各々添加した際のIC50(nM)を示した。In vitroでのCDH6発現量が高い卵巣腫瘍細胞株3株では、CDH6へ結合しない抗体-薬物コンジュゲートであるADC11のIC50値に比べて、3種の抗CDH6抗体の薬物コンジュゲートのIC50値は極めて低いことから、CDH6の発現に特異的な非常に強い細胞増殖抑制活性を有することが示された。また、抗体のCDH6への結合活性(表3)と、抗体-薬物コンジュゲートの細胞増殖抑制活性に相関が認められた。In vitroでのCDH6発現量が低い腎細胞腫瘍細胞株においても、同様の傾向が認められた(図9)。
抗体-薬物コンジュゲートの抗腫瘍効果は、CDH6陽性ヒト腫瘍細胞株の細胞を免疫不全マウスに移植した動物モデルを用いて評価した。4-5週齢のBALB/c ヌードマウス(CAnN.Cg-Foxnl[nu]/CrlCrlj[Foxnlnu/Foxnlnu]、日本チャールス・リバー)及び、SCIDマウス(CB17/Icr-Prkdc[scid]/CrlCrlj、日本チャールス・リバー)を実験使用前にSPF条件化で3日間以上馴化した。マウスには滅菌した固形飼料(FR-2,Funabashi Farms Co.,Ltd)を給餌し、滅菌した水道水(5-15ppm次亜塩素酸ナトリウム溶液を添加して調製)を与えた。移植した腫瘍の長径及び短径を電子式デジタルノギス(CD-15CX,Mitutoyo Corp.)で1週間に2回測定し、以下に示す計算式により腫瘍体積を算出した。
腫瘍体積(mm3)=1/2×長径(mm)×[短径(mm)]2
抗体-薬物コンジュゲートは全てABS緩衝液(10mM-Acetate Buffer, 5% Sorbitol, pH5.5)(NACALAI)で希釈し、各実施例に示す用量にて尾静脈内投与した。また、コントロール群(Vehicle群)としてABS緩衝液を同様に投与した。1群あたり6匹のマウスを実験に用いた。
実施例2)-3にてCDH6の発現を確認した、CDH6陽性ヒト卵巣腫瘍細胞株OV-90(ATCC)をマトリゲル(コーニング社)に懸濁し、2.5×106cellsを雌ヌードマウスの右側腹部に皮下移植し(Day0)、Day14に無作為に群分けを実施した。群分け実施日に、実施例17で作製したADC1、又は実施例27で作製したADC11を、0.4mg/kgの用量で尾静脈内投与した。また、参考例2)-1で作製したNOV0712-DM4を、10mg/kgの用量で尾静脈内投与した。結果を図10に示す。横軸は投与後日数、縦軸は腫瘍体積、誤差範囲はSE値を示す。
実施例2)-3にてCDH6の発現を確認した、CDH6陽性ヒト腎細胞腫瘍細胞株Caki-1(ATCC)をマトリゲル(コーニング社)に懸濁し、2.5×106cellsを雌ヌードマウスの右側腹部に皮下移植し(Day0)、Day13に無作為に群分けを実施した。群分け実施日に、実施例17で作製した抗体-薬物コンジュゲートADC1、又は実施例27で作製したADC11を、0.4mg/kgの用量で尾静脈内投与した。また、参考例2)-1で作製したNOV0712-DM4を、10mg/kgの用量で尾静脈内投与した。結果を図11に示す。横軸は投与後日数、縦軸は腫瘍体積、誤差範囲はSE値を示す。
実施例2)-3にてCDH6の発現を確認した、CDH6陽性ヒト卵巣腫瘍細胞株NIH:OVCAR-3(ATCC)をマトリゲル(コーニング社)に懸濁し、1×107cellsを雌ヌードマウスの右側腹部に皮下移植し(Day0)、Day28に無作為に群分けを実施した。群分け実施日に、実施例17で作製したADC1、実施例21で作製したADC5、実施例22で作製したADC6、又は実施例27で作製したADC11を、0.4mg/kgの用量で尾静脈内投与した。結果を図12に示す。横軸は投与後日数、縦軸は腫瘍体積、誤差範囲はSE値を示す。
実施例2)-3にてCDH6の発現を確認した、CDH6陽性ヒト卵巣腫瘍細胞株OV-90(ATCC)をマトリゲル(コーニング社)に懸濁し、2.5×106cellsを雌ヌードマウスの右側腹部に皮下移植し(Day0)、Day17に無作為に群分けを実施した。群分け実施日に、実施例17で作製したADC1、実施例21で作製したADC5、実施例23で作製したADC7、又は実施例22で作製したADC6を、0.2mg/kg又は0.4mg/kgの用量で尾静脈内投与した。結果を図13に示す。横軸は投与後日数、縦軸は腫瘍体積、誤差範囲はSE値を示す。
実施例2)-3にてCDH6の発現を確認した、CDH6陽性ヒト卵巣腫瘍細胞株PA-1(ATCC)をマトリゲル(コーニング社)に懸濁し、7.5×106cellsを雌ヌードマウスの右側腹部に皮下移植し(Day0)、Day17に無作為に群分けを実施した。群分け実施日に、実施例21で作製したADC5、実施例22で作製したADC6又は実施例27で作製したADC11を、0.4mg/kgの用量で尾静脈内投与した。結果を図14に示す。横軸は投与後日数、縦軸は腫瘍体積、誤差範囲はSE値を示す。
実施例2)-3にてCDH6の発現を確認した、CDH6陽性ヒト腎細胞腫瘍細胞株786-O(ATCC)をマトリゲル(コーニング社)に懸濁し、5×106cellsを雄SCIDマウスの右側腹部に皮下移植し(Day0)、Day38に無作為に群分けを実施した。群分け実施日に、実施例21で作製したADC5、実施例22で作製したADC6を、0.4mg/kgの用量で尾静脈内投与した。また、実施例27で作製したADC11を、0.4mg/kgの用量で尾静脈内投与した。結果を図15に示す。横軸は投与後日数、縦軸は腫瘍体積、誤差範囲はSE値を示す。
配列番号2:EC1
配列番号3:EC2
配列番号4:EC3
配列番号5:EC4
配列番号6:EC5
配列番号7:カニクイザルCDH6 ORF
配列番号8:カニクイザルCDH6 プライマー1
配列番号9:カニクイザルCDH6 プライマー2
配列番号10:rG019の軽鎖の可変領域アミノ酸配列
配列番号11:rG019の軽鎖の可変領域ヌクレオチド配列
配列番号12:rG019 CDRL1
配列番号13:rG019 CDRL2
配列番号14:rG019 CDRL3
配列番号15:rG019の重鎖の可変領域アミノ酸配列
配列番号16:rG019の重鎖の可変領域ヌクレオチド配列
配列番号17:rG019 CDRH1
配列番号18:rG019 CDRH2
配列番号19:rG019 CDRH3
配列番号20:ヒト軽鎖シグナル配列及びヒトκ鎖定常領域をコードするDNA配列を含むDNA断片
配列番号21:ヒト重鎖シグナル配列及びヒトIgG1定常領域をコードするDNA配列を含むDNA断片
配列番号22:chG019軽鎖をコードするDNA断片を含むDNA断片
配列番号23:chG019軽鎖全長アミノ酸配列
配列番号24:chG019軽鎖全長ヌクレオチド配列
配列番号25:chG019軽鎖可変領域ヌクレオチド配列
配列番号26:chG019重鎖全長アミノ酸配列
配列番号27:chG019重鎖全長ヌクレオチド配列
配列番号28:chG019重鎖可変領域アミノ酸配列
配列番号29:chG019重鎖可変領域ヌクレオチド配列
配列番号30:chG019 CDRH2
配列番号31:hL02の軽鎖全長アミノ酸配列
配列番号32:hL02の軽鎖全長ヌクレオチド配列
配列番号33:hL02の軽鎖可変領域アミノ酸配列
配列番号34:hL02の軽鎖可変領域ヌクレオチド配列
配列番号35:hL03の軽鎖全長アミノ酸配列
配列番号36:hL03の軽鎖全長ヌクレオチド配列
配列番号37:hL03の軽鎖可変領域アミノ酸配列
配列番号38:hL03の軽鎖可変領域ヌクレオチド配列
配列番号39:hH01の重鎖全長アミノ酸配列
配列番号40:hH01の重鎖全長ヌクレオチド配列
配列番号41:hH01の重鎖可変領域アミノ酸配列
配列番号42:hH01の重鎖可変領域ヌクレオチド配列
配列番号43:hH02の重鎖全長アミノ酸配列
配列番号44:hH02の重鎖全長ヌクレオチド配列
配列番号45:hH02の重鎖可変領域アミノ酸配列
配列番号46:hH02の重鎖可変領域ヌクレオチド配列
配列番号47:hH04の重鎖全長アミノ酸配列
配列番号48:hH04の重鎖全長ヌクレオチド配列
配列番号49:hH04の重鎖可変領域アミノ酸配列
配列番号50:hH04の重鎖可変領域ヌクレオチド配列
配列番号51:NOV0712軽鎖全長アミノ酸配列
配列番号52:配列番号51に記載のアミノ酸配列をコードするヌクレオチド配列
配列番号53:NOV0712重鎖全長アミノ酸配列
配列番号54:配列番号53に記載のアミノ酸配列をコードするヌクレオチド配列
配列番号55:hH11の重鎖可変領域アミノ酸配列
配列番号56:hH11の重鎖可変領域ヌクレオチド配列
配列番号57:hH11 CDRH1
配列番号58:hH11 CDRH2
配列番号59:hH11 CDRH3
配列番号60:hH31の重鎖可変領域アミノ酸配列
配列番号61:hH31の重鎖可変領域ヌクレオチド配列
配列番号62:hH31 CDRH1
配列番号63:hH31 CDRH2
配列番号64:hH31 CDRH3
配列番号65:hH01Aの重鎖全長アミノ酸配列
配列番号66:hH01Aの重鎖全長ヌクレオチド配列
配列番号67:hH11Aの重鎖全長アミノ酸配列
配列番号68:hH11Aの重鎖全長ヌクレオチド配列
配列番号69:hH31Aの重鎖全長アミノ酸配列
配列番号70:hH31Aの重鎖全長ヌクレオチド配列
配列番号71:ヒト重鎖シグナル配列及びヒトIgG1LALA定常領域のアミノ酸をコードするDNA配列を含むDNA断片
配列番号72:抗LPS抗体軽鎖全長アミノ酸配列
配列番号73:抗LPS抗体重鎖全長アミノ酸配列
Claims (65)
- 前記抗体又は当該抗体の機能性断片が、配列番号4に記載のアミノ酸配列を含むアミノ酸配列への結合に対して、以下の(1)~(8):
(1)配列番号23の21~233番目のアミノ酸配列からなる軽鎖及び配列番号26の20~471番目のアミノ酸配列からなる重鎖を有する抗体、
(2)配列番号31の21~233番目のアミノ酸配列からなる軽鎖及び配列番号39の20~471番目のアミノ酸配列からなる重鎖を有する抗体、
(3)配列番号31の21~233番目のアミノ酸配列からなる軽鎖及び配列番号43の20~471番目のアミノ酸配列からなる重鎖を有する抗体、
(4)配列番号35の21~233番目のアミノ酸配列からなる軽鎖及び配列番号43の20~471番目のアミノ酸配列からなる重鎖を有する抗体、
(5)配列番号31の21~233番目のアミノ酸配列からなる軽鎖及び配列番号47の20~471番目のアミノ酸配列からなる重鎖を有する抗体、
(6)配列番号31の21~233番目のアミノ酸配列からなる軽鎖及び配列番号65の20~471番目のアミノ酸配列からなる重鎖を有する抗体、
(7)配列番号31の21~233番目のアミノ酸配列からなる軽鎖及び配列番号67の20~471番目のアミノ酸配列からなる重鎖を有する抗体、及び
(8)配列番号31の21~233番目のアミノ酸配列からなる軽鎖及び配列番号69の20~471番目のアミノ酸配列からなる重鎖を有する抗体、
からなる群から選択される抗体のうち少なくともいずれか1つと競合阻害活性を示す、
請求項1に記載の抗体-薬物コンジュゲート。 - 前記抗体又は当該抗体の機能性断片が、以下の(1)~(4):
(1)配列番号12に記載のアミノ酸配列からなるCDRL1、配列番号13に記載のアミノ酸配列からなるCDRL2及び配列番号14に記載のアミノ酸配列からなるCDRL3、及び、配列番号17に記載のアミノ酸配列からなるCDRH1、配列番号18に記載のアミノ酸配列からなるCDRH2及び配列番号19に記載のアミノ酸配列からなるCDRH3、
(2)配列番号12に記載のアミノ酸配列からなるCDRL1、配列番号13に記載のアミノ酸配列からなるCDRL2及び配列番号14に記載のアミノ酸配列からなるCDRL3、及び、配列番号17に記載のアミノ酸配列からなるCDRH1、配列番号30に記載のアミノ酸配列からなるCDRH2及び配列番号19に記載のアミノ酸配列からなるCDRH3、
(3)配列番号12に記載のアミノ酸配列からなるCDRL1、配列番号13に記載のアミノ酸配列からなるCDRL2及び配列番号14に記載のアミノ酸配列からなるCDRL3、及び、配列番号57に記載のアミノ酸配列からなるCDRH1、配列番号58に記載のアミノ酸配列からなるCDRH2及び配列番号59に記載のアミノ酸配列からなるCDRH3、及び
(4)配列番号12に記載のアミノ酸配列からなるCDRL1、配列番号13に記載のアミノ酸配列からなるCDRL2及び配列番号14に記載のアミノ酸配列からなるCDRL3、及び、配列番号62に記載のアミノ酸配列からなるCDRH1、配列番号63に記載のアミノ酸配列からなるCDRH2及び配列番号64に記載のアミノ酸配列からなるCDRH3、
からなる群から選択されるCDRL1、CDRL2及びCDRL3、及び、CDRH1、CDRH2及びCDRH3を含む、
請求項1又は2のいずれか1項に記載の抗体-薬物コンジュゲート。 - 前記抗体又は当該抗体の機能性断片が、以下の(1)~(4):
(1)配列番号33に記載のアミノ酸配列からなる軽鎖可変領域、
(2)配列番号37に記載のアミノ酸配列からなる軽鎖可変領域、
(3)(1)又は(2)のアミノ酸配列において各CDR配列以外のフレームワーク領域の配列に対して少なくとも95%以上の配列同一性を有するアミノ酸配列、及び
(4)(1)~(3)のアミノ酸配列において各CDR配列以外のフレームワーク領域の配列において1又は数個のアミノ酸が欠失、置換又は付加されたアミノ酸配列
からなる群から選択されるいずれか1つに記載の軽鎖可変領域、並びに、
以下の(5)~(11):
(5)配列番号41に記載のアミノ酸配列からなる重鎖可変領域、
(6)配列番号45に記載のアミノ酸配列からなる重鎖可変領域、
(7)配列番号49に記載のアミノ酸配列からなる重鎖可変領域、
(8)配列番号55に記載のアミノ酸配列からなる重鎖可変領域、
(9)配列番号60に記載のアミノ酸配列からなる重鎖可変領域、
(10)(5)~(9)のアミノ酸配列において各CDR配列以外のフレームワーク領域の配列に対して少なくとも95%以上の配列同一性を有するアミノ酸配列、及び
(11)(5)~(10)のアミノ酸配列において各CDR配列以外のフレームワーク領域の配列において1又は数個のアミノ酸が欠失、置換又は付加されたアミノ酸配列
からなる群から選択されるいずれか1つに記載の重鎖可変領域、
を含む、請求項1~3のいずれか1項に記載の抗体-薬物コンジュゲート。 - 前記抗体又は当該抗体の機能性断片が、以下の(1)~(6):
(1)配列番号33に記載のアミノ酸配列からなる軽鎖可変領域及び配列番号41に記載のアミノ酸配列からなる重鎖可変領域、
(2)配列番号33に記載のアミノ酸配列からなる軽鎖可変領域及び配列番号45に記載のアミノ酸配列からなる重鎖可変領域、
(3)配列番号37に記載のアミノ酸配列からなる軽鎖可変領域及び配列番号45に記載のアミノ酸配列からなる重鎖可変領域、
(4)配列番号33に記載のアミノ酸配列からなる軽鎖可変領域及び配列番号49に記載のアミノ酸配列からなる重鎖可変領域、
(5)配列番号33に記載のアミノ酸配列からなる軽鎖可変領域及び配列番号55に記載のアミノ酸配列からなる重鎖可変領域、又は
(6)配列番号33に記載のアミノ酸配列からなる軽鎖可変領域及び配列番号60に記載のアミノ酸配列からなる重鎖可変領域、
のいずれかの軽鎖可変領域及び重鎖可変領域、
を含む、請求項1~4のいずれか1項に記載の抗体-薬物コンジュゲート。 - 前記抗体又は当該抗体の機能性断片が、以下の(1)~(7):
(1)配列番号31の21~233番目のアミノ酸配列からなる軽鎖及び配列番号39の20~471番目のアミノ酸配列からなる重鎖、
(2)配列番号31の21~233番目のアミノ酸配列からなる軽鎖及び配列番号43の20~471番目のアミノ酸配列からなる重鎖、
(3)配列番号35の21~233番目のアミノ酸配列からなる軽鎖及び配列番号43の20~471番目のアミノ酸配列からなる重鎖、
(4)配列番号31の21~233番目のアミノ酸配列からなる軽鎖及び配列番号47の20~471番目のアミノ酸配列からなる重鎖、
(5)配列番号31の21~233番目のアミノ酸配列からなる軽鎖及び配列番号65の20~471番目のアミノ酸配列からなる重鎖、
(6)配列番号31の21~233番目のアミノ酸配列からなる軽鎖及び配列番号67の20~471番目のアミノ酸配列からなる重鎖、又は
(7)配列番号31の21~233番目のアミノ酸配列からなる軽鎖及び配列番号69の20~471番目のアミノ酸配列からなる重鎖、
のいずれかを有する、請求項1~5のいずれか1項に記載の抗体-薬物コンジュゲート。 - 前記抗体又は当該抗体の機能性断片が、配列番号31の21~233番目のアミノ酸配列からなる軽鎖及び配列番号39の20~471番目のアミノ酸配列からなる重鎖を有する、請求項6に記載の抗体-薬物コンジュゲート。
- 前記抗体又は当該抗体の機能性断片が、配列番号31の21~233番目のアミノ酸配列からなる軽鎖及び配列番号43の20~471番目のアミノ酸配列からなる重鎖を有する、請求項6に記載の抗体-薬物コンジュゲート。
- 前記抗体又は当該抗体の機能性断片が、配列番号35の21~233番目のアミノ酸配列からなる軽鎖及び配列番号43の20~471番目のアミノ酸配列からなる重鎖を有する、請求項6に記載の抗体-薬物コンジュゲート。
- 前記抗体又は当該抗体の機能性断片が、配列番号31の21~233番目のアミノ酸配列からなる軽鎖及び配列番号47の20~471番目のアミノ酸配列からなる重鎖を有する、請求項6に記載の抗体-薬物コンジュゲート。
- 前記抗体又は当該抗体の機能性断片が、配列番号31の21~233番目のアミノ酸配列からなる軽鎖及び配列番号65の20~471番目のアミノ酸配列からなる重鎖を有する請求項6に記載の抗体-薬物コンジュゲート。
- 前記抗体又は当該抗体の機能性断片が、配列番号31の21~233番目のアミノ酸配列からなる軽鎖及び配列番号67の20~471番目のアミノ酸配列からなる重鎖を有する請求項6に記載の抗体-薬物コンジュゲート。
- 前記抗体又は当該抗体の機能性断片が、配列番号31の21~233番目のアミノ酸配列からなる軽鎖及び配列番号69の20~471番目のアミノ酸配列からなる重鎖を有する請求項6に記載の抗体-薬物コンジュゲート。
- Lが、-Lb-La-Lp-NH-B-CH2-O(C=O)-*で示され、
式中、*は前記DのN10’位の窒素原子と結合していることを示し、
Bは、1,4-フェニル基、2,5-ピリジル基、3,6-ピリジル基、2,5-ピリミジル基又は2,5-チエニル基であり、
Lpは、以下:
-GGVA-、-GG-(D-)VA-、-VA-、-GGFG-、-GGPI-、-GGVCit-、-GGVK-、及び、-GGPL-、
からなる群から選択されるいずれか1つを示し、
Laは、以下:
-C(=O)-CH2CH2-C(=O)-、
-C(=O)-(CH2CH2)2-C(=O)-、
-C(=O)-CH2CH2-C(=O)-NH-(CH2CH2)2-C(=O)-、
-C(=O)-CH2CH2-C(=O)-NH-(CH2CH2O)2-CH2-C(=O)-、
-C(=O)-CH2CH2-NH-C(=O)-(CH2CH2O)4-CH2CH2-C(=O)-、
-CH2-OC(=O)-、及び、
-OC(=O)-、
からなる群から選択されるいずれか1つを示し、並びに、
Lbは、次式:
請求項1~13のいずれか1項に記載の抗体-薬物コンジュゲート。 - Lが、以下:
-Z1-C(=O)-CH2CH2-C(=O)-GGVA-NH-B-CH2-OC(=O)-、
-Z1-C(=O)-CH2CH2-C(=O)-GG-(D-)VA-NH-B-CH2-OC(=O)-、
-Z1-C(=O)-CH2CH2-C(=O)-VA-NH-B-CH2-OC(=O)-、
-Z1-C(=O)-(CH2CH2)2-C(=O)-VA-NH-B-CH2-OC(=O)-、
-Z1-C(=O)-CH2CH2-C(=O)-GGPI-NH-B-CH2-OC(=O)-、
-Z1-C(=O)-CH2CH2-C(=O)-GGFG-NH-B-CH2-OC(=O)-、
-Z1-C(=O)-CH2CH2-C(=O)-GGVCit-NH-B-CH2-OC(=O)-、
-Z1-C(=O)-CH2CH2-C(=O)-GGVK-NH-B-CH2-OC(=O)-、
-Z1-C(=O)-CH2CH2-C(=O)-GGPL-NH-B-CH2-OC(=O)-、
-Z1-C(=O)-CH2CH2-C(=O)-NH-(CH2CH2)2-C(=O)-VA-NH-B-CH2-OC(=O)-、
-Z1-C(=O)-CH2CH2-C(=O)-NH-(CH2CH2O)2-CH2-C(=O)-VA-NH-B-CH2-OC(=O)-、
-Z1-C(=O)-CH2CH2-NH-C(=O)-(CH2CH2O)4-CH2CH2-C(=O)-VA-NH-B-CH2-OC(=O)-、
-Z2-OC(=O)-GGVA-NH-B-CH2-OC(=O)-、及び
-Z3-CH2-OC(=O)-GGVA-NH-B-CH2-OC(=O)-
からなる群から選択されるいずれか1つを示し、
ここで、Z1は、以下の構造式:
Z2は、以下の構造式:
Z3は、以下の構造式:
ここで、Z1、Z2及びZ3の構造式において、*はZ1、Z2又はZ3に隣接するC(=O)、O又はCH2と結合していることを示し、波線はAbの糖鎖又はリモデリングされた糖鎖と結合していることを示し、並びに、
Bは、1,4-フェニル基を示す、
請求項1~14のいずれか1項に記載の抗体-薬物コンジュゲート。 - Lが、以下:
-Z1-C(=O)-CH2CH2-C(=O)-GGVA-NH-B-CH2-OC(=O)-、
-Z1-C(=O)-CH2CH2-C(=O)-VA-NH-B-CH2-OC(=O)-、
-Z1-C(=O)-(CH2CH2)2-C(=O)-VA-NH-B-CH2-OC(=O)-、
-Z1-C(=O)-CH2CH2-C(=O)-GGVCit-NH-B-CH2-OC(=O)-、
-Z1-C(=O)-CH2CH2-C(=O)-NH-(CH2CH2)2-C(=O)-VA-NH-B-CH2-OC(=O)-、
-Z1-C(=O)-CH2CH2-C(=O)-NH-(CH2CH2O)2-CH2-C(=O)-VA-NH-B-CH2-OC(=O)-、及び
-Z1-C(=O)-CH2CH2-NH-C(=O)-(CH2CH2O)4-CH2CH2-C(=O)-VA-NH-B-CH2-OC(=O)-
からなる群から選択されるいずれか1つを示し、
ここで、Bは1,4-フェニル基であり、Z1は以下の構造式:
ここで、Z1の構造式において、*はZ1に隣接するC(=O)と結合していることを示し、波線はAbのN297に結合する糖鎖(N297糖鎖)又はそのリモデリングされた糖鎖と結合していることを示す、請求項1~15のいずれか1項に記載の抗体-薬物コンジュゲート。 - 抗体が、IgG1、IgG2又はIgG4である、請求項1~16のいずれか1項に記載の抗体-薬物コンジュゲート。
- N297糖鎖が、リモデリングされた糖鎖である、請求項1~17のいずれか1項に記載の抗体-薬物コンジュゲート。
- N297糖鎖が、次式で示される構造を有するN297-(Fuc)MSG1、N297-(Fuc)MSG2もしくはそれらの混合物、又はN297-(Fuc)SGである、請求項1~18のいずれか1項に記載の抗体-薬物コンジュゲート:
N297糖鎖中の*-L(PEG)-は、*-(CH2CH2-O)n5-CH2CH2-NH-を示し、
ここで、n5は2~5の整数であることを示し、右端のアミノ基がN297糖鎖のβ-Manの分岐鎖の1-3鎖側又は/及び1-6鎖側の非還元末端のシアル酸の2位のカルボン酸とアミド結合していることを示し、*は、それぞれの構造式におけるトリアゾール環上の1位又は3位の窒素原子と結合していることを示す。 - n5が3である、請求項19に記載の抗体-薬物コンジュゲート。
- 次の式(XII):
上記で示されるそれぞれの構造式において、m2は1又は2の整数であることを示し、
Abは配列番号4に記載のアミノ酸配列を含むアミノ酸配列に特異的に結合し、細胞内に取り込まれる内在化能を有する、IgG抗体又は当該抗体の機能性断片を示し、
AbのN297糖鎖は次式で示される構造を有するN297-(Fuc)MSG1、N297-(Fuc)MSG2もしくはそれらの混合物、又はN297-(Fuc)SGのいずれか1つであることを示し、
N297糖鎖中の*-L(PEG)-は、*-(CH2CH2-O)3-CH2CH2-NH-であることを示し、
ここで、右端のアミノ基がN297糖鎖のβ-Manの分岐鎖の1-3鎖側又は/及び1-6鎖側の非還元末端のシアル酸の2位のカルボン酸とアミド結合していることを示し、*は、それぞれの構造式におけるトリアゾール環上の1位又は3位の窒素原子と結合していることを示す、抗体-薬物コンジュゲート。 - 次の式(XIII):
上記で示されるそれぞれの構造式において、m2は1又は2の整数であることを示し、
Abは配列番号4に記載のアミノ酸配列を含むアミノ酸配列に特異的に結合し、細胞内に取り込まれる内在化能を有する、IgG抗体又は当該抗体の機能性断片を示し、
AbのN297糖鎖は次式で示される構造を有するN297-(Fuc)MSG1、N297-(Fuc)MSG2もしくはそれらの混合物、又はN297-(Fuc)SGのいずれか1つであることを示し、
N297糖鎖中の*-L(PEG)-は、*-(CH2CH2-O)3-CH2CH2-NH-であることを示し、
ここで、右端のアミノ基がN297糖鎖のβ-Manの分岐鎖の1-3鎖側又は/及び1-6鎖側の非還元末端のシアル酸の2位のカルボン酸とアミド結合していることを示し、*は、それぞれの構造式におけるトリアゾール環上の1位又は3位の窒素原子と結合していることを示す、抗体-薬物コンジュゲート。 - 次の式(XIV):
上記で示されるそれぞれの構造式において、m2は1又は2の整数であることを示し、
Abは配列番号4に記載のアミノ酸配列を含むアミノ酸配列に特異的に結合し、細胞内に取り込まれる内在化能を有する、IgG抗体又は当該抗体の機能性断片を示し、
AbのN297糖鎖は次式で示される構造を有するN297-(Fuc)MSG1、N297-(Fuc)MSG2もしくはそれらの混合物、又はN297-(Fuc)SGのいずれか1つであることを示し、
N297糖鎖中の*-L(PEG)-は、*-(CH2CH2-O)3-CH2CH2-NH-でであることを示し、
ここで、右端のアミノ基がN297糖鎖のβ-Manの分岐鎖の1-3鎖側又は/及び1-6鎖側の非還元末端のシアル酸の2位のカルボン酸とアミド結合していることを示し、*は、それぞれの構造式におけるトリアゾール環上の1位又は3位の窒素原子と結合していることを示す、抗体-薬物コンジュゲート。 - 次の式(XV):
上記で示されるそれぞれの構造式において、m2は1又は2の整数であることを示し、
Abは配列番号4に記載のアミノ酸配列を含むアミノ酸配列に特異的に結合し、細胞内に取り込まれる内在化能を有する、IgG抗体又は当該抗体の機能性断片を示し、
AbのN297糖鎖は次式で示される構造を有するN297-(Fuc)MSG1、N297-(Fuc)MSG2もしくはそれらの混合物、又はN297-(Fuc)SGのいずれか1つであることを示し、
N297糖鎖中の*-L(PEG)-は、*-(CH2CH2-O)3-CH2CH2-NH-でであることを示し、
ここで、右端のアミノ基がN297糖鎖のβ-Manの分岐鎖の1-3鎖側又は/及び1-6鎖側の非還元末端のシアル酸の2位のカルボン酸とアミド結合していることを示し、*は、それぞれの構造式におけるトリアゾール環上の1位又は3位の窒素原子と結合していることを示す、抗体-薬物コンジュゲート。 - 前記抗体又は当該抗体の機能性断片が、以下の(1)~(4):
(1)配列番号12に記載のアミノ酸配列からなるCDRL1、配列番号13に記載のアミノ酸配列からなるCDRL2及び配列番号14に記載のアミノ酸配列からなるCDRL3、及び、配列番号17に記載のアミノ酸配列からなるCDRH1、配列番号18に記載のアミノ酸配列からなるCDRH2及び配列番号19に記載のアミノ酸配列からなるCDRH3、
(2)配列番号12に記載のアミノ酸配列からなるCDRL1、配列番号13に記載のアミノ酸配列からなるCDRL2及び配列番号14に記載のアミノ酸配列からなるCDRL3、及び、配列番号17に記載のアミノ酸配列からなるCDRH1、配列番号30に記載のアミノ酸配列からなるCDRH2及び配列番号19に記載のアミノ酸配列からなるCDRH3、
(3)配列番号12に記載のアミノ酸配列からなるCDRL1、配列番号13に記載のアミノ酸配列からなるCDRL2及び配列番号14に記載のアミノ酸配列からなるCDRL3、及び、配列番号57に記載のアミノ酸配列からなるCDRH1、配列番号58に記載のアミノ酸配列からなるCDRH2及び配列番号59に記載のアミノ酸配列からなるCDRH3、及び
(4)配列番号12に記載のアミノ酸配列からなるCDRL1、配列番号13に記載のアミノ酸配列からなるCDRL2及び配列番号14に記載のアミノ酸配列からなるCDRL3、及び、配列番号62に記載のアミノ酸配列からなるCDRH1、配列番号63に記載のアミノ酸配列からなるCDRH2及び配列番号64に記載のアミノ酸配列からなるCDRH3、
からなる群から選択されるCDRL1、CDRL2及びCDRL3、及び、CDRH1、CDRH2及びCDRH3を含む、
請求項21~28のいずれか1項に記載の抗体-薬物コンジュゲート。 - 前記抗体又は当該抗体の機能性断片が、以下の(1)~(6):
(1)配列番号33に記載のアミノ酸配列からなる軽鎖可変領域及び配列番号41に記載のアミノ酸配列からなる重鎖可変領域、
(2)配列番号33に記載のアミノ酸配列からなる軽鎖可変領域及び配列番号45に記載のアミノ酸配列からなる重鎖可変領域、
(3)配列番号37に記載のアミノ酸配列からなる軽鎖可変領域及び配列番号45に記載のアミノ酸配列からなる重鎖可変領域、
(4)配列番号33に記載のアミノ酸配列からなる軽鎖可変領域及び配列番号49に記載のアミノ酸配列からなる重鎖可変領域、
(5)配列番号33に記載のアミノ酸配列からなる軽鎖可変領域及び配列番号55に記載のアミノ酸配列からなる重鎖可変領域、又は
(6)配列番号33に記載のアミノ酸配列からなる軽鎖可変領域及び配列番号60に記載のアミノ酸配列からなる重鎖可変領域、
のいずれかの軽鎖可変領域及び重鎖可変領域、
を含む、請求項21~29のいずれか1項に記載の抗体-薬物コンジュゲート。 - 前記抗体又は当該抗体の機能性断片が、以下の(1)~(7):
(1)配列番号31の21~233番目のアミノ酸配列からなる軽鎖及び配列番号39の20~471番目のアミノ酸配列からなる重鎖、
(2)配列番号31の21~233番目のアミノ酸配列からなる軽鎖及び配列番号43の20~471番目のアミノ酸配列からなる重鎖、
(3)配列番号35の21~233番目のアミノ酸配列からなる軽鎖及び配列番号43の20~471番目のアミノ酸配列からなる重鎖、
(4)配列番号31の21~233番目のアミノ酸配列からなる軽鎖及び配列番号47の20~471番目のアミノ酸配列からなる重鎖、
(5)配列番号31の21~233番目のアミノ酸配列からなる軽鎖及び配列番号65の20~471番目のアミノ酸配列からなる重鎖、
(6)配列番号31の21~233番目のアミノ酸配列からなる軽鎖及び配列番号67の20~471番目のアミノ酸配列からなる重鎖、又は
(7)配列番号31の21~233番目のアミノ酸配列からなる軽鎖及び配列番号69の20~471番目のアミノ酸配列からなる重鎖、
のいずれかを有する、請求項21~30のいずれか1項に記載の抗体-薬物コンジュゲート。 - 前記抗体又は当該抗体の機能性断片が、配列番号31の21~233番目のアミノ酸配列からなる軽鎖及び配列番号39の20~471番目のアミノ酸配列からなる重鎖を有する、請求項31に記載の抗体-薬物コンジュゲート。
- 前記抗体又は当該抗体の機能性断片が、配列番号31の21~233番目のアミノ酸配列からなる軽鎖及び配列番号43の20~471番目のアミノ酸配列からなる重鎖を有する、請求項31に記載の抗体-薬物コンジュゲート。
- 前記抗体又は当該抗体の機能性断片が、配列番号35の21~233番目のアミノ酸配列からなる軽鎖及び配列番号43の20~471番目のアミノ酸配列からなる重鎖を有する、請求項31に記載の抗体-薬物コンジュゲート。
- 前記抗体又は当該抗体の機能性断片が、配列番号31の21~233番目のアミノ酸配列からなる軽鎖及び配列番号47の20~471番目のアミノ酸配列からなる重鎖を有する、請求項31に記載の抗体-薬物コンジュゲート。
- 前記抗体又は当該抗体の機能性断片が、配列番号31の21~233番目のアミノ酸配列からなる軽鎖及び配列番号65の20~471番目のアミノ酸配列からなる重鎖を有する、請求項31に記載の抗体-薬物コンジュゲート。
- 前記抗体又は当該抗体の機能性断片が、配列番号31の21~233番目のアミノ酸配列からなる軽鎖及び配列番号67の20~471番目のアミノ酸配列からなる重鎖を有する、請求項31に記載の抗体-薬物コンジュゲート。
- 前記抗体又は当該抗体の機能性断片が、配列番号31の21~233番目のアミノ酸配列からなる軽鎖及び配列番号69の20~471番目のアミノ酸配列からなる重鎖を有する、請求項31に記載の抗体-薬物コンジュゲート。
- 抗体―薬物コンジュゲートにおける抗体1分子あたりの平均薬物結合数が、1~3である、請求項1~38のいずれか1項に記載の抗体―薬物コンジュゲート。
- 抗体―薬物コンジュゲートにおける抗体1分子あたりの平均薬物結合数が、3~5である、請求項1~38のいずれか1項に記載の抗体―薬物コンジュゲート。
- 重鎖がN-結合への糖鎖付加、O-結合への糖鎖付加、N末のプロセッシング、C末のプロセッシング、脱アミド化、アスパラギン酸の異性化、メチオニンの酸化、N末にメチオニン残基の付加、プロリン残基のアミド化及びカルボキシル末端において1つ又は2つのアミノ酸が欠失した重鎖からなる群より選択される1又は2以上の修飾を含む抗体である、請求項1~40のいずれか1項に記載の抗体―薬物コンジュゲート。
- 重鎖のカルボキシル末端のリジン残基が欠失した、請求項1~41のいずれか1項に記載の抗体―薬物コンジュゲート。
- 以下の工程:
i)配列番号4に記載のアミノ酸配列を含むアミノ酸配列に特異的に結合し、細胞内に取り込まれる内在化能を有する、IgG抗体又は当該抗体の機能性断片を製造する工程、
ii)工程i)で得られた抗体を加水分解酵素で処理し、(Fucα1,6)GlcNAc-抗体を製造する工程、及び、
iii)-1 MSG(9)又はSG(10)のシアル酸の2位のカルボン酸のカルボニル基にアジド基を有するPEGリンカーを導入し、還元末端をオキサゾリン化して得た糖鎖ドナー分子と、糖転移酵素存在下で(Fucα1,6)GlcNAc-抗体を反応させる工程、又は、
iii)-2 α-アミノ基が保護されていてもよい(MSG-)Asn又は(SG-)Asnのシアル酸の2位のカルボン酸のカルボニル基及び前記Asnのカルボン酸のカルボニル基にアジド基を有するPEGリンカーを導入し、加水分解酵素を作用させた後、還元末端をオキサゾリン化して得た糖鎖ドナー分子と、糖転移酵素存在下で(Fucα1,6)GlcNAc-抗体を反応させる工程、
を含む、糖鎖リモデリング抗体の製造方法。 - 請求項43に記載の方法により得られた糖鎖リモデリング抗体とドラッグリンカーを反応させる工程を含む、請求項1~42のいずれか1項に記載の抗体-薬物コンジュゲートの製造方法。
- 請求項44に記載の方法で製造された、請求項1~42のいずれか1項に記載の抗体-薬物コンジュゲート。
- 配列番号12に記載のアミノ酸配列からなるCDRL1、配列番号13に記載のアミノ酸配列からなるCDRL2及び配列番号14に記載のアミノ酸配列からなるCDRL3を含む軽鎖可変領域、及び、配列番号57に記載のアミノ酸配列からなるCDRH1、配列番号58に記載のアミノ酸配列からなるCDRH2及び配列番号59に記載のアミノ酸配列からなるCDRH3を含む重鎖可変領域を含む、抗体又はその機能性断片。
- 配列番号12に記載のアミノ酸配列からなるCDRL1、配列番号13に記載のアミノ酸配列からなるCDRL2及び配列番号14に記載のアミノ酸配列からなるCDRL3を含む軽鎖可変領域、及び、配列番号62に記載のアミノ酸配列からなるCDRH1、配列番号63に記載のアミノ酸配列からなるCDRH2及び配列番号64に記載のアミノ酸配列からなるCDRH3を含む重鎖可変領域を含む、抗体又はその機能性断片。
- 配列番号33に記載のアミノ酸配列からなる軽鎖可変領域及び配列番号55に記載のアミノ酸配列からなる重鎖可変領域を含む、請求項46に記載の抗体又はその機能性断片。
- 配列番号33に記載のアミノ酸配列からなる軽鎖可変領域及び配列番号60に記載のアミノ酸配列からなる重鎖可変領域を含む、請求項47に記載の抗体又はその機能性断片。
- 配列番号31の21~233番目のアミノ酸配列からなる軽鎖及び配列番号67の20~471番目のアミノ酸配列からなる重鎖を有する、請求項46又は48に記載の抗体又はその機能性断片。
- 配列番号31の21~233番目のアミノ酸配列からなる軽鎖及び配列番号69の20~471番目のアミノ酸配列からなる重鎖を有する、請求項47又は49に記載の抗体又はその機能性断片。
- 配列番号31の21~233番目のアミノ酸配列からなる軽鎖及び配列番号65の20~471番目のアミノ酸配列からなる重鎖を有する、抗体又はその機能性断片。
- 請求項46~52のいずれか1項に記載の抗体をコードするポリヌクレオチド。
- 請求項53に記載のポリヌクレオチドを含有する発現ベクター。
- 請求項54に記載の発現ベクターにより形質転換された宿主細胞。
- 請求項55に記載の宿主細胞を培養する工程、及び当該工程で得られた培養物から目的の抗体を採取する工程を含む、請求項46~52に記載の抗体又は該抗体の機能性断片の製造方法。
- 請求項56に記載の製造方法により得られる、抗体又は該抗体の機能性断片。
- 請求項1~42若しくは45のいずれか1項に記載の抗体-薬物コンジュゲート、又は、請求項46~52若しくは57のいずれか1項に記載の抗体又は該抗体の機能性断片を含む、医薬組成物。
- 抗腫瘍薬である、請求項58に記載の医薬組成物。
- 腫瘍がCDH6が発現している腫瘍である、請求項59に記載の医薬組成物。
- 腫瘍が腎細胞癌、腎淡明細胞癌、乳頭状腎細胞癌、卵巣癌、卵巣漿液性腺癌、甲状腺癌、胆管癌、肺癌、小細胞肺癌、非小細胞肺癌、神経膠芽腫、中皮腫、子宮癌、膵臓癌、ウィルムス腫瘍又は神経芽腫である、請求項60に記載の医薬組成物。
- 請求項1~42若しくは45のいずれか1項に記載の抗体-薬物コンジュゲート、請求項46~52若しくは57のいずれか1項に記載の抗体又は該抗体の機能性断片、又は、請求項58~61のいずれか1項に記載の医薬組成物を個体に投与する工程を含む、腫瘍の治療方法。
- 腫瘍がCDH6が発現している腫瘍である、請求項62に記載の治療方法。
- 腫瘍が、腎細胞癌、腎淡明細胞癌、乳頭状腎細胞癌、卵巣癌、卵巣漿液性腺癌、甲状腺癌、胆管癌、肺癌、小細胞肺癌、非小細胞肺癌、神経膠芽腫、中皮腫、子宮癌、膵臓癌、ウィルムス腫瘍又は神経芽腫である、請求項62又は63に記載の治療方法。
- 請求項1~42若しくは45のいずれか1項に記載の抗体-薬物コンジュゲート、請求項46~52若しくは57のいずれか1項に記載の抗体又は該抗体の機能性断片、又は、請求項58~61のいずれか1項に記載の医薬組成物と少なくとも一つの抗腫瘍薬を、同時に、別々に又は連続して個体に投与する工程を含む、請求項62~64のいずれか1項に記載の治療方法。
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AU2019379418A AU2019379418A1 (en) | 2018-11-14 | 2019-11-13 | Anti-CDH6 antibody-pyrrolobenzodiazepine derivative conjugate |
CN201980075343.5A CN113166764B (zh) | 2018-11-14 | 2019-11-13 | 抗cdh6抗体-吡咯并苯并二氮杂环庚三烯衍生物缀合物 |
KR1020217014567A KR20210091711A (ko) | 2018-11-14 | 2019-11-13 | 항 cdh6 항체-피롤로벤조디아제핀 유도체 컨쥬게이트 |
US17/293,577 US20220016257A1 (en) | 2018-11-14 | 2019-11-13 | Anti-cdh6 antibody-pyrrolobenzodiazepine derivative conjugate |
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BR112021009251-0A BR112021009251A2 (pt) | 2018-11-14 | 2019-11-13 | conjugado anticorpo-fármaco, anticorpo ou um fragmento funcional do mesmo, polinucleotídeo, vetor de expressão, célula hospedeira, composição farmacêutica, e, métodos para produção de um anticorpo com glicano remodelado, de um conjugado anticorpo-fármaco, do anticorpo ou um fragmento funcional do mesmo e para tratamento de um tumor. |
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EP3950061A4 (en) * | 2019-03-25 | 2022-11-16 | Daiichi Sankyo Company, Limited | ANTIBODY PYRROLOBENZODIAZEPINE DERIVATIVE CONJUGATE |
EP3949988A4 (en) * | 2019-03-27 | 2022-11-16 | Daiichi Sankyo Company, Limited | COMBINATION OF AN ANTIBODY-DERIVATIVE CONJUGATE OF PYRROLOBENZODIAZEPINE AND A PARP INHIBITOR |
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WO2023100829A1 (ja) | 2021-11-30 | 2023-06-08 | 第一三共株式会社 | プロテアーゼ分解性マスク抗体 |
WO2023153442A1 (ja) | 2022-02-09 | 2023-08-17 | 第一三共株式会社 | 環境応答性マスク抗体及びその利用 |
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