WO2022019259A1 - 抗her2抗体-薬物コンジュゲートとher二量体化阻害剤の組み合わせ - Google Patents
抗her2抗体-薬物コンジュゲートとher二量体化阻害剤の組み合わせ Download PDFInfo
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- WO2022019259A1 WO2022019259A1 PCT/JP2021/026932 JP2021026932W WO2022019259A1 WO 2022019259 A1 WO2022019259 A1 WO 2022019259A1 JP 2021026932 W JP2021026932 W JP 2021026932W WO 2022019259 A1 WO2022019259 A1 WO 2022019259A1
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Definitions
- the present invention comprises a pharmaceutical composition comprising a particular anti-HER2 antibody-drug conjugate and a HER dimerization inhibitor administered in combination and / or a particular anti-HER2 antibody-drug conjugate. And HER dimerization inhibitor are combined and administered to an individual.
- HER2 Human epidermal growth factor receptor 2
- Non-Patent Documents 1 to 6 Human epidermal growth factor receptor 2
- HER2 is overexpressed in various cancer types such as breast cancer and gastric cancer (Non-Patent Documents 7 to 12), and has been reported to be a negative prognostic factor in breast cancer (Non-Patent Documents 13 and 14).
- trastuzumab As anti-HER2 antibodies, trastuzumab (Patent Document 1), pertuzumab (Patent Document 2) and the like are known.
- Trastuzumab is known to bind to subdomain IV of the extracellular domain of the HER2 protein.
- pertuzumab is known to bind to subdomain II of the extracellular domain of the HER2 protein. Thereby, pertuzumab inhibits the dimerization of HER2 protein and HER3 protein, phosphorylation of HER2 by ligand stimulation, and activation of both PI3K-Akt and MAPK kinases located downstream thereof. It is thought to suppress cell proliferation. For this reason, pertuzumab is known as a HER dimerization inhibitor.
- Trastuzumab is known to exert a more excellent antitumor effect when used in combination with pertuzumab (Non-Patent Documents 15 and 16).
- An antibody-drug conjugate in which a drug having cytotoxicity is bound to an antibody that binds to an antigen that is expressed on the surface of cancer cells and can be internalized in the cells, is selected for cancer cells.
- ADC antibody-drug conjugate
- antibody-drug conjugates having an anti-HER2 antibody and a derivative of exatecan, which is a topoisomerase I inhibitor, as components are known (Patent Documents 3 to 6, Non-Patent Documents 22 to 22). 25).
- a combination study of an anti-HER2 antibody-drug conjugate and a HER dimerization inhibitor is being conducted with the expectation of antitumor effects such as the combination therapy of trastuzumab and pertuzumab (Oncol Rep. 2013 Sep; 30 (Oncol Rep. 2013 Sep; 30). 3): See 1087-93 and Clin Cancer Res. 2014 Jan 15; 20 (2): 456-68 etc.).
- trastuzumab emtansine which is an anti-HER2 antibody-drug conjugate
- pertuzumab Oncotarget. 2018 Aug 7; 9 (61): 31915. See -31919 etc.
- the present invention comprises a pharmaceutical composition comprising a particular anti-HER2 antibody-drug conjugate and a HER dimerization inhibitor administered in combination and / or the anti-HER2 antibody-drug conjugate. It is an object of the present invention to provide a therapeutic method characterized in that a HER dimerization inhibitor is combined and administered to an individual.
- the present invention provides the following [1] to [100].
- a pharmaceutical composition comprising an anti-HER2 antibody-drug conjugate and a HER dimerization inhibitor administered in combination.
- the anti-HER2 antibody-drug conjugate is formulated
- a pharmaceutical composition which is an anti-HER2 antibody-drug conjugate in which a drug linker shown in (1) and an anti-HER2 antibody are bound by a thioether bond.
- the anti-HER2 antibody is a heavy chain containing CDRH1 consisting of the amino acid sequence set forth in SEQ ID NO: 3, CDRH2 consisting of the amino acid sequence set forth in SEQ ID NO: 4, and CDRH3 consisting of the amino acid sequence set forth in SEQ ID NO: 5, and SEQ ID NO:
- An antibody comprising CDRL1 consisting of the amino acid sequence set forth in 6; CDRL2 consisting of the amino acid sequences set forth in amino acids 1 to 3 in SEQ ID NO: 7, and a light chain comprising CDRL3 consisting of the amino acid sequence set forth in SEQ ID NO: 8.
- the anti-HER2 antibody is an antibody comprising a heavy chain containing a heavy chain variable region consisting of the amino acid sequence set forth in SEQ ID NO: 9 and a light chain containing a light chain variable region consisting of the amino acid sequence set forth in SEQ ID NO: 10.
- anti-HER2 antibody is an antibody comprising a heavy chain consisting of the amino acid sequence set forth in SEQ ID NO: 11 and a light chain consisting of the amino acid sequence set forth in SEQ ID NO: 2.
- n indicates the average number of bindings of the drug linker per antibody, where n is in the range of 7 to 8).
- the anti-HER2 antibody-drug conjugate and the HER dimerization inhibitor are contained as active ingredients in different pharmaceuticals, respectively, and are administered simultaneously or at different times, from [1] to [9].
- the pharmaceutical composition according to. [12] The pharmaceutical composition according to any one of [1] to [11] for treating cancer.
- Cancers are breast cancer, stomach cancer, colon cancer, lung cancer, esophageal cancer, head and neck cancer, gastroesophageal junction adenocarcinoma, biliary tract cancer, paget disease, pancreatic cancer, ovarian cancer, uterine cancer Sarcoma, bladder cancer, prostate cancer, urinary tract epithelial cancer, gastrointestinal stromal tumor, cervical cancer, squamous epithelial cancer, peritoneal cancer, liver cancer, hepatocellular carcinoma, uterine body cancer, Selected from the group consisting of renal cancer, genital pudendal cancer, thyroid cancer, penis cancer, leukemia, malignant lymphoma, plasmacytoma, myeloma, polymorphic glioblastoma, sarcoma, osteosarcoma, and melanoma.
- Cancers are breast cancer, stomach cancer, colon cancer, lung cancer, esophageal cancer, head and neck cancer, gastroesophageal junction adenocarcinoma, biliary tract cancer, paget disease, pancreatic cancer, ovarian cancer, uterine cancer
- the pharmaceutical composition according to [12], wherein the cancer is breast cancer.
- a cancer having a low HER2 expression is a cancer in which the expression of HER2 is determined to be 2+ by the immunohistochemistry method and the expression of HER2 is determined to be negative by the in situ hybridization method.
- Composition [21] The pharmaceutical composition according to [19], wherein the cancer having a low expression of HER2 is a cancer in which the expression of HER2 is determined to be 1+ by an immunohistochemical method.
- the cancer having low HER2 expression is a cancer in which the expression of HER2 is determined to be> 0 and ⁇ 1+ by immunohistochemistry.
- the anti-HER2 antibody is a heavy chain containing CDRH1 consisting of the amino acid sequence set forth in SEQ ID NO: 3, CDRH2 consisting of the amino acid sequence set forth in SEQ ID NO: 4, and CDRH3 consisting of the amino acid sequence set forth in SEQ ID NO: 5, and SEQ ID NO:
- An antibody comprising CDRL1 consisting of the amino acid sequence set forth in 6; CDRL2 consisting of the amino acid sequences set forth in amino acids 1 to 3 in SEQ ID NO: 7, and a light chain comprising CDRL3 consisting of the amino acid sequence set forth in SEQ ID NO: 8.
- the anti-HER2 antibody is an antibody comprising a heavy chain containing a heavy chain variable region consisting of the amino acid sequence set forth in SEQ ID NO: 9 and a light chain containing a light chain variable region consisting of the amino acid sequence set forth in SEQ ID NO: 10.
- anti-HER2 antibody is an antibody comprising a heavy chain consisting of the amino acid sequence set forth in SEQ ID NO: 11 and a light chain consisting of the amino acid sequence set forth in SEQ ID NO: 2.
- n indicates the average number of bindings of the drug linker per antibody, where n is in the range of 7 to 8).
- Cancers are breast cancer, stomach cancer, colon cancer, lung cancer, esophageal cancer, head and neck cancer, gastroesophageal junction adenocarcinoma, biliary tract cancer, paget disease, pancreatic cancer, ovarian cancer, uterine cancer Sarcoma, bladder cancer, prostate cancer, urinary tract epithelial cancer, gastrointestinal stromal tumor, cervical cancer, squamous epithelial cancer, peritoneal cancer, liver cancer, hepatocellular carcinoma, uterine body cancer, Selected from the group consisting of renal cancer, genital pudendal cancer, thyroid cancer, penis cancer, leukemia, malignant lymphoma, plasmacytoma, myeloma, polymorphic glioblastoma, sarcoma, osteosarcoma, and melanoma.
- Cancers are breast cancer, stomach cancer, colon cancer, lung cancer, esophageal cancer, head and neck cancer, gastroesophageal junction adenocarcinoma, biliary tract cancer, paget disease, pancreatic cancer, ovarian cancer, uterine cancer 37.
- the treatment method according to [37], wherein the cancer is breast cancer.
- the treatment method according to any one of [37] to [40], wherein the cancer is a cancer overexpressing HER2.
- the anti-HER2 antibody is a heavy chain containing CDRH1 consisting of the amino acid sequence set forth in SEQ ID NO: 3, CDRH2 consisting of the amino acid sequence set forth in SEQ ID NO: 4, and CDRH3 consisting of the amino acid sequence set forth in SEQ ID NO: 5, and SEQ ID NO:
- the anti-HER2 antibody is an antibody comprising a heavy chain containing a heavy chain variable region consisting of the amino acid sequence set forth in SEQ ID NO: 9 and a light chain containing a light chain variable region consisting of the amino acid sequence set forth in SEQ ID NO: 10.
- n indicates the average number of bindings of the drug linker per antibody, where n is in the range of 7 to 8).
- the anti-HER2 antibody-drug conjugate and the HER dimerization inhibitor are contained as active ingredients in different pharmaceuticals, respectively, and are administered simultaneously or at different times, from [51] to [59]. ].
- Cancers are breast cancer, stomach cancer, colon cancer, lung cancer, esophageal cancer, head and neck cancer, gastroesophageal junction adenocarcinoma, biliary tract cancer, paget disease, pancreatic cancer, ovarian cancer, uterine cancer Sarcoma, bladder cancer, prostate cancer, urinary tract epithelial cancer, gastrointestinal stromal tumor, cervical cancer, squamous epithelial cancer, peritoneal cancer, liver cancer, hepatocellular carcinoma, uterine body cancer, Selected from the group consisting of renal cancer, genital pudendal cancer, thyroid cancer, penis cancer, leukemia, malignant lymphoma, plasmacytoma, myeloma, polymorphic glioblastoma, sarcoma, osteosarcoma, and melanoma.
- Cancers are breast cancer, stomach cancer, colon cancer, lung cancer, esophageal cancer, head and neck cancer, gastroesophageal junction adenocarcinoma, biliary tract cancer, paget disease, pancreatic cancer, ovarian cancer, uterine cancer
- the anti-HER2 antibody-drug conjugate according to [62] wherein the cancer is breast cancer.
- HER2 antibody-drug conjugate wherein the HER2 overexpressing cancer is a cancer in which the expression of HER2 is determined to be 2+ by the immunohistochemistry method and the expression of HER2 is determined to be positive by the in situ hybridization method.
- HER2 antibody-drug conjugate [71] The anti-HER2 antibody-drug conjugate according to [69], wherein the cancer with low HER2 expression is a cancer whose expression of HER2 is determined to be 1+ by immunohistochemistry.
- the anti-HER2 antibody is a heavy chain containing CDRH1 consisting of the amino acid sequence set forth in SEQ ID NO: 3, CDRH2 consisting of the amino acid sequence set forth in SEQ ID NO: 4, and CDRH3 consisting of the amino acid sequence set forth in SEQ ID NO: 5, and SEQ ID NO:
- An antibody comprising CDRL1 consisting of the amino acid sequence set forth in 6; CDRL2 consisting of the amino acid sequences set forth in amino acids 1 to 3 in SEQ ID NO: 7, and a light chain comprising CDRL3 consisting of the amino acid sequence set forth in SEQ ID NO: 8.
- the anti-HER2 antibody is an antibody comprising a heavy chain containing a heavy chain variable region consisting of the amino acid sequence set forth in SEQ ID NO: 9 and a light chain containing a light chain variable region consisting of the amino acid sequence set forth in SEQ ID NO: 10. Yes, the use described in [76].
- anti-HER2 antibody is an antibody comprising a heavy chain consisting of the amino acid sequence set forth in SEQ ID NO: 11 and a light chain consisting of the amino acid sequence set forth in SEQ ID NO: 2.
- n indicates the average number of bindings of the drug linker per antibody, where n is in the range of 7 to 8).
- the HER dimerization inhibitor is an antibody that binds to subdomain II of the extracellular domain of the HER2 protein.
- Cancers are breast cancer, stomach cancer, colon cancer, lung cancer, esophageal cancer, head and neck cancer, gastroesophageal junction adenocarcinoma, biliary tract cancer, paget disease, pancreatic cancer, ovarian cancer, uterine cancer Sarcoma, bladder cancer, prostate cancer, urinary tract epithelial cancer, gastrointestinal stromal tumor, cervical cancer, squamous epithelial cancer, peritoneal cancer, liver cancer, hepatocellular carcinoma, uterine body cancer, Selected from the group consisting of renal cancer, genital pudendal cancer, thyroid cancer, penis cancer, leukemia, malignant lymphoma, plasmacytoma, myeloma, polymorphic glioblastoma, sarcoma, osteosarcoma, and melanoma.
- Cancers are breast cancer, stomach cancer, colon cancer, lung cancer, esophageal cancer, head and neck cancer, gastroesophageal junction adenocarcinoma, biliary tract cancer, paget disease, pancreatic cancer, ovarian cancer, uterine cancer
- the use according to [87], wherein the cancer is breast cancer.
- the use according to any one of [87] to [90], wherein the cancer is a cancer overexpressing HER2.
- a cancer having a low HER2 expression is a cancer in which the expression of HER2 is determined to be 2+ by the immunohistochemistry method and the expression of HER2 is determined to be negative by the in situ hybridization method. ..
- a cancer with low HER2 expression is a cancer in which HER2 expression is determined to be 1+ by immunohistochemistry.
- the cancer with low HER2 expression is a cancer in which the expression of HER2 is determined to be> 0 and ⁇ 1+ by immunohistochemistry.
- a pharmaceutical composition comprising a specific anti-HER2 antibody-drug conjugate and a HER dimerization inhibitor to be administered in combination, and / or a specific anti-HER2 antibody-drug conjugate.
- HER dimerization inhibitors can be combined to provide a therapeutic method characterized by administration to an individual.
- the amino acid sequence (SEQ ID NO: 1) of the anti-HER2 antibody heavy chain is shown.
- the amino acid sequence (SEQ ID NO: 2) of the anti-HER2 antibody light chain is shown.
- the amino acid sequence (SEQ ID NO: 3) of CDRH1 of the anti-HER2 antibody is shown.
- the amino acid sequence (SEQ ID NO: 4) of CDRH2 of the anti-HER2 antibody is shown.
- the amino acid sequence (SEQ ID NO: 5) of CDRH3 of the anti-HER2 antibody is shown.
- the amino acid sequence (SEQ ID NO: 6) of CDRL1 of the anti-HER2 antibody is shown.
- the amino acid sequence (SEQ ID NO: 7) containing the amino acid sequence (SAS) of CDRL2 of the anti-HER2 antibody is shown.
- the amino acid sequence (SEQ ID NO: 8) of CDRL3 of the anti-HER2 antibody is shown.
- the amino acid sequence (SEQ ID NO: 9) of the heavy chain variable region of the anti-HER2 antibody is shown.
- the amino acid sequence (SEQ ID NO: 10) of the light chain variable region of the anti-HER2 antibody is shown.
- the amino acid sequence (SEQ ID NO: 11) of the anti-HER2 antibody heavy chain is shown.
- the amino acid sequence of the HER2 protein (SEQ ID NO: 12) is shown.
- HER2 is synonymous with human epidermal growth factor receptor 2 (sometimes called neu, ErbB-2), HER1 (EGFR, ErbB-1), HER3 (ErbB-3). And HER4 (ErbB-4), a transmembrane receptor belonging to the epidermal growth factor receptor (EGFR) subfamily of the receptor protein tyrosine kinase.
- EGFR epidermal growth factor receptor
- HER2 plays an important role in cell proliferation, differentiation, and survival in normal cells and tumor cells by autophosphorylating and activating intracellular tyrosine residues by heterodimer formation with HER1, HER3, or HER4. It is known to play.
- HER2 protein is used in the same meaning as HER2.
- Expression of the HER2 protein can be detected using methods well known to those of skill in the art, such as the immunohistochemistry (IHC) method.
- IHC immunohistochemistry
- the amino acid sequence of the HER2 protein is shown in SEQ ID NO: 12 (FIG. 12).
- SEQ ID NO: 12 the amino acid sequence set forth in amino acids 1 to 652 is referred to as "the extracellular domain of HER2 protein", and the amino acid sequence set forth in amino acid numbers 653 to 675 is referred to as "transmembrane domain of HER2 protein".
- the amino acid sequence of numbers 676 to 1255 is referred to as the "intracellular domain of the HER2 protein".
- the "subdomain II of the extracellular domain of the HER2 protein” indicates the amino acid sequence set forth in amino acid numbers 162 to 342 in SEQ ID NO: 12.
- the "subdomain IV of the extracellular domain of the HER2 protein” indicates the amino acid sequence set forth in amino acid numbers 475 to 641 in SEQ ID NO: 12.
- HER2 gene is synonymous with human epidermal growth factor receptor type 2 related oncogene.
- the HER2 protein is one of the gene products of the HER2 gene.
- the nucleotide sequence of the HER2 gene (cDNA) is shown in SEQ ID NO: 13.
- the "anti-HER2 antibody” is an antibody having an activity of specifically binding to HER2 and preferably having an activity to be internalized in HER2-expressing cells by binding to HER2, in other words, after binding to HER2.
- An antibody having an activity of migrating into HER2-expressing cells is shown.
- cancer and “tumor” are used interchangeably.
- Anti-HER2 antibody-drug conjugate The anti-HER2 antibody-drug conjugate used in the present invention is of the formula.
- A indicates the binding position with the anti-HER2 antibody
- the partial structure composed of the linker and the drug is referred to as "drug linker".
- This drug linker is a thiol group (in other words, a sulfur atom of a cysteine residue) generated at a disulfide bond site between antibody chains (two heavy chains-between heavy chains and two heavy chains-between light chains). Is bound to.
- the drug linker of the present invention is exatecan (IUPAC name: (1S, 9S) -1-amino-9-ethyl-5-fluoro-1,2,3,9,12,15-hexahydro-, which is a topoisomerase I inhibitor.
- camptothecin derivative having an antitumor effect, which is shown in.
- the anti-HER2 antibody-drug conjugate used in the present invention can also be expressed by the following equation.
- n is synonymous with the so-called average number of drug bonds (DAR; Drug-to-Antibody Ratio), and indicates the average number of drug linkers bound per antibody.
- the average number of drug linker bindings per antibody of the anti-HER2 antibody-drug conjugate used in the present invention is preferably 2 to 8, more preferably 3 to 8, and even more preferably. It is 7 to 8, more preferably 7.5 to 8, and even more preferably about 8.
- the anti-HER2-antibody-drug conjugate used in the present invention has a linker moiety cleaved after being transferred into tumor cells, and the formula is
- the above compound is considered to be the main body of the antitumor activity of the above anti-HER2 antibody-drug conjugate used in the present invention, and has been confirmed to have a topoisomerase I inhibitory action (Ogitani Y. et al). ., Clinical Cancer Research, 2016, Oct 15; 22 (20): 5097-5108, Epub 2016 Mar 29).
- the anti-HER2-antibody-drug conjugate used in the present invention is also known to have a bystander effect (Ogitani Y. et al., Cancer Science (2016) 107, 1039-1046). This bystander effect is due to the anti-HER2 antibody-drug conjugate used in the present invention being internalized in the target-expressing cancer cells, and then the above compound is applied to nearby cancer cells not expressing the target. Is also exerted by exerting an antitumor effect.
- the anti-HER2-antibody-drug conjugate used in the present invention can be manufactured with reference to the description of International Publication No. 2015/115091 and the like.
- the anti-HER2 antibody used in the present invention-the anti-HER2 antibody in the drug conjugate preferably comprises the amino acid sequence set forth in SEQ ID NO: 3 (amino acid sequence set forth in amino acids 26 to 33 in SEQ ID NO: 1). , CDRH2 consisting of the amino acid sequence set forth in SEQ ID NO: 4 (amino acid sequence set forth in amino acid numbers 51 to 58 in SEQ ID NO: 1), and the amino acid sequence set forth in SEQ ID NO: 5 (amino acid numbers 97 to 109 in SEQ ID NO: 1).
- CDRL1 consisting of the amino acid sequence set forth in SEQ ID NO: 6 (amino acid sequence set forth in amino acids 27 to 32 in SEQ ID NO: 2), and amino acid numbers 1 to 7 in SEQ ID NO: 7.
- CDRL2 consisting of the amino acid sequence set forth in 3 (amino acid sequence set forth in amino acid numbers 50 to 52 in SEQ ID NO: 2) and the amino acid sequence set forth in SEQ ID NO: 8 (amino acid sequence set forth in amino acid numbers 89 to 97 in SEQ ID NO: 2).
- a heavy chain containing a heavy chain variable region consisting of the amino acid sequence set forth in SEQ ID NO: 9 amino acid sequence set forth in amino acid numbers 1 to 120 in SEQ ID NO: 1
- an antibody comprising a heavy chain consisting of the amino acid sequence set forth in SEQ ID NO: 1 and a light chain consisting of the amino acid sequence set forth in SEQ ID NO: 2 or the amino acid sequence set forth in SEQ ID NO: 11
- SEQ ID NO: 1 is an antibody comprising a heavy chain consisting of the amino acid sequence according to amino acid numbers 1 to 449) and a light chain consisting of the amino acid sequence shown in SEQ ID NO: 2.
- the anti-HER2-antibody-drug conjugate used in the present invention is preferably Trastuzumab Deluxtecan.
- the HER2 protein used in the present invention is directly purified from HER2-expressing cells of humans and non-human mammals (rats, mice, etc.) and used, or a cell membrane fraction of the cells is prepared. It can be used and can also be obtained by synthesizing HER2 in vitro or by genetically manipulating it into host cells. In genetic manipulation, specifically, the HER2 cDNA is incorporated into an expressible vector and then synthesized in a solution containing enzymes, substrates and energy substances required for transcription and translation, or other prokaryotes, or true. The protein can be obtained by transforming a prokaryotic host cell to express HER2. It is also possible to use the HER2-expressing cell by the above-mentioned genetic manipulation or the cell line expressing HER2 as the HER2 protein.
- the DNA sequence and amino acid sequence of HER2 are published on a public database, and can be referred to by accession numbers such as M11730 (Genbank) and NP_004439.2 (NCBI), for example.
- HER2 a protein consisting of an amino acid sequence in which one or several amino acids are substituted, deleted and / or added, and having the same biological activity as the protein is also included in HER2.
- the human HER2 protein is composed of a signal sequence consisting of 22 amino acid residues at the N-terminal, an extracellular domain consisting of 630 amino acid residues, a transmembrane domain consisting of 23 amino acid residues, and an intracellular domain consisting of 580 amino acid residues. ..
- the anti-HER2 antibody used in the present invention can be obtained by known means. For example, using a method commonly practiced in the art, immunizing an animal with any polypeptide selected from the antigenic HER2 or the amino acid sequence of HER2, and collecting and purifying the antibody produced in vivo. Can be obtained by.
- the origin of the antigen is not limited to humans, and it is also possible to immunize an animal with an antigen derived from a non-human animal such as a mouse or a rat.
- the anti-HER2 antibody applicable to human diseases can be selected by testing the crossover between the obtained antibody that binds to the heterologous antigen and the human antigen.
- a monoclonal antibody can also be obtained by fusing an antibody-producing cell that produces an antibody against an antigen with a myeloma cell to establish a hybrid domine.
- the 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 an 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 method of immunizing an animal with an antigen-expressing cell or a cell line expressing an antigen by the above-mentioned genetic manipulation.
- the anti-HER2 antibody used in the present invention is a recombinant antibody, for example, a chimeric antibody or a humanized antibody, which has been artificially modified for the purpose of reducing heterologous antigenicity to humans. It is preferably present, or an antibody having only the gene sequence of a human-derived antibody, that is, a human antibody is preferable. These antibodies 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 bonded to the constant region derived from human (Proc. Natl. Acad). . Sci. USA, 81, 6851-6855, (1984)).
- an antibody (Nature (1986) 321, p.522-525) in which only the complementarity determination region (CDR) of a heterologous antibody is incorporated into a human-derived antibody, and heterologous by the CDR transplantation method.
- CDR complementarity determination region
- the antibody International Publication No. 90/07861 in which the amino acid residue of a part of the framework of the heterologous antibody was also transplanted into the human antibody, the gene conversion mutation strategy. Examples of the antibody used and humanized (US Pat. No. 5,821,337) can be mentioned.
- human antibodies antibodies produced using human antibody-producing mice having human chromosomal fragments containing the heavy and light chain genes of human antibodies (Tomizuka, K. et al., Nature Genetics (1997) 16, p. 133-143; Kuroiwa, Y. et. Al., Nucl. Acids Res. (1998) 26, p.3447-3448; Yoshida, H. et. Al., Animal Cell Technology: Basic and Applied Aspects vol.10, p.69-73 (Kitagawa, Y., Matsuda, T. and Iijima, S. eds.), Kluwer Academic Publishers, 1999; Tomizuka, K. et. Al., Proc. Natl.
- antibodies obtained by phage display selected from a human antibody library (Wormstone, I. M. 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. See.) Can also be mentioned.
- the anti-HER2 antibody used in the present invention also includes a modified antibody.
- the modified product means an antibody according to the present invention that has been chemically or biologically modified.
- Chemical modifications include those having a chemical moiety attached to the amino acid skeleton, an N-linked or an O-linked carbohydrate chain having a chemical moiety attached, and the like.
- Biological modifications include post-translational modifications (eg, N-terminal or O-linked sugar chain addition, N-terminal or C-terminal processing, deamidation, aspartic acid isomerization, methionine oxidation, etc. ), Those with a methionine residue added to the N-terminal by expression using a prokaryotic host cell, and the like.
- those labeled to enable the detection or isolation of the anti-HER2 antibody or antigen used in the present invention for example, an enzyme-labeled substance, a fluorescent-labeled substance, and an affinity-labeled substance are also included in the meaning of such modified substances. Is done.
- Such a modified form of the anti-HER2 antibody used in the present invention is useful for improving the stability and retention of the antibody, reducing the antigenicity, detecting or isolating the antibody or the antigen, and the like.
- the anti-HER2 antibody used in the present invention also includes an antibody in which the sugar chain modification is adjusted.
- the anti-HER2 antibody used in the present invention also includes the modified antibody and a functional fragment of the antibody, and is a deletion substance lacking 1 or 2 amino acids at the heavy chain carboxyl terminus, and
- the amidated deletion agent for example, a heavy chain in which the proline residue at the carboxyl-terminal site is amidated
- the deletion of the carboxyl end of the heavy chain of the anti-HER2 antibody used in the present invention is not limited to the above types.
- the two heavy chains constituting the anti-HER2 antibody used in the present invention may be any one of the heavy chains selected from the group consisting of the full length and the above-mentioned deletions, or any two.
- the amount ratio of each deletion substance can be affected by the type and culture conditions of cultured mammalian cells producing the anti-HER2 antibody used in the present invention, but the anti-HER2 antibody used in the present invention is preferably 2 It can be mentioned that both of the heavy chains of a book lack one amino acid residue at the carboxyl end.
- Examples of the isotype of the anti-HER2 antibody used in the present invention include IgG (IgG1, IgG2, IgG3, IgG4), and preferably IgG1 or IgG2. Further, these variants can also be used as the anti-HER2 antibody according to the present invention.
- the above drug linker intermediate is N- [6- (2,5-dioxo-2,5-dihydro-1H-pyrrole-1-yl) hexanoyl] glycylglycyl-L-phenylalanyl-N-[(2-2-yl).
- the anti-HER2 antibody-drug conjugate used in the present invention can be produced by reacting the above-mentioned drug linker intermediate with an anti-HER2 antibody having a thiol group (also referred to as a sulfhydryl group).
- An anti-HER2 antibody having a sulfhydryl group can be obtained by a method well known to those skilled in the art (Hermanson, G.T., Bioconjugate Techniques, pp.56-136, pp.456-493, Academic Press (1996)).
- a reducing agent such as Tris (2-carboxyethyl) phosphine hydrochloride (TCEP) is used in an amount of 0.3 to 3 molar equivalents per antibody interchain disulfide, and a chelate such as ethylenediamine tetraacetic acid (EDTA) is used.
- TCEP Tris (2-carboxyethyl) phosphine hydrochloride
- EDTA ethylenediamine tetraacetic acid
- the average number of drug bonds per antibody molecule of the produced anti-HER2 antibody-drug conjugate is calculated, for example, by measuring the UV absorbance of the anti-HER2 antibody-drug conjugate and its conjugate precursor at two wavelengths of 280 nm and 370 nm. It can be calculated by the method (UV method) or the method of quantifying and calculating each fragment obtained by treating the antibody-drug conjugate with a reducing agent by HPLC measurement (HPLC method).
- the conjugation of the anti-HER2 antibody and the drug linker intermediate and the calculation of the average number of drug bonds per antibody of the anti-HER2 antibody-drug conjugate can be carried out with reference to the description of International Publication No. 2015/115091 and the like. can.
- the "HER dimerization inhibitor” means an agent that inhibits the formation of a heterodimer between HER2 and HER1, HER3, or HER4 by binding to the HER2 protein. do.
- the HER dimerization inhibitor in the present invention is not limited as long as it is a drug having the above-mentioned function, but preferably, an antibody that binds to subdomain II of the extracellular domain of the HER2 protein can be mentioned. More preferably, pertuzumab can be mentioned.
- the anti-HER2 antibody-drug conjugate and the HER dimerization inhibitor are contained as active ingredients in different formulations, and are administered simultaneously or at different times.
- the anti-HER2 antibody-drug conjugate and the HER dimerization inhibitor are contained and administered as an active ingredient in a single preparation. It may be.
- the pharmaceutical composition and therapeutic method of the present invention are characterized in that they exhibit a significantly superior antitumor effect than the single administration of an anti-HER2 antibody-drug conjugate. This makes it possible to treat cancers that cannot be treated by single administration of the anti-HER2 antibody-drug conjugate. Further, the pharmaceutical composition and the therapeutic method of the present invention are characterized by exhibiting a significantly superior antitumor effect as compared with the single administration of the HER dimerization inhibitor. This makes it possible to treat cancers that cannot be treated by single administration of the HER dimerization inhibitor. Furthermore, the pharmaceutical composition and therapeutic method of the present invention are characterized in that the anti-HER2 antibody-drug conjugate and the HER dimerization inhibitor exhibit a synergistic antitumor effect.
- the pharmaceutical composition and treatment method of the present invention can be used for the treatment of cancer, preferably breast cancer (including triple negative breast cancer and luminal breast cancer), gastric cancer (also referred to as gastric adenocarcinoma). Yes), colon cancer (sometimes called colon-rectal cancer, including colon cancer and rectal cancer), lung cancer (including small cell lung cancer and non-small cell lung cancer), esophageal cancer, head and neck cancer (Including salivary adenocarcinoma and pharyngeal cancer), gastroesophageal junction adenocarcinoma, biliary tract cancer (including bile duct cancer), Paget's disease, pancreatic cancer, ovarian cancer, uterine cancer sarcoma, bladder Cancer, prostate cancer, urinary tract epithelial cancer, gastrointestinal stromal tumor, cervical cancer, squamous epithelial cancer, peritoneal cancer, liver cancer, hepatocellular carcinoma, uterine body cancer, renal cancer, At least one treatment selected from the group consisting of
- the pharmaceutical composition and therapeutic method of the present invention can be suitably used for the treatment of HER2-overexpressing cancer.
- Whether or not HER2 is expressed is determined by, for example, collecting tumor tissue from a cancer patient and using a formalin-fixed paraffin-embedded sample (FFPE) by immunohistochemistry (IHC) method, flow cytometer, Western blotting, or the like. It can be confirmed by testing at the gene product (protein) level, or by testing at the transcription level of the gene by in situ hybridization method (ISH), quantitative PCR method (q-PCR), microarray analysis, etc., or It is also possible to collect acellular circulating tumor DNA (ctDNA) from a cancer patient and confirm it by inspection using a method such as next-generation sequence (NGS).
- FFPE formalin-fixed paraffin-embedded sample
- IHC immunohistochemistry
- compositions and the therapeutic method of the present invention can be suitably used not only for HER2 overexpressing cancer but also for HER2 underexpressing cancer and HER2 mutant cancer.
- the "HER2 overexpressing cancer” is not particularly limited as long as it is recognized as a HER2 overexpressing cancer by those skilled in the art, but preferably, the expression of HER2 is 3+ by immunohistochemistry.
- the determined cancer or cancer in which the expression of HER2 is determined to be 2+ by the immunohistochemistry method and the expression of HER2 is determined to be positive by the in situ hybridization method can be mentioned.
- the in situ hybridization method of the present invention includes a fluorescence in situ hybridization method (FISH) and a dual color in situ hybridization method (DISH).
- the term "HER2 low-expressing cancer” is not particularly limited as long as it is recognized by those skilled in the art as HER2-low-expressing cancer, but preferably, the expression of HER2 is 2+ by immunohistochemistry. Cancer that was determined and the expression of HER2 was negative by the in situ hybridization method, cancer that the expression of HER2 was determined to be 1+ by the immunohistochemistry method, or the expression of HER2 by the immunohistochemistry method. Cancers determined to be 0> and ⁇ 1+ can be mentioned.
- the method for determining the degree of HER2 expression by the immunohistochemistry method and the method for determining the positive or negative of HER2 expression by the in situ hybridization method are not particularly limited as long as they are recognized by those skilled in the art, but for example, HER2.
- Examination Guide Breast Cancer Edition 4th Edition created by Breast Cancer HER2 Examination Pathology Subcommittee
- the HER2 low-expressing cancer to which the pharmaceutical composition and the therapeutic method of the present invention can be used is preferably HER2-low-expressing breast cancer, HER2-low-expressing gastric cancer, HER2-low-expressing colon cancer, or HER2-low-expressing non-small cells.
- Lung cancer more preferably HER2-low-expressing breast cancer.
- HER2 mutant cancer means a cancer having a mutation in the amino acid sequence of the HER2 protein or a cancer having a mutation in the HER2 gene.
- any cancer containing cancer cells having a HER2 mutation even if the entire tumor tissue does not have the HER2 mutation is included in the HER2 mutant cancer (see International Publication No. 2019/230645, etc.).
- the HER2 mutant cancer to which the pharmaceutical composition and therapeutic method of the present invention can be used is preferably HER2 mutant non-small cell lung cancer, HER2 mutant gastric cancer, HER2 mutant breast cancer, or HER2 mutant colon cancer, and is more preferable.
- HER2 mutant non-small cell lung cancer or HER2 mutant gastric cancer is preferably HER2 mutant non-small cell lung cancer, HER2 mutant gastric cancer, HER2 mutant breast cancer, or HER2 mutant colon cancer.
- the pharmaceutical composition and therapeutic method of the present invention can be preferably used for mammals, but more preferably for humans.
- the antitumor effect of the pharmaceutical composition and the therapeutic method of the present invention is, for example, reduction of tumor volume by creating a model in which cancer cells are transplanted into a test animal and applying the pharmaceutical composition and the therapeutic method of the present invention. It can be confirmed by measuring the life-prolonging effect. Then, by comparing with the antitumor effect of each of the anti-HER2 antibody-drug conjugate and the HER dimerization inhibitor used in the present invention alone, the anti-HER2 antibody-drug conjugate used in the present invention is used. The combined effect of the gate and the HER dimerization inhibitor can be confirmed.
- the antitumor effect of the pharmaceutical composition and the therapeutic method of the present invention is confirmed in clinical trials by the Response Evolution Criteria in Solid Tumors (RECIST) evaluation method, the WHO evaluation method, the Macdonald evaluation method, the weight measurement, and other methods.
- PFS Progression-Free Survival
- OS Overall Survival
- the pharmaceutical composition and therapeutic method of the present invention can slow the growth of cancer cells, suppress their growth, and even destroy cancer cells. By these actions, it is possible to achieve relief from the symptoms caused by cancer and improvement of QOL in cancer patients, and to maintain the life of cancer patients and achieve therapeutic effects. Even if it does not lead to the destruction of cancer cells, it is possible to achieve longer-term survival while achieving higher quality of life in cancer patients by suppressing or controlling the growth of cancer cells.
- the pharmaceutical composition of the present invention can be applied as a systemic therapy to patients, and can be locally applied to cancer tissues to expect a therapeutic effect.
- the pharmaceutical composition of the present invention may contain one or more pharmaceutically compatible ingredients and be administered.
- the pharmaceutically compatible component is a pharmaceutical additive usually used in this field, depending on the dose and concentration of the anti-HER2 antibody-drug conjugate and HER dimerization inhibitor used in the present invention. It can be appropriately selected and applied from the product and others.
- the anti-HER2-antibody-drug conjugate used in the present invention can be administered as a pharmaceutical composition comprising a buffer such as a histidine buffer, an excipient such as sucrose, and a surfactant such as polysorbate 80.
- the pharmaceutical composition containing the anti-HER2 antibody-drug conjugate used in the present invention can be preferably used as an injection, and more preferably as an aqueous injection or a lyophilized injection. And more preferably, it can be used as a lyophilized injection.
- the pharmaceutical composition containing the anti-HER2 antibody-drug conjugate used in the present invention is an aqueous injection
- it can be preferably diluted with an appropriate diluted solution and then intravenously administered by intravenous drip.
- the diluting solution include a glucose solution, a physiological saline solution, and the like, preferably a glucose solution, and more preferably a 5% glucose solution.
- the pharmaceutical composition containing the anti-HER2 antibody-drug conjugate used in the present invention is a lyophilized injection, it is preferably dissolved in water for injection, diluted with an appropriate diluent, and then diluted with an appropriate diluent. It can be administered by intravenous drip.
- the diluting solution include a glucose solution, a physiological saline solution, and the like, preferably a glucose solution, and more preferably a 5% glucose solution.
- Introductory routes that can be used to administer the pharmaceutical composition of the invention include, for example, intravenous, intradermal, subcutaneous, intramuscular, and intraperitoneal routes, preferably intravenous. The route can be mentioned.
- the anti-HER2-antibody-drug conjugate used in the present invention can be administered to humans at intervals of 1 to 180 days, preferably 1 week, 2 weeks, 3 weeks, or. It can be administered at intervals of once every four weeks, and even more preferably once every three weeks.
- the anti-HER2 antibody-drug conjugate used in the present invention can be administered at a dose of about 0.001 to 100 mg / kg per dose, preferably 0.8 to 12 per dose. It can be administered at a dose of .4 mg / kg.
- the anti-HER2 antibody-drug conjugate used in the present invention is more preferably 0.8 mg / kg, 1.6 mg / kg, 3.2 mg / kg, 5.4 mg / kg, 6.
- Dosages of 4 mg / kg, 7.4 mg / kg, or 8 mg / kg can be administered at intervals of once every three weeks, and even more preferably 5.4 mg / kg, or 6 per dose.
- a dose of .4 mg / kg can be administered at intervals of once every three weeks.
- the HER dimerization inhibitor used in the present invention (preferably pertuzumab) is preferably administered to humans at an initial dose of 840 mg and thereafter at a dose of 420 mg for 3 weeks. Can be administered at one-time intervals.
- the pharmaceutical composition and therapeutic method of the present invention may further contain a cancer therapeutic agent other than the anti-HER2-antibody-drug conjugate and the HER dimerization inhibitor used in the present invention.
- the pharmaceutical composition and therapeutic method of the present invention can also be administered in combination with other cancer therapeutic agents, whereby the antitumor effect can be enhanced.
- Other cancer therapeutic agents used for such purposes may be administered to an individual individually or continuously at the same time as the pharmaceutical composition of the present invention, or may be administered at different dosing intervals. May be done.
- Such a cancer therapeutic agent is not limited as long as it has antitumor activity, and is, for example, irinotecan (CPT-11), cisplatin, carboplatin, and oxaliplatin.
- Fluorouracil (Oxaliplatin), Fluorouracil (5-FU), Gemcitabine, Capecitabine, Paclitaxel, Docetaxyl, Docetaxyl, Docetuxel, Doxyl , Mitomycin C, Tegafur / Gimeracil / Oteracil combination drug, Cetuximab, Panitumumab, Panitumumab, Bebasizumab, Bebasizumab Trifluridine / Tipiracil combination, Gefitinib, Erlotinib, Afitinib, Metotrexate, Metofrexate, Pemethrexedi At least one selected from the group consisting of Fluorourant, Leuprolelin, Goselelin, Letrosole, Anastrozole, Progesterone formation, and lapatinib. Can be mentioned.
- the pharmaceutical composition and treatment method of the present invention can also be used in combination with radiation therapy.
- cancer patients receive radiation therapy before and / or after treatment with the pharmaceutical compositions of the invention.
- the pharmaceutical composition and treatment method of the present invention can also be used as adjuvant chemotherapy in combination with surgery.
- the pharmaceutical compositions of the present invention may be administered for the purpose of reducing the size of the tumor prior to surgery (referred to as neoadjuvant chemotherapy or neoadjuvant therapy) and prevent recurrence of the tumor after surgery. It may be administered for the purpose (referred to as neoadjuvant chemotherapy or adjuvant therapy).
- Example 1 Production of anti-HER2 antibody-drug conjugate According to the production method described in International Publication No. 2015/115091, the humanized anti-HER2 antibody (amino acid sequence set forth in SEQ ID NO: 11 (amino acid numbers 1 to 1 in SEQ ID NO: 1)).
- An antibody (antibody) comprising a heavy chain consisting of the amino acid sequence shown in 449) and a light chain consisting of the amino acid sequence shown in SEQ ID NO: 2).
- HER2-ADC (1) anti-HER2 antibody-drug conjugate in which the drug linker shown in 1 and the anti-HER2 antibody were bound by a thioether bond was produced.
- the DAT of the HER2-ADC (1) is 7.8.
- Example 2 Antitumor test (1) Mice: 5-6 week old female BALB / c nude mice (Charles River Laboratories, Japan) were used in the experiment.
- KPL-4 cells a human breast cancer strain obtained from Dr. Junichi Kurebayashi (British Journal of Cancer, (1999) 79 (5/6) .707-717), Kawasaki Medical School, were suspended in physiological saline and 1.5. ⁇ 10 7 cells were subcutaneously transplanted to the lateral side of the right body of female nude mice, and grouping was performed 17 days after transplantation (Day 0).
- HER2-ADC (1) was administered intravenously to Day 0 at a dose of 7.5 mg / kg.
- Pertuzumab was administered intravenously to Day 0 at a dose of 30 mg / kg and Day 7 at a dose of 15 mg / kg.
- a solvent administration group was set as a control group and a combination administration group with each single agent.
- FIG. 13 shows the results of the combined use of HER2-ADC (1) and Pertuzumab.
- the tumor growth inhibition rate (Tumor Grotth Inhibition; TGI) on the day when the effect of Pertuzumab monotherapy was determined was 66%, and no tumor disappearance was observed in all 6 cases.
- the TGI by single agent administration of HER2-ADC (1) was 83%, and tumor disappearance was observed in 1 of 6 cases.
- the combined administration of HER2-ADC (1) and Pertuzumab showed a significantly superior tumor growth inhibitory effect than the single agent administration of Pertuzumab (P ⁇ 0.001 (calculated by Dunnett's test). .)), TGI was 100%, and tumor disappearance was observed in 4 of 6 cases.
- the horizontal axis shows the number of days after the first administration
- the vertical axis shows the tumor volume.
- no conspicuous findings such as weight loss were observed in any of the single-agent and combination-administered groups.
- the test is carried out by the method used in this evaluation example.
- Example 3 Antitumor test (2) Human breast cancer strain MDA-MB-453 cells purchased from ATCC (American Type Culture Collection) (Breast Cancer Res. 2011 Aug 12; 13 (4): 215, and J Mol Diagn. 2017 Mar; 19 (2): 244- (See 254 etc.) was suspended in Matrigel matrix, 1.0 ⁇ 10 7 cells were subcutaneously transplanted to the right side of female nude mice, and grouping was performed 7 days after transplantation (Day 0).
- HER2-ADC (1) was administered intravenously to Day 0 at a dose of 0.5 mg / kg.
- Pertuzumab was administered intravenously to Day 0 at a dose of 30 mg / kg and Day 7 and Day 14 at a dose of 15 mg / kg.
- a solvent administration group was set as a control group and a combination administration group with each single agent.
- FIG. 14 shows the results of the combined use of HER2-ADC (1) and Pertuzumab.
- the TGI was 95% on the day when the effect of Pertuzumab monotherapy was determined, and tumor disappearance was observed in 3 of 6 cases.
- the TGI by single agent administration of HER2-ADC (1) was 74%, and no tumor disappearance was observed in all 6 cases.
- the combined administration of HER2-ADC (1) and Pertuzumab showed a significantly superior tumor growth inhibitory effect than the single agent administration of HER2-ADC (1) (P ⁇ 0.001), and the TGI was 99. %, And tumor disappearance was observed in 5 of 6 cases.
- no conspicuous findings such as weight loss were observed in any of the single-agent and combination-administered groups.
- SEQ ID NO: 1 Amino acid sequence number of anti-HER2 antibody heavy chain
- SEQ ID NO: 2 Amino acid sequence number of anti-HER2 antibody light chain: Amino acid sequence number 3: Amino acid sequence number of CDRH1 of anti-HER2 antibody 4: Amino acid sequence number of CDRH2 of anti-HER2 antibody 5: Amino acid sequence of CDRH3 of anti-HER2 antibody
- SEQ ID NO: 6 Amino acid sequence of CDRL1 of anti-HER2 antibody
- SEQ ID NO: 7 Amino acid sequence containing amino acid sequence (SAS) of CDRL2 of anti-HER2 antibody
- SEQ ID NO: 8 CDRL3 of anti-HER2 antibody
- Amino acid SEQ ID NO: 9 Amino acid sequence of the heavy chain variable region of the anti-HER2 antibody
- SEQ ID NO: 10 Amino acid sequence of the light chain variable region of the anti-HER2 antibody
- SEQ ID NO: 11 Amino acid sequence of the anti-HER2 antibody heavy
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Abstract
Description
[1]
抗HER2抗体-薬物コンジュゲートと、HER二量体化阻害剤が、組み合わされて投与されることを特徴とする医薬組成物であって、
該抗HER2抗体-薬物コンジュゲートは、式
で示される薬物リンカーと、抗HER2抗体とがチオエーテル結合によって結合した抗HER2抗体-薬物コンジュゲートである、医薬組成物。
[2]
抗HER2抗体が、配列番号3に記載のアミノ酸配列からなるCDRH1、配列番号4に記載のアミノ酸配列からなるCDRH2、及び配列番号5に記載のアミノ酸配列からなるCDRH3を含む重鎖、並びに、配列番号6に記載のアミノ酸配列からなるCDRL1、配列番号7においてアミノ酸番号1乃至3に記載のアミノ酸配列からなるCDRL2、及び配列番号8に記載のアミノ酸配列からなるCDRL3を含む軽鎖、を含んでなる抗体である、[1]に記載の医薬組成物。
[3]
抗HER2抗体が、配列番号9に記載のアミノ酸配列からなる重鎖可変領域を含む重鎖、及び配列番号10に記載のアミノ酸配列からなる軽鎖可変領域を含む軽鎖、を含んでなる抗体である、[1]に記載の医薬組成物。
[4]
抗HER2抗体が、配列番号1に記載のアミノ酸配列からなる重鎖及び配列番号2に記載のアミノ酸配列からなる軽鎖を含んでなる抗体である、[1]に記載の医薬組成物。
[5]
抗HER2抗体が、配列番号11に記載のアミノ酸配列からなる重鎖及び配列番号2に記載のアミノ酸配列からなる軽鎖を含んでなる抗体である、[1]に記載の医薬組成物。
[6]
抗HER2抗体-薬物コンジュゲートが、式
で示される抗HER2抗体-薬物コンジュゲートである、[1]から[5]のいずれか1項に記載の医薬組成物。
[7]
抗HER2抗体-薬物コンジュゲートがトラスツズマブデルクステカンである、[1]から[6]のいずれか1項に記載の医薬組成物。
[8]
HER二量体化阻害剤が、HER2蛋白の細胞外ドメインのサブドメインIIに結合する抗体である、[1]から[7]のいずれか1項に記載の医薬組成物。
[9]
HER二量体化阻害剤が、ペルツズマブである、[1]から[7]のいずれか1項に記載の医薬組成物。
[10]
抗HER2抗体-薬物コンジュゲートと、HER二量体化阻害剤が、それぞれ別異の製剤に有効成分として含有され、同時に又は異なる時間に投与されることを特徴とする、[1]から[9]のいずれか1項に記載の医薬組成物。
[11]
抗HER2抗体-薬物コンジュゲートと、HER二量体化阻害剤が、単一の製剤に有効成分として含有され、投与されることを特徴とする、[1]から[9]のいずれか1項に記載の医薬組成物。
[12]
がんの治療のための、[1]から[11]のいずれか1項に記載の医薬組成物。
[13]
がんが、乳がん、胃がん、大腸がん、肺がん、食道がん、頭頚部がん、胃食道接合部腺がん、胆道がん、ページェット病、膵臓がん、卵巣がん、子宮がん肉腫、膀胱がん、前立腺がん、尿路上皮がん、消化管間質腫瘍、子宮頸がん、扁平上皮がん、腹膜がん、肝臓がん、肝細胞がん、子宮体がん、腎がん、外陰部がん、甲状腺がん、陰茎がん、白血病、悪性リンパ腫、形質細胞腫、骨髄腫、多型神経膠芽腫、肉腫、骨肉腫、及びメラノーマからなる群より選択される少なくとも一つである、[12]に記載の医薬組成物。
[14]
がんが、乳がん、胃がん、大腸がん、肺がん、食道がん、頭頚部がん、胃食道接合部腺がん、胆道がん、ページェット病、膵臓がん、卵巣がん、子宮がん肉腫、膀胱がん、及び前立腺がんからなる群より選択される少なくとも一つである、[12]に記載の医薬組成物。
[15]
がんが、乳がんである、[12]に記載の医薬組成物。
[16]
がんが、HER2過剰発現のがんである、[12]から[15]のいずれか1項に記載の医薬組成物。
[17]
HER2過剰発現のがんが、免疫組織化学法によりHER2の発現が3+と判定されたがんである、[16]に記載の医薬組成物。
[18]
HER2過剰発現のがんが、免疫組織化学法によりHER2の発現が2+と判定され、且つ、in situハイブリダイゼーション法によりHER2の発現が陽性と判定されたがんである、[16]に記載の医薬組成物。
[19]
がんが、HER2低発現のがんである、[12]から[15]のいずれか1項に記載の医薬組成物。
[20]
HER2低発現のがんが、免疫組織化学法によりHER2の発現が2+と判定され、且つ、in situハイブリダイゼーション法によりHER2の発現が陰性と判定されたがんである、[19]に記載の医薬組成物。
[21]
HER2低発現のがんが、免疫組織化学法によりHER2の発現が1+と判定されたがんである、[19]に記載の医薬組成物。
[22]
HER2低発現のがんが、免疫組織化学法によりHER2の発現が>0且つ<1+と判定されたがんである、[19]に記載の医薬組成物。
[23]
抗HER2抗体-薬物コンジュゲートの単独投与よりも有意に優れた抗腫瘍効果を示すことを特徴とする、[12]から[22]のいずれか1項に記載の医薬組成物。
[24]
抗HER2抗体-薬物コンジュゲートの単独投与では治療できないがんを治療するための、[12]から[23]のいずれか1項に記載の医薬組成物。
[25]
抗HER2抗体-薬物コンジュゲートと、HER二量体化阻害剤が、相乗的な抗腫瘍効果を示すことを特徴とする、[12]から[24]のいずれか1項に記載の医薬組成物。
[26]
抗HER2抗体-薬物コンジュゲートと、HER二量体化阻害剤が、組み合わされて治療を必要とする個体に投与されることを特徴とする治療方法であって、
該抗HER2抗体-薬物コンジュゲートは、式
で示される薬物リンカーと、抗HER2抗体とがチオエーテル結合によって結合した抗HER2抗体-薬物コンジュゲートである、治療方法。
[27]
抗HER2抗体が、配列番号3に記載のアミノ酸配列からなるCDRH1、配列番号4に記載のアミノ酸配列からなるCDRH2、及び配列番号5に記載のアミノ酸配列からなるCDRH3を含む重鎖、並びに、配列番号6に記載のアミノ酸配列からなるCDRL1、配列番号7においてアミノ酸番号1乃至3に記載のアミノ酸配列からなるCDRL2、及び配列番号8に記載のアミノ酸配列からなるCDRL3を含む軽鎖、を含んでなる抗体である、[26]に記載の治療方法。
[28]
抗HER2抗体が、配列番号9に記載のアミノ酸配列からなる重鎖可変領域を含む重鎖、及び配列番号10に記載のアミノ酸配列からなる軽鎖可変領域を含む軽鎖、を含んでなる抗体である、[26]に記載の治療方法。
[29]
抗HER2抗体が、配列番号1に記載のアミノ酸配列からなる重鎖及び配列番号2に記載のアミノ酸配列からなる軽鎖を含んでなる抗体である、[26]に記載の治療方法。
[30]
抗HER2抗体が、配列番号11に記載のアミノ酸配列からなる重鎖及び配列番号2に記載のアミノ酸配列からなる軽鎖を含んでなる抗体である、[26]に記載の治療方法。
[31]
抗HER2抗体-薬物コンジュゲートが、式
で示される抗HER2抗体-薬物コンジュゲートである、[26]から[30]のいずれか1項に記載の治療方法。
[32]
抗HER2抗体-薬物コンジュゲートがトラスツズマブデルクステカンである、[26]から[31]のいずれか1項に記載の治療方法。
[33]
HER二量体化阻害剤が、HER2蛋白の細胞外ドメインのサブドメインIIに結合する抗体である、[26]から[32]のいずれか1項に記載の治療方法。
[34]
HER二量体化阻害剤が、ペルツズマブである、[26]から[32]のいずれか1項に記載の治療方法。[35]
抗HER2抗体-薬物コンジュゲートと、HER二量体化阻害剤が、それぞれ別異の製剤に有効成分として含有され、同時に又は異なる時間に投与されることを特徴とする、[26]から[34]のいずれか1項に記載の治療方法。
[36]
抗HER2抗体-薬物コンジュゲートと、HER二量体化阻害剤が、単一の製剤に有効成分として含有され、投与されることを特徴とする、[26]から[34]のいずれか1項に記載の治療方法。
[37]
がんの治療のための、[26]から[36]のいずれか1項に記載の治療方法。
[38]
がんが、乳がん、胃がん、大腸がん、肺がん、食道がん、頭頚部がん、胃食道接合部腺がん、胆道がん、ページェット病、膵臓がん、卵巣がん、子宮がん肉腫、膀胱がん、前立腺がん、尿路上皮がん、消化管間質腫瘍、子宮頸がん、扁平上皮がん、腹膜がん、肝臓がん、肝細胞がん、子宮体がん、腎がん、外陰部がん、甲状腺がん、陰茎がん、白血病、悪性リンパ腫、形質細胞腫、骨髄腫、多型神経膠芽腫、肉腫、骨肉腫、及びメラノーマからなる群より選択される少なくとも一つである、[37]に記載の治療方法。
[39]
がんが、乳がん、胃がん、大腸がん、肺がん、食道がん、頭頚部がん、胃食道接合部腺がん、胆道がん、ページェット病、膵臓がん、卵巣がん、子宮がん肉腫、膀胱がん、及び前立腺がんからなる群より選択される少なくとも一つである、[37]に記載の治療方法。
[40]
がんが、乳がんである、[37]に記載の治療方法。
[41]
がんが、HER2過剰発現のがんである、[37]から[40]のいずれか1項に記載の治療方法。
[42]
HER2過剰発現のがんが、免疫組織化学法によりHER2の発現が3+と判定されたがんである、[41]に記載の治療方法。
[43]
HER2過剰発現のがんが、免疫組織化学法によりHER2の発現が2+と判定され、且つ、in situハイブリダイゼーション法によりHER2の発現が陽性と判定されたがんである、[41]に記載の治療方法。
[44]
がんが、HER2低発現のがんである、[37]から[40]のいずれか1項に記載の治療方法。
[45]
HER2低発現のがんが、免疫組織化学法によりHER2の発現が2+と判定され、且つ、in situハイブリダイゼーション法によりHER2の発現が陰性と判定されたがんである、[44]に記載の治療方法。
[46]
HER2低発現のがんが、免疫組織化学法によりHER2の発現が1+と判定されたがんである、[44]に記載の治療方法。
[47]
HER2低発現のがんが、免疫組織化学法によりHER2の発現が>0且つ<1+と判定されたがんである、[44]に記載の治療方法。
[48]
抗HER2抗体-薬物コンジュゲートの単独投与よりも有意に優れた抗腫瘍効果を示すことを特徴とする、[37]から[47]のいずれか1項に記載の治療方法。
[49]
抗HER2抗体-薬物コンジュゲートの単独投与では治療できないがんを治療するための、[37]から[48]のいずれか1項に記載の治療方法。
[50]
抗HER2抗体-薬物コンジュゲートと、HER二量体化阻害剤が、相乗的な抗腫瘍効果を示すことを特徴とする、[37]から[49]のいずれか1項に記載の治療方法。
[51]
HER二量体化阻害剤と、組み合わされて投与されることにより、疾患を治療するための
式
で示される薬物リンカーと、抗HER2抗体とがチオエーテル結合によって結合した抗HER2抗体-薬物コンジュゲート。
[52]
抗HER2抗体が、配列番号3に記載のアミノ酸配列からなるCDRH1、配列番号4に記載のアミノ酸配列からなるCDRH2、及び配列番号5に記載のアミノ酸配列からなるCDRH3を含む重鎖、並びに、配列番号6に記載のアミノ酸配列からなるCDRL1、配列番号7においてアミノ酸番号1乃至3に記載のアミノ酸配列からなるCDRL2、及び配列番号8に記載のアミノ酸配列からなるCDRL3を含む軽鎖、を含んでなる抗体である、[51]に記載の抗HER2抗体-薬物コンジュゲート。
[53]
抗HER2抗体が、配列番号9に記載のアミノ酸配列からなる重鎖可変領域を含む重鎖、及び配列番号10に記載のアミノ酸配列からなる軽鎖可変領域を含む軽鎖、を含んでなる抗体である、[51]に記載の抗HER2抗体-薬物コンジュゲート。
[54]
抗HER2抗体が、配列番号1に記載のアミノ酸配列からなる重鎖及び配列番号2に記載のアミノ酸配列からなる軽鎖を含んでなる抗体である、[51]に記載の抗HER2抗体-薬物コンジュゲート。
[55]
抗HER2抗体が、配列番号11に記載のアミノ酸配列からなる重鎖及び配列番号2に記載のアミノ酸配列からなる軽鎖を含んでなる抗体である、[51]に記載の抗HER2抗体-薬物コンジュゲート。
[56]
抗HER2抗体-薬物コンジュゲートが、式
で示される抗HER2抗体-薬物コンジュゲートである、[51]から[55]のいずれか1項に記載の抗HER2抗体-薬物コンジュゲート。
[57]
抗HER2抗体-薬物コンジュゲートがトラスツズマブデルクステカンである、[51]から[56]のいずれか1項に記載の抗HER2抗体-薬物コンジュゲート。
[58]
HER二量体化阻害剤が、HER2蛋白の細胞外ドメインのサブドメインIIに結合する抗体である、[51]から[57]のいずれか1項に記載の抗HER2抗体-薬物コンジュゲート。
[59]
HER二量体化阻害剤が、ペルツズマブである、[51]から[57]のいずれか1項に記載の抗HER2抗体-薬物コンジュゲート。
[60]
抗HER2抗体-薬物コンジュゲートと、HER二量体化阻害剤が、それぞれ別異の製剤に有効成分として含有され、同時に又は異なる時間に投与されることを特徴とする、[51]から[59]のいずれか1項に記載の抗HER2抗体-薬物コンジュゲート。
[61]
抗HER2抗体-薬物コンジュゲートと、HER二量体化阻害剤が、単一の製剤に有効成分として含有され、投与されることを特徴とする、[51]から[59]のいずれか1項に記載の抗HER2抗体-薬物コンジュゲート。
[62]
がんの治療のための、[51]から[61]のいずれか1項に記載の抗HER2抗体-薬物コンジュゲート。
[63]
がんが、乳がん、胃がん、大腸がん、肺がん、食道がん、頭頚部がん、胃食道接合部腺がん、胆道がん、ページェット病、膵臓がん、卵巣がん、子宮がん肉腫、膀胱がん、前立腺がん、尿路上皮がん、消化管間質腫瘍、子宮頸がん、扁平上皮がん、腹膜がん、肝臓がん、肝細胞がん、子宮体がん、腎がん、外陰部がん、甲状腺がん、陰茎がん、白血病、悪性リンパ腫、形質細胞腫、骨髄腫、多型神経膠芽腫、肉腫、骨肉腫、及びメラノーマからなる群より選択される少なくとも一つである、[62]に記載の抗HER2抗体-薬物コンジュゲート。
[64]
がんが、乳がん、胃がん、大腸がん、肺がん、食道がん、頭頚部がん、胃食道接合部腺がん、胆道がん、ページェット病、膵臓がん、卵巣がん、子宮がん肉腫、膀胱がん、及び前立腺がんからなる群より選択される少なくとも一つである、[62]に記載の抗HER2抗体-薬物コンジュゲート。
[65]
がんが、乳がんである、[62]に記載の抗HER2抗体-薬物コンジュゲート。
[66]
がんが、HER2過剰発現のがんである、[62]から[65]のいずれか1項に記載の抗HER2抗体-薬物コンジュゲート。
[67]
HER2過剰発現のがんが、免疫組織化学法によりHER2の発現が3+と判定されたがんである、[66]に記載の抗HER2抗体-薬物コンジュゲート。
[68]
HER2過剰発現のがんが、免疫組織化学法によりHER2の発現が2+と判定され、且つ、in situハイブリダイゼーション法によりHER2の発現が陽性と判定されたがんである、[66]に記載の抗HER2抗体-薬物コンジュゲート。
[69]
がんが、HER2低発現のがんである、[62]から[65]のいずれか1項に記載の抗HER2抗体-薬物コンジュゲート。
[70]
HER2低発現のがんが、免疫組織化学法によりHER2の発現が2+と判定され、且つ、in situハイブリダイゼーション法によりHER2の発現が陰性と判定されたがんである、[69]に記載の抗HER2抗体-薬物コンジュゲート。
[71]
HER2低発現のがんが、免疫組織化学法によりHER2の発現が1+と判定されたがんである、[69]に記載の抗HER2抗体-薬物コンジュゲート。
[72]
HER2低発現のがんが、免疫組織化学法によりHER2の発現が>0且つ<1+と判定されたがんである、[69]に記載の抗HER2抗体-薬物コンジュゲート。
[73]
抗HER2抗体-薬物コンジュゲートの単独投与よりも有意に優れた抗腫瘍効果を示すことを特徴とする、[62]から[72]のいずれか1項に記載の抗HER2抗体-薬物コンジュゲート。
[74]
抗HER2抗体-薬物コンジュゲートの単独投与では治療できないがんを治療するための、[62]から[73]のいずれか1項に記載の抗HER2抗体-薬物コンジュゲート。
[75]
抗HER2抗体-薬物コンジュゲートと、HER二量体化阻害剤が、相乗的な抗腫瘍効果を示すことを特徴とする、[62]から[74]のいずれか1項に記載の抗HER2抗体-薬物コンジュゲート。
[76]
HER二量体化阻害剤と、組み合わされて投与されることにより、疾患を治療するための医薬の製造のための
式
で示される薬物リンカーと、抗HER2抗体とがチオエーテル結合によって結合した抗HER2抗体-薬物コンジュゲートの使用。
[77]
抗HER2抗体が、配列番号3に記載のアミノ酸配列からなるCDRH1、配列番号4に記載のアミノ酸配列からなるCDRH2、及び配列番号5に記載のアミノ酸配列からなるCDRH3を含む重鎖、並びに、配列番号6に記載のアミノ酸配列からなるCDRL1、配列番号7においてアミノ酸番号1乃至3に記載のアミノ酸配列からなるCDRL2、及び配列番号8に記載のアミノ酸配列からなるCDRL3を含む軽鎖、を含んでなる抗体である、[76]に記載の使用。
[78]
抗HER2抗体が、配列番号9に記載のアミノ酸配列からなる重鎖可変領域を含む重鎖、及び配列番号10に記載のアミノ酸配列からなる軽鎖可変領域を含む軽鎖、を含んでなる抗体である、[76]に記載の使用。
[79]
抗HER2抗体が、配列番号1に記載のアミノ酸配列からなる重鎖及び配列番号2に記載のアミノ酸配列からなる軽鎖を含んでなる抗体である、[76]に記載の使用。
[80]
抗HER2抗体が、配列番号11に記載のアミノ酸配列からなる重鎖及び配列番号2に記載のアミノ酸配列からなる軽鎖を含んでなる抗体である、[76]に記載の使用。
[81]
抗HER2抗体-薬物コンジュゲートが、式
で示される抗HER2抗体-薬物コンジュゲートである、[76]から[80]のいずれか1項に記載の使用。
[82]
抗HER2抗体-薬物コンジュゲートがトラスツズマブデルクステカンである、[76]から[81]のいずれか1項に記載の使用。
[83]
HER二量体化阻害剤が、HER2蛋白の細胞外ドメインのサブドメインIIに結合する抗体である、[76]から[82]のいずれか1項に記載の使用。
[84]
HER二量体化阻害剤が、ペルツズマブである、[76]から[82]のいずれか1項に記載の使用。[85]
抗HER2抗体-薬物コンジュゲートと、HER二量体化阻害剤が、それぞれ別異の製剤に有効成分として含有され、同時に又は異なる時間に投与されることを特徴とする、[76]から[84]のいずれか1項に記載の使用。
[86]
抗HER2抗体-薬物コンジュゲートと、HER二量体化阻害剤が、単一の製剤に有効成分として含有され、投与されることを特徴とする、[76]から[84]のいずれか1項に記載の使用。
[87]
がんの治療のための、[76]から[86]のいずれか1項に記載の使用。
[88]
がんが、乳がん、胃がん、大腸がん、肺がん、食道がん、頭頚部がん、胃食道接合部腺がん、胆道がん、ページェット病、膵臓がん、卵巣がん、子宮がん肉腫、膀胱がん、前立腺がん、尿路上皮がん、消化管間質腫瘍、子宮頸がん、扁平上皮がん、腹膜がん、肝臓がん、肝細胞がん、子宮体がん、腎がん、外陰部がん、甲状腺がん、陰茎がん、白血病、悪性リンパ腫、形質細胞腫、骨髄腫、多型神経膠芽腫、肉腫、骨肉腫、及びメラノーマからなる群より選択される少なくとも一つである、[87]に記載の使用。
[89]
がんが、乳がん、胃がん、大腸がん、肺がん、食道がん、頭頚部がん、胃食道接合部腺がん、胆道がん、ページェット病、膵臓がん、卵巣がん、子宮がん肉腫、膀胱がん、及び前立腺がんからなる群より選択される少なくとも一つである、[87]に記載の使用。
[90]
がんが、乳がんである、[87]に記載の使用。
[91]
がんが、HER2過剰発現のがんである、[87]から[90]のいずれか1項に記載の使用。
[92]
HER2過剰発現のがんが、免疫組織化学法によりHER2の発現が3+と判定されたがんである、[91]に記載の使用。
[93]
HER2過剰発現のがんが、免疫組織化学法によりHER2の発現が2+と判定され、且つ、in situハイブリダイゼーション法によりHER2の発現が陽性と判定されたがんである、[91]に記載の使用。
[94]
がんが、HER2低発現のがんである、[87]から[90]のいずれか1項に記載の使用。
[95]
HER2低発現のがんが、免疫組織化学法によりHER2の発現が2+と判定され、且つ、in situハイブリダイゼーション法によりHER2の発現が陰性と判定されたがんである、[94]に記載の使用。
[96]
HER2低発現のがんが、免疫組織化学法によりHER2の発現が1+と判定されたがんである、[94]に記載の使用。
[97]
HER2低発現のがんが、免疫組織化学法によりHER2の発現が>0且つ<1+と判定されたがんである、[94]に記載の使用。
[98]
抗HER2抗体-薬物コンジュゲートの単独投与よりも有意に優れた抗腫瘍効果を示すことを特徴とする、[76]から[97]のいずれか1項に記載の使用。
[99]
抗HER2抗体-薬物コンジュゲートの単独投与では治療できないがんを治療するための、[76]から[98]のいずれか1項に記載の使用。
[100]
抗HER2抗体-薬物コンジュゲートと、HER二量体化阻害剤が、相乗的な抗腫瘍効果を示すことを特徴とする、[76]から[99]のいずれか1項に記載の使用。
本発明において、「HER2」とは、ヒト上皮増殖因子受容体2(neu、ErbB-2と呼ばれることもある)と同義であり、HER1(EGFR、ErbB-1)、HER3(ErbB-3)及びHER4(ErbB-4)とともに受容体蛋白質チロシンキナーゼの上皮増殖因子受容体(EGFR)サブファミリーに属する膜貫通受容体である。HER2は、HER1、HER3、又はHER4とのヘテロダイマー形成により細胞内チロシン残基が自己リン酸化されて活性化することにより、正常細胞及び腫瘍細胞において細胞の増殖・分化・生存に重要な役割を果たすことが知られている。
本発明において使用される抗HER2抗体-薬物コンジュゲートは、式
で示される薬物リンカーと、抗HER2抗体とがチオエーテル結合によって結合した抗HER2抗体-薬物コンジュゲートである。
より好適には、配列番号9に記載のアミノ酸配列(配列番号1においてアミノ酸番号1乃至120に記載のアミノ酸配列)からなる重鎖可変領域を含む重鎖、及び配列番号10に記載のアミノ酸配列(配列番号2においてアミノ酸番号1乃至107に記載のアミノ酸配列)からなる軽鎖可変領域を含む軽鎖、を含んでなる抗体であり、
更により好適には、配列番号1に記載のアミノ酸配列からなる重鎖及び配列番号2に記載のアミノ酸配列からなる軽鎖を含んでなる抗体、又は、配列番号11に記載のアミノ酸配列(配列番号1においてアミノ酸番号1乃至449に記載のアミノ酸配列)からなる重鎖及び配列番号2に記載のアミノ酸配列からなる軽鎖を含んでなる抗体である。
本発明で用いるHER2蛋白は、ヒト、非ヒト哺乳動物(ラット、マウス等)のHER2発現細胞から直接精製して使用するか、或は当該細胞の細胞膜画分を調製して使用することができ、また、HER2をin vitroにて合成する、或は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。遺伝子操作では、具体的には、HER2 cDNAを発現可能なベクターに組み込んだ後、転写と翻訳に必要な酵素、基質及びエネルギー物質を含む溶液中で合成する、或は他の原核生物、又は真核生物の宿主細胞を形質転換してHER2を発現させることによって、該蛋白質を得ることができる。また、前記の遺伝子操作によるHER2発現細胞、或はHER2を発現している細胞株をHER2蛋白として使用することも可能である。
本発明に係る抗HER2抗体-薬物コンジュゲートの製造に使用される薬物リンカー中間体は、次式で示される。
本発明において「HER二量体化阻害剤」とは、HER2蛋白に結合することにより、HER2と、HER1、HER3、又はHER4とのヘテロダイマー形成を阻害する薬剤を意味する。本発明におけるHER二量体化阻害剤は、上記の機能を有する薬剤であれば限定はされないが、好適には、HER2蛋白の細胞外ドメインのサブドメインIIに結合する抗体を挙げることができ、より好適には、ペルツズマブを挙げることができる。
以下、本発明に係る抗HER2抗体-薬物コンジュゲートとHER二量体化阻害剤が組み合わされて投与されることを特徴とする医薬組成物及び治療方法について説明する。
国際公開第2015/115091号に記載の製造方法に従って、ヒト化抗HER2抗体(配列番号11に記載のアミノ酸配列(配列番号1においてアミノ酸番号1乃至449に記載のアミノ酸配列)からなる重鎖及び配列番号2に記載のアミノ酸配列からなる軽鎖を含んでなる抗体)を用いて、式
で示される薬物リンカーと、抗HER2抗体とがチオエーテル結合によって結合した抗HER2抗体-薬物コンジュゲート(本発明において「HER2-ADC(1)」と称する)を製造した。HER2-ADC(1)のDARは7.8である。
マウス:5-6週齢の雌BALB/c ヌードマウス(日本チャールス・リバー社)を実験に供した。
腫瘍体積(mm3)=1/2×長径(mm)×[短径(mm)]2
HER2-ADC(1)はABS buffer (10mM酢酸緩衝液 (pH5.5), 5%ソルビトール)で希釈し、10mL/kgの液量を尾静脈内投与した。Pertuzumabは生理食塩水で希釈し、10mL/kgの液量を尾静脈内投与した。
ATCC(American Type Culture Collection)から購入したヒト乳がん株MDA-MB-453細胞(Breast Cancer Res. 2011 Aug 12;13(4):215、及びJ Mol Diagn. 2017 Mar; 19(2): 244-254等を参照)をMatrigel matrixに懸濁し、1.0×107cellsを雌ヌードマウスの右体側部に皮下移植し、移植7日後に無作為に群分けを実施した(Day0)。HER2-ADC(1)はDay0に0.5mg/kgの用量で尾静脈内投与した。PertuzumabはDay0に30mg/kg、Day7及びDay14に15mg/kgの用量で尾静脈内投与した。それぞれの単剤と併用投与群、及びコントロール群として溶媒投与群を設定した。
配列番号2:抗HER2抗体軽鎖のアミノ酸配列
配列番号3:抗HER2抗体のCDRH1のアミノ酸配列
配列番号4:抗HER2抗体のCDRH2のアミノ酸配列
配列番号5:抗HER2抗体のCDRH3のアミノ酸配列
配列番号6:抗HER2抗体のCDRL1のアミノ酸配列
配列番号7:抗HER2抗体のCDRL2のアミノ酸配列(SAS)を含むアミノ酸配列
配列番号8:抗HER2抗体のCDRL3のアミノ酸配列
配列番号9:抗HER2抗体の重鎖可変領域のアミノ酸配列
配列番号10:抗HER2抗体の軽鎖可変領域のアミノ酸配列
配列番号11:抗HER2抗体重鎖のアミノ酸配列
配列番号12:HER2蛋白のアミノ酸配列
配列番号13:HER2遺伝子(cDNA)のヌクレオチド配列
Claims (50)
- 抗HER2抗体が、配列番号3に記載のアミノ酸配列からなるCDRH1、配列番号4に記載のアミノ酸配列からなるCDRH2、及び配列番号5に記載のアミノ酸配列からなるCDRH3を含む重鎖、並びに、配列番号6に記載のアミノ酸配列からなるCDRL1、配列番号7においてアミノ酸番号1乃至3に記載のアミノ酸配列からなるCDRL2、及び配列番号8に記載のアミノ酸配列からなるCDRL3を含む軽鎖、を含んでなる抗体である、請求項1に記載の医薬組成物。
- 抗HER2抗体が、配列番号9に記載のアミノ酸配列からなる重鎖可変領域を含む重鎖、及び配列番号10に記載のアミノ酸配列からなる軽鎖可変領域を含む軽鎖、を含んでなる抗体である、請求項1に記載の医薬組成物。
- 抗HER2抗体が、配列番号1に記載のアミノ酸配列からなる重鎖及び配列番号2に記載のアミノ酸配列からなる軽鎖を含んでなる抗体である、請求項1に記載の医薬組成物。
- 抗HER2抗体が、配列番号11に記載のアミノ酸配列からなる重鎖及び配列番号2に記載のアミノ酸配列からなる軽鎖を含んでなる抗体である、請求項1に記載の医薬組成物。
- 抗HER2抗体-薬物コンジュゲートがトラスツズマブデルクステカンである、請求項1から6のいずれか1項に記載の医薬組成物。
- HER二量体化阻害剤が、HER2蛋白の細胞外ドメインのサブドメインIIに結合する抗体である、請求項1から7のいずれか1項に記載の医薬組成物。
- HER二量体化阻害剤が、ペルツズマブである、請求項1から7のいずれか1項に記載の医薬組成物。
- 抗HER2抗体-薬物コンジュゲートと、HER二量体化阻害剤が、それぞれ別異の製剤に有効成分として含有され、同時に又は異なる時間に投与されることを特徴とする、請求項1から9のいずれか1項に記載の医薬組成物。
- 抗HER2抗体-薬物コンジュゲートと、HER二量体化阻害剤が、単一の製剤に有効成分として含有され、投与されることを特徴とする、請求項1から9のいずれか1項に記載の医薬組成物。
- がんの治療のための、請求項1から11のいずれか1項に記載の医薬組成物。
- がんが、乳がん、胃がん、大腸がん、肺がん、食道がん、頭頚部がん、胃食道接合部腺がん、胆道がん、ページェット病、膵臓がん、卵巣がん、子宮がん肉腫、膀胱がん、前立腺がん、尿路上皮がん、消化管間質腫瘍、子宮頸がん、扁平上皮がん、腹膜がん、肝臓がん、肝細胞がん、子宮体がん、腎がん、外陰部がん、甲状腺がん、陰茎がん、白血病、悪性リンパ腫、形質細胞腫、骨髄腫、多型神経膠芽腫、肉腫、骨肉腫、及びメラノーマからなる群より選択される少なくとも一つである、請求項12に記載の医薬組成物。
- がんが、乳がん、胃がん、大腸がん、肺がん、食道がん、頭頚部がん、胃食道接合部腺がん、胆道がん、ページェット病、膵臓がん、卵巣がん、子宮がん肉腫、膀胱がん、及び前立腺がんからなる群より選択される少なくとも一つの治療のための、請求項12に記載の医薬組成物。
- がんが、乳がんである、請求項12に記載の医薬組成物。
- がんが、HER2過剰発現のがんである、請求項12から15のいずれか1項に記載の医薬組成物。
- HER2過剰発現のがんが、免疫組織化学法によりHER2の発現が3+と判定されたがんである、請求項16に記載の医薬組成物。
- HER2過剰発現のがんが、免疫組織化学法によりHER2の発現が2+と判定され、且つ、in situハイブリダイゼーション法によりHER2の発現が陽性と判定されたがんである、請求項16に記載の医薬組成物。
- がんが、HER2低発現のがんである、請求項12から15のいずれか1項に記載の医薬組成物。
- HER2低発現のがんが、免疫組織化学法によりHER2の発現が2+と判定され、且つ、in situハイブリダイゼーション法によりHER2の発現が陰性と判定されたがんである、請求項19に記載の医薬組成物。
- HER2低発現のがんが、免疫組織化学法によりHER2の発現が1+と判定されたがんである、請求項19に記載の医薬組成物。
- HER2低発現のがんが、免疫組織化学法によりHER2の発現が>0且つ<1+と判定されたがんである、請求項19に記載の医薬組成物。
- 抗HER2抗体-薬物コンジュゲートの単独投与よりも有意に優れた抗腫瘍効果を示すことを特徴とする、請求項12から22のいずれか1項に記載の医薬組成物。
- 抗HER2抗体-薬物コンジュゲートの単独投与では治療できないがんを治療するための、請求項12から23のいずれか1項に記載の医薬組成物。
- 抗HER2抗体-薬物コンジュゲートと、HER二量体化阻害剤が、相乗的な抗腫瘍効果を示すことを特徴とする、請求項12から24のいずれか1項に記載の医薬組成物。
- 抗HER2抗体が、配列番号3に記載のアミノ酸配列からなるCDRH1、配列番号4に記載のアミノ酸配列からなるCDRH2、及び配列番号5に記載のアミノ酸配列からなるCDRH3を含む重鎖、並びに、配列番号6に記載のアミノ酸配列からなるCDRL1、配列番号7においてアミノ酸番号1乃至3に記載のアミノ酸配列からなるCDRL2、及び配列番号8に記載のアミノ酸配列からなるCDRL3を含む軽鎖、を含んでなる抗体である、請求項26に記載の治療方法。
- 抗HER2抗体が、配列番号9に記載のアミノ酸配列からなる重鎖可変領域を含む重鎖、及び配列番号10に記載のアミノ酸配列からなる軽鎖可変領域を含む軽鎖、を含んでなる抗体である、請求項26に記載の治療方法。
- 抗HER2抗体が、配列番号1に記載のアミノ酸配列からなる重鎖及び配列番号2に記載のアミノ酸配列からなる軽鎖を含んでなる抗体である、請求項26に記載の治療方法。
- 抗HER2抗体が、配列番号11に記載のアミノ酸配列からなる重鎖及び配列番号2に記載のアミノ酸配列からなる軽鎖を含んでなる抗体である、請求項26に記載の治療方法。
- 抗HER2抗体-薬物コンジュゲートがトラスツズマブデルクステカンである、請求項26から31のいずれか1項に記載の治療方法。
- HER二量体化阻害剤が、HER2蛋白の細胞外ドメインのサブドメインIIに結合する抗体である、請求項26から32のいずれか1項に記載の治療方法。
- HER二量体化阻害剤が、ペルツズマブである、請求項26から32のいずれか1項に記載の治療方法。
- 抗HER2抗体-薬物コンジュゲートと、HER二量体化阻害剤が、それぞれ別異の製剤に有効成分として含有され、同時に又は異なる時間に投与されることを特徴とする、請求項26から34のいずれか1項に記載の治療方法。
- 抗HER2抗体-薬物コンジュゲートと、HER二量体化阻害剤が、単一の製剤に有効成分として含有され、投与されることを特徴とする、請求項26から34のいずれか1項に記載の治療方法。
- がんの治療のための、請求項26から36のいずれか1項に記載の治療方法。
- がんが、乳がん、胃がん、大腸がん、肺がん、食道がん、頭頚部がん、胃食道接合部腺がん、胆道がん、ページェット病、膵臓がん、卵巣がん、子宮がん肉腫、膀胱がん、前立腺がん、尿路上皮がん、消化管間質腫瘍、子宮頸がん、扁平上皮がん、腹膜がん、肝臓がん、肝細胞がん、子宮体がん、腎がん、外陰部がん、甲状腺がん、陰茎がん、白血病、悪性リンパ腫、形質細胞腫、骨髄腫、多型神経膠芽腫、肉腫、骨肉腫、及びメラノーマからなる群より選択される少なくとも一つである、請求項37に記載の治療方法。
- がんが、乳がん、胃がん、大腸がん、肺がん、食道がん、頭頚部がん、胃食道接合部腺がん、胆道がん、ページェット病、膵臓がん、卵巣がん、子宮がん肉腫、膀胱がん、及び前立腺がんからなる群より選択される少なくとも一つである、請求項37に記載の治療方法。
- がんが、乳がんである、請求項37に記載の治療方法。
- がんが、HER2過剰発現のがんである、請求項37から40のいずれか1項に記載の治療方法。
- HER2過剰発現のがんが、免疫組織化学法によりHER2の発現が3+と判定されたがんである、請求項41に記載の治療方法。
- HER2過剰発現のがんが、免疫組織化学法によりHER2の発現が2+と判定され、且つ、in situハイブリダイゼーション法によりHER2の発現が陽性と判定されたがんである、請求項41に記載の治療方法。
- がんが、HER2低発現のがんである、請求項37から40のいずれか1項に記載の治療方法。
- HER2低発現のがんが、免疫組織化学法によりHER2の発現が2+と判定され、且つ、in situハイブリダイゼーション法によりHER2の発現が陰性と判定されたがんである、請求項44に記載の治療方法。
- HER2低発現のがんが、免疫組織化学法によりHER2の発現が1+と判定されたがんである、請求項44に記載の治療方法。
- HER2低発現のがんが、免疫組織化学法によりHER2の発現が>0且つ<1+と判定されたがんである、請求項44に記載の治療方法。
- 抗HER2抗体-薬物コンジュゲートの単独投与よりも有意に優れた抗腫瘍効果を示すことを特徴とする、請求項37から47のいずれか1項に記載の治療方法。
- 抗HER2抗体-薬物コンジュゲートの単独投与では治療できないがんを治療するための、請求項37から48のいずれか1項に記載の治療方法。
- 抗HER2抗体-薬物コンジュゲートと、HER二量体化阻害剤が、相乗的な抗腫瘍効果を示すことを特徴とする、請求項37から49のいずれか1項に記載の治療方法。
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AU2021312537A AU2021312537A1 (en) | 2020-07-20 | 2021-07-19 | Combination of (anti-HER2 antibody)-drug conjugate and her dimerization inhibitor |
BR112023000982A BR112023000982A2 (pt) | 2020-07-20 | 2021-07-19 | Composição farmacêutica, e, método de tratamento |
CN202180049952.0A CN115884794A (zh) | 2020-07-20 | 2021-07-19 | 抗her2抗体药物缀合物与her二聚化抑制剂的组合 |
CA3186675A CA3186675A1 (en) | 2020-07-20 | 2021-07-19 | Combination of anti-her2 antibody-drug conjugate with her dimerization inhibitor |
US18/016,864 US20230293714A1 (en) | 2020-07-20 | 2021-07-19 | Combination of anti-her2 antibody-drug conjugate with her dimerization inhibitor |
KR1020237005605A KR20230042055A (ko) | 2020-07-20 | 2021-07-19 | 항 her2 항체-약물 콘주게이트와 her 이량체화 저해제의 조합 |
EP21846150.7A EP4183420A1 (en) | 2020-07-20 | 2021-07-19 | Combination of (anti-her2 antibody)-drug conjugate and her dimerization inhibitor |
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