WO2005035754A1 - 機能蛋白質を代替する二重特異性抗体 - Google Patents
機能蛋白質を代替する二重特異性抗体 Download PDFInfo
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Classifications
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- C07K—PEPTIDES
- C07K16/00—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies
- C07K16/18—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies against material from animals or humans
- C07K16/36—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies against material from animals or humans against blood coagulation factors
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P1/00—Drugs for disorders of the alimentary tract or the digestive system
- A61P1/16—Drugs for disorders of the alimentary tract or the digestive system for liver or gallbladder disorders, e.g. hepatoprotective agents, cholagogues, litholytics
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P25/00—Drugs for disorders of the nervous system
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- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
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- A61P31/12—Antivirals
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- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P31/00—Antiinfectives, i.e. antibiotics, antiseptics, chemotherapeutics
- A61P31/12—Antivirals
- A61P31/14—Antivirals for RNA viruses
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- A61P31/12—Antivirals
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- A61P35/00—Antineoplastic agents
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- A61P37/02—Immunomodulators
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- A—HUMAN NECESSITIES
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- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
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- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P7/00—Drugs for disorders of the blood or the extracellular fluid
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K16/00—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies
- C07K16/18—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies against material from animals or humans
- C07K16/28—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies against material from animals or humans against receptors, cell surface antigens or cell surface determinants
- C07K16/2866—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies against material from animals or humans against receptors, cell surface antigens or cell surface determinants against receptors for cytokines, lymphokines, interferons
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K2317/00—Immunoglobulins specific features
- C07K2317/30—Immunoglobulins specific features characterized by aspects of specificity or valency
- C07K2317/31—Immunoglobulins specific features characterized by aspects of specificity or valency multispecific
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K2317/00—Immunoglobulins specific features
- C07K2317/60—Immunoglobulins specific features characterized by non-natural combinations of immunoglobulin fragments
- C07K2317/62—Immunoglobulins specific features characterized by non-natural combinations of immunoglobulin fragments comprising only variable region components
- C07K2317/622—Single chain antibody (scFv)
Definitions
- the present invention relates to a bispecific antibody that substitutes for a functional protein. More specifically, the present invention relates to a bispecific antibody that substitutes for the function of a ligand for a heteroreceptor, a bispecific antibody that substitutes for the action of a cofactor that enhances an enzymatic reaction, and a pharmaceutical composition containing the antibody as an active ingredient. . Background art
- Antibodies are attracting attention as pharmaceuticals because of their high stability in blood and low antigenicity. Among them are bispecific antibodies that can recognize two kinds of antigens simultaneously. Bispecific antibodies have been proposed for a long time. However, until now, only antibodies that merely connect two types of antigens, such as for the purpose of retargeting NK cells, macrophages, and T cells, have been reported (see Non-Patent Document 8). For example, MDX-210, which is undergoing clinical trials, is only a bispecific antibody that retargets FcrRI-expressing monocytes and the like to HER-2 / neu-expressing cancer cells. . Thus, to date, there have been no examples of using bispecific antibodies as an alternative to proteins that function in vivo.
- IL interleukin
- EP0 erythropoietin
- G-CSF growth hormone
- TP0 thrombopoietin
- GM-CSF macrophage collo stimulating factor
- M-CSF macrophage colony stimulating factor
- IFN-a IFN- / 3, IFN- ⁇ , etc.
- CNTF ciliary neurotrophic factor
- LIF Leukemia inhibitory factor
- CT-1 Oncostat in M
- TNF tumor necrosis factor
- a suitable anti-receptor antibody can be an antibody that can mimic receptor dimerization or quantification by a ligand.
- Monoclonal antibodies have already been reported that show a homodimeric TP0 receptor (MPL) (see Patent Document 1 and Non-Patent Document 1), an EP0 receptor, and a GH receptor as ligand substitutes. These antibodies are thought to exhibit a platelet count recovery effect during thrombocytopenia, an erythrocytosis effect during anemia, or a growth promotion effect for short stature, and are expected to be applied to pharmaceuticals. .
- Cofactors include, for example, tissue factor (TF), blood coagulation factor V (F.V), activated blood coagulation factor V (F.Va), blood coagulation factor VIII (F.VIII), Activated Blood Coagulation Factor VIII (F. Villa), Thrompomodulin (TM), Protein S (PS), Protein Z (PZ), Heparin, Complement C4b, Complement Regulatory Factor H), Membrane Coiactor Protein (MCP), Complement Receptor 1 (CRD, etc.).
- tissue factor TF
- F.V blood coagulation factor V
- F.Va activated blood coagulation factor V
- F.VIII blood coagulation factor VIII
- TM Thrompomodulin
- PS Protein S
- PZ Protein Z
- Heparin Complement C4b
- Complement Regulatory Factor H Membrane Coiactor Protein
- MCP Membrane Coiactor Protein
- CCD Complement Receptor 1
- F. Vin / F. Villa is a cofactor necessary for sufficient expression of F.IXa activity.
- Scheiilinger F et al. Have found that certain anti-F.IX / F.IXa antibodies have an effect of promoting F.IXa-induced F.X activation in chromogenic assays. Reference 2).
- the coagulation recovery ability of F.VIII-deficient plasma the coagulation recovery ability by this antibody alone is not shown, and the coagulation recovery ability is shown only when F.IXa is added exogenously.
- the present inventors have made intensive studies and succeeded in producing a bispecific antibody that substitutes for the function of a functional protein, leading to the present invention.
- Patent Document 1 U.S. Patent Application Publication No. 98/17364
- Patent Document 2 WO 01/19992
- Patent Document 3 U.S. Patent No. 4,474,893
- Patent Document 4 EP404, 097
- Patent Document 5 WO 93 / U161
- Patent Document 6 Japanese Patent Application No. 2002-112369
- Patent Document 7 Japanese Patent Application No. 2003-G12648
- Patent Document 8 JP-A-5-304992
- Patent Document 9 JP-A-2-145187
- Patent Document 10 JP-A-5-213775
- Patent Document 11 JP-A-10-165184
- Patent Document 13 Japanese Patent Application Publication No. 2002-518041
- Patent Document 14 Japanese Patent Publication No. 11-5G631Q
- Patent Document 15 JP-A-5-199894
- Patent Literature 16 Tokiohei 1G-511G85 (Patent Document 17) JP-A-5-184383
- Non-Patent Document 1 Deng D et al., "Blood”, 1998, Vol. 92, No. 6, p. 1981-1988
- Non-Patent Document 2 Nilsson IM et al., ⁇ J. Intern. Med. '', 1992,
- Non-Patent Document 3 Lofqvist T et al., ⁇ Intern. Med. J, 1997,
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- An object of the present invention is to provide a bispecific antibody that substitutes for the function of a functional protein. More specifically, it is an object of the present invention to provide a bispecific antibody that substitutes a ligand function for a receptor including a heteroreceptor molecule and a bispecific antibody that substitutes a function of a cofactor that enhances an enzymatic reaction.
- the present inventors have succeeded in separating an antibody that substitutes a ligand function for a type I interferon receptor composed of two types of molecules, mm and AM chains. That is, the present inventors have succeeded in separating, for the first time, a bispecific antibody having a function of substituting a ligand function for a receptor composed of a hetero molecule.
- the present inventors firstly developed a bispecific antibody having a function of substituting a functional protein for the first time. It can be said that it was developed.
- the present invention relates to a bispecific antibody that substitutes for a functional protein. More specifically, it relates to a bispecific antibody having a ligand function-substituting action on a receptor including a heteromolecule, and a bispecific antibody which substitutes a function of a cofactor for enhancing an enzymatic reaction. ,.
- the antibody of (6), wherein the type I interface receptor comprises an AR1 chain and an M2 chain;
- the antibody of (7) which has an action of substituting the function of interferon, which is a ligand for a type I interferon receptor;
- the antibody according to (8) comprising a variable region of an anti-AR1 chain antibody and a variable region of an anti-AR2 chain antibody; A variable region comprising the amino acid sequence of the following (a) in the anti-AR1 chain antibody; and a variable region comprising the amino acid sequence of any of the following (bl) to (blO) in the anti-AR2 chain antibody:
- variable region of the H chain has the amino acid sequence of SEQ ID NO: 1
- variable region of the L chain has the amino acid sequence of SEQ ID NO: 2.
- the H chain variable region is the amino acid sequence of SEQ ID NO: 7
- the L chain variable region is the amino acid sequence of SEQ ID NO: 8.
- variable region of the H chain is the amino acid sequence of SEQ ID NO: 9
- variable region of the L chain is the amino acid sequence of SEQ ID NO: 10
- the H chain variable region is the amino acid sequence of SEQ ID NO: 19
- the L chain variable region is the amino acid sequence of SEQ ID NO: 20
- the H chain variable region is the amino acid sequence of SEQ ID NO: 13
- the L chain variable region is the amino acid sequence of SEQ ID NO: 14.
- variable region of the H chain is the amino acid sequence of SEQ ID NO: 23
- variable region of the L chain is the amino acid sequence of SEQ ID NO: 24
- variable region of the H chain is the amino acid sequence of SEQ ID NO: 5
- variable region of the L chain is the amino acid sequence of SEQ ID NO: 6
- the H chain variable region is the amino acid sequence of SEQ ID NO: 17
- the L chain variable region is the amino acid sequence of SEQ ID NO: 18.
- the H chain variable region is the amino acid sequence of SEQ ID NO: 15
- the L chain variable region is the amino acid sequence of SEQ ID NO: 16.
- the H chain variable region is the amino acid sequence of SEQ ID NO: 21
- the L chain variable region is the amino acid sequence of SEQ ID NO: 22.
- variable region of the H chain is the amino acid sequence of SEQ ID NO: 11
- variable region of the L chain is the amino acid sequence of SEQ ID NO: 12
- a variable region consisting of the amino acid sequence of the following) in the anti-AR1 chain antibody and a variable region consisting of the amino acid sequence of any of the following (bl) to (b3) in the anti-AR2 chain antibody The antibody according to (9),
- variable region of the H chain is the amino acid sequence of SEQ ID NO: 3
- variable region of the L chain is the amino acid sequence of SEQ ID NO: 4.
- the H chain variable region is the amino acid sequence of SEQ ID NO: 25
- the L chain variable region is the amino acid sequence of SEQ ID NO: 26
- variable region of the H chain is the amino acid sequence of SEQ ID NO: 9
- variable region of the L chain is the amino acid sequence of SEQ ID NO: 10
- variable region of the H chain is the amino acid sequence of SEQ ID NO: 21
- variable region of the L chain is the amino acid sequence of SEQ ID NO: 22.
- composition according to (12) which is a pharmaceutical composition used for prevention and / or treatment of viral diseases, malignant neoplasms, and immune diseases.
- composition according to (13), wherein the viral disease is a disease that develops and / or progresses due to hepatitis C virus infection;
- composition according to [14] wherein the disease which develops and / or progresses due to hepatitis C virus infection is acute or chronic hepatitis C, cirrhosis, or liver cancer;
- the viral disease is B
- 9) a method for preventing and / or treating a viral disease, a malignant neoplasm or an immune disease, comprising the step of administering the composition according to any one of (2) to (2) to (11).
- (22) at least the antibody according to any of (2) to (11), or (1)
- proteolytic enzymes, substrates, and cofactors are blood coagulation / fibrinolysis-related factors
- the enzyme of blood coagulation / fibrinolysis-related factor is blood coagulation factor IX and / or activated blood coagulation factor IX
- the substrate is blood coagulation factor X
- the cofactor is blood coagulation factor VIII and / or Activated blood coagulation factor VIII, the antibody according to (25).
- a complementarity-determining region comprising the amino acid sequence of CDR3 of the following (al) or (a2) or a functionally equivalent complementarity-determining region in the anti-coagulation factor IX / IXa antibody:
- a blood coagulation factor X antibody comprising a complementarity-determining region consisting of the amino acid sequence of CDR3 described in any of the following (bl) to (b9) or a complementarity-determining region functionally equivalent thereto: [2] 3)
- the antibody according to any one of to 26, (a 1) the amino acid sequence of SEQ ID NO: 42 wherein the CDR3 of the H chain is
- a complementarity-determining region comprising the amino acid sequence of the following (al) or (a2) CDR of an anti-coagulation factor IX / IXa antibody or a functionally equivalent complementarity-determining region;
- a factor X antibody comprising a complementarity-determining region comprising the amino acid sequence of the CDR according to any one of the following (b1) to (b9) or a functionally equivalent complementarity-determining region: [23] -The antibody according to any one of (26),
- the composition according to [29] which is a pharmaceutical composition used for prevention and / or treatment of bleeding, a bleeding disorder, or a disease caused by bleeding; [31] bleeding or bleeding;
- the associated disease, or a disease caused by bleeding is a disease that develops and / or progresses due to decreased or defective activity of blood coagulation factor VIII and / or activated blood coagulation factor VIII, [30]
- composition according to [31], wherein the disease which develops and / or progresses due to a decrease or deficiency in the activity of blood coagulation factor VIII and / or activated blood coagulation factor VIII is hemophilia A, object,
- a disease that develops and / or progresses due to a decrease or deficiency in the activity of blood coagulation factor VIII and / or activated blood coagulation factor VIII may be associated with blood coagulation factor VIII and / or activated blood coagulation.
- the bispecific antibody (bispecific antibody) in the present invention is a molecule composed of two kinds of antibodies or antibody fragments having specificity for different antigens.
- the bispecific antibody is not particularly limited, but is preferably a monoclonal antibody.
- the bispecific antibody of the present invention is preferably a recombinant antibody produced using a gene recombination technique.
- a gene recombination technique See, for example, Borrebaeck CAK and Larrick JW, THERAPE UTIC MONOCLONAL ANTIBODIES, Clared in the United Kingdom by MACMILLA PUBLISHERS LTD, 1990.
- Recombinant antibodies are produced by cloning the DNA encoding them from hybridomas or antibody-producing cells such as sensitized lymphocytes that produce the antibodies, incorporating them into an appropriate vector, and introducing them into a host. Can be obtained.
- the antibody in the present invention may be an antibody fragment or a modified antibody thereof.
- Antibody fragments include diabody (Db), linear antibodies, single-chain antibody (hereinafter also referred to as scFv) molecules, and the like.
- Db diabody
- scFv single-chain antibody
- the “Fv” fragment is the smallest antibody fragment and contains a complete antigen recognition and binding site.
- the “Fv” fragment is a dimer (V H -V L dimer) in which one heavy (H) chain variable region (V H ) and light (L) chain variable region (V L ) are strongly linked by non-covalent bonds. It is.
- variable region Comp l ementari ty determining region; CDR
- V H - on the surface of the V L dimer form the antigen binding site.
- Six CDRs confer an antigen-binding site on the antibody.
- one variable region or half of an Fv containing only three antigen-specific CDRs
- it has a lower affinity than all binding sites, but has the ability to recognize and bind antigen.
- the Fab fragment (also referred to as F (ab)) further contains a constant region for an L chain and a constant region (CH1) for an H chain.
- Fab 'fragments differ from Fab fragments by having additional few residues from the carboxy terminus of the heavy chain CH1 region including one or more cysteines from the hinge region of the body.
- Fab'-SH refers to Fab 'in which one or more cysteine residues in the constant region has a free thiol group.
- F (a) fragments are produced by cleavage of disulfide bonds in cysteines at the hinge of the F (ab ') 2 pepsin digest. Other antibody fragments which are chemically linked are known to those skilled in the art.
- Diapody refers to a bivalent antibody fragment constructed by gene fusion (Holliger P et al., Proc. Natl. Acad. Sci. USA 90: 6444-6448 (1993), EP404, 097, W093 / 11161). Diapody is a dimer composed of two polypeptide chains, and each of the polypeptide chains cannot bind to the L chain variable region (V L ) and the H chain variable region (V H ) in the same chain. It is linked by a linker with a short position, for example, about 5 residues. When encoded on the same polypeptide chain, VH cannot form a single-chain variable region fragment due to the short linker between them, and forms a dimer. Will have.
- Single chain antibodies or scFv antibody fragments include the VH and regions of the antibody, which regions are present in a single polypeptide chain.
- Fv polypeptides further include a polypeptide linker between and the VL region, which allows the scFv to form the necessary structure for antigen binding (for a review of scFv, see Pluckthun See The Pharmacology of Monoclonal Ant ibodies, Vol. 113 (Rosenburg and Mooreed (Springer Verlag, New York) pp. 269-315, 1994).
- the linker in the present invention is not particularly limited as long as it does not inhibit the expression of the antibody variable regions linked to both ends.
- Bispecific IgG type antibodies can be secreted by hybrid ybridoma (auadroma) generated by fusing two hybridomas producing IgG antibodies (Milstein C et al. Nature 1983, 305: 537-540) .
- secretion can be achieved by co-expressing the genes of the L chain and the H chain, which constitute the two types of desired IgG, by introducing the genes into a total of four genes.
- Bispecific antibodies can also be made by chemically cross-linking Fab '.
- Fal) ' prepared from one antibody is maleimidated with ⁇ PDM (// i ⁇ phenylenedi-maleimide) and reacted with Fal)' prepared from the other antibody.
- bispecific F (ab ') 2 can be produced (Keler T et al. Cancer Research 1997, 57: 4008-4014).
- a method of chemically binding an antibody fragment such as Fab'-thionitrobenzoic acid (TNB) derivative to Fab'-thiol (SH) is known (Breiman M et al. Science 1985, 229: 81-83).
- Leucine zippers derived from Fos, Jun, etc. can be used instead of chemical crosslinking.
- Fos,; Tim forms homodimers, but takes advantage of the preferential formation of heterodimers.
- Bispecific F (ab ') 2 can be formed by mixing and reacting the monomer Fab'-Fos, Fab'-Jim reduced under mild conditions (Kostelny SA eta al. J of Immunology, 1992 , 148: 1547-53). This method is not limited to Fab ', but can be applied to scFv, Fv, etc.
- Bispecific antibodies can also be made in diapody.
- Bispecific diabodies are heterodimers of two cross-over scFv fragments.
- VH and V derived from two types of antibodies A and B are connected by a relatively short linker of about 5 residues.
- modified antibody examples include an antibody bound to various molecules such as polyethylene glycol (PEG).
- PEG polyethylene glycol
- the substance to be bound is not limited.
- Such a modified antibody can be obtained by subjecting the obtained antibody to chemical modification. These methods are well established in K in this area.
- the origin of the antibody of the present invention is not limited, such as a human antibody, a mouse antibody, and a rat antibody. Genetically modified antibodies such as chimeric antibodies and humanized antibodies may also be used.
- a target human antibody can be obtained by immunizing a transgenic animal having the entire repertoire of human antibody genes with a target antigen (International Patent application publication numbers W093 / 12227, W092 / 03918, W094 / 02602, W094 / 25585, W096 / 34096, W096 / 33735).
- a chimeric antibody is an antibody comprising the variable regions of the H and L chains of an antibody of an immunized animal and the constant regions of the H and L chains of a human antibody.
- DM which codes for the variable region of an antibody derived from an immunized animal, is ligated to DNA that codes for the constant region of a human antibody.
- a chimeric antibody can be obtained by integrating the gene into a current vector, introducing the vector into a host, and producing the host.
- a humanized antibody is a modified antibody, also called a reshaped human antibody.
- a humanized antibody is constructed by grafting the CDR of an antibody derived from an immunized animal into the complementarity determining region of a human antibody. Its general gene recombination technique is also known. Specifically, a DNA sequence designed to link the CDR of a mouse antibody and the framework region (FR) of a human antibody was prepared by preparing several DNA fragments having overlapping portions at the ends. It is synthesized from oligo nucleotides by PCR. The resulting MA is ligated to MA encoding the constant region of a human antibody, then integrated into an expression vector, and introduced into a host to produce it (European Patent Application Publication No.
- the present invention provides a bispecific antibody having a function of substituting a functional protein, and more preferably a bispecific antibody having a function of substituting a functional protein.
- a preferred embodiment of the antibody of the present invention is an antibody having a ligand function-substituting activity for a receptor containing a hetero molecule.
- the term "receptor containing a hetero molecule” means a receptor (multimer) composed of two or more different proteins (receptor molecules).
- the multimer is not limited by the number of proteins (receptor molecules) such as dimer, trimer and tetramer, but is preferably a dimer.
- a heteroreceptor indicates that the two constituent proteins (receptor molecules) are not identical.
- An antibody having a ligand function-substituting activity refers to an antibody having an agonist action for a certain receptor.
- the ligand-functional replacement antibody can perform the same function as a ligand by dimerizing the receptor at an appropriate distance and angle. That is, a suitable anti-receptor antibody can mimic receptor dimerization with a ligand, and can serve as a ligand function replacement antibody.
- the receptor of the present invention includes a cytokine heteroreceptor.
- Cytokine is usually used as a generic term for bioactive proteins that control the proliferation and differentiation of various blood cells, but may also refer to growth factors and growth-suppressing factors in cells including non-immune cells. Therefore, cytokins are released from cells and are a generic term for proteinaceous factors that mediate cell-cell interactions such as immunity, control of inflammatory response, antiviral action, antitumor action, regulation of cell growth and differentiation.
- cytokine acting on the heteroreceptor referred to in the present invention include IL-2, 3, 4, 5, 6, 7, 9, 10, 11, 12, 13, 15, colony stimulating factor (GM-CSF, etc.), interferon (IFN- ⁇ , i- ⁇ , IFN- ⁇ , etc.), CNTF, LIF,
- Oncostat in M, CT-1 and the like can be mentioned, preferably an interfering mouth, and particularly preferably a type I in evening ferron.
- Interferons include IFN-H, IFN-jS, IFN- ⁇ , IFN-te, and the like.
- IFN- ⁇ ; and IFN- / 3 have high homology, these two IFNs can react via the same receptor.
- IFN-HI, IFN- / 3 and IFN- are classified as Type I in Yuichi Feron.
- Examples of the type I interferon receptor include the AR1 chain (GenBank ACCESSION No: J0317K Reference: Uze G et al. Cel l 1990, 60: 225-34) and the M2 chain (GenBank ACCESSION No: U2958 Reference: Domanski P et al. J of Biological Chemistry 1995, 270: 21606-11, LutfaUa G et al. EMBO J 1995, 14: 5100-8).
- the method for obtaining the bispecific antibody with alternative ligand function of the present invention is not particularly limited, and may be obtained by any method.
- a bispecific antibody that substitutes for a ligand function for a heteroreceptor consisting of two types of receptor molecules (A chain and B chain) an anti-A chain antibody and an anti-B chain antibody are obtained.
- a bispecific antibody containing the H and L chains of the anti-A chain antibody and the H and L chains of the anti-B chain antibody is prepared.
- a plurality of anti-A chain antibodies and a plurality of anti-B chain antibodies are obtained, respectively, and it is preferable to use these to produce bispecific antibodies in as many combinations as possible.
- an antibody having a ligand function-substituting activity is selected.
- the bispecific antibody can be prepared by a known method, such as fusion of each antibody-producing hybridoma or introduction of an antibody expression vector into cells.
- Antibodies to the receptor can be obtained by methods known to those skilled in the art. For example, it can be prepared by immunizing an immunized animal with an antigen. Antigens that immunize animals include intact antigens that are immunogenic and incomplete antigens (including haptens) that are not immunogenic. In the present invention, a receptor whose ligand function-substituting antibody of the present invention is considered to act as a ligand is used as the antigen (immunogen).
- the receptor in the present invention is not particularly limited, but is preferably a heterodimer. As an animal to be immunized, for example, a mouse, a hamster, a macaque, and the like can be used.
- variable regions of the L chain and the H chain of the antibody are recovered from the immunized animal or cells of the animal. This operation can be performed by those skilled in the art using generally known techniques. Animals immunized with the antigen express antibodies to the antigen, especially in spleen cells.
- MRNA is prepared from the spleen cells of the animal, and the variable regions of the L and H chains can be recovered by RT-PCR using primers corresponding to the variable regions of the animal.
- an animal is immunized with each of the A and B chains of the receptor.
- the receptor to be used as the immunogen may be the entire protein constituting the receptor or a partial peptide of the protein.
- an immunogen used to immunize an animal an antigen that can be an antigen in some cases can be bound to another molecule to be a soluble antigen, and a fragment thereof can also be used in some cases. Good.
- a transmembrane molecule such as a receptor
- it is preferable to use these fragments eg, the extracellular region of the receptor.
- cells expressing the transmembrane molecule on the cell surface can be used as an immunogen.
- Such cells may be cells of natural origin (such as tumor cell lines) or cells constructed to express transmembrane molecules by recombinant techniques.
- MRNA is extracted from the spleen cells of this animal, and the cDNA of the L chain and H chain variable region is recovered by RT-PCR using a primer corresponding to the vicinity of the variable region.
- Primers corresponding to the CDR primers corresponding to the framework less diverse than CDR or signal sequence and CH1 Moshiku, can be used primers corresponding to the L chain constant region (C L).
- Lymphocytes can also be immunized in vitro. Using this, a library displaying sc'Fv or Fab is constructed.
- a bispecific antibody can be obtained by introducing an anti-A chain antibody expression vector and an anti-B chain antibody expression vector into the same cell and expressing the antibody.
- screening it is also possible to perform screening using a similar library using mRNA derived from peripheral blood mononuclear cells, spleen tonsils, and the like of human non-immunized animals.
- Selection of an antibody having a ligand function-substituting activity can be performed, for example, by the following method.
- the cells usually express a heteroreceptor on which the antibody can act as an agonist on the cell surface, and the receptor emits a signal when bound to a ligand.
- the cells used in the above method are preferably cells that can proliferate in a ligand-dependent manner of a receptor (ligand-dependent proliferating cells).
- the receptor usually emits a cell proliferation signal by binding to a ligand.
- the receptor may be used in the above method by fusing the receptor with a receptor of the type that emits a cell proliferation signal to form a so-called chimeric receptor. Can be.
- the chimeric receptor emits a cell proliferation signal when bound to a ligand.
- the receptor suitable for constructing a chimeric receptor by fusing it with a receptor is not particularly limited as long as it is a type of receptor that emits a cell proliferation signal, but is usually a membrane protein, and more preferably a membrane protein.
- the extracellular domain is a receptor fragment having a ligand binding function
- the intracellular domain is a receptor fragment having a signal transduction function.
- Receptors used for the intracellular region include GH receptor, G-CSF receptor, MPL, EP0 receptor, c-Kit, Flt-3, IL-2 receptor, IL-3 receptor, IL-5 receptor, GM-CSF receptor and the like can be mentioned.
- a chimeric receptor in which the extracellular region is a ligand receptor fragment and the intracellular region is a G-CSF receptor fragment is expressed.
- the ligand-dependent proliferating cell Ba / F3 can be shown.
- Other cells that can be used in the above method include, for example, NFS60, FDC-PK FDC-P2, CTLL-2, DA-1, KT-3 and the like.
- the obtained antibody can be purified to homogeneity.
- the separation and purification of the antibody may be performed by the separation and purification methods used for ordinary proteins.
- antibodies can be separated and purified.
- chromatography columns such as affinity chromatography, filters, ultrafiltration, salting out, dialysis, SDS polyacrylamide gel electrophoresis, isoelectric focusing, etc.
- antibodies can be separated and purified.
- chromatography columns such as affinity chromatography, filters, ultrafiltration, salting out, dialysis, SDS polyacrylamide gel electrophoresis, isoelectric focusing, etc.
- the antibody of the present invention is, for example, an antibody having a ligand function-substituting activity for a type I interferon receptor containing an AR1 chain and an AR2 chain
- the antibody preferably comprises a variable region in an anti-AR 1 chain antibody, And a variable region in an anti-AR2 chain antibody.
- the interferon function-substituting antibody was prepared by the following method. IL-3 dependent mouse pro-B cell line Ba /, which expresses the receptor molecule of type I interferon receptor AR1 chain and chimeric receptor in the extracellular region of M2 chain and the intracellular region of G-CSF receptor, respectively F3 was established. Each cell was immunized intraperitoneally with BALB / c.
- RNA was extracted from the spleen of an immunized mouse with an increased antibody titer, and a scFv was synthesized by RT-PCR to construct a scFv-displaying phage library.
- the AR1 chain-expressing Ba / F3 immunized mouse The phage library derived from the spleen of the mouse and the biotinylated soluble AR1 chain were mixed, and the bound phages were concentrated by the panning method of capturing with streptavidin magnetic beads. Phage displaying anti-AR1 chain antibody was selected by phage ELISA using soluble AR1 chain.
- an anti-AR2 chain antibody phage was selected using a library phage derived from the spleen of a soluble AR2 chain and an AR2 / chain-expressing Ba / F3 immunized mouse. Antibodies were selected that differ in the amino acid sequence of the CDR3 of the H chain, which is said to be most involved in the specificity of the antibody.
- the scFv was inserted between the signal sequence for animal cells and CHI-hinge-CH2-CH3 to prepare an scFv-CHI-Fc expression vector.
- Antibodies against the AR1 and AR2 chains were introduced into cells in various combinations to express bispecific antibodies.
- BaF3-ARG was established by introducing an expression vector for a chimeric molecule of the extracellular region of each of the l-chain and AR2 chain and the intracellular region of the G-CSF receptor into Ba / F3. The cells proliferated in an IFN-dependent manner. Bispecific antibodies were selected that were combinations of antibodies that could support the growth of BaF3-ARG.
- Daudi cells are human ⁇ cell lines highly sensitive to the cytostatic activity of IFN- ⁇ .
- the bispecific antibody selected above was added to Daudi cells, and it was confirmed that proliferation was inhibited in the same manner as IFN- ⁇ .
- Examples of the antibody include, but are not particularly limited to, an antibody including any of the following variable regions of an anti-AR1 chain antibody and any of the following variable regions of an anti-AR2 chain antibody: be able to.
- AR2 chain antibody variable regions AR2-37, A2-11, AR2-13, A2-45, AR2-22, AR2-43, AR2-40, AR2-14, AR2-44, AR2-33, AR2-31
- amino acid sequences of V H and of each of the above variable regions are shown in SEQ ID NOs: 1 to 26 (the relationship between V H and of each variable region and SEQ ID NOs is shown in Table 1).
- the partner anti-AR2 chain antibody is preferably AR2-13, AR2-31, or AR2-44, and when the anti-AR1 chain antibody force is 41, the partner is
- the anti-AR2 chain antibody is AR2-11, AR2-13, AR2-14, AR2-22, AR2-33, AR2-37, AR2-40, AR2-43, A2-44, or AR2-45 Is preferred.
- M2-13 and AR2-44 are capable of partnering with both ⁇ -41 and AR1-24 antibodies. Antibodies that form such pairs are also included in the present invention.
- bispecific antibody having a function of substituting the functional protein of the present invention
- a bispecific antibody that substitutes for a function of a cofactor that recognizes both an enzyme and a substrate of the enzyme is used. It is.
- the cofactor in the present invention is not particularly limited as long as it acts on the enzyme and can enhance the enzyme reaction.
- Examples of the cofactor in the present invention include a cofactor for a protease.
- Specific examples of proteolytic enzyme cofactors include cofactors (F.VIII / F.Villa, PZ, TM, TM / PS system) in blood coagulation-fibrinolysis-related factors.
- Cofactors for complement reaction C4b, MCP, CR1, factor H
- the cofactor F. Villa enhances the activation of F.Xa by F.IXa by binding to both F.IXa and F.X.
- Some bispecific antibodies that recognize both the enzyme F.IXa and the substrate F.X have an action of enhancing F.X activation. It is considered that some of such anti- #: have an action that substitutes for the action function of cofactor F.VIII / F. Villa.
- Cofactor PZ enhances ZPI-induced F.Xa inhibition by binding to serpin family ZPI and F.Xa. That is, it is considered that among the bispecific antibodies that recognize both ZPI and F.X / F.Xa, those that have an action to substitute the function of PZ exist.
- Cofactor TM enhances the activation of TAFI by thrombin. That is, it is considered that among the bispecific antibodies that recognize both thrombin and TAFI, there are those that have an action of substituting the function of TM.
- the TM / PS system enhances the activation of PC by thrombin. That is, it is considered that some bispecific antibodies that recognize both thrombin and PC substitute for the function of the TM / PS system.
- C4b has the effect of promoting the decomposition of C2 by Cls. In other words, it is considered that some bispecific antibodies that recognize both Cls and C2 substitute for the function of C4b.
- Complement Regulatory Factor H MCP and CRl have C3b decomposition promoting action by Complement Regulatory Factor I. That is, among the bispecific antibodies that recognize both Co-lenient Regulatory Factor I and C3b,
- F.VIII / F.Villa F. VI II / F. Vil la is subject to limited degradation by proteolytic enzymes such as thrombin, but any form is possible as long as it has a cofactor activity of F. Vin / R VII Ia. Also, mutation ?. ⁇ 111 111 & Also, regarding F.VIII / F.Vil la artificially modified by genetic recombination technology,
- the method for obtaining the bispecific antibody alternative to the cofactor function of the present invention is not particularly limited, and may be obtained by any method.
- immunized animals are immunized with enzyme A and substrate B, respectively, to obtain anti-enzyme A antibodies and anti-substrate B antibodies.
- a bispecific antibody containing the H chain and L chain of the anti-enzyme A antibody and the H chain and L chain of the anti-substrate B antibody is prepared.
- a plurality of anti-enzyme A antibodies and a plurality of anti-substrate B antibodies are obtained, respectively, and it is preferable to use these to produce as many combinations of bispecific antibodies as possible.
- an antibody having a cofactor function-substituting activity is selected.
- Antibodies to enzymes or substrates can be obtained by methods known to those skilled in the art. For example, it can be prepared by immunizing an immunized animal with an antigen. Antigens that immunize animals include complete immunogenic antigens and incomplete non-immunogenic antigens (including haptens). In the present invention: An enzyme or a substrate which is considered to act as a cofactor by the cofactor function-substituting antibody of the present invention is used as the antigen (immunogen). As an animal to be immunized, for example, a mouse, a hamster, a rhesus monkey, or the like can be used. Immunization of these animals with an antigen can be carried out by those skilled in the art by well-known methods.
- variable regions of the L chain and the H chain of the antibody are recovered from the immunized animal or the cells of the animal.
- This operation can be performed by those skilled in the art using generally known techniques.
- Animals immunized with the antigen express antibodies to the antigen, especially in spleen cells. Therefore, for example, mRNA can be prepared from spleen cells of an immunized animal, and the variable regions of the light chain and light chain can be recovered by RT-PCR using primers corresponding to the variable region of the animal.
- an animal is immunized with each of an enzyme and a substrate.
- the enzyme or substrate used as an immunogen may be the whole protein or a partial peptide of the protein.
- exempt animals As an immunogen used for immunization, it is also possible to bind an antigen which may be an antigen in some cases to another molecule to form a soluble antigen, or to use a fragment thereof in some cases.
- the niNA is extracted from the spleen cells of the immunized animal, and the cDNA of the L chain and H chain variable region is recovered by RT-PCR using a primer corresponding to the vicinity of the variable region.
- a library that presents scFv or Fab is constructed using this.
- An antigen-binding antibody clone is enriched and cloned by panning, and an antibody expression vector is constructed using the variable region.
- the bispecific antibody can be obtained by introducing the anti-enzyme antibody expression vector and the anti-substrate antibody expression vector into the same cell and expressing the antibody. Screening was performed using a similar library of mRNA derived from peripheral blood mononuclear cells, spleen, tonsils, etc. of non-treated animals. It is also possible.
- An antibody having a cofactor function-substituting activity can be selected, for example, by the following method.
- reaction system containing the enzyme and the substrate, and select the enzyme based on the increase in the enzyme activity (substrate resolution) caused by the addition of the antibody.
- the obtained antibody can be purified to homogeneity.
- the separation and purification of the antibody may be performed by the separation and purification methods used for ordinary proteins. For example, chromatography columns such as affinity chromatography, filters, ultrafiltration, salting out, dialysis, SDS polyacrylamide gel electrophoresis, isoelectric focusing, etc. If selected and combined, antibodies can be separated and purified (Ant ibodies: A
- the bispecific antibody of the present invention for example, when the alternative cofactor is F.VIII / F.Villa, that is, when the combination of the enzyme and the substrate is a blood coagulation / fibrinolysis-related factor, F.IXa and F.IX.
- F.IXa blood coagulation / fibrinolysis-related factor
- F.IXX blood coagulation / fibrinolysis-related factor
- X it preferably has a structure including a variable region in an anti-F, IXa antibody and a variable region in an anti-F.X antibody.
- the F.VIII / F.Villa function alternative bispecific antibody of the present invention was prepared by the following method. Mice were immunized subcutaneously with commercially available F.IXa and F.X, respectively. Splenocytes were isolated from the spleen of the immunized mouse with an increased antibody titer, and fused with mouse myeloma cells to produce a hybridoma. Hybridomas that bind to the antigen (F.IXa, F.X) were selected, and the variable regions of the L and H chains were recovered by RT-PCR using primers corresponding to the variable regions. The L chain variable region was incorporated into an L chain expression vector containing and the H chain variable region was incorporated into an H chain expression vector containing an H chain constant region.
- the expression vector for the anti-F.IXa antibody H chain, L chain
- the expression vector for the F.X antibody H chain, [chain]
- Two types of antibodies are expressed. Specific antibodies were obtained. Regarding the obtained bispecific antibodies, F. XIa (F. IX activating enzyme), F. IX (F. X activating enzyme), F. X and F. Xa synthetic substrates (S-2222) ), A measuring system composed of phospholipids,
- the activity of substituting F.VIII / F.Villa (a cofactor for F.X activation by F.IXa) was evaluated. Based on the results, bispecific antibodies having F.VIII / F.Villa replacement activity were selected. Regarding the bispecific antibodies selected above, the coagulation recovery ability was measured using a coagulation measurement system (APTT) using F.VIII-deficient human plasma. As a result, it was confirmed that a bispecific antibody having an ability to recover coagulation against F.VIII-deficient human plasma was obtained.
- APTT coagulation measurement system
- the H chain CDR3 of the antibody of the present invention is not particularly limited.
- the complementarity-determining region consisting of the amino acid sequence of the X-chain H3 CDR3 sequence (SEQ ID NO: 42) or the XT04 H-chain CDR3 sequence (SEQ ID NO: 46) of It has an equivalent complementarity determining region, and has an H04 CDR3 sequence of SB04, SB05, SB06, SB07, SB2K SB30, SB34, SB38 or SB42 (SEQ ID NOS: 50, 54, 58, 62, 66, respectively) 70, 74, 78 or 82), or has a complementarity-determining region functionally equivalent thereto.
- the above-mentioned antibody of the present invention is, as a specific example, composed of the amino acid sequence of either the X-chain H chain CDR sequence (SEQ ID NOS: 40 to 42) or the XT04 H-chain CDR sequence (SEQ ID NOs: 44 to 46)
- One having a complementarity-determining region or a functionally equivalent complementarity-determining region and the H chain CDR sequence of SB04, SB05, SB06, SB07, SB2K SB30, SB34, SB38 or SB42 (SEQ ID NOS: 48 to 50) , 52-54, 56-58, 60-62, 64-66, 68-70, 72-74, 76-78 or 80-82), or a complementarity determining region comprising Antibodies can be suitably shown in combination with those having a functionally equivalent complementarity determining region.
- amino acid sequences of the heavy chain variable regions of XB12, XT04, SB04, SB05, SB06, SB07, SB2L SB30, SB34, SB38 and SB42 described in the present invention are shown in SEQ ID NOs: 39, 43, 47, 51, 55, 59, 63 , 67, 71, 75 and 79.
- the constant region is not particularly limited, and a constant region known to those skilled in the art can be used.
- a constant region known to those skilled in the art can be used.
- the Sequences of proteins of immunological interest (1991), US Department of Health and Human Services.Public Health Service National Institutes of Health, and An efficient route to human bispecific IgG, (1998) .Nature Biotechnology vol. 16, 677-681. Can be used.
- One embodiment of the antibody in the present invention is to have a ligand function replacement action.
- the antibody of the present invention is expected to be an effective drug against diseases caused by a decrease in the activity (function) of the receptor on which the antibody acts.
- the alternative ligand function of the antibody of the present invention is IFN-a /) S
- examples of the disease include a viral disease, a malignant neoplasm, and an immune disease.
- Viral diseases include, for example, diseases caused and / or developed by the hepatitis C virus, and more specifically, examples include acute hepatitis C, chronic hepatitis C, cirrhosis, and liver cancer. it can.
- Chronic hepatitis C is a chronic inflammatory disease caused by the host's immune response to hepatitis C virus-infected cells. As the symptoms progress, liver function gradually decreases, leading to liver cirrhosis and liver cancer at the end. Chronic hepatitis C patients are treated with Interferon-HI / 3 to eliminate hepatitis C virus.However, due to the short half-life in blood, daily administration is necessary. Burden is considerable. Accordingly, there has been a demand for a drug having an interferon-// 3 action and having excellent sustainability.
- Examples of other viral diseases include, for example, diseases caused and / or developed by hepatitis B virus, and more specifically, acute hepatitis B, chronic hepatitis B, cirrhosis, and liver cancer. Can be exemplified.
- Malignant neoplasms include chronic myelogenous leukemia, malignant melanoma, multiple myeloma, renal cancer, glioblastoma, medulloblastoma, astrocytoma, hairy cell leukemia, AIDS-related sarcoma, skin T cells Examples include lymphoma and non-Hodgkin's lymphoma. Examples of the immune disease include multiple sclerosis.
- the antibody of the present invention has an action of substituting the function of a cofactor, so that the antibody of the present invention can be used for a disease caused by reduced activity (function) of the cofactor. It is expected to be an effective drug.
- the cofactor that substitutes for the antibody of the present invention is a blood coagulation / fibrinolysis-related factor
- the above diseases include, for example, bleeding, Diseases involving blood or diseases caused by bleeding can be mentioned.
- F.VIII / F.Villa, F.IX / F.IXa, and F.XI / F.XIa are known to cause a dysfunction or deficiency, which causes hemorrhagic disorders called hemophilia.
- hemophilia bleeding disorders due to congenital F.VIII / F.VIIIa hypofunction or deficiency are called hemophilia A. If hemophilia A bleeds, F.VIII replacement therapy is given.
- prophylactic administration of F.VIII preparations may be performed if frequent intra-articular bleeding occurs on the day of intense exercise or excursion, or if the patient is classified as severe hemophilia (Non-patent Document 2 and 3).
- the prophylactic administration of this F.VIII preparation has become very widespread in recent years because it drastically reduces bleeding episodes in hemophilia A patients. Reducing bleeding episodes not only reduces the risk of fatal and non-fatal bleeding and the associated pain, but also prevents haemophilic joint damage due to frequent joint bleeding. As a result, it greatly contributes to improving Q0L of hemophilia A patients.
- the F.VIIi preparation is administered intravenously.
- administration to young patients is further complicated by the narrow venous vein used for administration.
- hemophilia A inhibitor patients develop bleeding, they are usually treated with neutralization therapy using large doses of F.VIII or bypass using complex lex concentrate or F.Vila. Therapy is administered.
- neutralization therapy administration of large amounts of F.VIII preparations may, on the contrary, increase titers of inhibitory (anti-F.VIII antibodies).
- Another problem with bypass therapy is the short-lived half-life (about 2 to 8 hours) of conjugates and F. Vila.
- their mechanism of action is independent of the function of F.VIII / F.Villa, that is, the function of catalyzing the activation of F.Xa by F.IXa. In some cases, they cannot respond, resulting in a non-response.
- haemophilia A inhibitors often do not have a sufficient hemostatic effect compared to non-inhibitor hemophilia A patients.
- bleeding disorders related to F.VIII / F.VIIIa include hemophilia, acquired hemophilia having anti-F.VIII autoantibodies, and bleeding caused by abnormal or defective vWF function.
- Onville-brand disease is known.
- vWF is not only required for platelets to adhere properly to the subendothelial tissue at the site of injury to the vessel wall, but also forms a complex with F.VIII and maintains normal levels of F.VI II in plasma It is also necessary. In patients with von Willebrand disease, these functions are impaired, leading to abnormal hemostasis.
- C4b binding protein C4bp
- PS protein S
- C4bp dissociates C2b from the C4b C2b complex and has the effect of eliminating the aPC coiactor activity of PS.
- C4bp has a regulatory effect on the complement system and the blood coagulation system.
- Bispecific antibodies to C4b and PS are thought to have an action to replace the action of C4bp.
- C4bp also acts as a cofactor for the degradation of C4b by factor I. Therefore, bispecific antibodies to factor I and C4b are also considered to have an action to replace the action of C4bp.
- the present invention provides a pharmaceutical composition comprising the antibody of the present invention as an active ingredient.
- the antibody of the present invention is an antibody having an activity of substituting interferon for a cytokine receptor
- the antibody is considered to have a cytodynamic effect. Therefore, the antibody is expected to be a drug (pharmaceutical composition) or drug having an antiviral action, an antitumor action, a cell growth and differentiation regulating action.
- antibodies that substitute for the function of IL-2 replace the function of drugs (pharmaceutical compositions) or drugs that have immunostimulatory / anti-tumor effects by differentiation and activation of T cells and NK cells, and the function of IL-3 Antibodies that promote the recovery of blood cells by proliferating hematopoietic progenitor cells (pharmaceutical compositions) or drugs. Antibodies that substitute for IL-4 function have antiallergic effects by inducing T (humoral immunity).
- compositions or drugs that have the function of IL-5 are B cells • Eosinophil proliferation • Immunostimulation by inducing differentiation • Pharmaceuticals (pharmaceutical compositions) or drugs that have antitumor activity -Antibodies that substitute the function of 6 are pharmaceuticals (pharmaceutical compositions) or drugs that have the effect of stimulating platelet production, and antibodies that substitute the function of IL-7 have immunostimulatory activity due to proliferation of T cells and B cells.
- Pharmaceuticals (pharmaceutical compositions) or drugs, antibodies that replace the function of IL-9 replace mast cell proliferation-drugs (pharmaceutical compositions) or drugs that promote hematopoietic recovery by hematopoiesis, replace the function of IL-10
- Antibodies replace drugs (pharmaceutical compositions) or drugs with immunosuppressive action
- IL-11 function Antibodies replace drugs (pharmaceutical compositions) or drugs with platelet production stimulating action
- IL-12 function Antibodies that stimulate Thl (cellular immunity) induce immunostimulation.
- Drugs that have antitumor activity (pharmaceutical compositions) or antibodies that substitute for IL-15 function are activated by NK cell activation.
- compositions or drugs that have antitumor activity, or antibodies that substitute for the function of GM-CSF are pharmaceuticals (pharmaceutical compositions) or drugs that promote leukocyte recovery after chemotherapy or bone marrow transplantation, or CNTF of Antibodies that replace the function are drugs (pharmaceutical compositions) or drugs that have an anti-obesity effect, and antibodies that replace the function of LIF are drugs (pharmaceutical compositions) or drugs that have a platelet production stimulating / blood cholesterol-lowering effect
- Antibodies that substitute the function of Oncostat in M are drugs (pharmaceutical compositions) or drugs with hematopoietic promoting action, and antibodies that replace the function of CT-1 are drugs (pharmaceutical compositions) or drugs with cardioprotective action It is expected.
- the antibody of the present invention is an antibody that recognizes F.IX or both F.IXa and F.X and that substitutes for the function of F.VIIIa
- the antibody may be used for bleeding or bleeding. It is expected to be a drug (medicinal composition) or drug for the prevention or treatment of diseases associated with bleeding or diseases caused by bleeding.
- antibodies that bind to ZPI and F.X to replace the function of PZ are drugs (pharmaceutical compositions) or drugs that have an antithrombotic effect
- antibodies that replace the function of TM by binding to thrombin and TAFI are It is expected to be a drug (pharmaceutical composition) or drug that promotes hemostasis, or a drug (pharmaceutical composition) or drug that binds to thrombin and PC and replaces the function of the PS / TM system. .
- an antibody that substitutes for the action of C4b should be a drug (pharmaceutical composition) that has SLE onset suppression effect. Is expected to be a drug. Since deficiency of factor H causes suppurative infection and autoimmune glomerulonephritis, antibodies that substitute for the action of factor H become pharmaceuticals (pharmaceutical compositions) or drugs that have the effect of suppressing the onset of these diseases It is expected.
- an antibody that substitutes for the action of C4bp is expected to be a drug (pharmaceutical composition) or drug having an action to suppress the onset of Behcet's disease.
- the pharmaceutical composition containing the antibody of the present invention used as an active ingredient for therapeutic or prophylactic purposes may be mixed, if necessary, with a suitable pharmaceutically acceptable carrier, medium or the like which is inactive against them. It can be formulated. For example, sterile water or saline, stabilizers, excipients, antioxidants (ascorbic acid, etc.), buffers (phosphoric acid, citric acid, other organic acids, etc.), preservatives, surfactants (PEG , Awake, etc.), chelating agents (EDTA, etc.), binders and the like.
- aqueous solution for injection for example, physiological saline
- an isotonic solution containing glucose and other adjuvants for example, D-sorbyl, D-mannose, D-manni!
- alcohols eg, ethanol
- polyalcohols eg, propylene glycol, PEG
- nonionic surfactants eg, Polysorbate 80, HC0-50
- the antibody of the present invention may be encapsulated in a microcapsule (microcapsule such as hydroxymethylcellulose, gelatin, poly [methylmethacrylic acid]), or a colloid drug delivery system (ribosome, albumin microsphere). , Microemulsions, nanoparticles and nanocapsules). Remington's Pharmaceutical Science 16th edition ", Oslo Ed. (1980) reference). Furthermore, a method for converting a drug into a sustained-release drug is also known and can be applied to the antibody of the present invention (Langer et al., J. Biomed. Mater. Res. 15: 267-277 (1981); Langer, Chemtech. 12: 98-105 (1982); U.S. Pat. No.
- the dosage of the pharmaceutical composition of the present invention is determined by a physician in consideration of the type of dosage form, the administration method, the age and weight of the patient, the symptoms of the patient, the type of disease and the degree of progression, etc. In general, for adults, 0.1 to 2000 mg per day can be orally administered in one or several divided doses. More preferably l-1000 mg / day, even more preferably 50-500 mg / day, most preferably 100-300 mgZ day. These doses vary depending on the weight and age of the patient, the administration method, and the like, but those skilled in the art can appropriately select an appropriate dose. It is preferable that the administration period is appropriately determined according to the healing process of the patient.
- Administration methods include direct administration using naked plasmids, packaging in ribosomes, retrovirus vectors, adenovirus vectors, vaccinia virus vectors, box virus vectors, adenovirus-related vectors, and HVJ. It can be formed as a vector such as a vector (see Adolph “Virus Genome Method”, CRC Press, Florid (1996)) or coated on a bead carrier such as colloidal gold particles (W093 / 17706) Etc.).
- the antibody may be administered by any method as long as the antibody is expressed in vivo and can exert its action.
- injection, infusion, or gas-induced particle bombardment e.g., via an intravenous, intraperitoneal, subcutaneous, intradermal, adipose tissue, adipose tissue, mammary tissue, inhalation or intramuscular route
- a sufficient amount is administered by a method such as through a gun or a mucosal route such as nasal drops).
- the cells are administered to blood cells and bone marrow-derived cells using ribosome transfection, particle bombardment (US Pat. No. 4,945,050), or viral infection. May be administered again to an animal to administer the gene encoding the antibody of the present invention.
- the present invention also provides a method for preventing and / or treating bleeding, a disease associated with bleeding, or a disease caused by bleeding, comprising a step of administering the antibody or the composition of the present invention.
- Administration of the antibody or the composition can be performed, for example, by the method described above.
- the present invention also relates to the use of the antibody of the present invention for producing the (pharmaceutical) composition of the present invention.
- the present invention provides a kit for use in the above method, comprising at least the antibody or the composition of the present invention.
- the kit can be packaged with a syringe, a needle, a pharmaceutically acceptable medium, an alcohol swab, a bandage, or instructions describing the method of use.
- FIG. 1 shows the insertion region of PCDNA4-g4H.
- FIG. 2 is a diagram showing insertion regions of PCDNA4-g4L and pIND-g4L.
- FIG. 3 is a diagram showing the insertion region of pIND-g4H.
- Figure 4 shows anti-F.IXa antibody XB12 and anti-F.X antibody SB04, SB2 SB42, SB38, SB30, SB07, SB05, SB06, and SB34 prepared anti-F.IXa / anti-F.X bispecific antibodies. The result of measuring F. Vila-like activity is shown. The concentration of the antibody solution is lO ⁇ z g / niL (final concentration
- bispecific antibodies showed an increase in F.VI I Ia-like activity, XB12 / SB04, XB12 / SB2K XB12 / SB42, XB12 / SB38 XB12 / SB30, XB12 / SB07, XB12 / SB05, XB12 The activity was strong in the order of / SB06 and XB12 / SB34.
- Figure 5 shows the anti-F.IXa / anti-F.X bispecific antibody or XT04 prepared with anti-F.IXa antibody ⁇ 04 and anti-F.X antibody SB04, SB2K SB42, SB38, SB30, SB07, SB05, SB06, SB34.
- Fig. 9 shows the results of measuring F.VIIIa-like activity of the antibody.
- Antibody solution concentration is 10 g / mL (Final concentration lg / mL). Result, XT04 / SB04, XT04 / SB2K XT04 / SB42,
- FIG. 6 shows the results of measuring F. Villa-like activity at various concentrations for XB12 / SB04, which had the highest activity in FIG. As a result, XB12 / SB04 showed an increase in F. Villa-like activity in a concentration-dependent manner.
- Figure 7 shows the measurement of plasma coagulation time (APTT) in the presence of XB12 / SB30, XB12 / SB07, XB12 / SB05, XB12 / SB06, XB12 / SB34.XB12 / SB04, XB12 / SB2K XB12 / SB42, XB12 / SB38.
- the concentration of the antibody solution is 3.4 / ig / mL for XB12 / SB06, and 20 ig / mL for all others.
- Result XB12 / SB04, XB12 / SB2K XB12 / SB42, XB12 / SB38,
- XB12 / SB30, XB12 / SB07, XB12 / SB05, XB12 / SB06, and XB12 / SB34 showed an effect of shortening the clotting time as compared to the absence of the antibody.
- Figure 8 shows the plasma clotting time (APTT) measured in the presence of XT04 / SB04, XT04 / SB2K, XT04 / SB42, XT04 / SB38, XT04 / SB30, XT04 / SB07, XT04 / SB05, XT04 / SB06, and XT04 / SB34. The results are shown.
- the concentration of the antibody solution is 10 ig / mL for XT04 / SB06, and 20 / ig / mL for the others.
- FIG. 9 shows the results of measuring the coagulation time at various concentrations for XB12 / SB04, which had the highest effect of reducing the coagulation time (APTT) in FIGS. 7 and 8. As a result,
- XB12 / SB04 showed a coagulation time shortening effect in a concentration-dependent manner.
- FIGS. 10 to 13 show the ability of the antibody against pISRE-Luc-transfected K562 cells to activate ISRE.
- the mouth indicates IFN-o? 2a, and the hata indicates the combination of anti-AR1 chain and anti-AR2 chain bispecific antibodies in the figure.
- the antibody is dose-dependent with the same specific activity per molecule as IFN
- FLAG At the C-terminus of the extracellular region of each of the human AR1 and AR2 chains, FLAG (AR1FLAG,
- AR2FLAG or His6 (face is, AR2His) -tagged soluble receptor expression vectors were introduced into CH0 cells and purified from the culture supernatant using affinity columns.
- High expression cells were established by introducing a chimeric molecule expression vector of the extracellular region of the human AR1 chain and the intracellular region of the G-CSF receptor into the mouse pro-B cell line Ba / F3.
- PolyA W RNA was extracted from the spleen of the immunized mouse, scFv was synthesized by RT-PCR, and a phagemid library in which the scFv was expressed as a fusion protein with the gene 3 of f phage was constructed (J. I band un. Methods , 201, (1997), 35-55).
- the phage was precipitated by centrifugation at 0,800 ⁇ g for 30 minutes and suspended in 5 mL PBS.
- AR1FLAG and AR2FLAG prepared in Example 1 No- Weigh Premeasured NHS- PE0 4 - was Piochin labeled using Biot in Microtu bes (Pierce). 100 pmol of a biotin-labeled AR1FLAG or AR2FLAG was added to one of the phage libraries and contacted with the antigen for 60 minutes. 600 L of Streptavidin MagneSphere (Promeg a) washed with 5% M-PBS (PBS containing 5% skim milk) was added and allowed to bind for 15 minutes.
- the beads were washed three times with 1 mL of PBST (PBS containing 0.1% Tween-20) and PBS.
- the peas were suspended in 0.8 mL of 0.1 mol / L glycine / HC1 (pH 2.2) for 5 minutes to elute the phage.
- Lmol / L IPTG, 10 "piu helper phage (VCSM13) was added to 10 mL of the culture, and the mixture was allowed to stand at 37 ° C for 30 minutes.
- the cells were resuspended in 2xYTAG lOOmL containing 25 g / mL kanamycin.
- the cells were cultured at 30 ° C for 10 hours
- the culture supernatant was collected by centrifugation, mixed with 20 mL PEG-NaCl, and allowed to stand at 4 ° C for 20 minutes.
- the single colony described above was inoculated into 150 / zL 2xYTAG and cultured at 30 ° C overnight. After inoculating 5 L of this into 500 L of 2xYTAG and culturing at 37 ° C for 2 hours, add 2 ⁇ YTAG containing 2.5 ⁇ 10 iu of helper phage and 0.3 L of lmol / L IPTG to IOOL, and add at 37 ° C. Let stand for 30 minutes. Subsequently, the cells were cultured overnight at 30 and the centrifuged supernatant was subjected to ELISA. Load StreptaWel 96 microtiter plate (Roche) with 1.
- An expression vector pCAGGss-g4CHhetero IgG4 capable of inserting the E. coli was constructed.
- an amino acid substitution to the CH3 part of IgG4 was prepared with reference to IgGl knobs-into-holes (Ridgway JB et al. Protein in Engineering 1996, 9: 617-621).
- Type A is a substitution of Y349C and T366W.
- Type B is a substitution of E356 T366S, L368A, Y407V.
- a substitution (-ppcpScp- ⁇ -ppcpPcp-) was introduced into both hinges.
- a type was constructed using the signal sequence of human IL-3, and B type was constructed using the signal sequence of human IL-6 (pCAGG-IL3SS-g4CHPa, pCAGG-IL6ss-g4CHPb).
- the PCR product of the scFv region of the clone selected from the nucleotide sequence was treated with Siil, and the anti-AR1 chain clone was subcloned into pCAGG-IL3ss_g4CHPa, and the anti-AR2 chain clone was subcloned into pCAGG-IL3ss-g4CHPb.
- Expression vectors were transfected into HEK293 cells using Ribofectamine 2000 for a total of 2025 kinds of anti-AR1 chain and anti-AR2 chain clones 45 ⁇ 45, and the culture supernatant after 3 days was collected.
- BaF3-MG was established by introducing an expression vector for a chimeric molecule of the extracellular regions of the AR1 and AR2 chains and the intracellular region of the G-CSF receptor into Ba / F3, a mouse IL-3-dependent proliferating cell.
- B aF3- ARG grew depending on IFN a.
- a 96-well plate was seeded with 0.1 ml of a medium containing 3 cells / sample and 1 lxlO per well washed three times. After culturing for 4 days, 10 L of viable cell counting reagent SF (nacalai tesQue) was added, and the mixture was incubated at 37 ° C for 2 hours, and A450 was measured.
- Daudi cells are a human B cell line that is highly sensitive to IFN. 6.25xl0 3 cells / well were seeded in a 96-well plate in 0.1 mL medium containing the sample. After culturing for 4 days, add 10 L of viable cell counting reagent SF (nacalai tesQue) and keep at 37 ° C for 2 hours. After warming, A450 was measured.
- viable cell counting reagent SF nacalai tesQue
- amino acid sequences of the variable regions of the antibodies selected in the above screening are shown in SEQ ID NOs: 1 to 26.
- the relationship between the name of each antibody and the sequence number is shown in Table 1 above.
- the concentration of bispeciiic scFv_CH in the culture supernatant of HEK293 was adjusted to 12.5 ng / mL in terms of IgG, and a 5-fold dilution series was prepared.
- the C0S7 culture supernatant expressing Bispeciiic IgG was diluted 2-fold, and a 5-fold dilution series was prepared. This was added at 30 / L / well to cells into which the repo overnight plasmid had been introduced. To the well of the positive control, a 5-fold dilution of IFN-hi 2a was dispensed at 30 L / wdl.
- Factor IXaj3 emulsified with FIA Incomplete Freund's Adjuvant (Diico laboratories) was subcutaneously administered at 40 g / head. Thereafter, booster immunizations were performed 3 to 7 times at weekly intervals. After confirming the increase in serum antibody titer against Factor IXaj3 by EUSA (Enzyme linked immunosorbent assay) shown in 5-2, it was diluted with PBS (-) (phosphate buffered saline without calcium ion and magnesium ion) as final immunity. Factor IXaj8 was administered intravenously at 40 ⁇ g / liead.
- mouse spleen cells were fused with mouse myeloma cells P3X63Ag8U.1 (ATCC CRL-1597, called P3U1) according to a conventional method using PEG1500 (Roche's Diagnostics).
- the fused cells suspended in RPMI1640 medium (Invitrogen) containing 10% FBS (Invitrogen) (hereinafter referred to as 10 FBS / RPMI1640) were seeded on a 96-well culture plate, and MT was selected 1, 2, 3, and 5 days after fusion.
- Hybridomas were selectively cultured by substituting a medium (10 FBS / RPMI1640 I2 50x concentrate (Dainippon Pharmaceutical) I53 ⁇ 4 BM-Condimed HI (Roche Diagnostics)) .
- a medium 10 FBS / RPMI1640 I2 50x concentrate (Dainippon Pharmaceutical) I53 ⁇ 4 BM-Condimed HI (Roche Diagnostics)
- the binding activity to Factor IXa was measured by EUSA shown in 5-2 to select a hybridoma having Factor IXa binding activity.
- the neutralizing activity for the enzyme activity of Factor IXa was measured by the method shown in 5-3, and a hybridoma having no neutralizing activity for Factor IXa was selected.
- Hybrids were cloned by limiting dilution twice by seeding one cell per well in a 96-well culture plate. Cells confirmed to be a single colony by microscopic observation were subjected to ELISA and neutralization activity measurement shown in 5-2 and 5-3, and clones were selected. Ascites of the cloned antibody was prepared by the method shown in 5-4, and the antibody was purified from the ascites. It was confirmed by the method shown in 5-5 that the purified antibody did not prolong APTT (activated partial thromboplastin time). 5-2. Factor IXa EL ISA
- diluent buffer 50 ⁇ Tris-HCl, ⁇ 8, 1% bovine serum albumin, lni MgCl 2 , 0.15M NaCl, 0.05% Tween (R) 20, 0.02 % sodium azide
- 100 xL / weIl of mouse antiserum or hybridoma culture supernatant diluted with the diluent buffer was added to the plate, and the plate was incubated at room temperature for 1 hour.
- Phospholipid (Sigma-Aldrich) was dissolved in distilled water for injection and sonicated to prepare a phospholipid solution of 400 g / fflL.
- the ascites of the established hybridoma was prepared according to a conventional method.
- BALB / c mice male, 5-7 weeks old at the start of the experiment, Nippon Chillers' Liver
- BALB / c nude mice female, 5-6 weeks old at the start of the experiment, Nippon Challus, Riva and Clea Japan
- ascites was collected from mice whose abdomen was enlarged.
- Antibody purification from ascites is performed using Protein G Sepharose TM 4 Fast Flow (Amersham
- Binding Buffer 20 mM sodium acetate, pH 5.0
- the antibody was eluted with 5 column volumes of Elution Buffer (0.1 M glycine-HC1, pH 2.5) and neutralized with Neutralizing Buffer (1 M Tris-HCl, pH 9.0). This was concentrated with Centriprep TM 10 (Millipore), and the solvent was replaced with TBS (50 mM Tris-buffered Saline).
- APTT was measured by KC10A (Amelung) connected to CR-A (Amelung).
- TBSB 50 L of diluted antibody solution, 50 / i L of standard human plasma (Dade Behring) and APTT reagent
- Factor X diluted to 1 g / mL with Coating buffer was dispensed into a Nunc-Immuno plate at 100 iL / well, and then incubated at 4 ° C for one hour. After washing three times with PBS (-) containing Tween w 20, the plate was blocked with a diluent buffer at room temperature for 2 hours.
- antiserum of mouse diluted with diluent buffer or culture supernatant of hybridoma was added to the plate, and the plate was incubated at room temperature for 1 hour.
- alkaline phosphatase-labeled goat anti-mouse IgG (H + L) diluted 1/2000 with a diluent buffer was added, and incubated at room temperature for 1 hour.
- 100 L / well of a chromogenic substrate 100 L / well of a chromogenic substrate, Blue-Phos TM Phosphate Substrate (Kirkegaad & Perry Laboratories) was added, and the plate was incubated at room temperature for 20 minutes.
- Single-stranded cDNA was synthesized by RT-PCR using Superscript cDNA synthesis system (Invitrogen) according to the method described in the instruction manual.
- PCR was performed using a thermal cycler, GeneAmp PCR system 9700 (Parkin Elmer), depending on the efficiency of amplification of the cDNA fragment.
- Condition A After heating at 98 ° C for 3 minutes, 98 ° C for 20 seconds, 58 ° C 32 cycles of one cycle consisting of 20 seconds and 72 ° C for 30 seconds
- Condition B After heating at 94 ° C for 3 minutes, then from 94 ° C for 20 seconds, 46 ° C for 20 seconds, and 68 ° C for 30 seconds
- the reaction was performed under any of the following conditions: 5 cycles for one cycle, and 30 cycles for one cycle consisting of 94 ° C for 20 seconds, 58 ° C for 20 seconds, and 72 ° C for 30 seconds.
- the reaction solution was subjected to 1% agarose gel electrophoresis. Amplified fragment of desired size (about 400 bp)
- the following operation was performed to add a restriction site for cloning Sfi I to both ends of the amplified fragment of the antibody variable region.
- PCR was performed under the condition A (heating at 98 ° C for 3 minutes, then at 98 ° C for 20 seconds, and at 58 ° C for 20 seconds) using the Thermocycler GeneAmp PCR system 9700 (Parkin Elmer) according to the efficiency of fragment amplification.
- the amplified fragment of the desired size (about 400 bp) was purified using the QIAtiuick Gel Extraction Kit (QIAGEN) according to the method described in the attached instruction manual, and eluted with 30 ⁇ L of sterile water.
- VL mouse antibody L chain variable region
- PCR was performed at 94 ° C for 3 minutes, then at 94 ° C for 20 seconds, at 46 ° C for 20 seconds, and at 68 ° C, according to the efficiency of fragment amplification using the ThermoCycler GeneAmp PCR system 9700 (Parkin Elmer).
- the reaction was performed under the conditions of 5 cycles of a reaction composed of 30 seconds of C as one cycle, and 30 cycles of a reaction composed of 30 seconds of 94 ° C for 20 seconds, 58 ° C for 20 seconds and 72 ° C for 30 seconds.
- the reaction solution was subjected to 1 agarose gel electrophoresis.
- the amplified fragment of the target size (about 400 bp) was purified using the QIAaucick Gel Extractio Kit (QIAGEN) according to the method described in the attached instruction manual, and eluted with sterile water.
- the fragment is in a state where (Gly4Ser) 3-linker arrangement ⁇ ! Derived from primer LF has been added to its C-terminal.
- the (Gly4Ser) 3-linker sequence of primer LF was changed to a sequence (SEQ ID NO: 32) having a SiiI cleavage site (Primer-1 VL -3 'end).
- Sii I-VL Sii I cleavage site-added VL fragment
- Sii I-VL Sii I-VL
- 0.5 L of each IOM VL-3 'end primer mixture and 10 xM scback primers to a 20 L reaction solution (purified VL cDNA amplification).
- Fragment solution IL, KOD plus buffer (Toyobo), 0.2 ⁇ dNTPs, 1.5 mM MgCl 2 , 0.5 units DNA polymerase KODplus (Toyobo) were prepared.
- PCR was performed using a Thermocycler GeneAmp PCR system 9700 (Parkin Elmer) at 94 ° C for 3 minutes, followed by a reaction consisting of 94 ° C for 20 seconds, 46 ° C for 20 seconds, and 68 ° C for 30 seconds. The reaction was performed under the conditions of 5 cycles as a cycle, and 30 cycles of a reaction consisting of 94 ° C for 20 seconds, 58 DC for 20 seconds and 72 ° C for 30 seconds. After PCR, the reaction solution was subjected to 1% agarose gel electrophoresis. The amplified fragment of the target size (about 400 bp) was purified using the QIAQuick Gel Extraction Kit (QIAGEN) according to the method described in the attached instruction manual, and eluted with 30 L of sterile water.
- QIAQuick Gel Extraction Kit QIAQuick Gel Extraction Kit
- a reaction solution was prepared with Sii I (Yukara Bio) according to the method described in the attached instruction manual, and digested at 50 ° C overnight. Thereafter, the reaction solution was purified using the QIAquick PCR Purification Kit (QIAGEN) according to the method described in the attached instruction manual, and eluted with Buffer EB attached to the kit. 7-4. Plasmid for expressing human IgG4-mouse chimeric bispecific IgG antibody When producing the desired bispecific IgG antibody, the knobs of IgGl are used to form each H chain heteromolecule. -Amino acid substitution to the CH3 part of IgG4 was prepared with reference to holes technology (Ridgway et al., Protein Eng. 1996; 9: 617-621). 'Type a
- IgG4 r a is a substitution of Y349 T366W
- type b is a substitution of E356C, T366S-, L368A, Y407V.
- a substitution (-ppcpScp--> -ppcpPcp-) was introduced into the hinge region of both substitutions.
- This technology can be almost heterologous, but not limited to the L chain, and the generation of unnecessary antibody molecules may affect subsequent activity measurements. Therefore, in this strategy, one arm of each specific antibody molecule (referred to as HL molecule) is separately expressed, and corresponding to each HL molecule in order to efficiently produce the target bispecific IgG antibody in cells.
- the expression vectors used were those induced by different drugs.
- the corresponding region of each of the H chain or L chain (Fig. 1 or Fig. 2) to tetracycline-inducible vector pcDNA4 (Invitrogen), ie, animal cell Signal sequence for IL3ss (Pro Nat l.
- pcDNA4-g4H was digested with restriction sites Eco RV and Not I (Yukara Bio) at the multiple cloning site. After digesting the right arm H-chain or L-chain expression unit (approximately 1.6 kb to approximately 1.
- the other arm (referred to as the left arm HL molecule for convenience) is linked to an ecdysone analog-inducible vector, pIND (Invitrogen), for each of the H and L chains ( Figures 2 and 3), ie, the signal sequence for animal cells ( An appropriate mouse antibody variable region (VH or VL) and a human IgG4rb constant region (SEQ ID NO: 35) or a ⁇ constant region (SEQ ID NO: 34) are incorporated downstream of IL3ss) (EMBO. J. 1987; 6: 2939). (PIND-g4H to pIND-g4L) were prepared according to the method described above, and each plasmid DNA was isolated.
- the tetracycline-inducible expression plasmid (PCDNA4-g4H or PCDNA4-g4L) prepared in 7-4 was digested with SiiI, and the reaction solution was subjected to 1% agarose gel electrophoresis. Purify the fragment (about 5 kb) from which the original antibody variable region (VH or VL (see Figures 1 and 2)) has been removed using the QIAduick Gel Extraction Kit (QIAGEN) as described in the attached manual And eluted with 30 L of sterile water.
- the Sfi I-VH or Sii I-VL fragment derived from the Sfi I digested anti-F.IXa antibody prepared in 7-3 corresponding to each fragment was attached using the Quick Ligation Kit (New England Biolabs). The ligation reaction was performed according to the method described in the manual. Escherichia coli DH5 strain (Competent high DH5a (Toyobo)) was transformed with the reaction solution. From the Sii I digested ecdysone analog-inducible expression plasmid (pIND-g4H or pIND-g4L) prepared in 7-4, the antibody variable region (VH to VL (Fig. (See Fig. 3) The fragments excluding) and the corresponding Sfi I-derived Sii I-digested anti-FX antibody prepared in 7-3 VH or Sii I-VL fragments were incorporated in a similar manner.
- insertion of the target fragment was confirmed by colony PCR using a primer that sandwiched the insert fragment.
- a two-mer primer CMVF SEQ ID NO: 36
- BGHR SEQ ID NO: 37
- the hair upstream of the insertion site is lost 24-111 ⁇ 2]: the primer ( ⁇ (SEQ ID NO: 38)) and the BGH existing downstream of the insertion site Synthesized 18-mer primer BGHR (SEQ ID NO: 37) that anneals to the reverse priming site (Sigma Genosys)
- ⁇ SEQ ID NO: 38
- BGHR SEQ ID NO: 37
- PCR was performed PCR was performed using Thermal Cycler GeneAmp PCR system 9700 After heating at 96 ° C for 1 minute using (Parkin Elmer), the reaction was performed under the conditions of 30 cycles of 96 ° C for 10 seconds, 55 ° C for 10 seconds, and 72
- the reaction solution is subjected to 1% agarose gel electrophoresis, and the amplified fragment of the desired size is The resulting clones were selected, and the PCR product was inactivated with excess primer and dNTPs using ExoSAP-IT (Amersham Biosciences) according to the attached instructions.
- ExoSAP-IT Amersham Biosciences
- the DNA sequencer was determined using the ABI PRISM 3100 Genetic Analyzer (Applied Biosystems) according to the method described in the attached manual. Analyze with RC Version 6.1 (Genetyx) and find the target clones that do not contain the insertion / deletion mutation etc. for VH, and the insertion / deletion mutation etc.
- the target clone which did not enter was selected. Plasmid DNA was isolated from the target clone using QIAprep Spin Miniprep Kit (QIAGEN) and dissolved in 100 / xL sterile water.
- PCDNA4-g4IXa3 ⁇ 4i, pcDNA4-g4IXaLn, pIND-g4XHn and pIND-g4XLn were used at 218.8 ng each, and pcDNA6 / TR and pVgRXR at 1312.5 ng each.
- Goat affinity purified antibody to human IgG Fc was prepared at lg / mL using a coating buffer and immobilized on a Nunc-Immuno plate. After blocking treatment with Diluent buffer (DB), a culture supernatant sample appropriately diluted using DB was added.
- human IgG4 humanized anti-TF antibody, see TO 99/51743
- DB Diluent buffer
- Goat anti-human IgG and alkaline phosphatase Biosource International
- Sigma 104 (R) phosphatase substrate (Sigma-Aldrich) was used as a substrate.
- the sample was colored, and the absorbance at 405 nm was measured using an absorbance reader Model 3550 (Bio-Rad Laboratories) with a reference wavelength of 655 nm.
- the concentration of human IgG in the culture supernatant was calculated from the standard calibration curve.
- TBSB-S TBSB containing 5 xL, 5 mM CaCl 2 and 1 MgCl 2
- F. Villa-like activity was expressed as a value obtained by subtracting the change in absorbance for 30 minutes without addition of the antibody from the change in absorbance for 30 minutes after addition of the antibody (see FIGS. 4 and 5).
- TBSB was used as the Phospholipid solvent
- TBSB-S was used as the Factor XIa Factor IX and Factor X solvents.
- the chromogenic substrate solution is a 1: 1 mixture of test team chromogenic substrate S-2222 (Chromogenix) and polybrene solution (0.6 mg / L hexadimethrine 'bromide (Sigma)) dissolved according to the attached instructions.
- a bispecific antibody having a function of substituting a ligand function for a receptor containing a heteromolecule is provided.
- the present invention provides a bispecific antibody that recognizes both an enzyme and a substrate of the enzyme, and that substitutes for a function of a cofactor that enhances enzyme activity.
- the bispecific antibody of the present invention has high stability in blood and is considered to be low in origin, and is therefore expected to be a pharmaceutical.
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Priority Applications (34)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2003271186A AU2003271186A1 (en) | 2003-10-14 | 2003-10-14 | Double specific antibodies substituting for functional protein |
JP2005509476A JPWO2005035754A1 (ja) | 2003-10-14 | 2003-10-14 | 機能蛋白質を代替する二種特異性抗体 |
PCT/JP2003/013123 WO2005035754A1 (ja) | 2003-10-14 | 2003-10-14 | 機能蛋白質を代替する二重特異性抗体 |
US10/575,905 US20080075712A1 (en) | 2003-10-14 | 2003-10-14 | Double Specific Antibodies Substituting For Functional Proteins |
EP03751478A EP1693448A4 (en) | 2003-10-14 | 2003-10-14 | DOUBLE SPECIFICITY ANTIBODY FOR FUNCTIONAL PROTEIN SUBSTITUTION |
EP10179092A EP2311945A1 (en) | 2003-10-14 | 2003-10-14 | Bispecific antibodies substituting for functional proteins |
TW093130368A TW200514790A (en) | 2003-10-10 | 2004-10-07 | Bispecific antibody substituting for functional protein |
NO20160762A NO345624B1 (no) | 2003-10-10 | 2004-10-08 | Fremgangsmåte for å oppnå bispesifikke antistoffer av IgG-type som funksjonelt erstatter faktor VIII/VIIIa. |
PT161623533T PT3085783T (pt) | 2003-10-10 | 2004-10-08 | Anticorpo biespecífico substituinte de proteínas funcionais |
EP16162353.3A EP3085783B1 (en) | 2003-10-10 | 2004-10-08 | Bispecific antibody substituting for functional proteins |
HUE16162353A HUE053833T2 (hu) | 2003-10-10 | 2004-10-08 | Bispecifikus ellenanyag funkcionális proteinek helyettesítésére |
KR1020127033128A KR101361437B1 (ko) | 2003-10-10 | 2004-10-08 | 기능 단백질을 대체하는 이종특이성 항체 |
CA2541671A CA2541671C (en) | 2003-10-10 | 2004-10-08 | Bispecific antibody substituting for functional proteins |
JP2005514610A JP5438880B2 (ja) | 2003-10-10 | 2004-10-08 | 機能蛋白質を代替する二種特異性抗体 |
PCT/JP2004/014911 WO2005035756A1 (ja) | 2003-10-10 | 2004-10-08 | 機能蛋白質を代替する二種特異性抗体 |
BRPI0415230-1A BRPI0415230B1 (pt) | 2003-10-10 | 2004-10-08 | Anticorpo biespecífico de substituição de proteínas funcionais, composição e seu uso |
ES16162353T ES2865152T3 (es) | 2003-10-10 | 2004-10-08 | Anticuerpo biespecífico que sustituye a proteínas funcionales |
RU2006115614/13A RU2339696C2 (ru) | 2003-10-10 | 2004-10-08 | Биспецифическое антитело, заменяющее функциональные белки |
MXPA06003831A MXPA06003831A (es) | 2003-10-10 | 2004-10-08 | Anticuerpo bi-especifico que substituye las proteinas funcionales. |
DK16162353.3T DK3085783T3 (da) | 2003-10-10 | 2004-10-08 | Bispecifikt antistof som substitution for funktionelle proteiner |
US10/575,193 US8062635B2 (en) | 2003-10-10 | 2004-10-08 | Bispecific antibody substituting for functional proteins |
CN200480036248.8A CN1890369B (zh) | 2003-10-10 | 2004-10-08 | 替代功能蛋白质的双特异性抗体 |
EP04792180A EP1688488B9 (en) | 2003-10-10 | 2004-10-08 | Bispecific antibody substituting for factor viii |
PL16162353T PL3085783T3 (pl) | 2003-10-10 | 2004-10-08 | Przeciwciało biswoiste zastępujące białka funkcjonalne |
DK04792180.4T DK1688488T3 (da) | 2003-10-10 | 2004-10-08 | Bispecifikt antistof som erstatning for faktor III |
AT04792180T ATE518952T1 (de) | 2003-10-10 | 2004-10-08 | Bispezifischer antikörper als ersatz für factor viii |
AU2004280421A AU2004280421B2 (en) | 2003-10-10 | 2004-10-08 | Bispecific antibody substituting for functional proteins |
EP10180356A EP2289944A3 (en) | 2003-10-10 | 2004-10-08 | Bispecific antibody substituting for functional proteins |
SI200432510T SI3085783T1 (sl) | 2003-10-10 | 2004-10-08 | Bispecifično protitelo, ki nadomesti funkcionalne proteine |
NZ546509A NZ546509A (en) | 2003-10-10 | 2004-10-08 | Bispecific antibody substituting for functional proteins wherein the antibody can recognize both a proteolytic enzyme and a substrate thereof such as blood coagulation/fibrinolysis associated factors |
IL174794A IL174794A (en) | 2003-10-10 | 2006-04-05 | A specific antibody substitute for functional proteins |
KR1020067008860A KR101471194B1 (ko) | 2003-10-10 | 2006-05-08 | 기능 단백질을 대체하는 이종특이성 항체 |
NO20062087A NO338686B1 (no) | 2003-10-10 | 2006-05-09 | Bispesifikt antistoff som gjenkjenner både et proteolytisk enzym og et substrat derav, hvor det er i stand til å fungere som en kofaktor som forsterker den enzymatiske reaksjonen, og hvor enzymet, substratet og kofaktoren er spesifikke blodkoagulasjonsfaktorer. |
JP2011001733A JP5490734B2 (ja) | 2003-10-10 | 2011-01-07 | 機能蛋白質を代替する二種特異性抗体 |
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EP (2) | EP1693448A4 (ja) |
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WO (1) | WO2005035754A1 (ja) |
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EP2311945A1 (en) | 2011-04-20 |
AU2003271186A1 (en) | 2005-04-27 |
EP1693448A4 (en) | 2008-03-05 |
EP1693448A1 (en) | 2006-08-23 |
US20080075712A1 (en) | 2008-03-27 |
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