WO2003000883A1 - Cell proliferation inhibitors containing anti-glypican 3 antibody - Google Patents
Cell proliferation inhibitors containing anti-glypican 3 antibody Download PDFInfo
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- WO2003000883A1 WO2003000883A1 PCT/JP2002/006237 JP0206237W WO03000883A1 WO 2003000883 A1 WO2003000883 A1 WO 2003000883A1 JP 0206237 W JP0206237 W JP 0206237W WO 03000883 A1 WO03000883 A1 WO 03000883A1
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K39/00—Medicinal preparations containing antigens or antibodies
- A61K39/395—Antibodies; Immunoglobulins; Immune serum, e.g. antilymphocytic serum
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- 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
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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
- A61P35/00—Antineoplastic agents
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P35/00—Antineoplastic agents
- A61P35/02—Antineoplastic agents specific for leukemia
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P43/00—Drugs for specific purposes, not provided for in groups A61P1/00-A61P41/00
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- 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
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- 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
- C07K16/30—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies against material from animals or humans against receptors, cell surface antigens or cell surface determinants from tumour cells
- C07K16/3076—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies against material from animals or humans against receptors, cell surface antigens or cell surface determinants from tumour cells against structure-related tumour-associated moieties
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K39/00—Medicinal preparations containing antigens or antibodies
- A61K2039/505—Medicinal preparations containing antigens or antibodies comprising antibodies
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- 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
- C07K2317/34—Identification of a linear epitope shorter than 20 amino acid residues or of a conformational epitope defined by amino acid residues
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K2317/00—Immunoglobulins specific features
- C07K2317/70—Immunoglobulins specific features characterized by effect upon binding to a cell or to an antigen
- C07K2317/73—Inducing cell death, e.g. apoptosis, necrosis or inhibition of cell proliferation
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K2317/00—Immunoglobulins specific features
- C07K2317/70—Immunoglobulins specific features characterized by effect upon binding to a cell or to an antigen
- C07K2317/73—Inducing cell death, e.g. apoptosis, necrosis or inhibition of cell proliferation
- C07K2317/732—Antibody-dependent cellular cytotoxicity [ADCC]
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K2317/00—Immunoglobulins specific features
- C07K2317/70—Immunoglobulins specific features characterized by effect upon binding to a cell or to an antigen
- C07K2317/73—Inducing cell death, e.g. apoptosis, necrosis or inhibition of cell proliferation
- C07K2317/734—Complement-dependent cytotoxicity [CDC]
Definitions
- the present invention relates to a cell growth inhibitor containing an anti-glypican 3 antibody as an active ingredient.
- the glypican family has been reported as a new family of heparan sulfate proteoglycans present on the cell surface. To date, five glypicans have been reported to be members of the glypican family (glypican 1, glypican 2, glypican 3, glypican 4 and glypican 5). Members of this family have a uniform size (approximately 60 kDa) of core protein, share a specific, well-retained sequence of cysteines, and are anchored by glycosylphosphatidylinositol (GPI) anchors. It is bound to the cell membrane.
- GPI glycosylphosphatidylinositol
- Daripican 3 was isolated as a developmentally regulated transcript from rat small intestine (Filmus, J., Church, JG, and Buick, .n. (1988) Mol. Cell Biol. 8, 4243 -4249), later possessing a core protein of the glypican family with a molecular weight of 69 kDa.
- GPI-linked heparan sulfate proteoglycan was identified as OCT-5 (Filmus, J., Shi, I, Wong, Z.- ⁇ ⁇ , and Wong, MJ (1995) Biochei. J. 311, 56 1-565).
- glypican 3 In humans, a gene encoding glypican 3 has been isolated as MXR-7 from a human gastric cancer cell line (Hermaim Lü et al., Gene 188 (1997) 151-156). It has been reported that glypican 3 forms a protein-protein complex with insulin-like growth factor_2 and regulates the activity of this growth factor (Pilia, G. eta 1, (1996) Nat. Genet. 12, 241-247). This report suggests that glypican 3 is not necessarily interacting with growth factors through heparan sulfate chains.
- dalipican 3 can be used as a hepatocellular carcinoma marker (Hey-Chi Hsu et al., CANCER RESEARCH 57, 5179-5184 (1997)), glypican 3 and cancer cells There is no knowledge of the clear relationship of proliferation. Furthermore, it has been suggested that Daribican may function as a receptor for endostin, which may act as an angiogenesis inhibitor (Molecul ar Cell (2001), 7, 811-822). However, the relationship between this function and cell proliferation has not been clarified. As mentioned above, although there was a suggestion that glypican 3 is involved in cell growth, the mechanism of cell growth was unknown, and no attempt was made to use dalipican 3 for regulating cell growth. Disclosure of the invention
- An object of the present invention is to provide a cell growth inhibitor containing an anti-glypican 3 antibody as an active ingredient.
- anti-glypican 3 antibody has ADCC (antibody-dependent cell-mediated cytotoxicity) activity, CDC (complement-dependent cytotoxicity
- the present invention exerts a cell growth inhibitory activity by a component-dependent cytotoxicity (activity) activity, thereby completing the present invention.
- the anti-glypican 3 antibody will exert its cell growth inhibitory activity by inhibiting the action of growth factors.
- the cell growth inhibitory activity can also be exerted by binding a cytotoxic substance such as a radioisotope, a chemotherapy agent, or a bacterial toxin to the anti-glybican 3 antibody. That is, the present invention
- a cell growth inhibitor comprising an anti-glypican 3 antibody as an active ingredient
- cytostatic activity of (2) wherein the cytotoxic activity is antibody-dependent cytotoxicity (ADCC) activity or complement-dependent cytotoxicity (CDC) activity;
- the cell growth inhibitor of (4) wherein the cell is selected from the group consisting of liver cancer cells, lung cancer cells, colon cancer cells, breast cancer cells, prostate cancer cells, leukemia cells, lymphoma cells, and knee cancer cells .
- the present invention is a cell growth inhibitor containing an anti-glybican antibody as an active ingredient. Further, the present invention is a cell growth inhibitor which contains an anti-glypican antibody as an active ingredient, and which can be used for treating diseases based on abnormal growth of cells, particularly cancer.
- Examples of the anti-glypican 3 antibody of the present invention include known antibodies such as a humanized antibody, a human antibody (W096 / 33735), a chimeric antibody (JP-A-4-228089), and a mouse antibody. Examples include the antibodies in the invention.
- the antibody may be a polyclonal antibody, but is preferably a monoclonal antibody.
- the anti-glypican 3 antibody used in the present invention is not limited in its origin, type (monoclonal or polyclonal) and shape, as long as it has a cell growth inhibitory ability.
- Anti-glypican 3 antibody The anti-glybican 3 antibody used in the present invention can be obtained as a polyclonal or monoclonal antibody using known means. As the anti-Glypican 3 antibody used in the present invention, a mammal-derived monoclonal antibody is particularly preferable. Monoclonal antibodies derived from mammals include those produced in hybridomas and those produced in hosts transformed with expression vectors containing the antibody gene by genetic engineering techniques. This antibody binds to glypican 3 and suppresses cell proliferation.
- Such antibodies include the monoclonal antibodies produced by the hybridoma clones of the present invention.
- a monoclonal antibody-producing hybridoma can be basically produced using a known technique as follows. That is, glypican 3 is used as a sensitizing antigen, and is immunized according to a usual immunization method, and the obtained immune cells are fused with a known parent cell by a usual cell fusion method. It can be prepared by screening a single antibody-producing cell.
- a monoclonal antibody may be prepared as follows.
- human glypican 3 used as a sensitizing antigen for obtaining an antibody was expressed with the glypican 3 (MX7) gene Z amino acid sequence disclosed in Lü, H. et al., Gene 188 (1997), 151-156. Get by doing. That is, a gene sequence encoding glypican 3 is inserted into a known expression vector system to transform an appropriate host cell, and then the target human glypican 3 protein is extracted from the host cell or culture supernatant. Purify by a known method.
- this purified glypican 3 protein is used as a sensitizing antigen.
- a partial peptide of Daribican 3 can be used as a sensitizing antigen.
- the partial peptide can be obtained by chemical synthesis from the amino acid sequence of human glybican 3.
- anti-glypican 3 antibody inhibits the activity of ADCC, the action of CDC, and the cell growth inhibitory activity by inhibiting the growth factor activity
- the anti-glypican 3 antibody may be used in combination with radioisotopes, chemotherapeutics, bacterial toxins, Since the cell proliferation can be suppressed by binding a cytotoxic substance, a group that is recognized by the anti-glypican 3 antibody of the present invention.
- the epitope on the three molecules of Lipican is not limited to a particular one, and any epitope existing on the three molecules of glypican may be recognized. Therefore, any antigen can be used as an antigen for preparing the anti-glypican 3 antibody of the present invention, as long as it is a fragment containing an epitope present on 3 molecules of dalibican.
- the mammal to be immunized with the sensitizing antigen is not particularly limited, but is preferably selected in consideration of compatibility with the parent cell used for cell fusion.
- rodents For example, animals such as mice, rats, hamsters, egrets, and salves are used.
- Immunization of an animal with a sensitizing antigen is performed according to a known method.
- the sensitizing antigen is injected intraperitoneally or subcutaneously into a mammal.
- the sensitizing antigen is diluted and suspended in a suitable amount with PBS (Phosphate-Buf ferred Saline) or physiological saline, and then mixed with an appropriate amount of a normal adjuvant, for example, Freund's complete adjuvant, if desired. After emulsification, administer to mammals several times every 4 to 21 days.
- an appropriate carrier can be used during immunization of the sensitizing antigen.
- immunocytes are collected from the mammal and subjected to cell fusion. Splenocytes.
- Mammalian myeloma cells are used as the other parent cells to be fused with the immune cells.
- This myeloma cell can be selected from various known cell lines, for example, P3 (P3x63Ag8.653) (J. Immnol. (1979) 123, 1548-1550), P3x63Ag8U.1 (Current Topics in Microbiology and I 1978) 81, 1-7), NS-1 (Koler.G. And Milste in, C. Eur. J. I. 1. (1976) 6, 511-519), MPC-11 (Margul ies. DH et al., Cell (1976) 8, 405-415), SP2 / 0 (Shulman, M.
- the cell fusion between the immune cells and myeoma cells is basically performed by a known method, for example, the method of Kohler and Milstein et al. (Kohler. G. and Milstein, C., Met hods Enzymol. (1981) 73, 3-46). More specifically, the cell fusion is carried out in a normal nutrient medium, for example, in the presence of a cell fusion promoter.
- a fusion promoter for example, polyethylene glycol
- PEG PEG
- Sendai virus HVJ
- an auxiliary agent such as dimethyl sulfoxide can be added to enhance the fusion efficiency.
- the ratio of the immune cells to the myeloma cells can be arbitrarily set. For example, it is preferable that the number of immune cells is 1 to 10 times that of myeloma cells.
- the culture solution used for the cell fusion for example, RPMI 1640 culture solution, MEM culture solution, and other ordinary culture solutions used for this type of cell culture suitable for the growth of the myeloma cell line can be used.
- a serum replacement solution such as fetal calf serum (FCS) can be used in combination.
- a predetermined amount of the immune cells and myeloma cells are mixed well in the culture solution, and a PEG solution (for example, an average molecular weight of about 1000 to 6000), which has been heated to about 37 ° C in advance, is usually 30 to 60%. (w / v) is added and mixed to form the desired fused cells (eight hybridomas). Subsequently, an appropriate culture solution is sequentially added, and the operation of removing the supernatant by centrifugation is repeated to remove cell fusion agents and the like that are unfavorable for the growth of the hybridoma.
- a PEG solution for example, an average molecular weight of about 1000 to 6000
- the hybridoma thus obtained is selected by culturing it in a normal selective culture medium, for example, a HAT culture medium (a culture medium containing hypoxanthine, aminopterin and thymidine).
- a HAT culture medium a culture medium containing hypoxanthine, aminopterin and thymidine.
- the culturing in the HAT culture solution is continued for a time (usually several days to several weeks) sufficient for cells other than the target hybridoma (non-fused cells) to die.
- a conventional limiting dilution method is performed, and screening and single cloning of hybridomas producing the desired antibody are performed.
- human lymphocytes are sensitized in vitro to daripican 3 to sensitize the sensitized lymphocytes to human-derived permanent cleavage ability.
- a desired human antibody having a binding activity to dalibican 3 can be obtained (see Japanese Patent Publication No. 1-59878).
- a transgenic animal having the entire repertoire of human antibody genes is administered with dalibican 3 as an antigen to obtain anti-glypican 3 antibody-producing cells.
- the immortalized cells are used to obtain human antibodies against dalipican 3 from the immortalized cells. May be obtained (International Patent Application Publication Nos.TO94 / 25585, W093 / 12227, W092 / 03918, W094 / 0 No. 2602).
- the hybridoma producing the mosoclonal antibody thus produced can be subcultured in a normal culture solution, and can be stored for a long time in liquid nitrogen.
- the monoclonal antibody can be obtained from the hybridoma by culturing the hybridoma according to a conventional method and obtaining the culture supernatant, or by administering the hybridoma to a mammal compatible with the hybridoma. Then, a method of obtaining ascites is used.
- the former method is suitable for obtaining high-purity antibodies, while the latter method is suitable for mass production of antibodies.
- a recombinant antibody produced by cloning an antibody gene from a hybridoma, inserting the antibody gene into an appropriate vector, introducing this into a host, and using a gene recombination technique is used. It can be used (for example, see Vand amine, AM et al., Eur. J. Biochem. (1990) 192, 767-775, 1990). Specifically, mRNA encoding the variable (V) region of the anti-glypican 3 antibody is isolated from the hybridoma producing the anti-glypican 3 antibody.
- the mRNA can be isolated by known methods, for example, guanidine ultracentrifugation (Chirgwin, JM et al., Biodiemistry (1979) 18, 5294-5299), AGPC method (Comczynski, P. et al., Anal. Biochem. (1987) 162, 156-159) to prepare the whole MA, and use mRNA Purification Kit
- mRNA can be directly prepared by using QuickPrep mRNA Purification Kit (Pharmacia).
- cDNA for the antibody V region is synthesized using reverse transcriptase.
- Synthesis of cDNA is performed using AMV Reverse Transcriptase First-strand cDNA Synthesis Kit (manufactured by Iidaigaku Kogyo).
- AMV Reverse Transcriptase First-strand cDNA Synthesis Kit manufactured by Iidaigaku Kogyo.
- a 5'-RACE method using 5'-Ampli FINDER RACE Kit manufactured by Clontech
- PCR Frroliman, MA et al., Pro Natl. Acad. Sci. USA ( 1988) 85, 8998-9002, Belyavsky, A. et al., Nucleic Acids Res. (1989) 17, 2919-2932) and the like.
- the target DNA fragment is purified from the obtained PCR product and ligated to vector DNA. Furthermore, a recombinant vector is prepared from this, and introduced into E. coli, etc. to select colonies To prepare the desired recombinant vector. Then, the nucleotide sequence of the target employee A is confirmed by a known method, for example, the dideoxynucleotide chain termination method.
- an antibody gene is incorporated into an expression vector so that it is expressed under the control of an expression control region, for example, an enhancer or a promoter.
- an expression control region for example, an enhancer or a promoter.
- a host cell is transformed with this expression vector to express the antibody.
- Expression of the antibody gene may be performed by separately transforming the DNA encoding the antibody heavy chain (H chain) or light chain (L chain) into an expression vector and co-transforming the host cells, or The host cell may be transformed by incorporating the DNA encoding the L chain into a single expression vector (see WO94 / 11523).
- transgenic animals For the production of recombinant antibodies, not only the above host cells but also transgenic animals can be used.
- an antibody gene is inserted into a gene encoding a protein (eg, goat casein) that is specifically produced in milk to prepare a fusion gene.
- a DNA fragment containing the fusion gene into which the antibody gene has been inserted is injected into a goat embryo, and the embryo is introduced into a female goat.
- the desired antibody is obtained from milk produced by a transgenic goat born from the goat that has received the embryo or its progeny.
- Hormones may also be used in transgeneic goats as appropriate to increase the amount of milk containing the desired antibody produced by transgeneic goats (Ebert, KM et al., Bio / Technology (1994) 12, 699-702).
- genetically modified antibodies artificially modified for the purpose of reducing heterologous antigenicity to humans and the like for example, chimeric antibodies and humanized antibodies can be used. These modified antibodies can be produced using known methods.
- the chimeric antibody is obtained by ligating the DNA encoding the antibody V region obtained as described above with A encoding the human antibody C region, inserting this into an expression vector, and introducing it into a host. It is obtained by producing. Using this known method, chimeric antibodies useful in the present invention can be obtained.
- Humanized antibodies are also referred to as reshaped human antibodies, which are used to replace the complementarity determining regions (CDRs) of non-human mammals, such as mouse antibodies, with the complementarity of human antibodies. It has been transplanted to a determinant region, and its general genetic recombination technique is also known (see European Patent Application Publication No. EP 125023, WO 96/02576).
- a DNA sequence designed to link the mouse antibody CDR with the human antibody framework region (FR) is replaced with a portion overlapping both the CDR and FR terminal regions. It is synthesized by PCR using several oligonucleotides produced as primers as primers (see the method described in W098 / 13388).
- the framework region of the human antibody to be linked via CDR is selected so that the complementarity determining region forms a favorable antigen-binding site. If necessary, amino acids in the framework region in the variable region of the antibody may be substituted so that the complementarity determining region of the reshaped human antibody forms an appropriate antigen-binding site (Sato, K. et al. , Cancer Res. (1993) 53, 851-856).
- the C region of a chimeric antibody and a humanized antibody is used as the human Bok antibody, the H chain
- C T 1, C r 2 , CT 3, the CT 4, the L chain CK, ⁇ 3 ⁇ can be used.
- the human antibody C region may be modified in order to improve the stability of the antibody or its production.
- a chimeric antibody comprises a variable region of an antibody derived from a mammal other than a human and a constant region derived from a human antibody.
- a humanized antibody is composed of a complementarity determining region of a non-human mammal-derived antibody, a human antibody-derived framework region and a C region. Since the humanized antibody has reduced antigenicity in the human body, it is useful as an active ingredient of the therapeutic agent of the present invention.
- the antibody used in the present invention is not limited to the whole antibody molecule, and may be an antibody fragment or a modified product thereof as long as it binds to dalippican 3 and suppresses cell proliferation.
- Antibodies are also included.
- antibody fragments include Fab, F (ab ') 2, Fv, Fab / c having one Fab and complete Fc, or single chain Fv (scFv) in which Fv of H chain or L chain is linked by an appropriate linker.
- the antibody is treated with an enzyme such as papain or pepsin to generate an antibody fragment, or a gene encoding these antibody fragment is constructed and introduced into an expression vector. Expression in cells (for example, Co, MS et al., J. Immunol.
- scFv can be obtained by linking the H chain V region and L chain V region of the antibody.
- the H chain V region and L chain V region are linked via a linker, preferably a peptide linker (Huston, JS et al., Proc. Natl. Acad. Sci. USA (1 988) 85, 5879-5883).
- the H chain V region and L chain V region in the scFv may be from any of those described herein as antibodies.
- the peptide linker that connects the V regions for example, any single-chain peptide consisting of 12 to 19 amino acid residues is used.
- the scFv-encoding DNA is a DNA encoding the H chain or the H chain V region of the antibody, and the DNA encoding the L chain or the L chain V region is all or a desired amino acid sequence thereof.
- an expression vector containing them and a host transformed with the expression vector can be obtained according to a conventional method.
- a host By using a host, scFv can be obtained according to a conventional method.
- antibody fragments can be obtained and expressed in the same manner as described above, and produced by a host.
- antibody refers to fragments of these antibodies. Are also included.
- Anti-glypican antibodies conjugated with various molecules such as polyethylene glycol (PEG) and cytotoxic substances can also be used as modified antibodies.
- the “antibody” in the present invention also includes these modified antibodies.
- Such a modified antibody can be obtained by subjecting the obtained antibody to chemical modification. The method of antibody modification has already been established in this field. '
- the antibody used in the present invention may be a bispecific antibody (bispecific antibody).
- the bispecific antibody may be a bispecific antibody having an antigen-binding site that recognizes different epitopes on the glypican 3 molecule, or one antigen-binding site may recognize glypican 3 and the other antigen-binding site. May recognize cytotoxic substances such as chemotherapeutic agents, cell-derived toxins and radioactive substances. In this case, it is possible to apply a cytotoxic substance directly to the cells expressing glypican 3 to specifically damage the tumor cells, thereby suppressing the growth of the tumor cells.
- Bispecific antibodies can be produced by combining HL pairs of two types of antibodies, or by fusion of eight hybridomas producing different monoclonal antibodies to produce bispecific antibody-producing fusion cells. , You can also get. Further, bispecific antibodies can be produced by genetic engineering techniques.
- the antibody gene constructed as described above can be expressed and obtained by a known method.
- a useful promoter commonly used, an antibody gene to be expressed, and a polyA signal operably linked to the 3 ′ downstream thereof can be expressed.
- examples of the promoter Z enhancer include human cytomegalovirus immediate early promoter / enhancer.
- a useful promoter commonly used, a signal sequence for antibody secretion, and an antibody gene to be expressed can be functionally linked to express the gene.
- the promoter include a lacz promoter and an araB promoter.
- the method of Ward et al. (Nature (1098) 341, 544-546; FASEB J. (1992) 6, 2422-2427) when using the lacz promoter overnight, or Bet when using the a raB promoter It can be expressed by the method of Ter et al. (Science (1988) 240, 1041-1043).
- a pelB signal sequence (Lei, SP, et al J. Bacteriol. (1987) 169, 4379) may be used for production in E. coli periplasm. Then, after separating the antibody produced in the periplasm, the antibody structure is appropriately refolded and used.
- an expression vector is selected.
- genes include aminoglycoside transferase (APH) gene, thymidine kinase (TK) gene, Escherichia coli xanthinguanine phospholiposyltransferase (Ecogpt) gene, and dihydrofolate reductase (dMr) gene.
- Eukaryotic cells include, for example, established mammalian cell lines, insect cell lines, animal cells such as eukaryotic fungal cells and yeast cells, and prokaryotic cells include, for example, bacterial cells such as Escherichia coli cells.
- Eukaryotic cells include, for example, established mammalian cell lines, insect cell lines, animal cells such as eukaryotic fungal cells and yeast cells
- prokaryotic cells include, for example, bacterial cells such as Escherichia coli cells.
- the antibodies used in the present invention are expressed in mammalian cells, such as CH0, COS, myeloma, BHK, Vero, HeLa cells.
- the transformed host cells are cultured in vitro or in vivo to produce the desired antibody.
- Culture of the host cell is performed according to a known method.
- DMEM, MEM, RPMI 1640, IMDM can be used as a culture solution, and a serum supplement such as fetal calf serum (FCS) can be used in combination.
- FCS fetal calf serum
- Antibodies expressed and produced as described above can be separated from cells and host animals and purified to homogeneity. Separation and purification of the antibody used in the present invention can be carried out using an affinity column.
- affinity column For example, columns using a protein A column include Hyper D, P0R0S, Separose F.F. (Pharmacia), and the like.
- separation and purification methods used for ordinary proteins may be used, and there is no limitation.
- antibodies can be separated and purified by appropriately selecting and combining chromatographic columns other than the above affinity columns, filters, ultrafiltration, salting out, dialysis, etc. (Antibodies A Laboratory Manual Ed Harlow, David Lane, Cold Spring Harbor Laboratory, 1988).
- the antigen-binding activity of the antibody used in the present invention (Ant Ibodies A Laboratory Manual. Ed Harlow, David Lane, Cold Spring Harbor Laboratory, 1988), the activity of inhibiting the binding of a recombinant receptor (Harada, A. et al. , International Immunology (1993) 5, 681-690) can be measured by a known method.
- ELISA enzyme-linked immunosorbent assay
- EIA enzyme-linked immunosorbent assay
- RIA radioimmunoassay
- a fluorescent antibody method can be used to measure the antigen-binding activity of the anti-glybican 3 antibody used in the present invention.
- an enzyme immunoassay a sample containing an anti-glypican 3 antibody, for example, a culture supernatant of an anti-glypican 3 antibody-producing cell or a purified antibody is added to a plate coated with glypican 3.
- a secondary antibody labeled with an enzyme such as alkaline phosphatase incubate the plate, wash the plate, add an enzyme substrate such as P-nitrophenyl phosphate, and measure the absorbance to determine the antigen binding activity. Can be evaluated.
- an enzyme such as alkaline phosphatase
- the neutralizing activity of the anti-glypican 3 antibody is measured.
- the antibody used in the present invention has ADCC activity or CDC activity as cytotoxic activity.
- ADCC activity is determined by mixing effector cells, target cells, and anti-glybican 3 antibody.
- Example as an effector cell For example, mouse spleen cells, mononuclear cells isolated from human peripheral blood or bone marrow, and the like can be used, and human cell lines such as human hepatoma cell line HuH-7 can be used as target cells.
- the target cells are labeled in advance with 51 , anti-glybican 3 antibody is added thereto, and incubation is carried out. Then, an effector cell at an appropriate ratio to the target cells is added, and incubation is carried out.
- the ADCC activity can be measured by collecting the supernatant after the incubation and counting the radioactivity in the supernatant.
- the CDC activity can be measured by mixing the above-mentioned labeled target cell and anti-glybican 3 antibody, adding complement, incubating, and counting the radioactivity in the supernatant after culturing. it can.
- the Fc portion is necessary for the antibody to exert its cytotoxic activity, when the cell growth inhibitor of the present invention utilizes the cytotoxic activity of the antibody, the antibody used in the present invention is not used.
- Glypican 3 antibodies need to include an Fc portion.
- the anti-glypican 3 antibody of the present invention can also be used for inhibiting angiogenesis.
- the cell growth inhibitor of the present invention is used for the purpose of treating or improving a disease based on abnormal proliferation of cells, particularly cancer.
- the cancer cells targeted by the cell growth inhibitor of the present invention are not particularly limited, but are preferably liver cancer, lung cancer, colon cancer, breast cancer, prostate cancer, leukemia, lymphoma, and kidney cancer, and liver cancer is particularly preferred.
- the effective dose is selected from the range of 0.001 mg / kg to 100 mg / kg body weight at a time. Alternatively, a dosage of 0.01-100000 mg / body per patient can be chosen. However, the therapeutic agent containing the anti-glypican 3 antibody of the present invention is not limited to these doses.
- the therapeutic agent of the present invention can be administered irrespective of the time before or after the clinical symptoms of the disease occur.
- the therapeutic agent containing the anti-glypican 3 antibody of the present invention as an active ingredient can be formulated according to a conventional method (Remington's Pharmaceutical Science, latest edition, Mark Publishing Company, Easton, USA), and may also contain pharmaceutically acceptable carriers and additives.
- carriers and pharmaceutical additives include water, pharmaceutically acceptable organic solvents, collagen, polyvinyl alcohol, polyvinylpyrrolidone, carboxyvinyl polymer, sodium carboxymethylcellulose, sodium polyacrylate, and alginic acid.
- the actual additive is selected from the above alone or in appropriate combination depending on the dosage form of the therapeutic agent of the present invention, but is not limited thereto.
- a purified anti-glypican 3 antibody is dissolved in a solvent, for example, physiological saline, buffer, glucose solution, etc. Those containing albumin or the like can be used.
- a solvent for example, physiological saline, buffer, glucose solution, etc.
- albumin or the like can be used.
- it may be freeze-dried to give a dosage form that is dissolved and reconstituted before use.
- sugar alcohols such as mannitol and glucose, and sugars are used. can do.
- FIG. 1 shows ADCC activity of anti-glypican 3 antibody (K6534) on HuH-7 cells.
- FIG. 2 shows the CDC activity of anti-glypican 3 antibody (K6511) on HuH-7 cells.
- FIG. 3 is a diagram showing that dalibican is expressed on HuH-7 cells.
- FIG. 4A shows the results of FACS analysis of GPC3 expression for a human lung cancer cell line. It is the result of analyzing with anti-glypican 3 antibody (K6534).
- FIG. 4B shows the results of FACS analysis of GPC3 expression for a human leukemia cell line. It is the result of analyzing with anti-glybican 3 antibody (K6534).
- FIG. 4C shows the results of FACS analysis of GPC3 expression for a human lymphoma cell line. It is the result of analyzing with anti-glybican 3 antibody (K6534).
- FIG. 4D is a diagram showing the results of FACS analysis of GPC3 expression in a human colon cancer cell line. It is the result of analyzing with anti-glypican 3 antibody (K6534).
- FIG. 4E shows the results of FACS analysis of GPC3 expression for a human breast cancer cell line. This is the result of analysis using an anti-glybican 3 antibody (1 (6534)).
- FIG. 4F shows the results of FACS analysis of GPC3 expression for a human prostate cancer cell line. It is the result of analyzing with anti-glypican 3 antibody (K6534).
- FIG. 4G is a diagram showing the results of FACS analysis of GPC3 expression for human knee cancer cell lines and human liver cancer cell lines. It is the result of analysis with anti-glybican 3 antibody (K6534).
- Amino acid sequence of human daripican 13 protein The peptide from 355th to 371st (RQYRS AYYPEDLFIDKK) was synthesized, and the synthetic peptide was combined with keyhole, lindet, and hemocyanin (KLH) to generate maleimide benzoyloxysuccinimide (MBS). ) It was bound with a type cross-linking agent to obtain an immunogen. Mice (BALB / c, female, 6 weeks old) were immunized three times at 100 / ig / animal and the antibody titer in the serum was assayed.
- the diluted serum was allowed to react with a peptide (0.5 g) -immobilized plate, and after the reaction with the HRP-labeled anti-mouse antibody, the color obtained after the addition of the substrate was measured by measuring the absorbance at 450 nm.
- the measurement method peptide solid-phase ELISA method
- spleen cells were collected, and hybridomas were isolated by cell fusion with myeloma cells (P3 / X63_Ag8) (Cola-1, G, Milstein, C: Nature, 256: 495 (1975)). Produced.
- Example 65 Inhibition of cell proliferation using anti-glybican 3 antibody ADCC (antibody-dependent cell-mediated cytotoxicity) activity and CDC (complement ent-dependent cytotoxicity) activity are measured in Current protocols in Immunodogy, Chapter 7. Immunologic studies in humans, Editor, John E, Cologan et al., Jolm Wiley & Sons , Inc., 1993.
- Spleens were excised from CBA / N mice (8-week-old, female) and splenocytes were separated in RPMI1640 medium (GIBC0). After washing with the same medium containing 10% fetal calf serum (FBS, HyClone), the cell concentration was adjusted to 5XlOVfflL to obtain effector cells.
- FBS fetal calf serum
- Baby Rabbit Complement (manufactured by CEDARLANE) was diluted 10-fold with an EM medium (manufactured by GIBCO) containing 10% FBS to obtain a complement solution.
- Human hepatoma cell line HuH-7 (JCRB No. JC B0403, Human Science Research Support Link) was added together with 0.2mCi of 5 ] Cr-sodium chromate (Amersliam Pharmacia Biotech) in DMEM medium containing 10% FBS. Radioactive labeling was performed by culturing at 37 ° C for 1 hour. After radiolabeling, the cells were washed three times with RPMI1640 medium containing 10% FBS, and the cell concentration was adjusted to 2 ⁇ / mL, and used as target cells.
- A shows the radioactivity (cpm) of each sample
- B shows the radioactivity (cpm) of the sample to which 1% NP-40 (manufactured by Hanoi) was added
- C shows the radioactivity (cpm) of the sample containing only target cells. You. The experiment was performed with duplicates, and the average value was calculated.
- a target cell and an anti-glypican 3 antibody (K6511) were added to a 96-well flat bottom plate (manufactured by Becton Dickinson) and allowed to react on ice for 15 minutes. Then, complement solution 100 L of the solution was added, and the cells were cultured for 4 hours in a carbon dioxide incubator. The final concentration of the antibody was 0 or 3 g / mL. After culturing, 100 L of the supernatant was collected, and the radioactivity was measured using a gamma counter. Cytotoxic activity was determined in the same manner as in “4. Measurement of ADCC activity.” The experiment was performed in duplicate, and the average value was calculated.
- FIG. 1 shows the ADCC activity
- Figure 2 shows the CDC activity.From these results, it can be seen that the anti-glypican 3 antibody shows ADCC activity and CDC activity against human hepatoma cell line HuH-7 and suppresses cell growth. Was revealed.
- Example 3 Measurement of Daripican Expression Level on HuH-7 Cells
- the cells were suspended in 1 mL of FACS / PBS, and the fluorescence intensity of the cells was measured with a flow cytometer (EP ICS XL, BECKMAN COULTER).
- Figure 3 shows the results of flow cytometry.
- Daripican 3 is expressed on HuH-7 cells, indicating that anti-glypican 3 antibody binds to dalibican 3 expressed on the cells and suppresses cell proliferation (Fig. 3).
- Example 4 GPC3 expression analysis in cancer cell panel using FCM
- Glypican 3 (GPC3) expression in human cell lines was analyzed using FCM.
- the cells were cultured for 2 days and then subjected to Atsushi.
- Adherent cells were collected using a 10-fold dilution of Trypsin-EDTA (Cat. No. 25300-054, Lot 14210, GIBC0) with Cell dissociation buffer (Cat. No. 13150-016, Lot 109S554, GIBC0). did. Collect the recovered cells using anti-glypican 3 antibody (K6534, 600 g / ml) or negative control It was reacted with the mIgG2 antibody (Biogenesis, M-IgG2a-i, Lot EA990719A, 1 mg / ml) on ice (final antibody concentration: 10 ug / ml).
- a cell growth inhibitor containing an anti-glypican 3 antibody as an active ingredient is provided.
- the present invention also provides a cancer cell growth inhibitor comprising an anti-glybican 3 antibody as an active ingredient.
- the anti-glypican 3 antibody binds to glypican 3 expressed on human hepatoma cell line HuH-7 cells and suppresses cell growth, and is therefore effective as a cell growth inhibitor, particularly a cancer cell inhibitor. .
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DK02741243T DK1411118T3 (da) | 2001-06-22 | 2002-06-21 | Celleproliferationsinhibitorer indeholdende anti-glypican-3-antistof |
EP02741243A EP1411118B1 (en) | 2001-06-22 | 2002-06-21 | Cell proliferation inhibitors containing anti-glypican-3 antibody |
DE60228721T DE60228721D1 (en) | 2001-06-22 | 2002-06-21 | Zellproliferationsinhibitoren mit anti-glypican-3-antikörper |
CA2451493A CA2451493C (en) | 2001-06-22 | 2002-06-21 | Cell growth inhibitors containing anti-glypican 3 antibody |
KR1020097019979A KR100953520B1 (ko) | 2001-06-22 | 2002-06-21 | 항글리피칸 3항체를 포함하는 항암제 |
AU2002315857A AU2002315857B2 (en) | 2001-06-22 | 2002-06-21 | Cell proliferation inhibitors containing anti-glypican 3 antibody |
US10/481,524 US20040236080A1 (en) | 2001-06-22 | 2002-06-21 | Cell proliferation inhibitors containing anti-glypican 3 antibody |
KR1020037016776A KR100877176B1 (ko) | 2001-06-22 | 2002-06-21 | 항글리피칸 3항체를 포함하는 세포증식 억제제 |
JP2003507268A JP4281869B2 (ja) | 2001-06-22 | 2002-06-21 | 抗グリピカン3抗体を含む細胞増殖抑制剤 |
HK05111542A HK1079547A1 (en) | 2001-06-22 | 2005-12-15 | Cell growth inhibitors containing anti-glypican 3 antibody |
US11/702,780 US7744880B2 (en) | 2001-06-22 | 2007-02-05 | Cell growth inhibitors containing anti-glypican 3 antibody |
AU2007201255A AU2007201255B2 (en) | 2001-06-22 | 2007-03-22 | Cell proliferation inhibitors containing anti-glypican 3 antibody |
US12/799,491 US8263077B2 (en) | 2001-06-22 | 2010-04-26 | Cell growth inhibitors containing anti-glypican 3 antibody |
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