WO2013147176A1 - 胆嚢癌の治療及び/又は予防用医薬組成物 - Google Patents
胆嚢癌の治療及び/又は予防用医薬組成物 Download PDFInfo
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- 229960001221 pirarubicin Drugs 0.000 description 1
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- WOLQREOUPKZMEX-UHFFFAOYSA-N pteroyltriglutamic acid Chemical compound C=1N=C2NC(N)=NC(=O)C2=NC=1CNC1=CC=C(C(=O)NC(CCC(=O)NC(CCC(=O)NC(CCC(O)=O)C(O)=O)C(O)=O)C(O)=O)C=C1 WOLQREOUPKZMEX-UHFFFAOYSA-N 0.000 description 1
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- BMKDZUISNHGIBY-UHFFFAOYSA-N razoxane Chemical compound C1C(=O)NC(=O)CN1C(C)CN1CC(=O)NC(=O)C1 BMKDZUISNHGIBY-UHFFFAOYSA-N 0.000 description 1
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- KDYFGRWQOYBRFD-UHFFFAOYSA-L succinate(2-) Chemical compound [O-]C(=O)CCC([O-])=O KDYFGRWQOYBRFD-UHFFFAOYSA-L 0.000 description 1
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- BPEWUONYVDABNZ-DZBHQSCQSA-N testolactone Chemical compound O=C1C=C[C@]2(C)[C@H]3CC[C@](C)(OC(=O)CC4)[C@@H]4[C@@H]3CCC2=C1 BPEWUONYVDABNZ-DZBHQSCQSA-N 0.000 description 1
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- IUCJMVBFZDHPDX-UHFFFAOYSA-N tretamine Chemical compound C1CN1C1=NC(N2CC2)=NC(N2CC2)=N1 IUCJMVBFZDHPDX-UHFFFAOYSA-N 0.000 description 1
- 229950001353 tretamine Drugs 0.000 description 1
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- QORWJWZARLRLPR-UHFFFAOYSA-H tricalcium bis(phosphate) Chemical compound [Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O QORWJWZARLRLPR-UHFFFAOYSA-H 0.000 description 1
- KVJXBPDAXMEYOA-CXANFOAXSA-N trilostane Chemical compound OC1=C(C#N)C[C@]2(C)[C@H]3CC[C@](C)([C@H](CC4)O)[C@@H]4[C@@H]3CC[C@@]32O[C@@H]31 KVJXBPDAXMEYOA-CXANFOAXSA-N 0.000 description 1
- 229960001670 trilostane Drugs 0.000 description 1
- 239000012588 trypsin Substances 0.000 description 1
- HDZZVAMISRMYHH-LITAXDCLSA-N tubercidin Chemical compound C1=CC=2C(N)=NC=NC=2N1[C@@H]1O[C@@H](CO)[C@H](O)[C@H]1O HDZZVAMISRMYHH-LITAXDCLSA-N 0.000 description 1
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- 229960003048 vinblastine Drugs 0.000 description 1
- JXLYSJRDGCGARV-XQKSVPLYSA-N vincaleukoblastine Chemical compound C([C@@H](C[C@]1(C(=O)OC)C=2C(=CC3=C([C@]45[C@H]([C@@]([C@H](OC(C)=O)[C@]6(CC)C=CCN([C@H]56)CC4)(O)C(=O)OC)N3C)C=2)OC)C[C@@](C2)(O)CC)N2CCC2=C1NC1=CC=CC=C21 JXLYSJRDGCGARV-XQKSVPLYSA-N 0.000 description 1
- 229960004528 vincristine Drugs 0.000 description 1
- OGWKCGZFUXNPDA-XQKSVPLYSA-N vincristine Chemical compound C([N@]1C[C@@H](C[C@]2(C(=O)OC)C=3C(=CC4=C([C@]56[C@H]([C@@]([C@H](OC(C)=O)[C@]7(CC)C=CCN([C@H]67)CC5)(O)C(=O)OC)N4C=O)C=3)OC)C[C@@](C1)(O)CC)CC1=C2NC2=CC=CC=C12 OGWKCGZFUXNPDA-XQKSVPLYSA-N 0.000 description 1
- OGWKCGZFUXNPDA-UHFFFAOYSA-N vincristine Natural products C1C(CC)(O)CC(CC2(C(=O)OC)C=3C(=CC4=C(C56C(C(C(OC(C)=O)C7(CC)C=CCN(C67)CC5)(O)C(=O)OC)N4C=O)C=3)OC)CN1CCC1=C2NC2=CC=CC=C12 OGWKCGZFUXNPDA-UHFFFAOYSA-N 0.000 description 1
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- UGGWPQSBPIFKDZ-KOTLKJBCSA-N vindesine Chemical compound C([C@@H](C[C@]1(C(=O)OC)C=2C(=CC3=C([C@]45[C@H]([C@@]([C@H](O)[C@]6(CC)C=CCN([C@H]56)CC4)(O)C(N)=O)N3C)C=2)OC)C[C@@](C2)(O)CC)N2CCC2=C1N=C1[C]2C=CC=C1 UGGWPQSBPIFKDZ-KOTLKJBCSA-N 0.000 description 1
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Classifications
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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
-
- 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
- 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
- A61K39/39533—Antibodies; Immunoglobulins; Immune serum, e.g. antilymphocytic serum against materials from animals
- A61K39/39558—Antibodies; Immunoglobulins; Immune serum, e.g. antilymphocytic serum against materials from animals against tumor tissues, cells, antigens
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K45/00—Medicinal preparations containing active ingredients not provided for in groups A61K31/00 - A61K41/00
- A61K45/06—Mixtures of active ingredients without chemical characterisation, e.g. antiphlogistics and cardiaca
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K47/00—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient
- A61K47/50—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient the non-active ingredient being chemically bound to the active ingredient, e.g. polymer-drug conjugates
- A61K47/51—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient the non-active ingredient being chemically bound to the active ingredient, e.g. polymer-drug conjugates the non-active ingredient being a modifying agent
- A61K47/68—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient the non-active ingredient being chemically bound to the active ingredient, e.g. polymer-drug conjugates the non-active ingredient being a modifying agent the modifying agent being an antibody, an immunoglobulin or a fragment thereof, e.g. an Fc-fragment
- A61K47/6835—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient the non-active ingredient being chemically bound to the active ingredient, e.g. polymer-drug conjugates the non-active ingredient being a modifying agent the modifying agent being an antibody, an immunoglobulin or a fragment thereof, e.g. an Fc-fragment the modifying agent being an antibody or an immunoglobulin bearing at least one antigen-binding site
- A61K47/6851—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient the non-active ingredient being chemically bound to the active ingredient, e.g. polymer-drug conjugates the non-active ingredient being a modifying agent the modifying agent being an antibody, an immunoglobulin or a fragment thereof, e.g. an Fc-fragment the modifying agent being an antibody or an immunoglobulin bearing at least one antigen-binding site the antibody targeting a determinant of a tumour cell
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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
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K14/00—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof
- C07K14/435—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans
- C07K14/46—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans from vertebrates
- C07K14/47—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans from vertebrates from mammals
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K2317/00—Immunoglobulins specific features
- C07K2317/20—Immunoglobulins specific features characterized by taxonomic origin
- C07K2317/23—Immunoglobulins specific features characterized by taxonomic origin from birds
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K2317/00—Immunoglobulins specific features
- C07K2317/20—Immunoglobulins specific features characterized by taxonomic origin
- C07K2317/24—Immunoglobulins specific features characterized by taxonomic origin containing regions, domains or residues from different species, e.g. chimeric, humanized or veneered
-
- 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
-
- 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]
Definitions
- the present invention relates to a pharmaceutical use of an antibody against CAPRIN-1 protein or a fragment thereof as a therapeutic and / or preventive agent for gallbladder cancer.
- gallbladder cancer is a cancer that has few subjective symptoms and early symptoms, and is very difficult to detect early, and progresses such as lymph node metastasis, liver metastasis, lung metastasis, bone metastasis, and peritoneal dissemination.
- Gallbladder cancer is very difficult to treat, and the 5-year survival rate of patients with gallbladder cancer that is not suitable for surgery is almost zero, and the treatment for gallbladder cancer that is very difficult and effective is It is known as technical common sense of those skilled in the art that it has not been developed.
- Cytoplasmic- and propagation-associated protein 1 (CAPRIN-1) is expressed when quiescent normal cells are activated or undergo cell division, and forms RNA and intracellular stress granules within the cell to transport mRNA. It was known as an intracellular protein known to be involved in the regulation of translation, but it was found to be expressed specifically on the surface of cancer cells such as breast cancer cells. Research is progressing as a target for antibody drugs (Patent Document 1). However, Patent Document 1 does not confirm that CAPRIN-1 protein is expressed on gallbladder cancer cells, and there is no description or suggestion that CAPRIN-1 protein can be an antigen protein of gallbladder cancer.
- An object of the present invention is to identify a cancer antigen protein that is expressed on the surface of gallbladder cancer cells, and to provide a use of an antibody targeting it as a therapeutic and / or preventive agent for gallbladder cancer.
- the present inventor has found that a part of the CAPRIN-1 protein is expressed on the cell surface of gallbladder cancer cells, and further, an antibody against the CAPRIN-1 protein expresses the CAPRIN-1 protein.
- the inventors have found that gallbladder cancer cells are damaged, and have completed the present invention.
- the present invention has the following features.
- the present invention is an amino acid sequence represented by an even sequence number among SEQ ID NOs: 2 to 30, or 80% or more, preferably 85% or more, more preferably 90% or more, and still more preferably 95% or more with the amino acid sequence.
- CAPRIN-1 protein having an amino acid sequence having sequence identity, or a fragment thereof containing 7 or more consecutive amino acid residues in the amino acid sequence of the protein, and an antibody or fragment thereof having immunological reactivity
- the antibody is a monoclonal antibody or a polyclonal antibody.
- the antibody is a human antibody, a humanized antibody, a chimeric antibody, a single chain antibody, or a multispecific antibody.
- the antibody has the amino acid sequence represented by SEQ ID NO: 271, SEQ ID NO: 273, SEQ ID NO: 266, SEQ ID NO: 270, SEQ ID NO: 272, or SEQ ID NO: 269, or 80% or more of the amino acid sequence, preferably Is an antibody having immunological reactivity with a peptide or fragment thereof having an amino acid sequence having a sequence identity of 85% or more, more preferably 90% or more, and still more preferably 95% or more.
- the antibody is any of the following antibodies (a) to (ao), and has an immunological reactivity with the CAPRIN-1 protein or the like, or the antibody: A pharmaceutical composition for treating and / or preventing gallbladder cancer, comprising as an active ingredient.
- A a heavy chain variable region comprising complementarity determining regions (CDR1, CDR2, CDR3, respectively) consisting of the amino acid sequences represented by SEQ ID NOs: 37, 38 and 39, and amino acid sequences represented by SEQ ID NOs: 41, 42 and 43 And a light chain variable region comprising a complementarity determining region (CDR1, CDR2, CDR3, respectively).
- C a heavy chain variable region comprising complementarity determining regions (CDR1, CDR2, CDR3, respectively) consisting of the amino acid sequences represented by SEQ ID NOs: 57, 58 and 59, and amino acid sequences represented by SEQ ID NOs: 61, 62 and 63 And a light chain variable region comprising a complementarity determining region (CDR1, CDR2, CDR3, respectively).
- CDR1, CDR2, CDR3, respectively consisting of the amino acid sequences represented by SEQ ID NOs: 77, 78 and 79, and amino acid sequences represented by SEQ ID NOs: 81, 82 and 83
- a light chain variable region comprising a complementarity determining region (CDR1, CDR2, CDR3, respectively).
- CDR1, CDR2, CDR3, respectively consisting of the amino acid sequences represented by SEQ ID NOs: 87, 88 and 89, and amino acid sequences represented by SEQ ID NOs: 91, 92 and 93
- a light chain variable region comprising a complementarity determining region (CDR1, CDR2, CDR3, respectively).
- a heavy chain variable region comprising complementarity determining regions (CDR1, CDR2, CDR3, respectively) consisting of the amino acid sequences represented by SEQ ID NOs: 107, 108, and 109, and amino acid sequences represented by SEQ ID NOs: 111, 112, and 113 And a light chain variable region comprising a complementarity determining region (CDR1, CDR2, CDR3, respectively).
- a heavy chain variable region comprising complementarity determining regions (CDR1, CDR2, CDR3, respectively) consisting of the amino acid sequences represented by SEQ ID NOs: 117, 118, and 119, and amino acid sequences represented by SEQ ID NOs: 121, 122, and 123
- a light chain variable region comprising a complementarity determining region (CDR1, CDR2, CDR3, respectively).
- a heavy chain variable region comprising complementarity determining regions (CDR1, CDR2, CDR3, respectively) consisting of the amino acid sequences represented by SEQ ID NOs: 127, 128, and 129, and amino acid sequences represented by SEQ ID NOs: 121, 122, and 123
- a light chain variable region comprising a complementarity determining region (CDR1, CDR2, CDR3, respectively).
- (K) a heavy chain variable region comprising complementarity determining regions (CDR1, CDR2, CDR3, respectively) consisting of the amino acid sequences represented by SEQ ID NOs: 132, 133, and 134, and an amino acid sequence represented by SEQ ID NOs: 136, 137, and 138 And a light chain variable region comprising a complementarity determining region (CDR1, CDR2, CDR3, respectively).
- (L) a heavy chain variable region comprising complementarity determining regions (CDR1, CDR2, CDR3, respectively) consisting of the amino acid sequences represented by SEQ ID NOs: 142, 143, and 144, and amino acid sequences represented by SEQ ID NOs: 146, 147, and 148 And a light chain variable region comprising a complementarity determining region (CDR1, CDR2, CDR3, respectively).
- CDR1, CDR2, CDR3, respectively consisting of the amino acid sequences represented by SEQ ID NOs: 142, 143, and 144, and amino acid sequences represented by SEQ ID NOs: 146, 147, and 148
- a light chain variable region comprising a complementarity determining region (CDR1, CDR2, CDR3, respectively).
- (M) a heavy chain variable region comprising complementarity determining regions (CDR1, CDR2, CDR3, respectively) consisting of the amino acid sequences represented by SEQ ID NOs: 142, 143, and 144, and amino acid sequences represented by SEQ ID NOs: 152, 153, and 154 And a light chain variable region comprising a complementarity determining region (CDR1, CDR2, CDR3, respectively).
- N a heavy chain variable region comprising complementarity determining regions (CDR1, CDR2, CDR3, respectively) consisting of the amino acid sequences represented by SEQ ID NOs: 157, 158 and 159, and amino acid sequences represented by SEQ ID NOs: 161, 162 and 163 And a light chain variable region comprising a complementarity determining region (CDR1, CDR2, CDR3, respectively).
- the heavy chain variable region comprising the complementarity determining regions (CDR1, CDR2, CDR3, respectively) consisting of the amino acid sequences represented by SEQ ID NOs: 167, 168 and 169, and the amino acid sequences represented by SEQ ID NOs: 171, 172 and 173
- a light chain variable region comprising a complementarity determining region (CDR1, CDR2, CDR3, respectively).
- the heavy chain variable region comprising the complementarity determining regions (CDR1, CDR2, CDR3, respectively) consisting of the amino acid sequences represented by SEQ ID NOs: 167, 168 and 169, and the amino acid sequences represented by SEQ ID NOs: 182, 183 and 184 And a light chain variable region comprising a complementarity determining region (CDR1, CDR2, CDR3, respectively).
- R a heavy chain variable region comprising a complementarity determining region (CDR1, CDR2, CDR3, respectively) consisting of the amino acid sequences represented by SEQ ID NOs: 167, 168 and 169, and the amino acid sequence represented by SEQ ID NOs: 187, 188 and 189 And a light chain variable region comprising a complementarity determining region (CDR1, CDR2, CDR3, respectively).
- CDR1, CDR2, CDR3, respectively consisting of the amino acid sequences represented by SEQ ID NOs: 167, 168 and 169, and the amino acid sequence represented by SEQ ID NOs: 187, 188 and 189
- a light chain variable region comprising a complementarity determining region (CDR1, CDR2, CDR3, respectively).
- (S) a heavy chain variable region comprising complementarity determining regions (CDR1, CDR2, CDR3, respectively) consisting of the amino acid sequences represented by SEQ ID NOs: 167, 168, and 169, and amino acid sequences represented by SEQ ID NOs: 192, 193, and 194 And a light chain variable region comprising a complementarity determining region (CDR1, CDR2, CDR3, respectively).
- CDR1, CDR2, CDR3, respectively consisting of the amino acid sequences represented by SEQ ID NOs: 167, 168, and 169, and amino acid sequences represented by SEQ ID NOs: 192, 193, and 194
- a light chain variable region comprising a complementarity determining region (CDR1, CDR2, CDR3, respectively).
- T the heavy chain variable region comprising the complementarity determining regions (CDR1, CDR2, CDR3, respectively) consisting of the amino acid sequences represented by SEQ ID NOs: 197, 198 and 199, and the amino acid sequences represented by SEQ ID NOs: 201, 202 and 203
- a light chain variable region comprising a complementarity determining region (CDR1, CDR2, CDR3, respectively).
- (U) a heavy chain variable region comprising complementarity determining regions (CDR1, CDR2, CDR3, respectively) consisting of the amino acid sequences represented by SEQ ID NOs: 207, 208 and 209, and amino acid sequences represented by SEQ ID NOs: 211, 212 and 213 And a light chain variable region comprising a complementarity determining region (CDR1, CDR2, CDR3, respectively).
- CDR1, CDR2, CDR3, respectively consisting of the amino acid sequences represented by SEQ ID NOs: 207, 208 and 209, and amino acid sequences represented by SEQ ID NOs: 211, 212 and 213
- a light chain variable region comprising a complementarity determining region (CDR1, CDR2, CDR3, respectively).
- V the heavy chain variable region comprising the complementarity determining regions (CDR1, CDR2, CDR3, respectively) consisting of the amino acid sequences represented by SEQ ID NOs: 217, 218, and 219, and the amino acid sequences represented by SEQ ID NOs: 221, 222, and 223 And a light chain variable region comprising a complementarity determining region (CDR1, CDR2, CDR3, respectively).
- (W) a heavy chain variable region comprising complementarity determining regions (CDR1, CDR2, CDR3, respectively) consisting of the amino acid sequences represented by SEQ ID NOs: 227, 228, and 229, and amino acid sequences represented by SEQ ID NOs: 231, 232, and 233 And a light chain variable region comprising a complementarity determining region (CDR1, CDR2, CDR3, respectively).
- CDR1, CDR2, CDR3, respectively consisting of the amino acid sequences represented by SEQ ID NOs: 227, 228, and 229, and amino acid sequences represented by SEQ ID NOs: 231, 232, and 233
- a light chain variable region comprising a complementarity determining region (CDR1, CDR2, CDR3, respectively).
- (X) the heavy chain variable region comprising the complementarity determining regions (CDR1, CDR2, CDR3, respectively) consisting of the amino acid sequences represented by SEQ ID NOs: 237, 238 and 239, and the amino acid sequences represented by SEQ ID NOs: 241, 242, and 243 And a light chain variable region comprising a complementarity determining region (CDR1, CDR2, CDR3, respectively).
- Y a heavy chain variable region comprising complementarity determining regions (CDR1, CDR2, CDR3, respectively) consisting of the amino acid sequences represented by SEQ ID NOs: 247, 248 and 249, and amino acid sequences represented by SEQ ID NOs: 251, 252 and 253 And a light chain variable region comprising a complementarity determining region (CDR1, CDR2, CDR3, respectively).
- (Z) a heavy chain variable region comprising a complementarity determining region (CDR1, CDR2, CDR3, respectively) consisting of the amino acid sequences represented by SEQ ID NOs: 276, 277 and 278 and the amino acid sequence represented by SEQ ID NOs: 280, 281 and 282 And a light chain variable region comprising a complementarity determining region (CDR1, CDR2, CDR3, respectively).
- CDR1, CDR2, CDR3, respectively consisting of the amino acid sequences represented by SEQ ID NOs: 276, 277 and 278 and the amino acid sequence represented by SEQ ID NOs: 280, 281 and 282
- a light chain variable region comprising a complementarity determining region (CDR1, CDR2, CDR3, respectively).
- a heavy chain variable region comprising complementarity determining regions (CDR1, CDR2, CDR3, respectively) consisting of the amino acid sequences represented by SEQ ID NOs: 276, 277 and 278, and the amino acid sequences represented by SEQ ID NOs: 286, 287 and 288 And a light chain variable region comprising a complementarity determining region (CDR1, CDR2, CDR3, respectively).
- (Ab) a heavy chain variable region comprising a complementarity determining region (CDR1, CDR2, CDR3, respectively) consisting of the amino acid sequences represented by SEQ ID NOs: 291, 292 and 293, and an amino acid sequence represented by SEQ ID NOs: 295, 296 and 297 And a light chain variable region comprising a complementarity determining region (CDR1, CDR2, CDR3, respectively).
- CDR1, CDR2, CDR3, respectively consisting of the amino acid sequences represented by SEQ ID NOs: 291, 292 and 293, and an amino acid sequence represented by SEQ ID NOs: 295, 296 and 297
- a light chain variable region comprising a complementarity determining region (CDR1, CDR2, CDR3, respectively).
- (Ac) a heavy chain variable region comprising a complementarity determining region (CDR1, CDR2, CDR3, respectively) consisting of the amino acid sequences represented by SEQ ID NOs: 301, 302 and 303, and an amino acid sequence represented by SEQ ID NOs: 305, 306 and 307 And a light chain variable region comprising a complementarity determining region (CDR1, CDR2, CDR3, respectively).
- CDR1, CDR2, CDR3, respectively consisting of the amino acid sequences represented by SEQ ID NOs: 301, 302 and 303, and an amino acid sequence represented by SEQ ID NOs: 305, 306 and 307
- a light chain variable region comprising a complementarity determining region (CDR1, CDR2, CDR3, respectively).
- a heavy chain variable region comprising complementarity determining regions (CDR1, CDR2, CDR3, respectively) consisting of the amino acid sequences represented by SEQ ID NOs: 311, 312 and 313, and amino acid sequences represented by SEQ ID NOs: 315, 316 and 317
- a light chain variable region comprising a complementarity determining region (CDR1, CDR2, CDR3, respectively).
- a heavy chain variable region comprising a complementarity determining region (CDR1, CDR2, CDR3, respectively) consisting of the amino acid sequences represented by SEQ ID NOs: 321, 322, and 323 and an amino acid sequence represented by SEQ ID NOs: 325, 326, and 327
- a light chain variable region comprising a complementarity determining region (CDR1, CDR2, CDR3, respectively).
- a heavy chain variable region comprising complementarity determining regions (CDR1, CDR2, CDR3, respectively) consisting of the amino acid sequences represented by SEQ ID NOs: 331, 332, and 333 and amino acid sequences represented by SEQ ID NOs: 335, 336, and 337 And a light chain variable region comprising a complementarity determining region (CDR1, CDR2, CDR3, respectively).
- a heavy chain variable region comprising complementarity determining regions (CDR1, CDR2, CDR3, respectively) consisting of the amino acid sequences represented by SEQ ID NOs: 341, 342, and 343, and an amino acid sequence represented by SEQ ID NOs: 345, 346, and 347
- a light chain variable region comprising a complementarity determining region (CDR1, CDR2, CDR3, respectively).
- a heavy chain variable region comprising complementarity determining regions (CDR1, CDR2, CDR3, respectively) consisting of the amino acid sequences represented by SEQ ID NOs: 351, 352, and 353 and amino acid sequences represented by SEQ ID NOs: 354, 355, and 356
- a light chain variable region comprising a complementarity determining region (CDR1, CDR2, CDR3, respectively).
- a heavy chain variable region comprising complementarity determining regions (CDR1, CDR2, CDR3, respectively) consisting of the amino acid sequences represented by SEQ ID NOs: 351, 352, and 357 and amino acid sequences represented by SEQ ID NOs: 354, 355, and 356 And a light chain variable region comprising a complementarity determining region (CDR1, CDR2, CDR3, respectively).
- (Ak) a heavy chain variable region comprising the complementarity determining regions (CDR1, CDR2, CDR3) of the amino acid sequences represented by SEQ ID NOs: 383, 384, and 385 and the amino acid sequences represented by SEQ ID NOs: 387, 388, and 389, respectively.
- An antibody comprising a light chain variable region comprising complementarity determining regions (CDR1, CDR2, CDR3, respectively).
- An antibody comprising a light chain variable region comprising complementarity determining regions (CDR1, CDR2, CDR3, respectively).
- a heavy chain variable region comprising a complementarity determining region (CDR1, CDR2, CDR3, respectively) consisting of the amino acid sequences represented by SEQ ID NOs: 398, 399, and 400, and an amino acid sequence represented by SEQ ID NOs: 402, 403, and 404 And a light chain variable region comprising a complementarity determining region (CDR1, CDR2, CDR3, respectively).
- CDR1, CDR2, CDR3, respectively consisting of the amino acid sequences represented by SEQ ID NOs: 398, 399, and 400, and an amino acid sequence represented by SEQ ID NOs: 402, 403, and 404
- a light chain variable region comprising a complementarity determining region (CDR1, CDR2, CDR3, respectively).
- the heavy chain variable region including the complementarity determining regions of SEQ ID NOs: 408, 409, and 410 (CDR1, CDR2, CDR3, respectively) and the complementarity determining regions of SEQ ID NOs: 412, 413, and 414 (respectively CDR1, CDR2, CDR3)
- a light chain variable region comprising a light chain variable region.
- the heavy chain variable region comprising the complementarity determining regions of SEQ ID NOs: 418, 419 and 420 (CDR1, CDR2, CDR3, respectively) and the complementarity determining regions of SEQ ID NOS: 422, 423 and 424 (CDR1, CDR2, CDR3, respectively)
- a light chain variable region comprising a light chain variable region.
- the antibody of the present invention or a fragment thereof is conjugated with an antitumor agent.
- the present invention further provides a combined pharmaceutical comprising the above-described pharmaceutical composition of the present invention and a pharmaceutical composition containing an antitumor agent.
- the present invention further provides a method for treating and / or preventing gallbladder cancer, which comprises administering to a subject the above pharmaceutical composition or the above combined pharmaceutical of the present invention.
- an antibody against the CAPRIN-1 protein used in the present invention (hereinafter often referred to as “anti-CAPRIN-1 antibody”) damages gallbladder cancer cells. Therefore, antibodies against CAPRIN-1 protein are useful for the treatment and prevention of gallbladder cancer.
- the antitumor activity of an antibody against a polypeptide consisting of the amino acid sequence represented by an even sequence number among SEQ ID NOs: 2 to 30 used in the present invention is determined by examining the suppression of tumor growth in cancer-bearing animals in vivo. Alternatively, as described later, it can be evaluated by examining whether tumor cells expressing the polypeptide in vitro exhibit cytotoxic activity via immune cells or complement.
- nucleotide sequences of the polynucleotides encoding the proteins consisting of the amino acid sequences of even sequence numbers (ie, SEQ ID NOs: 2, 4, 6,. It is shown by the odd number sequence number (namely, sequence number 1,3,5..27,29) among 29.
- the amino acid sequences represented by SEQ ID NOs: 6, 8, 10, 12, and 14 in the sequence listing are specific in the serum derived from cancer-bearing dogs by the SEREX method using a cDNA library derived from dog testis tissue and the serum of dogs with breast cancer.
- the amino acid sequence shown in SEQ ID NOs: 2 and 4 is a human homologous factor (homologue or ortholog), and the amino acid sequence shown in SEQ ID NO: 16 is a bovine homologous factor.
- the amino acid sequence shown in SEQ ID NO: 18 is the equine homologous factor
- the amino acid sequence shown in SEQ ID NOs: 20-28 is the mouse homologous factor
- the amino acid sequence shown in SEQ ID NO: 30 is the chicken homologous factor.
- CAPRIN-1 protein is expressed on the cell surface of gallbladder cancer cells.
- an antibody that binds to a portion of the CAPRIN-1 protein that is expressed on the cell surface of gallbladder cancer cells is preferably used.
- preferably 90% or more still more preferably 95% or more, such as 96% or more, 97% or more, 98% or more, 99% or more, etc.
- examples include partial peptides containing residues, and antibodies used in the present invention include all antibodies that bind to these peptides and exhibit antitumor activity.
- the anti-CAPRIN-1 antibody used in the present invention may be any kind of antibody as long as it can exhibit antitumor activity.
- monoclonal antibody, polyclonal antibody, recombinant antibody such as synthetic antibody, multispecificity Examples include antibodies (eg, diabodies, triabodies, etc.), humanized antibodies, chimeric antibodies, single chain antibodies (scFv), and the like, and human antibodies, antibody fragments thereof, such as Fab, F (ab ′) 2 , Fv, and the like. These antibodies and fragments thereof can also be prepared by methods known to those skilled in the art.
- an antibody capable of specifically binding to the CAPRIN-1 protein is desirable, and a monoclonal antibody is preferable, but a polyclonal antibody may be used as long as a homogeneous antibody can be stably produced. .
- a test subject is a human, it is desirable that it is a human antibody or a humanized antibody in order to avoid or suppress rejection.
- CAPRIN-1 protein specifically binds to CAPRIN-1 protein and does not substantially bind to other proteins.
- the antitumor activity of the antibody that can be used in the present invention is determined by examining the suppression of tumor growth in a cancer-bearing animal in vivo, or against tumor cells that express the polypeptide in vitro. Thus, it can be evaluated by examining whether it shows cytotoxic activity via immune cells or complement.
- the subject who is the target of treatment and / or prevention of gallbladder cancer in the present invention is a mammal such as a human, pet animal, livestock, and sport animal, and the preferred subject is a human.
- the protein used as a sensitizing antigen for obtaining the anti-CAPRIN-1 antibody used in the present invention or a fragment thereof is used for animal species derived from it, such as humans, dogs, cows, horses, mice, rats and chickens. Not limited. However, it is preferable to select in consideration of compatibility with the parent cell used for cell fusion. In general, a protein derived from a mammal is preferable, and a protein derived from a human is particularly preferable. For example, when the CAPRIN-1 protein is a human CAPRIN-1 protein, a human CAPRIN-1 protein, a partial peptide thereof, a cell that expresses a human CAPRIN-1 protein, or the like can be used.
- the base sequence and amino acid sequence of the human CAPRIN-1 protein and its homologue are accessed, for example, by GenBank (NCBI, USA) and algorithms such as BLAST and FASTA (Karlin and Altschul, Proc. Natl. Acad. Sci. USA, 90: 5873. -5877, 1993; Altschul et al., Nucleic Acids Res. 25: 3389-3402, 1997).
- the base sequence or amino acid sequence of these ORFs or mature portions is 70% To 100%, preferably 80% to 100%, more preferably 90% to 100%, more preferably 95% to 100%, such as 97% to 100%, 98% to 100%, 99% to 100% or 99
- a target is a nucleic acid or protein consisting of a sequence having 5% to 100% sequence identity.
- “% sequence identity” refers to an amino acid (or an alignment) when two sequences are aligned (aligned) for maximum similarity or identity with or without gaps. The percentage (%) of the same amino acid (or base) with respect to the total number of bases.
- the CAPRIN-1 protein fragment has a length less than the total length of the protein from the amino acid length of the epitope (antigenic determinant), which is the smallest unit recognized by the antibody.
- An epitope refers to a polypeptide fragment that has antigenicity or immunogenicity in a mammal, preferably a human, and its minimum unit consists of about 7 to 12 amino acids, such as 8 to 11 amino acids.
- amino acid sequence represented by SEQ ID NO: 273, SEQ ID NO: 266, SEQ ID NO: 270, SEQ ID NO: 272, or SEQ ID NO: 269 or the amino acid sequence of 80% or more, preferably 85% or more, more preferably 90
- polypeptides including human CAPRIN-1 protein and partial peptides thereof are synthesized according to chemical synthesis methods such as Fmoc method (fluorenylmethyloxycarbonyl method) and tBoc method (t-butyloxycarbonyl method), for example.
- Fmoc method fluorenylmethyloxycarbonyl method
- tBoc method t-butyloxycarbonyl method
- DNA encoding the above polypeptide is prepared, and the DNA is incorporated into an expression vector and introduced into a host cell. , By producing the peptide in host cells, it is possible to obtain the peptide of interest.
- the DNA encoding the polypeptide can be easily prepared by a known genetic engineering technique or a conventional method using a commercially available nucleic acid synthesizer.
- DNA containing the nucleotide sequence of SEQ ID NO: 1 is subjected to PCR using a pair of primers designed to amplify the nucleotide sequence described in SEQ ID NO: 1, using a human chromosome or cDNA library as a template.
- PCR reaction conditions can be appropriately set. For example, using a thermostable DNA polymerase (eg, Taq polymerase) and a Mg 2+ -containing PCR buffer, the reaction temperature is 94 ° C. for 30 seconds (denaturation), and 55 ° C.
- a thermostable DNA polymerase eg, Taq polymerase
- Mg 2+ -containing PCR buffer the reaction temperature is 94 ° C. for 30 seconds (denaturation), and 55 ° C.
- the reaction process consisting of 1 minute (annealing) and 2 minutes (elongation) at 72 ° C. is defined as one cycle.
- the reaction may be performed at 72 ° C. for 7 minutes after 30 cycles, but is not limited thereto.
- the PCR method, conditions, etc. are described in, for example, Ausubel et al., Short Protocols in Molecular Biology, 3rd Edition, A compendium of Methods from Current Protocols in Molecular Biology (1995), J ing.
- probes and primers are prepared based on the nucleotide sequence and amino acid sequence information shown in SEQ ID NOs: 1 to 30 in the sequence listing in this specification, and a human or other cDNA library is screened using the probes and primers. By doing so, the desired DNA can be isolated.
- the cDNA library is preferably prepared from cells, organs or tissues expressing a protein having an even sequence number among SEQ ID NOs: 2 to 30. Examples of such cells and tissues are cells or tissues derived from cancer or tumors such as testis, leukemia, breast cancer, lymphoma, brain tumor, lung cancer, colon cancer, gallbladder cancer.
- the host cell may be any cell that can express the polypeptide.
- prokaryotic cells include Escherichia coli
- examples of eukaryotic cells include monkey kidney cells COS1, Chinese hamster ovary cells.
- examples include, but are not limited to, mammalian cells such as CHO, human embryonic kidney cell line HEK293, mouse embryonic skin cell line NIH3T3, yeast cells such as budding yeast and fission yeast, silkworm cells, and Xenopus egg cells.
- the expression vector When a prokaryotic cell is used as a host cell, the expression vector includes an origin, promoter, ribosome binding site, multicloning site, terminator, drug resistance gene, auxotrophic complementary gene, etc. that can be replicated in the prokaryotic cell. Is used. Examples of the expression vector for E. coli include pUC system, pBluescript II, pET expression system, pGEX expression system and the like.
- a prokaryotic host cell is transformed with the vector, and the resulting transformant is cultured, the polypeptide encoded by the DNA is prokaryotic. It can be expressed in a host cell. In this case, the polypeptide can also be expressed as a fusion protein with another protein.
- an expression vector for a eukaryotic cell having a promoter, a splicing region, a poly (A) addition site and the like is used as an expression vector.
- expression vectors include pKA1, pCDM8, pSVK3, pMSG, pSVL, pBK-CMV, pBK-RSV, EBV vector, pRS, pcDNA3, pYES2, and the like.
- pIND / V5-His pFLAG-CMV-2, pEGFP-N1, pEGFP-C1, etc.
- a His tag eg (His) 6 to (His) 10
- FLAG tag eg (His) 10
- myc tag eg (His) 6 to (His) 10
- the polypeptide can be expressed as a fusion protein to which various tags such as HA tag and GFP are added.
- a well-known method such as electroporation, calcium phosphate method, liposome method, DEAE dextran method, microinjection, virus infection, lipofection, binding to a cell membrane-permeable peptide, etc. can be used. .
- the target polypeptide from the host cell can be performed by combining known separation operations. For example, treatment with denaturing agents and surfactants such as urea, sonication, enzyme digestion, salting out and solvent fractional precipitation, dialysis, centrifugation, ultrafiltration, gel filtration, SDS-PAGE, isoelectric focusing, Examples include, but are not limited to, ion exchange chromatography, hydrophobic chromatography, affinity chromatography, and reverse phase chromatography.
- An antibody is usually a heteromultimeric glycoprotein comprising at least two heavy chains and two light chains. Apart from IgM, it is a heterotetrameric glycoprotein of about 150 kDa composed of two identical light (L) chains and two identical heavy (H) chains. Typically, each light chain is linked to the heavy chain by one disulfide covalent bond, but the number of disulfide bonds between the heavy chains of different immunoglobulin isotypes varies. Each heavy and light chain also has intrachain disulfide bonds. Each heavy chain has at one end a variable domain (VH region) followed by several constant regions. Each light chain has a variable domain (VL region) and one constant region at the opposite end.
- VH region variable domain
- VL region variable domain
- the constant region of the light chain is aligned with the first constant region of the heavy chain, and the light chain variable domain is aligned with the variable domain of the heavy chain.
- the variable domain of an antibody confers binding specificity on the antibody by exhibiting specific variability, in which a specific region is called a complementarity determining region (CDR).
- CDR complementarity determining region
- the relatively conserved portion of the variable region is called the framework region (FR).
- the complete heavy and light chain variable domains each contain 4 FRs linked by 3 CDRs.
- the three CDRs are called CDRH1, CDRH2, CDRH3 from the N-terminal in the heavy chain, and similarly called CDRL1, CDRL2, CDRL3 in the light chain.
- CDRH3 is most important for the binding specificity of the antibody to the antigen.
- the CDRs of each chain are held together in a state closer to the FR region, and contribute to the formation of an antigen binding site of the antibody together with the CDR from the other chain.
- the constant region does not contribute directly to the binding of the antibody to the antigen, but is involved in various effector functions such as antibody-dependent cellular cytotoxicity (ADCC), phagocytosis through binding to Fc ⁇ receptors,
- Figure 6 shows half-life / clearance rate through neonatal Fc receptor (FcRn), complement dependent cytotoxicity (CDC) through the C1q component of the complement cascade.
- the anti-CAPRIN-1 antibody in the present invention means an antibody having immunological reactivity with the full length of a CAPRIN-1 protein or a fragment thereof.
- immunological reactivity means the property of binding between an antibody and a CAPRIN-1 antigen in vivo, and damages the tumor through such binding (eg, death, suppression or regression). Function. That is, the antibody used in the present invention is not limited as long as it can bind to the CAPRIN-1 protein and damage gallbladder cancer.
- antibodies include monoclonal antibodies, polyclonal antibodies, synthetic antibodies, multispecific antibodies, human antibodies, humanized antibodies, chimeric antibodies, single chain antibodies, antibody fragments (eg, Fab, F (ab ′) 2 , Fv, etc.) Etc.
- the antibodies can be of any class of immunoglobulin molecules, e.g. IgG, IgE, IgM, IgA, IgD and IgY, or any subclass, such as IgG 1, IgG 2, IgG 3 , IgG 4, IgA 1, IgA 2 , etc. It is.
- the antibody may be further modified by glycosylation, acetylation, formylation, amidation, phosphorylation, PEGylation, or the like.
- the antibody is a monoclonal antibody
- CAPRIN-1 protein, gallbladder cancer cells expressing CAPRIN-1 protein, or a cell line thereof eg, TGBC14TKB
- CAPRIN-1 protein, gallbladder cancer cells expressing CAPRIN-1 protein, or a cell line thereof eg, TGBC14TKB
- the cells are fused with mouse myeloma cells, and a clone producing an antibody having a cancer cell growth inhibitory action is selected from the obtained fused cells (hybridoma). It can be prepared by isolating a monoclonal antibody-producing hybridoma having cancer cell growth inhibitory action, culturing the hybridoma, and purifying the antibody from the culture supernatant by a general affinity purification method.
- a hybridoma producing a monoclonal antibody can also be produced, for example, as follows.
- an animal is immunized with a sensitizing antigen according to a known method.
- a sensitizing antigen is injected into a mammal intraperitoneally or subcutaneously.
- the sensitizing antigen is diluted to an appropriate amount with PBS (Phosphate-Buffered Saline), physiological saline, or the like, and mixed with an appropriate amount of an ordinary adjuvant, for example, Freund's complete adjuvant, if necessary, and emulsified.
- PBS Phosphate-Buffered Saline
- physiological saline or the like
- an ordinary adjuvant for example, Freund's complete adjuvant, if necessary, and emulsified.
- the mammal is dosed several times every 4-21 days.
- an appropriate carrier can be used during immunization with the sensitizing antigen.
- immune cells are collected from the mammal and subjected to cell fusion. Can be mentioned.
- Mammalian myeloma cells are used as the other parent cell to be fused with the immune cells.
- This myeloma cell is known in various known cell lines such as P3U1 (P3-X63Ag8U1), P3 (P3x63Ag8.653) (J. Immunol. (1979) 123, 1548-1550), P3x63Ag8U. 1 (Current Topics in Microbiology and Immunology (1978) 81, 1-7), NS-1 (Kohler. G. and Milstein, C. Eur. J. Immunol. (1976) 6, 511-511) (Margulies.
- the cell fusion between the immune cell and myeloma cell is basically performed by a known method, for example, the method of Kohler and Milstein et al. (Kohler, G. and Milstein, C. Methods Enzymol. (1981) 73, 3-46. ) And the like.
- the cell fusion is performed, for example, in a normal nutrient culture medium in the presence of a cell fusion promoter.
- a cell fusion promoter for example, polyethylene glycol (PEG), Sendai virus (HVJ), or the like is used as the fusion promoter, and an auxiliary agent such as dimethyl sulfoxide can be added and used to increase the fusion efficiency as desired.
- the usage ratio of immune cells and myeloma cells can be arbitrarily set.
- the number of immune cells is preferably 1 to 10 times that of myeloma cells.
- the culture solution used for the cell fusion for example, RPMI1640 culture solution suitable for growth of the myeloma cell line, MEM culture solution, and other normal culture solutions used for this kind of cell culture can be used.
- Serum replacement fluid 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 medium, and a PEG solution (for example, an average molecular weight of about 1000 to 6000) preliminarily heated to about 37 ° C. is usually 30 to 60% (
- the desired hybridoma is formed by adding at a concentration of w / v) and mixing.
- cell fusion agents and the like that are undesirable for the growth of the hybridoma are removed by sequentially adding an appropriate culture medium and centrifuging to remove the supernatant.
- the hybridoma thus obtained is selected by culturing in a normal selective culture solution, for example, a HAT culture solution (a culture solution containing hypoxanthine, aminopterin and thymidine). Culturing with the HAT culture solution is continued for a sufficient time (usually several days to several weeks) for cells other than the target hybridoma (non-fusion cells) to die. Subsequently, the usual limiting dilution method is performed, and the hybridoma producing the target antibody is screened and single-cloned.
- a normal selective culture solution for example, a HAT culture solution (a culture solution containing hypoxanthine, aminopterin and thymidine). Culturing with the HAT culture solution is continued for a sufficient time (usually several days to several weeks) for cells other than the target hybridoma (non-fusion cells) to die. Subsequently, the usual limiting dilution method is performed, and the hybridoma producing the target antibody is screened
- human lymphocytes such as human lymphocytes infected with EB virus are sensitized in vitro with proteins, protein-expressing cells or lysates thereof. Lymphocytes can be fused with human-derived myeloma cells having permanent mitotic activity, for example, U266 (Registration No. TIB196) to obtain a hybridoma that produces a human antibody having a desired activity (for example, cell growth inhibitory activity).
- a desired activity for example, cell growth inhibitory activity
- the hybridoma producing the monoclonal antibody thus produced can be subcultured in a normal culture solution and can be stored for a long time in liquid nitrogen.
- a desired antigen or a cell expressing the desired antigen is used as a sensitizing antigen and immunized according to a normal immunization method, and the resulting immune cell is fused with a known parent cell by a normal cell fusion method. And can be prepared by screening monoclonal antibody-producing cells (hybridomas) by a normal screening method.
- a polyclonal antibody can be obtained, for example, as follows.
- This is prepared by, for example, purification using ammonium sulfate precipitation, protein A, protein G column, DEAE ion exchange chromatography, affinity column coupled with CAPRIN-1 protein or synthetic peptide, or the like.
- a rabbit polyclonal antibody against the CAPRIN-1 protein was produced, and the antitumor effect was confirmed.
- human antibody-producing mice for example, KM mice (Kirin Pharma / Medarex) and Xeno mice (Amgen) are known (for example, International Publication Nos. WO02 / 43478, WO02 / 092812, etc.).
- fully human polyclonal antibodies can be obtained from blood.
- spleen cells can be removed from the immunized mouse and a human monoclonal antibody can be prepared by a fusion method with myeloma cells.
- the antigen can be prepared according to, for example, a method using animal cells (Japanese Patent Publication No. 2007-530068), a method using baculovirus (eg, International Publication No. WO 98/46777).
- immunization may be performed by binding to an immunogenic macromolecule such as albumin.
- a recombinant antibody produced by cloning an antibody gene from a hybridoma, incorporating it into an appropriate vector, introducing it into a host, and producing it using a gene recombination technique (for example, Carl, AK Borrebaeck, James, W. Larrick, THERAPEUTIC MONOCLONAL, ANTIBODIES, Published in the United KingdomMIMILLAN PUBLISHERS 19).
- a gene recombination technique for example, Carl, AK Borrebaeck, James, W. Larrick, THERAPEUTIC MONOCLONAL, ANTIBODIES, Published in the United KingdomMIMILLAN PUBLISHERS 19.
- V region an antibody variable region
- DNA encoding the V region of the target antibody is obtained, it is ligated with DNA encoding the desired antibody constant region (C region) and incorporated into an expression vector.
- DNA encoding the V region of the antibody may be incorporated into an expression vector containing DNA of the antibody C region. It is incorporated into an expression vector so as to be expressed under the control of an expression control region such as an enhancer or promoter.
- host cells can be transformed with this expression vector to express the antibody.
- the anti-CAPRIN-1 antibody used in the present invention is preferably a monoclonal antibody. However, it may be a polyclonal antibody, a genetically modified antibody (such as a chimeric antibody or a humanized antibody) and the like.
- Monoclonal antibodies include human monoclonal antibodies, non-human animal monoclonal antibodies (eg, mouse monoclonal antibody, rat monoclonal antibody, rabbit monoclonal antibody, chicken monoclonal antibody, etc.). Monoclonal antibodies can be produced by culturing hybridomas obtained by fusion of spleen cells and myeloma cells from non-human mammals (eg, mice, human antibody-producing mice, etc.) immunized with CAPRIN-1 protein. In the examples described later, monoclonal antibodies were produced and the antitumor effect was confirmed.
- non-human animal monoclonal antibodies eg, mouse monoclonal antibody, rat monoclonal antibody, rabbit monoclonal antibody, chicken monoclonal antibody, etc.
- Monoclonal antibodies can be produced by culturing hybridomas obtained by fusion of spleen cells and myeloma cells from non-human mammals (eg, mice, human antibody-producing mice, etc.) immunized with CA
- SEQ ID NO: 40 SEQ ID NO: 50, SEQ ID NO: 60, SEQ ID NO: 70, SEQ ID NO: 80, SEQ ID NO: 90, SEQ ID NO: 100, SEQ ID NO: 110, SEQ ID NO: 120, SEQ ID NO: 130, SEQ ID NO: 135, Sequence number 145, Sequence number 160, Sequence number 170, Sequence number 200, Sequence number 210, Sequence number 220, Sequence number 230, Sequence number 240, Sequence number 250, Sequence number 279, Sequence number 294, Sequence number 304, Sequence number 314, SEQ ID NO: 324, SEQ ID NO: 334, SEQ ID NO: 344, SEQ ID NO: 359, SEQ ID NO: 363, SEQ ID NO: 368, SEQ ID NO: 372, SEQ ID NO: 376, SEQ ID NO: 386, SEQ ID NO: 396, SEQ ID NO: 401, SEQ ID NO: 411 or A heavy chain variable
- SEQ ID NO: 37 SEQ ID NO: 47, SEQ ID NO: 57, SEQ ID NO: 67, SEQ ID NO: 77, SEQ ID NO: 87, SEQ ID NO: 97, SEQ ID NO: 107, SEQ ID NO: 117, SEQ ID NO: 127, SEQ ID NO: 132 SEQ ID NO: 142, SEQ ID NO: 157, SEQ ID NO: 167, SEQ ID NO: 197, SEQ ID NO: 207, SEQ ID NO: 217, SEQ ID NO: 227, SEQ ID NO: 237, SEQ ID NO: 247, SEQ ID NO: 276, SEQ ID NO: 291, SEQ ID NO: 301, SEQ ID NO: CDR1 represented by the amino acid sequence of SEQ ID NO: 311, SEQ ID NO: 321, SEQ ID NO: 331, SEQ ID NO: 341, SEQ ID NO: 351, SEQ ID NO: 373,
- SEQ ID NO: 119 SEQ ID NO: 129, SEQ ID NO: 134, SEQ ID NO: 144, sequence No. 159, SEQ ID NO: 169, SEQ ID NO: 199, SEQ ID NO: 209, SEQ ID NO: 219, SEQ ID NO: 229, SEQ ID NO: 239, SEQ ID NO: 249, SEQ ID NO: 278, SEQ ID NO: 293, SEQ ID NO: 303, SEQ ID NO: 313, SEQ ID NO: 323 , SEQ ID NO: 333, SEQ ID NO: 343, SEQ ID NO: 353, SEQ ID NO: 357, SEQ ID NO: 375, SEQ ID NO: 385, SEQ ID NO: 395, SEQ ID NO: 400, SEQ ID NO: 410, and CDR3 represented by the amino acid sequence of SEQ ID NO: 420 are included.
- SEQ ID NO: 41 SEQ ID NO: 51, SEQ ID NO: 61, SEQ ID NO: 71, SEQ ID NO: 81, SEQ ID NO: 91, SEQ ID NO: 101, SEQ ID NO: 111, SEQ ID NO: 121, SEQ ID NO: 136, SEQ ID NO: 146, Sequence number 152, sequence number 161, sequence number 171, sequence number 177, sequence number 182, sequence number 187, SEQ ID NO: 192, SEQ ID NO: 201, SEQ ID NO: 211, SEQ ID NO: 221, SEQ ID NO: 231, SEQ ID NO: 241, SEQ ID NO: 251, SEQ ID NO: 280, SEQ ID NO: 286, SEQ ID NO: 295, SEQ ID NO: 305, SEQ ID NO: 315, CDR1 represented by the amino acid sequence of SEQ ID NO: 325, SEQ ID NO: 335, SEQ ID NO: 345, SEQ ID NO: 354, SEQ ID NO: 192, SEQ
- a chimeric antibody is an antibody produced by combining sequences derived from different animals, such as a mouse antibody heavy chain, light chain variable region and human antibody heavy chain, light chain constant region antibody, etc. .
- a chimeric antibody can be prepared using a known method. For example, a DNA encoding an antibody V region and a DNA encoding a human antibody C region are ligated, incorporated into an expression vector, and introduced into a host. It is obtained by producing.
- Polyclonal antibodies include antibodies obtained by immunizing human antibody-producing animals (eg, mice) with CAPRIN-1 protein.
- a humanized antibody is a modified antibody also called a reshaped human antibody.
- Humanized antibodies are constructed by transplanting CDRs of antibodies from immunized animals into the complementarity determining regions of human antibodies. The general gene recombination technique is also known.
- mouse antibody CDR and human antibody framework region are linked in the order of FR1-CDR1-FR2-CDR2-FR3-CDR3-FR4 from the N-terminal side.
- the DNA sequence designed to do so is synthesized by PCR from several oligonucleotides prepared so as to have overlapping portions at the ends.
- the obtained DNA is obtained by ligating with the DNA encoding the human antibody constant region, then incorporating it into an expression vector, introducing it into a host and producing it (European Patent Application Publication No. EP239400, International Publication No. WO96). No. 02576).
- a complementarity determining region that forms a favorable antigen binding site is selected. If necessary, the amino acid of 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 Research). 1993, 53: 851-856). Moreover, you may substitute by the framework area
- variable region e.g, FR
- constant region amino acids in the variable region or constant region may be substituted with other amino acids.
- Amino acid substitution is, for example, less than 15, less than 10, less than 8, less than 7, less than 6, less than 5, less than 4, less than 3, less than 2, or less than 2 amino acids, preferably 1 to 5 amino acids, more preferably 1 or 2 amino acids
- the substituted antibody should be functionally equivalent to the unsubstituted antibody.
- the substitution is preferably a conservative amino acid substitution, which is a substitution between amino acids with similar properties such as charge, side chain, polarity, aromaticity and the like.
- Amino acids with similar properties include, for example, basic amino acids (arginine, lysine, histidine), acidic amino acids (aspartic acid, glutamic acid), uncharged polar amino acids (glycine, asparagine, glutamine, serine, threonine, cysteine, tyrosine), nonpolar It can be classified into sex amino acids (leucine, isoleucine, alanine, valine, proline, phenylalanine, tryptophan, methionine), branched chain amino acids (leucine, valine, isoleucine), aromatic amino acids (phenylalanine, tyrosine, tryptophan, histidine).
- basic amino acids arginine, lysine, histidine
- acidic amino acids aspartic acid, glutamic acid
- uncharged polar amino acids glycine, asparagine, glutamine, serine, threonine, cysteine, tyrosine
- modified antibody examples include antibodies bound to various molecules such as polyethylene glycol (PEG).
- PEG polyethylene glycol
- the substance to be bound is not limited. In order to obtain such a modified antibody, it can be obtained by chemically modifying the obtained antibody. These methods are already established in this field.
- “functionally equivalent” means that the target antibody has the same biological or biochemical activity as the antibody used in the present invention, specifically, a function of damaging a tumor, to humans. This refers to the fact that rejection is not essentially caused at the time of application. Examples of such activity include cell growth inhibitory activity or binding activity.
- an antibody that recognizes the epitope of the CAPRIN-1 protein recognized by the anti-CAPRIN-1 antibody can be obtained by methods known to those skilled in the art.
- the epitope of the CAPRIN-1 protein recognized by the anti-CAPRIN-1 antibody is determined by an ordinary method (eg, epitope mapping), and an antibody is produced using a polypeptide having the amino acid sequence contained in the epitope as an immunogen.
- This method can be obtained by a method, a method of determining an epitope of an antibody prepared by a usual method, and selecting an antibody having the same epitope as the anti-CAPRIN-1 antibody.
- the affinity constant Ka (k on / k off ) of the antibody used in the present invention is preferably at least 10 7 M ⁇ 1 , at least 10 8 M ⁇ 1 , at least 5 ⁇ 10 8 M ⁇ 1 , at least 10 9 M ⁇ . 1 , at least 5 ⁇ 10 9 M ⁇ 1 , at least 10 10 M ⁇ 1 , at least 5 ⁇ 10 10 M ⁇ 1 , at least 10 11 M ⁇ 1 , at least 5 ⁇ 10 11 M ⁇ 1 , at least 10 12 M ⁇ 1 , Alternatively, at least 10 13 M ⁇ 1 .
- the antibody used in the present invention can be conjugated with an antitumor agent.
- the bond between the antibody and the antitumor agent is a group reactive with an amino group, carboxyl group, hydroxy group, thiol group, etc. (for example, succinate imidyl group, formyl group, 2-pyridyldithio group, maleimidyl group, alkoxycarbonyl group). , A hydroxy group, etc.).
- antitumor agents include the following antitumor agents known in the literature, such as paclitaxel, doxorubicin, daunorubicin, cyclophosphamide, methotrexate, 5-fluorouracil, thiotepa, busulfan, improsulfan, piperosulfan, benzodopa (benzodopa) ), Carbocone, methredopa, uredopa, uretopa, altreamine, triethylenemelamine, triethylenephosphoramide, triethylenethiophosphoramide, trimethylolothramine , Camptothecin, bryostatin, calistatin ( allystatin), cryptophycin 1, cryptophycin 8, dolastatin, duocarmycin, eleuterbin, panclastatin, sarcodictin, spongestatin, chlorambucil, chloronaphazine, cholophosphamide, estram Ifosfamide, mechlore
- a method for evaluating whether it exhibits antitumor activity is, for example, a mouse-derived anti-CAPRIN-1 antibody, which binds to a mouse antibody.
- the anti-tumor effect against human cancer cells can be evaluated in vitro by reacting the next antibody with a drug at the same time.
- evaluation can be performed using an anti-human IgG antibody antibody (Hum-ZAP (Advanced Targeting Systems)) to which Saporin is bound.
- a higher therapeutic effect can be obtained by co-administering the antibody used in the present invention and an antitumor agent.
- This technique can be applied to cancer patients expressing the CAPRIN-1 protein both before and after surgery. Particularly after surgery, cancer recurrence and longer survival can be obtained for cancers expressing the CAPRIN-1 protein that have been treated with an antitumor agent alone.
- antitumor agents used for combined administration include the above-mentioned antitumor agents known in the literature and the like, and pharmaceutically acceptable (known) salts or (known) derivatives thereof.
- cyclophosphamide, paclitaxel, doxetaxel, vinorelbine and the like are particularly preferably used.
- radioisotopes such as 211At, 131I, 125I, 90Y, 186Re, 188Re, 153SM, 212Bi, 32P, 175Lu, and 176Lu known in the literature can be bound to the antibody used in the present invention. is there. It is desirable that the radioisotope is effective for tumor treatment and diagnosis.
- the antibody used in the present invention is an antibody having immunological reactivity with the CAPRIN-1 protein, or an antibody that specifically binds to the CAPRIN-1 protein, and has cytotoxic activity against gallbladder cancer or tumor growth suppression It is an antibody that exhibits an action.
- the antibody should be an antibody having a structure such that little or no rejection is avoided in the subject animal to which it is administered. Examples of such antibodies include human antibodies, humanized antibodies, chimeric antibodies (eg, human-mouse chimeric antibodies), single chain antibodies, multispecific antibodies (eg, diabodies, triabodies, etc.) when the target animal is a human. ).
- the heavy and light chain variable regions are derived from human antibodies, or the heavy and light chain variable regions are derived from non-human animal antibody complementarity determining regions (CDR1, CDR2 and CDR3).
- CDR1, CDR2 and CDR3 non-human animal antibody complementarity determining regions
- a framework region derived from a human antibody, or the variable regions of the heavy and light chains are derived from a non-human animal antibody, and the constant regions of the heavy and light chains are human antibodies. It is a recombinant antibody that is derived from.
- Preferred antibodies are the previous two antibodies.
- DNA encoding an anti-human CAPRIN-1 monoclonal antibody eg, human monoclonal antibody, mouse monoclonal antibody, rat monoclonal antibody, rabbit monoclonal antibody, chicken monoclonal antibody
- DNA encoding the light chain variable region and heavy chain variable region of the antibody was prepared by RT-PCR method and the like, and Kabat EU numbering system (Kabat et al., Sequences of Proteins of Immunological Institute, 5th Ed. of Health, Bethesda, Md (1991)) to determine the sequence or sequences of the CDR1, CDR2, CDR3 of the variable region of the light and heavy chains based on.
- DNA encoding each of these variable regions or DNA encoding each CDR can be obtained using a gene recombination technique (Sambrook et al., Molecular Cloning A Laboratory Manual, Cold Spring Harbor Press (1989)) or a DNA synthesizer. Make it.
- the human monoclonal antibody-producing hybridoma is prepared by immunizing a human antibody-producing animal (for example, a mouse) with human CAPRIN-1 protein and then fusing spleen cells excised from the immunized animal with myeloma cells. be able to.
- DNA encoding the variable region and constant region of the light chain or heavy chain derived from a human antibody is prepared as necessary using a gene recombination technique or a DNA synthesizer.
- the CDR coding sequence in the DNA encoding the variable region of the light chain or heavy chain derived from the human antibody is derived from a non-human animal (for example, mouse, rat, chicken, etc.) corresponding thereto.
- a humanized antibody is encoded by preparing a DNA in which the CDR coding sequence of the antibody is substituted and ligating the DNA obtained thereby with a DNA encoding a constant region of a light chain or heavy chain derived from a human antibody, respectively. DNA can be produced.
- DNA encoding the light chain or heavy chain variable region of an antibody derived from a non-human animal is used, respectively.
- a DNA encoding a chimeric antibody can be prepared by linking with a DNA encoding a region.
- this antibody is an antibody in which a heavy chain variable region and a light chain variable region are linearly linked via a linker, DNA encoding the heavy chain variable region, DNA encoding the linker And a DNA encoding a light chain variable region can be combined to produce a DNA encoding a single chain antibody.
- each of the heavy chain variable region and the light chain variable region is derived from a human antibody, or only the CDR is replaced by the CDR of an antibody derived from a non-human animal (eg, mouse, rat, chicken, etc.). Derived from human antibodies.
- the linker is composed of 12 to 19 amino acids, and includes, for example, 15 amino acids (G 4 S) 3 (G.-B. Kim et al., Protein Engineering Design and Selection 2007, 20 (9): 425-432). .
- this antibody is an antibody that can specifically bind to two different epitopes, such as DNA encoding heavy chain variable region A, light chain variable region B.
- DNA, DNA encoding heavy chain variable region B, and DNA encoding light chain variable region A are joined in this order (however, DNA encoding light chain variable region B and DNA encoding heavy chain variable region B) Are linked via a DNA encoding a linker as described above), whereby a DNA encoding a bispecific antibody can be prepared.
- each of the heavy chain variable region and the light chain variable region is derived from a human antibody, or only the CDR is replaced by the CDR of an antibody derived from a non-human animal (eg, mouse, rat, chicken, etc.). Derived from human antibodies.
- Recombinant DNA produced as described above is incorporated into one or more appropriate vectors, introduced into host cells (eg, mammalian cells, yeast cells, insect cells, etc.), and (co) expressed
- host cells eg, mammalian cells, yeast cells, insect cells, etc.
- a recombinant antibody can be prepared (PJ Delves., ANTIBODY PRODUCTION ESSENTIAL TECHNIQUES., 1997 WILEY, P. Shepherd and C. Dean. SNT. W. Gododing., Monoclonal Antibodies: principals and practices., 1993 ACADEMI PRESS).
- Examples of the antibody of the present invention produced by the above method include the following antibodies (a) to (ao).
- A a heavy chain variable region comprising complementarity determining regions (CDR1, CDR2, CDR3, respectively) consisting of the amino acid sequences represented by SEQ ID NOs: 37, 38 and 39, and amino acid sequences represented by SEQ ID NOs: 41, 42 and 43
- An antibody according to WO2011 / 096528 (for example, the heavy chain variable region of SEQ ID NO: 40 and the light chain variable region of SEQ ID NO: 44), comprising a light chain variable region comprising a complementarity determining region (CDR1, CDR2, CDR3, respectively) consisting of Antibody composed of regions).
- An antibody described in WO2011 / 096519 for example, the heavy chain variable region of SEQ ID NO: 50 and the light chain variable of SEQ ID NO: 54, comprising a light chain variable region comprising a complementarity determining region (CDR1, CDR2, CDR3, respectively) consisting of Antibody composed of regions).
- C a heavy chain variable region comprising complementarity determining regions (CDR1, CDR2, CDR3, respectively) consisting of the amino acid sequences represented by SEQ ID NOs: 57, 58 and 59, and amino acid sequences represented by SEQ ID NOs: 61, 62 and 63
- An antibody described in WO2011 / 096517 for example, the heavy chain variable region of SEQ ID NO: 60 and the light chain variable region of SEQ ID NO: 64, each comprising a light chain variable region comprising a complementarity determining region (CDR1, CDR2, CDR3, respectively) consisting of Antibody composed of regions).
- An antibody described in WO2011 / 096528 for example, the heavy chain variable region of SEQ ID NO: 70 and the light chain variable region of SEQ ID NO: 74, comprising a light chain variable region comprising a complementarity determining region consisting of CDR1, CDR2, and CDR3, respectively.
- An antibody according to WO2011 / 096528 (for example, the heavy chain variable region of SEQ ID NO: 80 and the light chain variable region of SEQ ID NO: 84), comprising a light chain variable region comprising a complementarity determining region (CDR1, CDR2, CDR3, respectively) consisting of Antibody composed of regions).
- the heavy chain variable region comprising the complementarity determining regions (CDR1, CDR2, CDR3, respectively) consisting of the amino acid sequences represented by SEQ ID NOs: 87, 88, and 89, and the amino acid sequences represented by SEQ ID NOs: 91, 92, and 93
- An antibody described in WO2011 / 096528 for example, the heavy chain variable region of SEQ ID NO: 90 and the light chain variable region of SEQ ID NO: 94), comprising a light chain variable region comprising a complementarity determining region (CDR1, CDR2, CDR3, respectively) Antibody composed of regions).
- a heavy chain variable region comprising a complementarity determining region (CDR1, CDR2, CDR3, respectively) consisting of the amino acid sequences represented by SEQ ID NOs: 97, 98, and 99 and the amino acid sequences represented by SEQ ID NOs: 101, 102, and 103
- An antibody according to WO2011 / 096528 (for example, the heavy chain variable region of SEQ ID NO: 100 and the light chain variable of SEQ ID NO: 104), comprising a light chain variable region comprising a complementarity determining region (CDR1, CDR2, CDR3, respectively) consisting of Antibody composed of regions).
- (H) a heavy chain variable region comprising complementarity determining regions (CDR1, CDR2, CDR3, respectively) consisting of the amino acid sequences represented by SEQ ID NOs: 107, 108 and 109, and amino acid sequences represented by SEQ ID NOs: 111, 112 and 113
- An antibody according to WO2011 / 096528 for example, the heavy chain variable region of SEQ ID NO: 110 and the light chain variable of SEQ ID NO: 114, comprising a light chain variable region comprising a complementarity determining region (CDR1, CDR2, CDR3, respectively) consisting of Antibody composed of regions).
- a heavy chain variable region comprising complementarity determining regions (CDR1, CDR2, CDR3, respectively) consisting of the amino acid sequences represented by SEQ ID NOs: 117, 118, and 119, and amino acid sequences represented by SEQ ID NOs: 121, 122, and 123
- An antibody described in WO2011 / 096553 for example, the heavy chain variable region of SEQ ID NO: 120 and the light chain variable region of SEQ ID NO: 124), comprising a light chain variable region comprising a complementarity determining region (CDR1, CDR2, CDR3, respectively) consisting of Antibody composed of regions).
- a heavy chain variable region comprising complementarity determining regions (CDR1, CDR2, CDR3, respectively) consisting of the amino acid sequences represented by SEQ ID NOs: 127, 128, and 129, and amino acid sequences represented by SEQ ID NOs: 121, 122, and 123
- An antibody according to WO2011 / 096533 (for example, the heavy chain variable region of SEQ ID NO: 130 and the light chain variable region of SEQ ID NO: 124), comprising a light chain variable region comprising a complementarity determining region (CDR1, CDR2, CDR3, respectively) consisting of Antibody composed of regions).
- An antibody described in WO2011 / 096533 (for example, the heavy chain variable region of SEQ ID NO: 135 and the light chain variable of SEQ ID NO: 139), comprising a light chain variable region comprising a complementarity determining region (CDR1, CDR2, CDR3, respectively) consisting of Antibody composed of regions).
- (L) a heavy chain variable region comprising complementarity determining regions (CDR1, CDR2, CDR3, respectively) consisting of the amino acid sequences represented by SEQ ID NOs: 142, 143, and 144;
- An antibody according to WO2011 / 096534 for example, the heavy chain variable region of SEQ ID NO: 145 and the light chain variable of SEQ ID NO: 149, comprising a light chain variable region comprising a complementarity determining region (CDR1, CDR2, CDR3, respectively) Antibody composed of regions).
- (M) a heavy chain variable region comprising complementarity determining regions (CDR1, CDR2, CDR3, respectively) consisting of the amino acid sequences represented by SEQ ID NOs: 142, 143, and 144, and amino acid sequences represented by SEQ ID NOs: 152, 153, and 154
- CDR1, CDR2, CDR3, respectively complementarity determining regions
- SEQ ID NOs: 142, 143, and 144 amino acid sequences represented by SEQ ID NOs: 152, 153, and 154
- An antibody described in WO2011 / 096534 for example, the heavy chain variable region of SEQ ID NO: 145 and the light chain variable region of SEQ ID NO: 155, comprising Antibody composed of regions).
- the heavy chain variable region comprising the complementarity determining regions (CDR1, CDR2, CDR3, respectively) consisting of the amino acid sequences represented by SEQ ID NOs: 167, 168, and 169, and the amino acid sequences represented by SEQ ID NOs: 171, 172, and 173
- An antibody according to WO2011 / 096534 (for example, the heavy chain variable region of SEQ ID NO: 170 and the light chain variable region of SEQ ID NO: 174), comprising a light chain variable region comprising a complementarity determining region (CDR1, CDR2, CDR3, respectively) consisting of Antibody composed of regions).
- (P) a heavy chain variable region comprising complementarity determining regions (CDR1, CDR2, CDR3, respectively) consisting of the amino acid sequences represented by SEQ ID NOs: 167, 168, and 169, and the amino acid sequences represented by SEQ ID NOs: 177, 178, and 179
- An antibody according to WO 2010/016526 (for example, the heavy chain variable region of SEQ ID NO: 170 and the light chain variable of SEQ ID NO: 180), comprising a light chain variable region comprising a complementarity determining region (CDR1, CDR2, CDR3, respectively) consisting of Antibody composed of regions).
- the heavy chain variable region comprising the complementarity determining regions (CDR1, CDR2, CDR3, respectively) consisting of the amino acid sequences represented by SEQ ID NOs: 167, 168, and 169, and the amino acid sequences represented by SEQ ID NOs: 182, 183, and 184
- An antibody according to WO 2010/016526 for example, the heavy chain variable region of SEQ ID NO: 170 and the light chain variable of SEQ ID NO: 185, comprising a light chain variable region comprising a complementarity determining region (CDR1, CDR2, CDR3, respectively) consisting of Antibody composed of regions).
- (R) a heavy chain variable region comprising complementarity determining regions (CDR1, CDR2, CDR3, respectively) consisting of the amino acid sequences represented by SEQ ID NOs: 167, 168, and 169, and the amino acid sequences represented by SEQ ID NOs: 187, 188, and 189
- An antibody according to WO 2010/016526 for example, the heavy chain variable region of SEQ ID NO: 170 and the light chain variable of SEQ ID NO: 190, each comprising a light chain variable region comprising a complementarity determining region (CDR1, CDR2, CDR3, respectively) consisting of Antibody composed of regions).
- (S) a heavy chain variable region comprising complementarity determining regions (CDR1, CDR2, CDR3, respectively) consisting of the amino acid sequences represented by SEQ ID NOs: 167, 168, and 169, and the amino acid sequences represented by SEQ ID NOs: 192, 193, and 194
- An antibody according to WO 2010/016526 (for example, the heavy chain variable region of SEQ ID NO: 170 and the light chain variable of SEQ ID NO: 195), comprising a light chain variable region comprising a complementarity determining region (CDR1, CDR2, CDR3, respectively) consisting of Antibody composed of regions).
- T the heavy chain variable region comprising the complementarity determining regions (CDR1, CDR2, CDR3, respectively) consisting of the amino acid sequences represented by SEQ ID NOs: 197, 198, and 199; and the amino acid sequences represented by SEQ ID NOs: 201, 202, and 203
- An antibody according to WO 2010/016526 for example, the heavy chain variable region of SEQ ID NO: 200 and the light chain variable of SEQ ID NO: 204, comprising a light chain variable region comprising a complementarity determining region (CDR1, CDR2, CDR3, respectively) consisting of Antibody composed of regions).
- An antibody according to WO 2010/016526 for example, the heavy chain variable region of SEQ ID NO: 210 and the light chain variable of SEQ ID NO: 214), comprising a light chain variable region comprising a complementarity determining region (CDR1, CDR2, CDR3, respectively) Antibody composed of regions).
- V the heavy chain variable region comprising the complementarity determining regions (CDR1, CDR2, CDR3, respectively) consisting of the amino acid sequences represented by SEQ ID NOs: 217, 218, and 219 and the amino acid sequences represented by SEQ ID NOs: 221, 222, and 223
- An antibody according to WO 2010/016526 for example, the heavy chain variable region of SEQ ID NO: 220 and the light chain variable of SEQ ID NO: 224, comprising a light chain variable region comprising a complementarity determining region (CDR1, CDR2, CDR3, respectively) consisting of Antibody composed of regions).
- a heavy chain variable region comprising complementarity determining regions (CDR1, CDR2, CDR3, respectively) consisting of the amino acid sequences represented by SEQ ID NOs: 227, 228, and 229, and amino acid sequences represented by SEQ ID NOs: 231, 232, and 233
- An antibody according to WO 2010/016526 eg, the heavy chain variable region of SEQ ID NO: 230 and the light chain variable of SEQ ID NO: 234), comprising a light chain variable region comprising a complementarity determining region (CDR1, CDR2, CDR3, respectively) consisting of Antibody composed of regions).
- (X) the heavy chain variable region comprising the complementarity determining regions (CDR1, CDR2, CDR3, respectively) consisting of the amino acid sequences represented by SEQ ID NOs: 237, 238 and 239, and the amino acid sequences represented by SEQ ID NOs: 241, 242, and 243
- An antibody according to WO 2010/016526 for example, the heavy chain variable region of SEQ ID NO: 240 and the light chain variable of SEQ ID NO: 244), comprising a light chain variable region comprising a complementarity determining region (CDR1, CDR2, CDR3, respectively) consisting of Antibody composed of regions).
- Y a heavy chain variable region comprising a complementarity determining region (CDR1, CDR2, CDR3) consisting of the amino acid sequences represented by SEQ ID NOs: 247, 248 and 249 and the amino acid sequences represented by SEQ ID NOs: 251, 252 and 253, respectively.
- An antibody according to WO 2010/016526 for example, the heavy chain variable region of SEQ ID NO: 250 and the light chain variable region of SEQ ID NO: 254), comprising a light chain variable region comprising a complementarity determining region (CDR1, CDR2, CDR3, respectively) consisting of Antibody composed of regions).
- (Z) a heavy chain variable region comprising complementarity determining regions (CDR1, CDR2, CDR3, respectively) consisting of the amino acid sequences represented by SEQ ID NOs: 276, 277 and 278, and the amino acid sequences represented by SEQ ID NOs: 280, 281 and 282
- An antibody described in WO2013 / 018894 (for example, an antibody composed of a heavy chain variable region of SEQ ID NO: 279 and a light chain variable region of SEQ ID NO: 283) comprising a complementarity-determining region comprising CDR1 (CDR1, CDR2 and CDR3, respectively) .
- a heavy chain variable region comprising complementarity determining regions (CDR1, CDR2, CDR3, respectively) consisting of the amino acid sequences represented by SEQ ID NOs: 276, 277 and 278, and the amino acid sequences represented by SEQ ID NOs: 286, 287 and 288
- An antibody described in WO2013 / 018894 (for example, an antibody composed of a heavy chain variable region of SEQ ID NO: 279 and a light chain variable region of SEQ ID NO: 289) comprising a complementarity-determining region comprising CDR1 (CDR1, CDR2 and CDR3, respectively) .
- An antibody according to WO 2013/018894 (for example, the heavy chain variable region of SEQ ID NO: 294 and the light chain variable of SEQ ID NO: 298), comprising a light chain variable region comprising a complementarity determining region (CDR1, CDR2, CDR3, respectively) consisting of Antibody composed of regions).
- a heavy chain variable region comprising a complementarity determining region (CDR1, CDR2, CDR3, respectively) consisting of the amino acid sequences represented by SEQ ID NOs: 301, 302 and 303 and the amino acid sequence represented by SEQ ID NOs: 305, 306 and 307
- a light chain variable region comprising a complementarity determining region (CDR1, CDR2, CDR3, respectively) consisting of the antibodies described in WO2013 / 018882 (for example, the heavy chain variable region of SEQ ID NO: 304 and the light chain variable region of SEQ ID NO: 308) Antibody composed of regions).
- a heavy chain variable region comprising complementarity determining regions (CDR1, CDR2, CDR3, respectively) consisting of the amino acid sequences represented by SEQ ID NOs: 311, 312 and 313, and amino acid sequences represented by SEQ ID NOs: 315, 316 and 317
- An antibody described in WO2013 / 018891 for example, the heavy chain variable region of SEQ ID NO: 314 and the light chain variable region of SEQ ID NO: 318), comprising a light chain variable region comprising a complementarity determining region comprising CDR1, CDR2, and CDR3, respectively.
- a heavy chain variable region comprising complementarity determining regions (CDR1, CDR2, CDR3, respectively) consisting of amino acid sequences represented by SEQ ID NOs: 321, 322, and 323, and amino acid sequences represented by SEQ ID NOs: 325, 326, and 327
- An antibody described in WO2013 / 018889 for example, the heavy chain variable region of SEQ ID NO: 324 and the light chain variable of SEQ ID NO: 328), comprising a light chain variable region comprising a complementarity determining region (CDR1, CDR2, CDR3, respectively) consisting of Antibody composed of regions).
- a heavy chain variable region comprising complementarity determining regions (CDR1, CDR2, CDR3, respectively) consisting of the amino acid sequences represented by SEQ ID NOs: 331, 332, and 333 and amino acid sequences represented by SEQ ID NOs: 335, 336, and 337
- An antibody described in WO2013 / 018883 for example, the heavy chain variable region of SEQ ID NO: 334 and the light chain variable of SEQ ID NO: 338, each comprising a light chain variable region comprising a complementarity determining region (CDR1, CDR2, CDR3, respectively) consisting of Antibody composed of regions).
- a heavy chain variable region comprising complementarity determining regions (CDR1, CDR2, CDR3, respectively) consisting of the amino acid sequences represented by SEQ ID NOs: 341, 342, and 343, and an amino acid sequence represented by SEQ ID NOs: 345, 346, and 347
- a fragment thereof for example, a heavy chain variable region of SEQ ID NO: 344 and a light chain variable region of SEQ ID NO: 348, comprising a light chain variable region comprising the complementarity determining regions (CDR1, CDR2, CDR3, respectively) consisting of Antibody).
- a heavy chain variable region comprising complementarity determining regions (CDR1, CDR2, CDR3, respectively) consisting of the amino acid sequences represented by SEQ ID NOs: 351, 352, and 353 and amino acid sequences represented by SEQ ID NOs: 354, 355, and 356
- a fragment thereof for example, a heavy chain variable region of SEQ ID NO: 359 and a light chain variable region of SEQ ID NO: 361 comprising a light chain variable region comprising complementarity determining regions (CDR1, CDR2, CDR3, respectively) consisting of An antibody composed of a heavy chain variable region of SEQ ID NO: 368 and a light chain variable region of SEQ ID NO: 370, an antibody composed of a heavy chain variable region of SEQ ID NO: 372 and a light chain variable region of SEQ ID NO: 370).
- a heavy chain variable region comprising complementarity determining regions (CDR1, CDR2, CDR3, respectively) consisting of the amino acid sequences represented by SEQ ID NOs: 351, 352, and 357, and an amino acid sequence represented by SEQ ID NOs: 354, 355, and 356 And a fragment thereof (for example, a heavy chain variable region of SEQ ID NO: 363 and a light chain variable region of SEQ ID NO: 365) comprising a light chain variable region comprising a complementarity determining region (CDR1, CDR2, CDR3, respectively) consisting of Antibody).
- CDR1, CDR2, CDR3, respectively complementarity determining regions consisting of Antibody
- An antibody comprising a light chain variable region comprising complementarity determining regions (CDR1, CDR2, CDR3, respectively) or a fragment thereof for example, an antibody comprising a heavy chain variable region of SEQ ID NO: 376 and a light chain variable region of SEQ ID NO: 380) ).
- (Ak) the heavy chain variable region containing the complementarity determining regions (CDR1, CDR2, CDR3) of the amino acid sequences represented by SEQ ID NOs: 383, 384, and 385 and the amino acid sequences represented by SEQ ID NOs: 387, 388, and 389, respectively.
- (Al) a heavy chain variable region comprising the complementarity determining regions (CDR1, CDR2, CDR3) of the amino acid sequences represented by SEQ ID NOs: 393, 394 and 395 and the amino acid sequences represented by SEQ ID NOs: 387, 388 and 389, respectively.
- An antibody comprising a light chain variable region comprising complementarity determining regions (CDR1, CDR2, CDR3, respectively) or a fragment thereof (for example, an antibody comprising a heavy chain variable region of SEQ ID NO: 396 and a light chain variable region of SEQ ID NO: 390) ).
- a heavy chain variable region comprising a complementarity determining region (CDR1, CDR2, CDR3, respectively) consisting of the amino acid sequences represented by SEQ ID NOs: 398, 399 and 400, and the amino acid sequences represented by SEQ ID NOs: 402, 403 and 404
- An antibody or fragment thereof (for example, a heavy chain variable region of SEQ ID NO: 401 and a light chain variable region of SEQ ID NO: 405) comprising a light chain variable region comprising complementarity determining regions (CDR1, CDR2, CDR3, respectively) consisting of Antibody).
- the heavy chain variable region including the complementarity determining regions of SEQ ID NOs: 408, 409, and 410 (CDR1, CDR2, CDR3, respectively) and the complementarity determining regions of SEQ ID NOs: 412, 413, and 414 (CDR1, CDR2, CDR3, respectively)
- a fragment thereof for example, an antibody composed of the heavy chain variable region of SEQ ID NO: 411 and the light chain variable region of SEQ ID NO: 415).
- the heavy chain variable region comprising the complementarity determining regions of SEQ ID NOs: 418, 419 and 420 (CDR1, CDR2, CDR3, respectively) and the complementarity determining regions of SEQ ID NOS: 422, 423 and 424 (CDR1, CDR2, CDR3, respectively) And a fragment thereof (for example, an antibody composed of the heavy chain variable region of SEQ ID NO: 421 and the light chain variable region of SEQ ID NO: 425).
- amino acid sequences shown in SEQ ID NOs: 37, 38 and 39, SEQ ID NOs: 47, 48 and 49, SEQ ID NOs: 57, 58 and 59 are CDR1, CDR2 and CDR3 of chicken antibody heavy chain variable region.
- amino acid sequences shown in Nos. 41, 42 and 43, SEQ ID Nos. 51, 52 and 53 and SEQ ID Nos. 61, 62 and 63 are the CDR1, CDR2 and CDR3 of the chicken antibody light chain variable region, respectively.
- amino acid sequences shown in SEQ ID NOs: 351, 352, and 353 are the CDR1, CDR2, and CDR3 of the rabbit antibody heavy chain variable region. CDR1, CDR2 and CDR3 of the chain variable region.
- humanized antibody, chimeric antibody, single chain antibody or multispecific antibody used in the present invention is, for example, the following antibody (exemplified by antibody (ah)).
- variable region of the heavy chain includes the amino acid sequence of SEQ ID NOs: 351, 352, and 353 and the amino acid sequence of the framework region derived from a human antibody
- variable region of the light chain includes the amino acids of SEQ ID NOs: 354, 355, and 356
- An antibody comprising a sequence and an amino acid sequence of a framework region derived from a human antibody.
- variable region of the heavy chain comprises the amino acid sequence of SEQ ID NOs: 351, 352 and 353 and the amino acid sequence of the framework region derived from a human antibody
- constant region of the heavy chain comprises the amino acid sequence derived from a human antibody
- light chain variable region comprises the amino acid sequences of SEQ ID NOs: 354, 355 and 356 and the amino acid sequence of the framework region derived from a human antibody
- the light chain constant region comprises the amino acid sequence derived from a human antibody. antibody.
- variable region of the heavy chain comprises the amino acid sequence of SEQ ID NO: 368
- constant region of the heavy chain comprises the amino acid sequence derived from a human antibody
- variable region of the light chain comprises the amino acid sequence of SEQ ID NO: 370.
- An antibody comprising a light chain constant region comprising an amino acid sequence derived from a human antibody.
- the constant regions and variable region sequences of human antibody heavy and light chains are available, for example, from NCBI (US: GenBank, UniGene, etc.).
- NCBI GenBank, UniGene, etc.
- human IgG 1 heavy chain constant region registration number J00228, human registration for IgG 2 heavy chain constant region numbers J00230, registration for the human IgG 3 heavy chain constant region number X03604, registration for the human IgG 4 heavy chain constant region number K01316, registration for the human light chain ⁇ constant region numbers V00557
- humanized antibody of the antibody (ah) include the antibody (ai), an antibody comprising the heavy chain variable region of SEQ ID NO: 368 and the light chain variable region of SEQ ID NO: 370 of the heavy chain variable region, An antibody comprising the heavy chain variable region of SEQ ID NO: 372 and the light chain variable region of SEQ ID NO: 370.
- the above antibody preferably has cytotoxic activity, and can thereby exert an antitumor effect.
- a hybridoma capable of producing another human antibody or non-human animal antibody (eg, mouse antibody) against human CAPRIN-1 protein is prepared, and the monoclonal antibody produced by the hybridoma is recovered and immunologically bound to human CAPRIN-1 protein. Whether the antibody is the target antibody is determined by using sex and cytotoxic activity as an index. After identifying the target monoclonal antibody-producing hybridoma, DNAs encoding the variable regions of the heavy and light chains of the target antibody were prepared from the hybridoma and sequenced as described above. Use for production.
- each antibody of (i) to (iv) above particularly the framework region
- 1 or several (preferably 1 or 2) amino acid substitutions, deletions or additions may be present.
- the anti-tumor effect of the anti-CAPRIN-1 antibody used in the present invention on CAPRIN-1 protein-expressing gallbladder cancer cells is considered to occur by the following mechanism.
- ADCC Effector cell antibody-dependent cytotoxicity
- CDC complement-dependent cytotoxicity
- the activity of the anti-CAPRIN-1 antibody used in the present invention is evaluated by the above-mentioned ADCC activity or CDC against gallbladder cancer cells expressing the CAPRIN-1 protein in vitro, as specifically shown in the Examples below. It can be evaluated by measuring the activity.
- the anti-CAPRIN-1 antibody used in the present invention binds to the CAPRIN-1 protein on gallbladder cancer cells and exhibits an antitumor action due to the above-described activity. Therefore, it is considered useful for the treatment or prevention of gallbladder cancer. . That is, the present invention provides a pharmaceutical composition for treating and / or preventing gallbladder cancer comprising an anti-CAPRIN-1 antibody as an active ingredient.
- the anti-CAPRIN-1 antibody is used for the purpose of administering it to the human body (antibody treatment), it is preferable to use a human antibody or a humanized antibody in order to reduce immunogenicity.
- the binding constant (affinity constant) Ka (k on / k off ) is preferably at least 10 7 M ⁇ 1 , at least 10 8 M ⁇ 1 , at least 5 ⁇ 10 8 M as the high binding affinity.
- ⁇ Binding to antigen-expressing cells The ability of an antibody to bind to a CAPRIN-1 protein can be identified using binding assays such as those described in the Examples, such as ELISA, Western blotting, immunofluorescence and flow cytometry analysis.
- Antibodies that recognize the CAPRIN-1 protein can be obtained from tissues obtained from patients during surgery by immunohistochemistry in a manner well known to those skilled in the art, or cell lines that express the CAPRIN-1 protein either naturally or after transfection Reactivity with CAPRIN-1 protein from tissues obtained from animals bearing xenografts inoculated with paraformaldehyde or acetone-fixed frozen sections or paraformaldehyde-embedded tissue sections Can be tested.
- antibodies reactive to the CAPRIN-1 protein can be stained by various methods. For example, it can be visualized by reacting horseradish peroxidase-conjugated goat anti-mouse antibody or goat anti-rabbit antibody.
- the target of the pharmaceutical composition for the treatment and / or prevention of gallbladder cancer of the present invention is not particularly limited as long as it is a gallbladder cancer (cell) expressing the CAPRIN-1 gene.
- tumor and cancer refer to malignant neoplasms and are used interchangeably.
- the gallbladder cancer to be used in the present invention is an amino acid sequence having an even sequence number among SEQ ID NOs: 2 to 30, the amino acid sequence and 80% or more, preferably 90% or more, more preferably 95% or more, and still more preferably In gallbladder cancer expressing a gene encoding an amino acid sequence having a sequence identity of 97% or more, or a partial sequence thereof containing 7 or more, preferably 8 or more consecutive amino acid residues in these amino acid sequences is there.
- Gallbladder cancer includes, but is not limited to, cancer that originates in the gallbladder site (primary) and metastasized cancer.
- the target animals are mammals, for example, mammals including primates, pet animals, domestic animals, sport animals, etc., and humans, dogs and cats are particularly preferable.
- the antibody used in the present invention when used as a pharmaceutical composition, it can be formulated by methods known to those skilled in the art. For example, it can be used parenterally in the form of a sterile solution with water or other pharmaceutically acceptable liquid, or an injection of suspension.
- a pharmacologically acceptable carrier or medium specifically, sterile water or physiological saline, vegetable oil, emulsifier, suspension, surfactant, stabilizer, flavoring agent, excipient, vehicle, preservative
- a pharmaceutical preparation by combining with a binder or the like as appropriate and mixing in a unit dosage form generally required for pharmaceutical practice. The amount of active ingredient in these preparations is such that an appropriate dose within the indicated range can be obtained.
- a sterile composition for injection can be formulated in accordance with normal pharmaceutical practice using a vehicle such as distilled water for injection.
- Aqueous solutions for injection include, for example, isotonic solutions containing physiological saline, glucose and other adjuvants such as D-sorbitol, D-mannose, D-mannitol and sodium chloride.
- Suitable solubilizers such as Alcohols, specifically ethanol, polyalcohols such as propylene glycol, polyethylene glycol, nonionic surfactants such as polysorbate 80 (TM), HCO-60 may be used in combination.
- oily liquid examples include sesame oil and soybean oil, which may be used in combination with benzyl benzoate or benzyl alcohol as a solubilizing agent.
- oily liquid examples include sesame oil and soybean oil, which may be used in combination with benzyl benzoate or benzyl alcohol as a solubilizing agent.
- buffer for example, phosphate buffer, sodium acetate buffer, a soothing agent, for example, procaine hydrochloride, stabilizer, for example, benzyl alcohol, phenol, antioxidant.
- the prepared injection solution is usually filled into a suitable ampoule.
- Administration is oral or parenteral, preferably parenteral administration, and specific examples include injection, nasal administration, pulmonary administration, and transdermal administration.
- injection form it can be administered systemically or locally by, for example, intravenous injection, intramuscular injection, intraperitoneal injection, subcutaneous injection, or the like.
- the administration method can be appropriately selected depending on the age, weight, sex, symptoms, etc. of the patient.
- the dosage of the pharmaceutical composition containing the antibody or the polynucleotide encoding the antibody can be selected, for example, in the range of 0.0001 mg to 1000 mg per kg body weight. Alternatively, for example, the dose can be selected in the range of 0.001 to 100,000 mg / body per patient, but is not necessarily limited to these values.
- the dose and administration method vary depending on the weight, age, sex, symptoms, etc. of the patient, but can be appropriately selected by those skilled in the art.
- the gallbladder cancer can be treated and / or prevented by administering the pharmaceutical composition of the present invention to a subject.
- a method for treating and / or preventing gallbladder cancer comprising administering the pharmaceutical composition of the present invention to a subject in combination with an antitumor agent or a pharmaceutical composition containing an antitumor agent as exemplified above.
- the antibody or fragment thereof of the present invention and the antitumor agent can be administered to a subject simultaneously or separately.
- any pharmaceutical composition may be earlier or later, and the administration interval, dosage, administration route and frequency of administration can be appropriately selected by a specialist.
- Another pharmaceutical dosage form to be administered at the same time includes, for example, a pharmaceutical composition obtained by mixing the antibody of the present invention or a fragment thereof and an antitumor agent in a pharmacologically acceptable carrier (or medium) and formulating it. Shall be included. Further, for any of the above pharmaceutical compositions and dosage forms containing an antitumor agent, the formulation, formulation, administration route, dose, cancer, etc. for the pharmaceutical composition and dosage form containing the antibody of the present invention The explanation can be applied. Therefore, the present invention relates to a combination pharmaceutical (“pharmaceutical kit”) for treating and / or preventing gallbladder cancer, comprising the pharmaceutical composition of the present invention and a pharmaceutical composition comprising an antitumor agent as exemplified above. (Also called).
- a combination pharmaceutical for treating and / or preventing gallbladder cancer
- the present invention also provides a pharmaceutical composition for treating and / or preventing gallbladder cancer comprising the antibody of the present invention or a fragment thereof and an antitumor agent together with a pharmacologically acceptable carrier.
- the antitumor agent may be conjugated to the antibody of the present invention or a fragment thereof. Similar to the above, the conjugate can be mixed with a pharmacologically acceptable carrier (or medium) to prepare a pharmaceutical composition.
- Example 1 Identification of cancer antigen protein by SEREX method (1) Preparation of cDNA library Total RNA was extracted from testicular tissue of a healthy dog by acid guanidinium-phenol-chloroform method (Acid guanidinium-Phenol-Chloroform method). PolyA RNA was purified using Oligotex-dT30 mRNA purification Kit (Takara Shuzo) according to the protocol attached to the kit.
- a dog testis cDNA phage library was synthesized using the obtained mRNA (5 ⁇ g).
- the cDNA phage library was prepared using cDNA Synthesis Kit, ZAP-cDNA Synthesis Kit, ZAP-cDNA GigapackIII Gold Clonig Kit (manufactured by STRATAGENE) according to the protocol attached to the kit.
- the size of the prepared cDNA phage library was 7.73 ⁇ 10 5 pfu / ml.
- the membrane was recovered, immersed in TBS (10 mM Tris-HCl, 150 mM NaCl pH 7.5) containing 0.5% nonfat dry milk, and shaken at 4 ° C. overnight to suppress nonspecific reaction.
- TBS 10 mM Tris-HCl, 150 mM NaCl pH 7.5
- This filter was reacted with serum of a patient dog diluted 500 times at room temperature for 2 to 3 hours.
- the serum pretreatment method is as follows. Specifically, ⁇ ZAP Express phage into which no foreign gene was inserted was infected with host E. coli (XL1-Blue MRF ′), and then cultured overnight at 37 ° C. on NZY plate medium. Next, a buffer of 0.2 M NaHCO 3 pH 8.3 containing 0.5 M NaCl was added to the plate and allowed to stand at 4 ° C. for 15 hours, and then the supernatant was recovered as an E. coli / phage extract. Next, the recovered E.
- coli / phage extract was passed through an NHS-column (GE Healthcare Bio-Science) to immobilize the protein derived from E. coli / phage.
- Serum dog serum was passed through and reacted with this protein-immobilized column, and antibodies adsorbed to E. coli and phage were removed from the serum.
- the serum fraction passed through the column was diluted 500 times with TBS containing 0.5% nonfat dry milk, and this was used as an immunoscreening material.
- phagemid host Escherichia coli prepared to have an absorbance OD600 of 1.0 and 10 ⁇ l of purified phage solution were mixed and reacted at 37 ° C. for 15 minutes, and 50 ⁇ l was ampicillin (final concentration 50 ⁇ g / ml).
- the purified plasmid was analyzed for the full-length insert sequence by the primer walking method using the T3 primer shown in SEQ ID NO: 31 and the T7 primer shown in SEQ ID NO: 32.
- the gene sequences described in SEQ ID NOs: 5, 7, 9, 11, and 13 were obtained by this sequence analysis.
- the homology search program BLAST search http://www.ncbi.nlm.nih.gov/BLAST/
- BLAST search http://www.ncbi.nlm.nih.gov/BLAST/
- sequence identity between the five genes was 100% nucleotide sequence and 99% amino acid sequence in the region translated into protein.
- sequence identity of this gene with the gene encoding the human homologous factor was 94% for the nucleotide sequence and 98% for the amino acid sequence in the region translated into protein.
- the base sequences of human homologous factors are shown in SEQ ID NOs: 1 and 3, and amino acid sequences are shown in SEQ ID NOs: 2 and 4.
- sequence identity of the obtained canine gene with the gene encoding the bovine homologous factor was 94% for the nucleotide sequence and 97% for the amino acid sequence in the region translated into protein.
- the base sequence of the bovine homologous factor is shown in SEQ ID NO: 15, and the amino acid sequence is shown in SEQ ID NO: 16.
- the sequence identity between the gene encoding the human homologous factor and the gene encoding the bovine homologous factor was 94% in the base sequence and 93-97% in the amino acid sequence in the region translated into the protein. Further, the sequence identity of the obtained canine gene with the gene encoding the equine homologous factor was 93% nucleotide sequence and 97% amino acid sequence in the region translated into protein.
- the base sequence of the equine homologous factor is shown in SEQ ID NO: 17, and the amino acid sequence is shown in SEQ ID NO: 18.
- sequence identity between the gene encoding the human homologous factor and the gene encoding the equine homologous factor was 93% nucleotide sequence and 96% amino acid sequence in the region translated into protein. Further, the sequence identity of the obtained canine gene with the gene encoding the mouse homologous factor was 87 to 89% of the base sequence and 95 to 97% of the amino acid sequence in the region translated into protein.
- the nucleotide sequence of the mouse homologous factor is shown in SEQ ID NO: 19, 21, 23, 25, 27, and the amino acid sequence is shown in SEQ ID NO: 20, 22, 24, 26, 28.
- sequence identity between the gene encoding the human homologous factor and the gene encoding the mouse homologous factor was 89-91% of the base sequence and 95-96% of the amino acid sequence in the region translated into the protein.
- sequence identity of the acquired canine gene with the gene encoding the chicken homologous factor was 82% for the nucleotide sequence and 87% for the amino acid sequence in the region translated into protein.
- the base sequence of the chicken homologous factor is shown in SEQ ID NO: 29, and the amino acid sequence is shown in SEQ ID NO: 30.
- sequence identity between the gene encoding the human homologous factor and the gene encoding the chicken homologous factor was 81 to 82% of the base sequence and 86% of the amino acid sequence in the region translated into the protein.
- the PCR reaction was performed as follows using the obtained gene-specific primers (described in SEQ ID NOs: 33 and 34). That is, 0.25 ⁇ l of the sample prepared by the reverse transcription reaction, 2 ⁇ M each of the above primers, 0.2 mM of each dNTP, 0.65 U of ExTaq polymerase (Takara Shuzo Co., Ltd.), and each reagent and attached buffer were added to make a total volume of 25 ⁇ l. The cycle of 94 ° C. for 30 seconds, 60 ° C. for 30 seconds, and 72 ° C. for 30 seconds was repeated 30 times using a Thermal Cycler (manufactured by BIO RAD).
- a Thermal Cycler manufactured by BIO RAD
- the gene-specific primer was used to amplify a region of nucleotides 698 to 1124 in the nucleotide sequence of SEQ ID NO: 1 (human CAPRIN-1 gene).
- GAPDH specific primers (described in SEQ ID NOs: 35 and 36) were also used. As a result, expression was confirmed in the present cell line TGBC14TKB.
- Example 2 Preparation of anti-human CAPRIN-1 polyclonal antibody 1 mg of human CAPRIN-1 recombinant protein prepared according to Example 3 of WO2010 / 016526 was mixed with an equal volume of incomplete Freund's adjuvant (IFA) solution. Rabbits were administered subcutaneously 4 times every 2 weeks. Thereafter, blood was collected to obtain an antiserum containing a polyclonal antibody. Further, this antiserum was purified using a protein G carrier (manufactured by GE Healthcare Bioscience) to obtain an anti-CAPRIN-1 polyclonal antibody. Further, a serum obtained by purifying rabbit serum not administered with an antigen in the same manner as described above using a protein G carrier was used as a control antibody.
- IFA incomplete Freund's adjuvant
- Example 3 Expression analysis of CAPRIN-1 protein in human gallbladder cancer (1) Expression analysis of CAPRIN-1 protein on human gallbladder cancer cells was examined whether CAPRIN-1 protein was expressed on the cell surface. The TGBC14TKB10 6 cells the gene expression was observed was centrifuged at 1.5ml microcentrifuge tube. To this was added 2 ⁇ g (5 ⁇ l) of the anti-CAPRIN-1 polyclonal antibody prepared in Example 2, and the suspension was further suspended in PBS containing 95 ⁇ l of 0.1% fetal calf serum and allowed to stand on ice for 1 hour.
- the suspension was suspended in PBS containing 5 ⁇ l of FITC-labeled goat anti-rabbit IgG antibody (manufactured by Santa Cruz) and 95 ⁇ l of 0.1% fetal bovine serum (FBS) and allowed to stand on ice for 1 hour. After washing with PBS, the fluorescence intensity was measured with a FACS caliber from Becton Dickinson.
- the same operation as described above was performed using the control antibody prepared in Example 2 instead of the anti-CAPRIN-1 polyclonal antibody, and used as a control.
- TGBC14TKB to which the anti-human CAPRIN-1 polyclonal antibody was added had a fluorescence intensity of 20% or more as compared with the control. From this, it was confirmed that the CAPRIN-1 protein was expressed on the cell membrane surface of the human gallbladder cancer cell line.
- the enhancement rate of the fluorescence intensity is represented by the increase rate of the average fluorescence intensity (MFI value) in each cell, and was calculated by the following calculation formula.
- Example 2 Place the anti-CAPRIN-1 polyclonal antibody prepared in Example 2 in a PBS-T solution containing 5% FBS to a concentration of 10 ⁇ g / ml, and leave it overnight at 4 ° C. in a moist chamber. After washing 3 times for 10 minutes, an appropriate amount of Peroxidase Labeled Polymer Conjugated (manufactured by DAKO) was dropped, and the mixture was allowed to stand at room temperature for 30 minutes in a moist chamber. After washing with PBS-T 3 times for 10 minutes, add DAB coloring solution (manufactured by DAKO), let stand at room temperature for about 10 minutes, discard the coloring solution, and wash with PBS-T for 3 minutes for 10 minutes.
- DAB coloring solution manufactured by DAKO
- Example 4 Anti-tumor effect of anti-CAPRIN-1 polyclonal antibody on gallbladder cancer cells (ADCC activity) We examined whether anti-CAPRIN-1 antibodies can damage gallbladder cancer cells that express CAPRIN-1 protein. Evaluation was carried out using the anti-human CAPRIN-1 polyclonal antibody obtained in Example 2. 10 6 human gallbladder cancer cells with confirmed CAPRIN-1 protein expression were collected in a 50 ml centrifuge tube, added with 100 ⁇ Ci of chromium 51, and incubated at 37 ° C. for 2 hours. Thereafter, the plate was washed 3 times with RPMI 1640 medium containing 10% fetal bovine serum, and 10 3 pieces were added per well of a 96-well V-bottom plate.
- the cytotoxic activity was determined by mixing 10 3 tumor cells incorporating the anti-CAPRIN-1 antibody, lymphocytes and chromium 51 used in the present invention and culturing for 4 hours. This is a result of measuring the amount of chromium 51 released in the cell and showing the cytotoxic activity against tumor cells calculated by the following calculation formula * .
- Cytotoxic activity (%) chromium 51 release from tumor cells upon addition of anti-CAPRIN-1 antibody and lymphocytes ⁇ chromium 51 release from tumor cells added with 1N hydrochloric acid ⁇ 100.
- Example 5 Preparation of anti-CAPRIN-1 mouse and chicken monoclonal antibody 100 ⁇ g of the human CAPRIN-1 recombinant protein prepared in Example 2 was mixed with an equal amount of MPL + TDM adjuvant (manufactured by Sigma), and this was used for one mouse. The antigen solution was a hit. After the antigen solution was administered intraperitoneally to 6-week-old Balb / c mice (Japan SLC), immunization was completed by further 3 and 24 administrations per week.
- the obtained spleen cells and mouse myeloma cells SP2 / 0 purchased from ATCC were mixed at a ratio of 10: 1, and 200 ⁇ l of RPMI 1640 medium containing 10% FBS heated to 37 ° C. and PEG 1500 (Boehringer) PEG solution prepared by mixing 800 ⁇ l was added and allowed to stand for 5 minutes for cell fusion.
- the cells were suspended in 150 ml of RPMI 1640 medium (HAT selective medium) containing 15% FBS to which 2% equivalent of Gibco's HAT solution was added. 100 ⁇ l per well of (made) was seeded on 15 plates. By culturing under conditions of 37 ° C. and 5% CO 2 for 7 days, a hybridoma in which spleen cells and myeloma cells were fused was obtained.
- RPMI 1640 medium HAT selective medium
- FBS Gibco's HAT solution
- Hybridomas were selected using as an index the binding affinity of the antibody produced by the prepared hybridomas to the CAPRIN-1 protein.
- 100 ⁇ l of 1 ⁇ g / ml of the CAPRIN-1 protein solution prepared in Example 2 was added per well of a 96-well plate and allowed to stand at 4 ° C. for 18 hours. Each well was washed 3 times with PBS-T, and then added with 400 ⁇ l of 0.5% Bovine Serum Albumin (BSA) solution (manufactured by Sigma) per well and allowed to stand at room temperature for 3 hours.
- BSA Bovine Serum Albumin
- hybridomas were added to the plate so that the number was 0.5 per well of the 96-well plate and cultured. One week later, hybridomas forming a single colony in the well were observed. The cells in these wells were further cultured, and hybridomas were selected using the binding affinity of the antibody produced by the cloned hybridomas to the CAPRIN-1 protein as an index. 100 ⁇ l of 1 ⁇ g / ml of the CAPRIN-1 protein solution prepared in Example 2 was added per well of a 96-well plate and allowed to stand at 4 ° C. for 18 hours. After washing each well 3 times with PBS-T, 400 ⁇ l of 0.5% BSA solution was added per well and allowed to stand at room temperature for 3 hours.
- mouse monoclonal antibodies those showing reactivity on the cell surface of cancer cells expressing the CAPRIN-1 protein were selected.
- 10 6 human breast cancer cell lines MDA-MB-231V were centrifuged in a 1.5 ml microcentrifuge tube, and 100 ⁇ l of the culture supernatant of each hybridoma was added thereto, and 1 1 on ice. Let stand for hours. After washing with PBS, FITC-labeled goat anti-mouse IgG antibody (manufactured by life technologies) diluted 500-fold with PBS containing 0.1% FBS was added and allowed to stand on ice for 1 hour.
- mice After washing with PBS, the fluorescence intensity was measured with a FACS caliber from Becton Dickinson.
- the same operation as described above was performed using a serum of 6-week-old Balb / c mice that had not been treated in place of the antibody diluted 500-fold with a medium for hybridoma culture, and used as a control.
- 22 mouse monoclonal antibodies (mouse monoclonal antibodies # 1 to # 22) having a higher fluorescence intensity than the control, that is, reacting with the cell surface of breast cancer cells were selected.
- Example 2 In order to prepare a chicken monoclonal antibody, 300 ⁇ g of the antigen protein (human CAPRIN-1 protein) shown in SEQ ID NO: 2 prepared in Example 2 was mixed with an equal volume of Freund's complete adjuvant, and this was mixed with chicken 1 Antigen solution per wing was used. Immunization was completed by administering the antigen solution into the abdominal cavity of a 7-week-old chicken and administering it 7 times every 4 weeks. Each spleen removed 4 days after the last immunization was crushed between two sterilized glass slides, washed with PBS (-) (manufactured by Nissui), centrifuged at 1500 rpm for 10 minutes, and the supernatant was obtained. The removal operation was repeated 3 times to obtain spleen cells.
- PBS -
- the obtained spleen cells were mixed with chicken myeloma cells lacking the light chain established by transformation from chickens using avian reticuloendotheliosis virus at a ratio of 5: 1.
- a PEG solution prepared by mixing 200 ⁇ l of IMDM medium containing 10% FBS heated to 0 ° C. and 800 ⁇ l of PEG 1500 (manufactured by Boehringer) was added, and the mixture was allowed to stand for 5 minutes for cell fusion. After centrifuging at 1700 rpm for 5 minutes and removing the supernatant, the cells were suspended in 300 ml of IMDM medium (HAT selective medium) containing 10% FBS to which 2% equivalent of Gibco's HAT solution was added.
- IMDM medium HAT selective medium
- Hybridomas were selected using as an index the binding affinity of the antibody produced by the prepared hybridomas to the CAPRIN-1 protein.
- 100 ⁇ l of 1 ⁇ g / ml of the CAPRIN-1 protein solution prepared in Example 2 was added per well of a 96-well plate and allowed to stand at 4 ° C. for 18 hours. Each well was washed 3 times with PBS-T, and then added with 400 ⁇ l of 0.5% Bovine Serum Albumin (BSA) solution (manufactured by Sigma) per well and allowed to stand at room temperature for 3 hours.
- BSA Bovine Serum Albumin
- hybridomas were added to the plate so that the number was 0.5 per well of the 96-well plate and cultured. One week later, hybridomas forming a single colony in the well were observed. The cells in these wells were further cultured, and hybridomas were selected using the binding affinity of the antibody produced by the cloned hybridomas to the CAPRIN-1 protein as an index. 100 ⁇ l of human CAPRIN-1 protein solution (1 ⁇ g / ml) was added per well of a 96-well plate and allowed to stand at 4 ° C. for 18 hours. After washing each well 3 times with PBS-T, 400 ⁇ l of 0.5% BSA solution was added per well and allowed to stand at room temperature for 3 hours.
- the fluorescence intensity was measured with a FACS caliber from Becton Dickinson.
- the same operation as described above was performed using a hybridoma culture medium, and used as a control sample.
- three monoclonal antibodies (chicken monoclonal antibodies # 1, # 2, and # 3) having a higher fluorescence intensity than the control, that is, reacting with the cell surface of breast cancer cells expressing the CAPRIN-1 protein were selected.
- Example 6 Characterization of selected antibodies (1) Cloning of variable region genes of anti-CAPRIN-1 monoclonal antibody Each of the 22 mouse monoclonal antibodies and 3 chicken monoclonal antibodies selected in Example 5 MRNA is extracted from the hybridoma strain, and hybridomas producing mouse monoclonal antibodies use primers specific for mouse FR1-derived sequences and mouse FR4-derived sequences, and chicken FR1-derived sequences for hybridomas producing chicken monoclonal antibodies.
- the heavy chain variable (VH) region and light chain variable (VL) region genes of all anti-CAPRIN-1 monoclonal antibodies were obtained by RT-PCR using primers specific for the sequence derived from chicken FR4. The genes were cloned into pCR2.1 vector (life technologies) for sequencing.
- mRNA was prepared using mRNA micro purification kit (manufactured by GE Healthcare), and using SuperScript II 1st strand synthesis kit (manufactured by life technologies). The resulting mRNA was reverse transcribed to synthesize cDNA. These operations were performed according to the protocol attached to each kit.
- Antibody genes were amplified by PCR using the obtained cDNA. For obtaining the gene for the VH region, a primer specific for the mouse heavy chain FR1 sequence (SEQ ID NO: 257) and a primer specific for the mouse heavy chain FR4 sequence (SEQ ID NO: 258) were used.
- a primer specific for the mouse light chain FR1 sequence (SEQ ID NO: 259) and a primer specific for the mouse light chain FR4 (SEQ ID NO: 260) were used to obtain the gene for the VL region.
- SEQ ID NO: 259 a primer specific for the mouse light chain FR1 sequence
- SEQ ID NO: 260 a primer specific for the mouse light chain FR4
- a cDNA sample was added to 5 ⁇ l of 10 ⁇ EX Taq Buffer, 4 ⁇ l of dNTP Mixture (2.5 mM), 2 ⁇ l of each primer (1.0 ⁇ M) and 0.25 ⁇ l of Ex Taq (5 U / ⁇ l), and the total amount was made 50 ⁇ l with sterilized water. After treatment at 94 ° C. for 2 minutes, denaturation at 94 ° C. for 1 minute, annealing at 58 ° C. for 30 seconds, and extension reaction at 72 ° C. for 1 minute were performed under 30 cycles.
- PrimeScript II 1st strand cDNA Synthesis Kit (Takara) was used. CDNA was synthesized. These operations were performed according to the protocol attached to each kit. Using the synthesized cDNA as a template, chicken antibody heavy chain gene variable region and chicken antibody light chain gene variable region were each amplified by PCR using KOD-Plus-DNA Polymerase (manufactured by TOYOBO) according to a conventional method. For obtaining the gene of the VH region of the chicken antibody, a primer specific for the chicken heavy chain FR1 sequence and a primer specific for the chicken heavy chain FR4 sequence were used. In addition, a primer specific for the chicken light chain FR1 sequence and a primer specific for the chicken light chain FR4 were used to obtain the gene for the VL region.
- these monoclonal antibodies have SEQ ID NO: 40 (SEQ ID NO: 45), SEQ ID NO: 50 (SEQ ID NO: 55), SEQ ID NO: 60 (SEQ ID NO: 65), SEQ ID NO: 70 (SEQ ID NO: 75), SEQ ID NO: 80 (SEQ ID NO: 85), SEQ ID NO: 90 (SEQ ID NO: 95), SEQ ID NO: 100 (SEQ ID NO: 105), SEQ ID NO: 110 (SEQ ID NO: 115), SEQ ID NO: 120 (SEQ ID NO: 125), SEQ ID NO: 130 (SEQ ID NO: 131), SEQ ID NO: 135 (SEQ ID NO: 140), SEQ ID NO: 145 (SEQ ID NO: 150), SEQ ID NO: 160 (SEQ ID NO: 165), SEQ ID NO: 170 (SEQ ID NO: 175), SEQ ID NO: 200 (SEQ ID NO: 205), SEQ ID NO: 210 (SEQ ID NO: 215) ), SEQ ID NO: 220 (SEQ
- the amino acid sequence of the heavy chain variable region of the obtained monoclonal antibody is represented by SEQ ID NO: 40, SEQ ID NO: 50, SEQ ID NO: 60, SEQ ID NO: 70, SEQ ID NO: 80, SEQ ID NO: 90, SEQ ID NO: 100, SEQ ID NO: 110, SEQ ID NO: 120, SEQ ID NO: 130, SEQ ID NO: 135, SEQ ID NO: 145, SEQ ID NO: 160, SEQ ID NO: 170, SEQ ID NO: 200, SEQ ID NO: 210, SEQ ID NO: 220, SEQ ID NO: 230, SEQ ID NO: 240, and SEQ ID NO: 250 include the light chain variable region
- the amino acid sequence is SEQ ID NO: 44, SEQ ID NO: 54, SEQ ID NO: 64, SEQ ID NO: 74, SEQ ID NO: 84, SEQ ID NO: 94, SEQ ID NO: 104, SEQ ID NO: 114, SEQ ID NO: 124, SEQ ID NO:
- SEQ ID NO: 164 SEQ ID NO: 174, SEQ ID NO: 180, SEQ ID NO: 185, SEQ ID NO: 190, SEQ ID NO: 95, SEQ ID NO: 204, SEQ ID NO: 214, SEQ ID NO: 224, SEQ ID NO: 234, shown in SEQ ID NO: 244 and SEQ ID NO: 254.
- mouse monoclonal antibody # 1 consists of a heavy chain variable region of SEQ ID NO: 70 and a light chain variable region of SEQ ID NO: 74
- # 2 consists of a heavy chain variable region of SEQ ID NO: 80 and a light chain variable region of SEQ ID NO: 84
- # 3 is composed of the heavy chain variable region of SEQ ID NO: 90 and the light chain variable region of SEQ ID NO: 94
- # 4 is composed of the heavy chain variable region of SEQ ID NO: 100 and the light chain variable region of SEQ ID NO: 104
- # 5 is the sequence The heavy chain variable region of No.
- # 6 consists of the heavy chain variable region of SEQ ID NO: 120 and the light chain variable region of SEQ ID NO: 124
- # 7 is the heavy chain variable of SEQ ID NO: 130
- a chain variable region and a light chain variable region of SEQ ID NO: 124, # 8 is composed of a heavy chain variable region of SEQ ID NO: 135 and a light chain variable region of SEQ ID NO: 139
- # 9 is a heavy chain variable region of SEQ ID NO: 145 Of SEQ ID NO: 149
- # 10 consists of a heavy chain variable region of SEQ ID NO: 145 and a light chain variable region of SEQ ID NO: 155
- # 11 consists of a heavy chain variable region of SEQ ID NO: 160 and a light chain variable region of SEQ ID NO: 164.
- # 12 consists of a heavy chain variable region of SEQ ID NO: 170 and a light chain variable region of SEQ ID NO: 174
- # 13 consists of a heavy chain variable region of SEQ ID NO: 170 and a light chain variable region of SEQ ID NO: 180
- # 14 Is composed of the heavy chain variable region of SEQ ID NO: 170 and the light chain variable region of SEQ ID NO: 185
- # 15 is composed of the heavy chain variable region of SEQ ID NO: 170 and the light chain variable region of SEQ ID NO: 190
- # 16 is SEQ ID NO: 170.
- the heavy chain variable region of SEQ ID NO: 195, # 17 is composed of the heavy chain variable region of SEQ ID NO: 200 and the light chain variable region of SEQ ID NO: 204, and # 18 is the heavy chain variable of SEQ ID NO: 210.
- region It consists of the light chain variable region of SEQ ID NO: 214, # 19 consists of the heavy chain variable region of SEQ ID NO: 220 and the light chain variable region of SEQ ID NO: 224, and # 20 consists of the heavy chain variable region of SEQ ID NO: 230 and SEQ ID NO: 234
- # 21 consists of a heavy chain variable region of SEQ ID NO: 240 and a light chain variable region of SEQ ID NO: 244, and # 22 consists of a heavy chain variable region of SEQ ID NO: 250 and a light chain variable region of SEQ ID NO: 254 Consists of.
- amino acid sequence of the heavy chain variable region of the obtained chicken monoclonal antibody is shown in SEQ ID NO: 40, SEQ ID NO: 50, SEQ ID NO: 60, and the amino acid sequence of the light chain variable region is shown in SEQ ID NO: 44, SEQ ID NO: 54, SEQ ID NO: 64.
- chicken monoclonal antibody # 1 comprises a heavy chain variable region of SEQ ID NO: 40 and a light chain variable region of SEQ ID NO: 44, and CDRs 1 to 3 in the heavy chain variable region are SEQ ID NO: 37, SEQ ID NO: 38, Consisting of the amino acid sequence of No.
- CDRs 1 to 3 in the light chain variable region each consisting of the amino acid sequences of SEQ ID NO: 41, SEQ ID NO: 42 and SEQ ID NO: 43, and chicken monoclonal antibody # 2 is the heavy chain variable region of SEQ ID NO: 50
- CDR1 to 3 in the heavy chain variable region are composed of amino acid sequences of SEQ ID NO: 47, SEQ ID NO: 48 and SEQ ID NO: 49, respectively
- CDR1 to CDR in the light chain variable region are 3 consists of the amino acid sequences of SEQ ID NO: 51, SEQ ID NO: 52, SEQ ID NO: 53, respectively. It consists of a heavy chain variable region of No. 60 and a light chain variable region of SEQ ID No. 64.
- CDRs 1 to 3 in the heavy chain variable region consist of amino acid sequences of SEQ ID No. 57, SEQ ID No. 58 and SEQ ID No. 59, respectively.
- CDRs 1 to 3 in the chain variable region consist of the amino acid sequences of SEQ ID NO: 61, SEQ ID NO: 62, and SEQ ID NO: 63, respectively.
- both ends of the gene amplified fragment of the light chain variable region of chicken monoclonal antibody # 1 shown in SEQ ID NO: 44 were treated with restriction enzymes and purified to obtain a chicken antibody-derived leader sequence containing SEQ ID NO: 263 and SEQ ID NO: 265.
- L chain constant region of human IgG 1 containing already inserted in a conventional manner into already inserted pcDNA3.1 / myc-His (life technologies Inc.) vector.
- the recombinant vector was introduced into CHO-K1 cells (obtained from Riken Cell Bank). Specifically, 2 ⁇ 10 5 CHO-K1 cells cultured in Ham's F12 medium (manufactured by life technologies) containing 1 ml of 10% FBS per well of a 12-well culture plate were added to PBS ( ⁇ ).
- Human-chicken chimeric antibody # 1 having the variable region of chicken monoclonal antibody # 1 was seeded by seeding CHO-K1 cells into which the above recombinant vector was introduced so that the number was 0.5 per well of a 96-well plate. A cell line stably producing # 1) was prepared. In the same manner as described above, cell lines that stably produce human-chicken chimeric antibody # 2 (# 2) and human-chicken chimeric antibody # 3 (# 3) for chicken monoclonal antibodies # 2 and # 3 were prepared. did.
- the prepared cell line is cultured for 5 days using 30 ml of OptiCHO medium (manufactured by life technologies) without serum at 5 ⁇ 10 5 cells / ml in a 150 cm 2 flask, and contains # 1, # 2 or # 3 A culture supernatant was obtained.
- OptiCHO medium manufactured by life technologies
- both ends of the gene amplified fragment of the heavy chain variable region of chicken monoclonal antibody # 1 represented by SEQ ID NO: 40 were treated with restriction enzymes and purified to obtain a chicken antibody-derived leader sequence and mouse IgG 1 heavy chain constant region.
- the prepared cell line was cultured for 5 days in 30 ml of OptiCHO medium (manufactured by life technologies) without serum at 5 ⁇ 10 5 cells / ml in a 150 cm 2 flask, and mouse-chicken chimera antibody # 1, mouse- Culture supernatants containing chicken chimera antibody # 2 and mouse-chicken chimera antibody # 3 were obtained.
- mice- Culture supernatant 100 ⁇ l containing chicken chimera antibody # 2 and mouse-chicken chimera antibody # 3 was added and allowed to stand on ice for 1 hour. After washing with PBS, the suspension was suspended in FITC-labeled goat anti-mouse IgG antibody (manufactured by life technologies) diluted 500-fold with PBS containing 0.1% FBS and allowed to stand on ice for 1 hour. After washing with PBS, the fluorescence intensity was measured with a FACS caliber from Becton Dickinson.
- the enhancement rate of the fluorescence intensity is represented by the increase rate of the average fluorescence intensity (MFI value) in each cell, and was calculated by the following calculation formula.
- Average fluorescence intensity increase rate ((MFI value of cells reacted with anti-human CAPRIN-1 antibody) ⁇ (control MFI value)) ⁇ (control MFI value) ⁇ 100 (4) Anti-tumor effect of anti-CAPRIN-1 antibody on human gallbladder cancer cells (ADCC activity) Among the antibodies obtained above, cytotoxic activity (ADCC activity) against human gallbladder cancer cells was evaluated using human-chicken chimeric antibody # 1.
- the culture supernatant containing human-chicken chimera antibody # 1 obtained in (2) above was purified using Hitrap Protein A Sepharose FF (manufactured by GE Healthcare), replaced with PBS (-), and a 0.22 ⁇ m filter ( The product filtered through Millipore was used as an antibody for activity measurement.
- 10 6 human gallbladder cancer cell lines TGBC14TKB were collected in a 50 ml centrifuge tube, 100 ⁇ Ci of chromium 51 was added and incubated at 37 ° C. for 2 hours. Thereafter, the cells were washed 3 times with RPMI 1640 medium containing 10% FBS, and 2 ⁇ 10 3 cells were added per well of a 96-well V-bottom plate to prepare target cells.
- a cell population containing human NK cells was separated from human peripheral blood lymphocyte cells using the following method. That is, antibodies in which human peripheral blood mononuclear cells are labeled with a FITC fluorescent dye (anti-human CD3 antibody, anti-human CD20 antibody, anti-human CD19 antibody, anti-human CD11c antibody, anti-HLA-DR antibody (Becton & Dickinson) ), And using a cell sorter (FACS Vantage SE (Becton & Dickinson)), a cell population containing NK cells that do not stain with the above antibody, or a human NK cell isolation kit (NK cell isolation kit) (Milteny Co., Ltd.)) was obtained.
- a FITC fluorescent dye anti-human CD3 antibody, anti-human CD20 antibody, anti-human CD19 antibody, anti-human CD11c antibody, anti-HLA-DR antibody (Becton & Dickinson)
- FACS Vantage SE Becton & Dickinson
- the cytotoxic activity against TGBC14TKB was also examined for anti-CAPRIN-1 mouse monoclonal antibodies # 1 to # 22, human-chicken chimeric antibody # 2 and human-chicken chimeric antibody # 3 in the same manner as described above.
- Monoclonal antibody that reacts with one protein itself but does not react with the cell surface of cancer cells and cytotoxic activity when no antibody is added was less than 5%, whereas cytotoxic activity of 15% or more It was observed. From the above results, it was shown that the obtained anti-CAPRIN-1 monoclonal antibody damages cancer cells expressing the CAPRIN-1 protein by ADCC activity.
- the cytotoxic activity is obtained by mixing the anti-CAPRIN-1 antibody used in the present invention, a cell population containing human NK cells, and 2 ⁇ 10 3 tumor cells into which chromium 51 has been incorporated. This is a result of measuring the amount of chromium 51 that has been cultured for a period of time and released into the culture medium after culturing, and showed cytotoxic activity against tumor cells calculated by the following calculation formula * .
- Cytotoxic activity (%) chromium 51 release from tumor cells when adding cell population containing anti-CAPRIN-1 antibody and human NK cells ⁇ chromium 51 release from tumor cells with 1N hydrochloric acid added ⁇ 100.
- Example 7 Identification of peptide in CAPRIN-1 protein to which anti-CAPRIN-1 antibody that reacts on the cell surface of cancer cells binds
- the anti-antibody of # 12 to # 22 that reacts with the cell surface of cancer cells obtained above CAPRIN-1 monoclonal antibodies were used to identify partial sequences in the CAPRIN-1 proteins that they recognize.
- DTT (manufactured by Fluka) was added to 100 ⁇ l of a recombinant CAPRIN-1 protein solution dissolved in PBS to a concentration of 1 ⁇ g / ⁇ l so as to have a final concentration of 10 mM, and reacted at 95 ° C. for 5 minutes to cause CAPRIN- Reduction of disulfide bonds in one protein was performed, and then iodoacetamide (manufactured by Wako Pure Chemical Industries, Ltd.) having a final concentration of 20 mM was added, and a thiol group alkylation reaction was performed at 37 ° C. under light-shielding conditions for 30 minutes.
- iodoacetamide manufactured by Wako Pure Chemical Industries, Ltd.
- trypsin manufactured by Promega
- PBS protein A-glass beads
- NP-40 buffer 20 mM phosphate buffer (pH 7.4)
- 5 mM EDTA 150 mM NaCl, 1% NP-40
- the antigen-antibody complex was eluted with 100 ⁇ l of 0.1% formic acid, and Q-TOF Premier (Waters-MicroMass) was used for the eluate. LC-MS analysis was performed using this. Analysis followed the protocol attached to the instrument.
- polypeptide of SEQ ID NO: 273 was identified as a partial sequence of the CAPRIN-1 protein recognized by any of the anti-CAPRIN-1 monoclonal antibodies # 12 to # 22. Furthermore, the peptide of SEQ ID NO: 274 was identified as a partial sequence in the polypeptide of SEQ ID NO: 273 recognized by the monoclonal antibodies # 13 to # 16, # 17 to # 19 and # 21, and this partial sequence peptide It was found that monoclonal antibody # 13 to # 16 recognize the peptide of SEQ ID NO: 275.
- human-chicken chimeric monoclonal antibody # 1 human-chicken chimeric monoclonal antibody # 3
- epitope peptides in CAPRIN-1 proteins recognized by them were identified.
- 93 candidate peptides consisting of 12 to 16 amino acids in the amino acid sequence of human CAPRIN-1 protein were synthesized and dissolved in DMSO to a concentration of 1 mg / ml each.
- Each peptide was dissolved in 0.1 M sodium carbonate buffer (pH 9.6) to a concentration of 30 ⁇ g / ml, and 100 ⁇ l was added per well of a 96-well plate (Nunc, product number: 436006). And left at 4 ° C. overnight. Discard the solution, add 200 ⁇ l of 10 mM ethanolamine / 0.1 M sodium carbonate buffer (PH 9.6) per well, let stand at room temperature for 1 hour, discard the solution, and PBS containing 0.5% Tween 20 By washing twice with (PBST), a plate on which each peptide was immobilized was prepared.
- PBST PBS containing 0.5% Tween 20
- human-chicken chimeric monoclonal antibody # 1 (# 1), human-chicken chimeric monoclonal antibody # 3 (# 3) and mouse monoclonal antibody (# 1, # 2, # 3, # 4, # 5, # 6 , # 7, # 8, # 9, # 10, # 11), add 50 ⁇ l per well, shake at room temperature for 1 hour, remove the solution, and wash 3 times with PBST did.
- a secondary antibody solution in which an anti-human IgG antibody (manufactured by lifetechnologies) labeled with HRP is diluted 3000 to 4000 times with PBST is added to a human-chicken chimeric monoclonal antibody well, and HRP is added to a mouse monoclonal antibody.
- a TMB substrate solution (manufactured by Thermo) was added at 100 ⁇ l per well and allowed to stand for 15 to 30 minutes for color development reaction. After color development, 100 ⁇ l of 1N sulfuric acid was added per well to stop the reaction, and absorbance values at 450 nm and 595 nm were measured using an absorptiometer.
- the polypeptide of SEQ ID NO: 266 as a partial sequence of CAPRIN-1 recognized by the anti-CAPRIN-1 antibody human-chicken chimeric monoclonal antibody # 1 and the anti-CAPRIN-1 monoclonal antibodies of antibodies # 1 to # 5, respectively. was identified.
- the peptide of SEQ ID NO: 267 was identified as a partial sequence in the polypeptide of SEQ ID NO: 266 recognized by human-chicken chimeric monoclonal antibody # 1, mouse monoclonal antibody # 3 and # 4, and mouse monoclonal antibody # 1,
- the peptide of SEQ ID NO: 268 was identified as a partial sequence in the polypeptide of SEQ ID NO: 266 that is recognized by # 2 and # 5. Therefore, the polypeptide of SEQ ID NO: 266 contains the epitope regions of human-chicken chimeric monoclonal antibody # 1 of anti-CAPRIN-1 antibody, mouse monoclonal antibodies # 1, # 2, # 3, # 4 and # 5. understood.
- polypeptide comprising the amino acid sequence of SEQ ID NO: 270 was identified as a partial sequence of the CAPRIN-1 protein recognized by all of the anti-CAPRIN-1 monoclonal antibodies # 6, # 7 and # 8. Therefore, it was found that the polypeptide of SEQ ID NO: 270 contains the epitope regions of anti-CAPRIN-1 antibodies # 6, # 7 and # 8. Furthermore, a polypeptide comprising the amino acid sequence of SEQ ID NO: 272 was identified as a partial sequence of the CAPRIN-1 protein recognized by all of the anti-CAPRIN-1 monoclonal antibodies # 9, # 10, and # 11.
- polypeptide of SEQ ID NO: 272 contains the epitope regions of anti-CAPRIN-1 antibodies # 9, # 10 and # 11. Furthermore, a polypeptide comprising the amino acid sequence of SEQ ID NO: 269 was identified as a partial sequence of the CAPRIN-1 protein recognized by the human-chicken chimeric monoclonal antibody # 3. Therefore, it was found that the polypeptide of SEQ ID NO: 269 contains the epitope region of human-chicken chimeric monoclonal antibody # 3.
- Example 8 Preparation of mouse monoclonal antibodies # 30 and # 34 to 36 against CAPRIN-1 protein (1) Preparation of mouse anti-CAPRIN-1 monoclonal antibodies # 30 and # 34 to 36 Prepared in Example 3 of WO2010 / 016526 100 ⁇ g of human CAPRIN-1 protein having the amino acid sequence of SEQ ID NO: 2 was mixed with an equal amount of MPL + TDM adjuvant (manufactured by Sigma), and this was used as an antigen solution per mouse. The antigen solution was administered intraperitoneally to 6-week-old Balb / c mice (manufactured by Japan SLC), and then administered 7 times per week to complete immunization.
- MPL + TDM adjuvant manufactured by Sigma
- the obtained spleen cells and mouse myeloma cells SP2 / 0 purchased from ATCC were mixed at a ratio of 10: 1, and 200 ⁇ l of RPMI 1640 medium containing 10% FBS heated to 37 ° C. and PEG 1500 (Boehringer) PEG solution prepared by mixing 800 ⁇ l was added and allowed to stand for 5 minutes for cell fusion.
- the cells were suspended in 150 ml of RPMI 1640 medium (HAT selective medium) containing 15% FBS to which 2% equivalent of Gibco's HAT solution was added, and a 96-well plate (Nunk) 100 ⁇ l per well of (made) was seeded on 15 plates.
- RPMI 1640 medium HAT selective medium
- Nunk 96-well plate
- Hybridomas were selected using as an index the binding affinity of the antibody produced by the prepared hybridomas to the CAPRIN-1 protein.
- 100 ⁇ l of CAPRIN-1 protein solution 1 ⁇ g / ml prepared by the method described in Example 3 of WO2010 / 016526 was added per well of a 96-well plate and allowed to stand at 4 ° C. for 18 hours. After washing each well 3 times with PBS-T, 400 ⁇ l of 0.5% Bovine Serum Albumin (BSA) solution (manufactured by Sigma) was added per well and allowed to stand at room temperature for 3 hours.
- BSA Bovine Serum Albumin
- hybridomas were added to the plate so that the number was 0.5 per well of the 96-well plate and cultured. One week later, hybridomas forming a single colony in the well were observed. The cells in these wells were further cultured, and hybridomas were selected using the binding affinity of the antibody produced by the cloned hybridomas to the CAPRIN-1 protein as an index. 100 ⁇ l of CAPRIN-1 protein solution 1 ⁇ g / ml prepared by the method described in Example 3 of WO2010 / 016526 was added per well of a 96-well plate and allowed to stand at 4 ° C. for 18 hours.
- TMB substrate solution manufactured by Thermo
- 100 ⁇ l of TMB substrate solution 100 ⁇ l was added and allowed to stand for 15 to 30 minutes for color reaction.
- 100 ⁇ l of 1N sulfuric acid was added per well to stop the reaction, and absorbance values at 450 nm and 595 nm were measured using an absorptiometer.
- absorbance values at 450 nm and 595 nm were measured using an absorptiometer.
- Each peptide was dissolved in 0.1 M sodium carbonate buffer (pH 9.6) to a concentration of 30 ⁇ g / ml, and 100 ⁇ l was added per well of a 96-well plate (Nunc, product number: 436006). And left at 4 ° C. overnight. Discard the solution, add 200 ⁇ l of 10 mM ethanolamine / 0.1 M sodium carbonate buffer (PH 9.6) per well, let stand at room temperature for 1 hour, discard the solution, and PBS containing 0.5% Tween 20 By washing twice with (PBST), a plate on which each peptide was immobilized was prepared.
- PBST PBS containing 0.5% Tween 20
- TMB substrate solution manufactured by Thermo
- 100 ⁇ l per well was added at 100 ⁇ l per well and allowed to stand for 15 to 30 minutes for color development reaction. After color development, 100 ⁇ l of 1N sulfuric acid was added per well to stop the reaction, and absorbance values at 450 nm and 595 nm were measured using an absorptiometer.
- polypeptide of SEQ ID NO: 429 as a partial sequence of CAPRIN-1 recognized by mouse anti-CAPRIN-1 antibody # 30, and the sequence of SEQ ID NO: 431 as a partial sequence of CAPRIN-1 recognized by mouse anti-CAPRIN-1 antibody # 34
- the polypeptide of SEQ ID NO: 432 was identified as a partial sequence of CAPRIN-1 recognized by the polypeptide, mouse anti-CAPRIN-1 antibodies # 35 and 36.
- variable region gene of each mouse anti-CAPRIN-1 monoclonal antibody was analyzed for the gene sequence encoding the variable region and its amino acid sequence according to the method described in Example 5 of WO2010 / 016526.
- mouse anti-CAPRN-1 antibody # 30 contained a heavy chain variable region consisting of the amino acid sequence shown in SEQ ID NO: 344 and a light chain variable region consisting of the amino acid sequence shown in SEQ ID NO: 348.
- the gene sequence encoding the heavy chain variable region is shown in SEQ ID NO: 349, and the gene sequence encoding the light chain variable region is shown in SEQ ID NO: 350.
- CDR1 to CDR3 in the heavy chain variable region are each composed of the amino acid sequence shown in SEQ ID NO: 341, SEQ ID NO: 342, SEQ ID NO: 343, and CDR1 to 3 in the light chain variable region are respectively SEQ ID NO: 345, SEQ ID NO: 346, It was shown to consist of the amino acid sequence shown in SEQ ID NO: 347.
- mouse anti-CAPRN-1 antibody # 34 contained a heavy chain variable region consisting of the amino acid sequence shown in SEQ ID NO: 401 and a light chain variable region consisting of the amino acid sequence shown in SEQ ID NO: 405.
- the gene sequence encoding the heavy chain variable region is shown in SEQ ID NO: 406, and the gene sequence encoding the light chain variable region is shown in SEQ ID NO: 407.
- CDRs 1 to 3 in the heavy chain variable region are each composed of the amino acid sequences shown in SEQ ID NO: 398, SEQ ID NO: 399, and SEQ ID NO: 400, and CDRs 1 to 3 in the light chain variable region are respectively SEQ ID NO: 402, SEQ ID NO: 403, It was shown to consist of the amino acid sequence shown in SEQ ID NO: 404.
- Mouse anti-CAPRN-1 antibody # 35 contained a heavy chain variable region consisting of the amino acid sequence shown in SEQ ID NO: 411 and a light chain variable region consisting of the amino acid sequence shown in SEQ ID NO: 415.
- the gene sequence encoding the heavy chain variable region is shown in SEQ ID NO: 416, and the gene sequence encoding the light chain variable region is shown in SEQ ID NO: 417.
- CDRs 1 to 3 in the heavy chain variable region are each composed of the amino acid sequences shown in SEQ ID NO: 408, SEQ ID NO: 409, and SEQ ID NO: 410, and CDRs 1 to 3 in the light chain variable region are respectively SEQ ID NO: 412, SEQ ID NO: 413, It was shown to consist of the amino acid sequence shown in SEQ ID NO: 414.
- Mouse anti-CAPRN-1 monoclonal antibody # 36 contained a heavy chain variable region consisting of the amino acid sequence shown in SEQ ID NO: 421 and a light chain variable region consisting of the amino acid sequence shown in SEQ ID NO: 425.
- the gene sequence encoding the heavy chain variable region is shown in SEQ ID NO: 426, and the gene sequence encoding the light chain variable region is shown in SEQ ID NO: 427.
- CDRs 1 to 3 in the heavy chain variable region are each composed of the amino acid sequences shown in SEQ ID NO: 418, SEQ ID NO: 419, and SEQ ID NO: 420, and CDRs 1 to 3 in the light chain variable region are respectively SEQ ID NO: 422, SEQ ID NO: 423, It was shown to consist of the amino acid sequence shown in SEQ ID NO: 424.
- CAPRIN-1 protein was expressed on the cell surface. Investigate whether or not.
- the gallbladder cancer cell line 5 ⁇ 10 5 cells were centrifuged in a 1.5 ml microcentrifuge tube. This was reacted with each mouse anti-CAPRIN-1 antibody so that the final concentration was 20 ⁇ g / ml, and allowed to stand on ice for 1 hour.
- Alexa488-labeled Goat anti-mouse IgG antibody (manufactured by life technologies) diluted 100-fold was reacted and allowed to stand on ice for 30 hours. After washing with PBS, the fluorescence intensity was measured with a FACS caliber from Becton Dickinson. As a negative control, a negative control was prepared by reacting only the secondary antibody. As a result, the cells to which the anti-CAPRIN-1 antibody was added had a fluorescence intensity of 35% or more in the gallbladder cancer cells as compared with the control. This confirmed that CAPRIN-1 protein was expressed on the cell membrane surface of the gallbladder cancer cell line.
- Example 9 Production of mouse monoclonal antibody # 31 to 33 against CAPRIN-1 protein (1) Production of mouse anti-CAPRIN-1 antibody # 31 The amino acid sequence of SEQ ID NO: 2 prepared in Example 3 of WO2010 / 016526 100 ⁇ g of human CAPRIN-1 protein was mixed with an equal amount of MPL + TDM adjuvant (manufactured by Sigma), and this was used as an antigen solution per mouse. The antigen solution was administered intraperitoneally to 6-week-old Balb / c mice (manufactured by Japan SLC), and then administered 7 times per week to complete immunization.
- the obtained spleen cells and mouse myeloma cells SP2 / 0 purchased from ATCC were mixed at a ratio of 10: 1, and 200 ⁇ l of RPMI 1640 medium containing 10% FBS heated to 37 ° C. and PEG 1500 (Boehringer) PEG solution prepared by mixing 800 ⁇ l was added and allowed to stand for 5 minutes for cell fusion.
- the cells were suspended in 150 ml of RPMI 1640 medium (HAT selective medium) containing 15% FBS to which 2% equivalent of Gibco's HAT solution was added. 100 ⁇ l per well of (made) was seeded on 15 plates. By culturing under conditions of 37 ° C. and 5% CO 2 for 7 days, a hybridoma in which spleen cells and myeloma cells were fused was obtained.
- RPMI 1640 medium HAT selective medium
- FBS Gibco's HAT solution
- Hybridomas were selected using as an index the binding affinity of the antibody produced by the prepared hybridomas to the CAPRIN-1 protein.
- 100 ⁇ l of CAPRIN-1 protein solution 1 ⁇ g / ml prepared by the method described in Example 3 of WO2010 / 016526 was added per well of a 96-well plate and allowed to stand at 4 ° C. for 18 hours. Each well was washed 3 times with PBS-T, and then added with 400 ⁇ l of 0.5% Bovine Serum Albumin (BSA) solution (manufactured by Sigma) per well and allowed to stand at room temperature for 3 hours.
- BSA Bovine Serum Albumin
- hybridomas were added to the plate so that the number was 0.5 per well of the 96-well plate and cultured. One week later, hybridomas forming a single colony in the well were observed. The cells in these wells were further cultured, and hybridomas were selected using the binding affinity of the antibody produced by the cloned hybridomas to the CAPRIN-1 protein as an index. 100 ⁇ l of CAPRIN-1 protein solution 1 ⁇ g / ml prepared by the method described in Example 3 of WO2010 / 016526 was added per well of a 96-well plate and allowed to stand at 4 ° C. for 18 hours.
- TMB substrate solution manufactured by Thermo
- 100 ⁇ l of TMB substrate solution 100 ⁇ l was added and allowed to stand for 15 to 30 minutes for color reaction.
- 100 ⁇ l of 1N sulfuric acid was added per well to stop the reaction, and absorbance values at 450 nm and 595 nm were measured using an absorptiometer.
- absorbance values at 450 nm and 595 nm were measured using an absorptiometer.
- Each peptide was dissolved in 0.1 M sodium carbonate buffer (pH 9.6) to a concentration of 30 ⁇ g / ml, and 100 ⁇ l was added per well of a 96-well plate (Nunc, product number: 436006). And left at 4 ° C. overnight. Discard the solution, add 200 ⁇ l of 10 mM ethanolamine / 0.1 M sodium carbonate buffer (PH 9.6) per well, let stand at room temperature for 1 hour, discard the solution, and PBS containing 0.5% Tween 20 By washing twice with (PBST), a plate on which each peptide was immobilized was prepared.
- PBST PBS containing 0.5% Tween 20
- TMB substrate solution manufactured by Thermo
- 100 ⁇ l per well was added at 100 ⁇ l per well and allowed to stand for 15 to 30 minutes for color development reaction. After color development, 100 ⁇ l of 1N sulfuric acid was added per well to stop the reaction, and absorbance values at 450 nm and 595 nm were measured using an absorptiometer.
- polypeptide of SEQ ID NO: 430 was identified as a partial sequence of CAPRIN-1 recognized by mouse anti-CAPRIN-1 antibody # 31 obtained in (1).
- each antibody contained in the prepared culture supernatant of the hybridoma, 1 ⁇ g / ml of the CAPRIN-1 protein solution prepared in Example 3 of WO2010 / 016526, and the amino acid sequence of SEQ ID NO: 5 used as the immunogen and the carrier protein Antibodies were selected using the reactivity of the fusion protein with BSA as an index.
- 100 ⁇ l of a CAPRIN-1 protein solution 1 ⁇ g / ml prepared in Example 3 of WO2010 / 016526, 30 ⁇ g / ml of a fusion protein of the amino acid sequence of SEQ ID NO: 5 and carrier protein BSA was added to each well of a 96-well plate. It left still at 4 degreeC for 18 hours.
- Block Ace DS Pharma Biomedical
- 100 ⁇ l of each hybridoma culture supernatant obtained above was added per well and allowed to stand at room temperature for 2 hours.
- 100 ⁇ l of HRP-labeled anti-mouse IgG (H + L) antibody (manufactured by life technologies) diluted 5000 times with PBS was added and allowed to stand at room temperature for 1 hour.
- TMB substrate solution manufactured by Thermo
- 100 ⁇ l of TMB substrate solution manufactured by Thermo
- 100 ⁇ l of 1N sulfuric acid was added per well to stop the reaction, and absorbance values at 450 nm and 595 nm were measured using an absorptiometer. As a result, a hybridoma producing an antibody having a high absorbance value was selected.
- the selected hybridomas were added to the plate so that the number was 0.3 per well of the 96-well plate and cultured. One week later, hybridomas forming a single colony in the well were observed. The cells of these wells are further cultured, and using the same method as described above using the binding affinity for the amino acid sequence of SEQ ID NO: 430 of the CAPRIN-1 partial sequence of the antibody produced by the cloned hybridoma as an index, SEQ ID NO: A hybridoma producing an antibody against 430 amino acids was obtained.
- the monoclonal antibodies produced by the obtained hybridomas those showing reactivity on the surface of breast cancer cells expressing CAPRIN-1 were selected.
- 10 6 human breast cancer cell lines MDA-MB-231V were centrifuged in a 1.5 ml microcentrifuge tube, and 100 ⁇ l of the culture supernatant of each hybridoma was added thereto, and 1 1 on ice. Let stand for hours. After washing with PBS, FITC-labeled goat anti-mouse IgG antibody (manufactured by life technologies) diluted 500-fold with PBS containing 0.1% FBS was added and allowed to stand on ice for 1 hour.
- mouse anti-CAPRIN-1 antibodies # 32 and # 33 specifically react with a polypeptide having the amino acid sequence of SEQ ID NO: 430, which is a partial sequence of CAPRIN-1 as an immunogen.
- a solution containing the amino acid sequence of SEQ ID NO: 430 and a partial sequence of CAPRIN-1 not containing the amino acid sequence of SEQ ID NO: 430 prepared with 0.1 M sodium carbonate aqueous solution to 30 ⁇ g / ml were respectively added to the 96-well plate immobilizer amino for ELISA (Nunk 100 ⁇ g / ml each, and allowed to react overnight at 4 ° C. to bind the peptides to the wells.
- a 0.1 M sodium carbonate aqueous solution containing 10 mM ethanolamine was added to the well bound with the peptide and allowed to stand at room temperature for 1 hour. After removing the solution in the well, the plate was washed with PBS-T, and then 400 ⁇ l of Block Ace solution was added per well, and left at room temperature for 3 hours. After removing the solution in the well and washing with PBS-T, 50 ⁇ L of each culture supernatant containing mouse anti-CAPRIN-31 # 32 and # 33 was added to each well and allowed to react at room temperature for 1 hour.
- the plate was washed with PBS-T, and 50 ⁇ l of HRP-labeled anti-mouse IgG (H + L) antibody (manufactured by lifetechnologies) diluted 5000 times with a block ace solution was added per well and allowed to stand at room temperature for 1 hour. After wells were washed thoroughly with PBS-T, 100 ⁇ l of TMB substrate solution (Thermo) was added per well and allowed to stand for 5 to 30 minutes for color reaction. After color development, 100 ⁇ l of 1N sulfuric acid was added per well to stop the reaction, and absorbance values at 450 nm and 595 nm were measured using an absorptiometer.
- HRP-labeled anti-mouse IgG (H + L) antibody manufactured by lifetechnologies
- mice anti-CAPRIN-1 antibody # 31-33 obtained in (1) and (3), the method described in Example 5 of WO2010 / 016526 Thus, an amplified fragment of the gene encoding the variable region was obtained, and the gene sequence and its amino acid sequence were analyzed.
- the resulting gene sequence encoding the heavy chain variable region of mouse anti-CAPRIN-1 antibody # 31 is SEQ ID NO: 381, the amino acid sequence is SEQ ID NO: 376, and the gene sequence encoding the light chain variable region is SEQ ID NO: 382 and the amino acid sequence are shown in SEQ ID NO: 380.
- the gene sequence encoding the heavy chain variable region of the obtained mouse anti-CAPRIN-1 antibody # 32 is shown in SEQ ID NO: 391, the amino acid sequence is shown in SEQ ID NO: 386, and the gene sequence encoding the light chain variable region is shown in SEQ ID NO: The amino acid sequence is shown in SEQ ID NO: 390. Furthermore, the gene sequence encoding the heavy chain variable region of the obtained mouse anti-CAPRIN-1 antibody # 33 is SEQ ID NO: 397, the amino acid sequence is SEQ ID NO: 396, and the gene sequence encoding the light chain variable region is SEQ ID NO: 392 and the amino acid sequence are shown in SEQ ID NO: 390.
- CDRs 1 to 3 in the heavy chain variable region of mouse anti-CAPRIN-1 antibody # 31 are each composed of the amino acid sequences of SEQ ID NO: 373, SEQ ID NO: 374, and SEQ ID NO: 375, and CDRs 1 to 3 in the light chain variable region are respectively It was confirmed to consist of the amino acid sequences of SEQ ID NO: 377, SEQ ID NO: 378, and SEQ ID NO: 379.
- CDRs 1 to 3 in the heavy chain variable region of mouse anti-CAPRIN-1 antibody # 32 are each composed of the amino acid sequences of SEQ ID NO: 383, SEQ ID NO: 384, and SEQ ID NO: 385, and CDRs 1 to 3 in the light chain variable region are respectively It was confirmed to consist of the amino acid sequences of SEQ ID NO: 387, SEQ ID NO: 388, and SEQ ID NO: 389.
- CDRs 1 to 3 in the heavy chain variable region of mouse anti-CAPRIN-1 antibody # 33 are each composed of the amino acid sequences of SEQ ID NO: 393, SEQ ID NO: 394, and SEQ ID NO: 395, and CDRs 1 to 3 in the light chain variable region are It was confirmed to consist of the amino acid sequences of SEQ ID NO: 387, SEQ ID NO: 388, and SEQ ID NO: 389, respectively.
- Example 10 Expression analysis of CAPRIN-1 protein on gallbladder cancer cell membrane surface using mouse anti-CAPRIN-1 monoclonal antibody # 30-36
- human gallbladder cancer cell line TGBC14TKB CAPRIN-1 Whether or not the protein was expressed was examined using mouse anti-CAPRIN-1 monoclonal antibody # 30-36. 5 ⁇ 10 5 cells of TGBC14TKB were centrifuged in a 1.5 ml microcentrifuge tube. This was reacted with mouse anti-CAPRIN-1 monoclonal antibody # 30-36 to a final concentration of 20 ⁇ g / ml and allowed to stand on ice for 1 hour.
- Example 11 Production of human-mouse chimeric anti-CAPRIN-1 antibody
- Both ends of a gene amplification fragment containing the heavy chain variable region of each of mouse anti-CAPRIN-1 antibodies # 30 to 36 were treated with restriction enzymes and purified.
- a heavy chain constant region of human IgG1 containing a mouse antibody-derived leader sequence and the amino acid sequence of SEQ ID NO: 264 was inserted into a previously inserted pcDNA4 / myc-His (manufactured by life technologies) vector according to a conventional method.
- both ends of the gene amplification fragment containing the light chain variable region of each of the mouse anti-CAPRIN-1 antibodies # 30 to 36 were purified after restriction enzyme treatment, and the mouse antibody-derived leader sequence and the amino acid sequence of SEQ ID NO: 265 were obtained.
- the human IgG1 L chain constant region contained was inserted into the already inserted pcDNA3.1 / myc-His (manufactured by life technologies) vector according to a conventional method.
- CHO-K1 cells introduced with the above recombinant vector were cultured in Ham'sF12 medium containing 10% FBS supplemented with 200 ⁇ g / ml zeocin (manufactured by life technologies) and 200 ⁇ g / ml geneticin (manufactured by Roche).
- Humans having respective variable regions of mouse anti-CAPRIN-1 antibodies # 30 to 36 are seeded by seeding CHO-K1 cells into which the above recombinant vector has been introduced so that the number is 0.5 per well of a 96-well plate.
- -Cell lines were produced that stably produced mouse chimeric anti-CAPRIN-1 antibodies # 30-36, respectively.
- the prepared cell line was cultured for 5 days in 30 ml of OptiCHO medium (manufactured by life technologies) containing 5 ⁇ 10 5 cells / ml in 150 cm 2 flask and containing no serum, and human-mouse chimeric anti-CAPRIN-1 antibody # Culture supernatants containing 30 to 36 were obtained.
- OptiCHO medium manufactured by life technologies
- Anti-tumor activity (ADCC activity) of anti-CAPRIN-1 antibody against gallbladder cancer cells In order to evaluate the cytotoxicity against gallbladder cancer cells expressing CAPRIN-1 in the antibody against the CAPRIN-1-derived peptide shown in SEQ ID NOs: 429 to 432, human-mouse chimeric anti-CAPRIN-1 antibody # 30-36 was used. Were used to measure ADCC activity.
- the gallbladder cancer cell line TGBC14TKB was collected in 10 6 50 ml centrifuge tubes, added with 100 ⁇ Ci of chromium 51, and incubated at 37 ° C. for 2 hours.
- the plate was washed 3 times with RPMI 1640 medium containing 10% fetal bovine serum.
- Human-mouse chimeric anti-CAPRIN-1 antibody # 30-36 is added to each well of each 96-well V-bottom plate to a final concentration of 5 ⁇ g / ml, and human peripheral blood lymph is added to the effector cells.
- 2 ⁇ 10 5 human NK cells separated from sphere cells using a conventional method were added per well.
- the gallbladder cancer cells into which chromium 51 was taken up were mixed at 2 ⁇ 10 3 per well and cultured for 4 hours, and the amount of chromium 51 released into the medium after the culture was measured.
- the cytotoxic activity against the gallbladder cancer cell line was calculated by the calculation formula * .
- Cytotoxic activity (%) chromium 51 release from target cells upon addition of antibody against CAPRIN-1 and lymphocytes ⁇ chromium 51 release from target cells added with 1N hydrochloric acid ⁇ 100.
- Example 13 Preparation of anti-CAPRIN-1 monoclonal antibody using rabbit (1) Preparation of rabbit anti-CAPRIN-1 monoclonal antibody # 1 300 ⁇ g of antigen protein (human CAPRIN-1) was mixed with an equal volume of Freund's complete adjuvant. This was used as an antigen solution per rabbit. In the second and subsequent immunizations, those mixed with incomplete adjuvant with Frein were used. Immunization was completed by administering the antigen solution into the abdominal cavity of a 7-week-old rabbit 7 times every 4 weeks.
- the obtained spleen cells and rabbit myeloma cells were mixed at a ratio of 5: 1, and 200 ⁇ l of IMDM medium containing 10% FBS heated to 37 ° C. and 800 ⁇ l of PEG 1500 (Boehringer) were mixed. The prepared PEG solution was added and allowed to stand for 5 minutes for cell fusion.
- the cells were suspended in 300 ml of IMDM medium (HAT selective medium) containing 10% FBS to which 2% equivalent of Gibco's HAT solution was added. 100 ⁇ l per well of (made) was seeded on 30 plates. By culturing under conditions of 37 ° C. and 5% CO 2 for 7 days, a hybridoma in which spleen cells and rabbit myeloma cells were fused was obtained.
- IMDM medium HAT selective medium
- FBS Gibco's HAT solution
- Hybridomas were selected using as an index the reactivity of the antibody produced by the prepared hybridomas with the CAPRIN-1 protein.
- 100 ⁇ l of CAPRIN-1 protein solution (1 ⁇ g / ml) was added per well of a 96-well plate and allowed to stand at 4 ° C. for 18 hours.
- Each well was washed 3 times with PBS-T, and then added with 400 ⁇ l of 0.5% Bovine Serum Albumin (BSA) solution (manufactured by Sigma) per well and allowed to stand at room temperature for 3 hours.
- BSA Bovine Serum Albumin
- hybridomas were added to the plate so that the number was 0.5 per well of the 96-well plate and cultured. One week later, hybridomas forming a single colony in the well were observed. Cells in these wells were further cultured, and hybridomas were selected using the reactivity of antibodies produced by the cloned hybridomas to the CAPRIN-1 protein as an index. 100 ⁇ l of CAPRIN-1 protein solution (1 ⁇ g / ml) was added per well of a 96-well plate and allowed to stand at 4 ° C. for 18 hours. After washing each well 3 times with PBS-T, 400 ⁇ l of 0.5% BSA solution was added per well and allowed to stand at room temperature for 3 hours.
- the fluorescence intensity was measured with a FACS caliber from Becton Dickinson.
- the same operation as described above was performed using a culture medium for hybridoma culture, and used as a negative control sample.
- the fluorescence intensity was stronger than that of the negative control, that is, one rabbit anti-CAPRIN-1 monoclonal antibody (rabbit anti-PRA-1) that reacts on the cell surface of cancer cells MDA-MB-231 and QG56 expressing CAPRIN-1.
- the CAPRIN-1 monoclonal antibody # 1 was selected.
- CAPRIN-1 epitope recognized by the selected rabbit anti-CAPRIN-1 monoclonal antibody # 1 was identified.
- 93 candidate peptides consisting of 12 to 16 amino acids in the amino acid sequence of human CAPRIN-1 protein were synthesized and dissolved in DMSO to a concentration of 1 mg / ml each.
- a secondary antibody solution obtained by diluting the anti-rabbit IgG antibody labeled with HRP 3000-4000 times with PBST was added to each well, and then the solution was removed, followed by washing 6 times with PBST.
- a TMB substrate solution (Thermo) was added at 100 ⁇ L per well and allowed to stand for 15 to 30 minutes for color development reaction. After color development, 100 ⁇ L of 1N sulfuric acid was added per well to stop the reaction, and absorbance values at 450 nm and 595 nm were measured using an absorptiometer.
- the rabbit anti-CAPRIN-1 monoclonal antibody rabbit anti-CAPRIN-1 monoclonal antibody # 1 is only a polypeptide having the amino acid sequence shown in SEQ ID NO: 430 out of 93 synthesized peptides that are partial sequences of CAPRIN-1. And no reactivity with other polypeptides. Also. Rabbit anti-CAPRIN-1 monoclonal antibody # 1 showed specific reactivity with CAPRIN-1 protein. From this result, it was found that the epitope of rabbit anti-CAPRIN-1 monoclonal antibody # 1 was contained in the polypeptide of SEQ ID NO: 430.
- the resulting rabbit anti-CAPRIN-1 monoclonal antibody # 1 has the heavy chain variable region shown in SEQ ID NO: 359 and the CDR1-3 in the heavy chain variable region represented by SEQ ID NO: 351, SEQ ID NO: 352, and SEQ ID NO: 353, respectively. It was confirmed that the light chain variable region shown in SEQ ID NO: 361 and CDRs 1 to 3 in the light chain variable region consist of amino acid sequences of SEQ ID NO: 354, SEQ ID NO: 355, and SEQ ID NO: 356, respectively.
- human-rabbit chimeric anti-CAPRIN-1 antibody # 1 against a polypeptide having the amino acid sequence of SEQ ID NO: 430, which is an epitope of CAPRIN-1 protein and rabbit anti-CAPRIN-1 monoclonal antibody # 1 The human-rabbit chimeric anti-CAPRIN-1 antibody # 1 was tested against the polypeptide having the amino acid sequence of SEQ ID NO: 430 as well as the rabbit anti-CAPRIN-1 monoclonal antibody # 1. It was confirmed to have reaction specificity.
- the reactivity of the CAPRIN-1 protein on the cell surface of each cell of the human-rabbit chimeric anti-CAPRIN-1 antibody # 1 was examined. 10 6 cells of each cell line were centrifuged in a 1.5 ml microcentrifuge tube. Each cell culture supernatant (100 ⁇ l) containing the antibody was added and left on ice for 1 hour. After washing with PBS, Alexa488-labeled goat anti-human IgG (H + L) antibody (manufactured by life technologies) diluted 100-fold with PBS containing 0.1% FBS was added and allowed to stand at 4 ° C. for 60 minutes.
- the enhancement rate of the fluorescence intensity is represented by the increase rate of the average fluorescence intensity (MFI value) in each cell, and was calculated by the following calculation formula.
- Average fluorescence intensity increase rate (fluorescence intensity enhancement rate) (%) ((MFI value of cells reacted with anti-CAPRIN-1 antibody) ⁇ (control MFI value)) ⁇ (control MFI value) ⁇ 100.
- human NK cells were separated from human peripheral blood lymphocyte cells prepared according to a conventional method, and 2 ⁇ 10 5 cells were added per well. 2 ⁇ 10 3 cells were mixed per well in a 96-well V-bottom plate to which the target and antibody had been added, and cultured under conditions of 37 ° C., 5%, CO 2 for 4 hours. After the culture, the amount of chromium 51 in the culture supernatant released from the damaged tumor cells was measured, and the cytotoxic activity against gallbladder cancer cells by the anti-CAPRIN-1 antibody was calculated. A negative control was added with an isotype control antibody.
- the cytotoxic activity when isotype control antibody was used was less than 5% for gallbladder cancer cells, whereas human-rabbit chimeric anti-CAPRIN-1 antibody # 1 was effective against gallbladder cancer cells.
- the antitumor activity was 25% or more.
- the antibody human-rabbit chimeric anti-CAPRIN-1 antibody # 1 against the CAPRIN-1-derived peptide shown in SEQ ID NO: 430 exhibits antitumor activity against gallbladder cancer cells expressing CAPRIN-1 by ADCC activity. It became clear.
- Example 14 Preparation of humanized anti-CAPRIN-1 antibody # 1-3
- a humanized antibody of rabbit anti-CAPRIN-1 antibody # 1 was prepared.
- CDRs 1 to 3 in the heavy chain variable region are composed of the amino acids of SEQ ID NO: 351, SEQ ID NO: 352, and SEQ ID NO: 357
- the nucleotide sequence of SEQ ID NO: 362 is designed so that the heavy chain variable region (SEQ ID NO: 363) containing the human antibody sequence can be expressed, and this is used for expression of mammalian cells into which the heavy chain constant region of human IgG1 is inserted. Inserted into vector.
- CDRs 1 to 3 in the light chain variable region consist of amino acids of SEQ ID NO: 354, SEQ ID NO: 355, and SEQ ID NO: 356, and the framework region includes a light chain variable region (SEQ ID NO: 365) containing the sequence of a human antibody.
- the nucleotide sequence of SEQ ID NO: 364 was designed so that it could be expressed, and this was inserted into a mammalian cell expression vector into which the light chain constant region of human IgG1 was inserted.
- the two recombinant expression vectors were introduced into mammalian cells according to a conventional method to obtain a culture supernatant containing humanized anti-CAPRIN-1 antibody # 1.
- CDR1 to CDR3 consist of amino acids of SEQ ID NO: 351, SEQ ID NO: 352, and SEQ ID NO: 353, and the framework region is human.
- the nucleotide sequence of SEQ ID NO: 367 is designed so that the heavy chain variable region (SEQ ID NO: 368) containing the antibody sequence can be expressed, and this is inserted into a mammalian cell expression vector into which the heavy chain constant region of human IgG1 has been inserted. did.
- CDRs 1 to 3 in the light chain variable region consist of amino acids of SEQ ID NO: 354, SEQ ID NO: 355, and SEQ ID NO: 356, and the framework region includes a light chain variable region (SEQ ID NO: 370) containing the sequence of a human antibody.
- the nucleotide sequence of SEQ ID NO: 369 was designed so that it could be expressed, and this was inserted into a mammalian cell expression vector into which the light chain constant region of human IgG1 was inserted.
- the two recombinant expression vectors were introduced into mammalian cells according to a conventional method to obtain a culture supernatant containing humanized anti-CAPRIN-1 antibody # 2.
- CDR1 to CDR3 consist of amino acids of SEQ ID NO: 351, SEQ ID NO: 352, and SEQ ID NO: 353, and the framework region is human.
- the base sequence of SEQ ID NO: 371 is designed so that the heavy chain variable region (SEQ ID NO: 372) containing the antibody sequence can be expressed, and this is inserted into a mammalian cell expression vector into which the heavy chain constant region of human IgG1 has been inserted. did.
- CDRs 1 to 3 in the light chain variable region consist of amino acids of SEQ ID NO: 354, SEQ ID NO: 355, and SEQ ID NO: 356, and the framework region includes a light chain variable region (SEQ ID NO: 370) containing the sequence of a human antibody.
- the nucleotide sequence of SEQ ID NO: 369 was designed so that it could be expressed, and this was inserted into a mammalian cell expression vector into which the light chain constant region of human IgG1 was inserted.
- the two recombinant expression vectors were introduced into mammalian cells according to a conventional method to obtain a culture supernatant containing humanized anti-CAPRIN-1 antibody # 3.
- An anti-CAPRIN-1 monoclonal antibody # 24 composed of a chain variable region, represented by SEQ ID NO: 294 including a complementarity determining region composed of amino acid sequences represented by SEQ ID NOs: 291, 292 and 293 (CDR1, CDR2, CDR3, respectively)
- Anti-CAPRIN- consisting of a light chain variable region represented by SEQ ID NO: 298, comprising a heavy chain variable region and a complementarity determining region (CDR1, CDR2, CDR3, respectively) consisting of the amino acid sequences represented by SEQ ID NOS: 295,296 and 297 1
- Monoclonal antibody # 25 SEQ ID NO: obtained in WO / 2013/018894
- the heavy chain variable region represented by SEQ ID NO: 304 and the SEQ ID NOs: 305, 306, and 307 including the complementarity determining regions (CDR1, CDR2, CDR3, respectively) consisting of the amino acid sequences represented by 301, 302, and 303 Sequence obtained by anti-
- Complementarity determining regions consisting of amino acid sequences (CDR1, CDR2, Anti-CAPRIN-1 monoclonal antibody # 27 consisting of a light chain variable region represented by SEQ ID NO: 318 including DR3), consisting of amino acid sequences represented by SEQ ID NOs: 321, 322 and 323 obtained in WO / 2013/018889
- Example 16 Anti-tumor activity of human-mouse chimeric anti-CAPRIN-1 antibody # 23-29 against gallbladder cancer cells Mouse anti-CAPRIN-1 antibody # 23- # described in Example 15 in the same manner as in Example 11 Cell lines that stably produce human-mouse chimeric anti-CAPRIN-1 antibodies # 23 to 29 each having 29 variable regions were prepared, and human-mouse chimeric anti-CAPRIN-1 antibodies # 23 to 29 were respectively produced. A culture supernatant containing was obtained. This supernatant was purified by a conventional method and examined for antitumor activity against gallbladder cancer cells.
- ADCC activity was measured using human-mouse chimeric anti-CAPRIN-1 antibody # 23-29.
- all human-mouse chimeric anti-CAPRIN-1 antibodies showed 20% or more activity in the gallbladder cancer cell line TGBC14TKB.
- the human IgG1 antibody used as a negative control was less than 5% active against gallbladder cancer cells.
- the antibody of the present invention is useful for the treatment and / or prevention of gallbladder cancer.
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Abstract
Description
本発明で用いられる抗CAPRIN-1抗体を取得するための感作抗原として使用されるタンパク質又はその断片は、ヒト、イヌ、ウシ、ウマ、マウス、ラット、ニワトリなど、その由来となる動物種に制限されない。しかし細胞融合に使用する親細胞との適合性を考慮して選択することが好ましく、一般的には、哺乳動物由来のタンパク質が好ましく、特にヒト由来のタンパク質が好ましい。例えば、CAPRIN-1タンパク質がヒトCAPRIN-1タンパク質の場合、ヒトCAPRIN-1タンパク質やその部分ペプチド、ヒトCAPRIN-1タンパク質を発現する細胞などを用いることができる。
抗体は通常少なくとも2本の重鎖及び2本の軽鎖を含むヘテロ多量体糖タンパク質である。IgMは別として、2本の同一の軽(L)鎖及び2本の同一の重(H)鎖で構成される約150kDaのヘテロ四量体糖タンパク質である。典型的には、それぞれの軽鎖は1つのジスルフィド共有結合により重鎖に連結されているが、種々の免疫グロブリンアイソタイプの重鎖間のジスルフィド結合の数は変動する。それぞれの重鎖及び軽鎖はまた鎖内ジスルフィド結合も有する。それぞれの重鎖は一方の端に可変ドメイン(VH領域)を有し、それにいくつかの定常領域が続く。それぞれ軽鎖は可変ドメイン(VL領域)を有し、その反対の端に1つの定常領域を有する。軽鎖の定常領域は重鎖の最初の定常領域と整列しており、かつ軽鎖可変ドメインは重鎖の可変ドメインと整列している。抗体の可変ドメインは特定の領域が相補性決定領域(CDR)と呼ばれる特定の可変性を示して抗体に結合特異性を付与する。可変領域の相対的に保存されている部分はフレームワーク領域(FR)と呼ばれている。完全な重鎖及び軽鎖の可変ドメインはそれぞれ3つのCDRにより連結された4つのFRを含む。3つのCDRは重鎖ではそのN末から順にCDRH1,CDRH2,CDRH3、同様に軽鎖ではCDRL1,CDRL2,CDRL3と呼ばれている。抗体の抗原への結合特異性には、CDRH3が最も重要である。また、各鎖のCDRはFR領域によって近接した状態で一緒に保持され、他方の鎖からのCDRと共に抗体の抗原結合部位の形成に寄与する。定常領域は抗体が抗原に結合することに直接寄与しないが、種々のエフェクター機能、例えば、抗体依存性細胞性細胞障害活性(ADCC)への関与、Fcγ受容体への結合を介した食作用、新生児Fc受容体(FcRn)を介した半減期/クリアランス速度、補体カスケードのC1q構成要素を介した補体依存性細胞障害(CDC)を示す。
本発明における抗CAPRIN-1抗体とは、CAPRIN-1タンパク質の全長又はその断片と免疫学的反応性を有する抗体を意味する。
抗体がCAPRIN-1タンパク質に結合する能力は、実施例で述べられるようなたとえば ELISA、ウエスタンブロット法、免疫蛍光及びフローサイトメトリー分析などを用いた結合アッセイを利用して特定することができる。
CAPRIN-1タンパク質を認識する抗体は、当業者に周知の方法での免疫組織化学により、外科手術の間に患者から得た組織や、自然に又はトランスフェクション後にCAPRIN-1タンパク質を発現する細胞系を接種した異種移植組織を担持する動物から得た組織から、パラホルムアルデヒド又はアセトン固定した凍結切片又はパラホルムアルデヒドで固定したパラフィン包埋した組織切片を使用して、CAPRIN-1タンパク質との反応性に関して試験することができる。
本発明の胆嚢癌の治療及び/又は予防のための医薬組成物の標的は、CAPRIN-1遺伝子を発現する胆嚢癌(細胞)であれば特に限定されない。
(1)cDNAライブラリーの作製
健常な犬の精巣組織から酸グアニジウム-フェノール-クロロホルム法(Acid guanidium-Phenol-Chloroform法)により全RNAを抽出し、Oligotex-dT30 mRNA purification Kit(宝酒造社製)を用いてキット添付のプロトコールに従ってポリA RNAを精製した。
上記作製したイヌ精巣cDNAファージライブラリーを用いて、イムノスクリーニングを行った。具体的にはΦ90×15mmのNZYアガロースプレートに2210クローンとなるように宿主大腸菌(XL1-Blue MRF’)に感染させ、42℃、3~4時間培養し、溶菌斑(プラーク)を作らせ、IPTG(イソプロピル-β-D-チオガラクトシド)を浸透させたニトロセルロースメンブレン(Hybond C Extra: GE Healthcare Bio-Scinece社製)でプレートを37℃で4時間覆うことによりタンパク質を誘導・発現させ、メンブレンにタンパク質を転写した。その後メンブレンを回収し0.5%脱脂粉乳を含むTBS(10mM Tris-HCl, 150mM NaCl pH7.5)に浸し4℃で一晩振盪することによって非特異反応を抑制した。このフィルターを500倍希釈した患犬血清と室温で2~3時間反応させた。
上記方法により単離した5個の陽性クローンを塩基配列解析に供するため、ファージベクターからプラスミドベクターに転換する操作を行った。具体的には宿主大腸菌(XL1-Blue MRF’)を吸光度OD600が1.0となるよう調製した溶液200μlと、精製したファージ溶液250μlさらにExAssist helper phage(STRATAGENE社製)1μlを混合した後37℃で15分間反応後、LB培地を3ml添加し37℃で2.5~3時間培養を行い、直ちに70℃の水浴にて20分間保温した後、4℃、1000×g、15分間遠心分離を行い上清をファージミド溶液として回収した。次いでファージミド宿主大腸菌(SOLR)を吸光度OD600が1.0となるよう調製した溶液200μlと、精製したファージ溶液10μlを混合した後37℃で15分間反応させ、50μlをアンピシリン(終濃度50μg/ml)含有LB寒天培地に播き37℃一晩培養した。トランスフォームしたSOLRのシングルコロニーを採取し、アンピシリン(終濃度50μg/ml)含有LB培地37℃にて培養後、QIAGEN plasmid Miniprep Kit(キアゲン社製)を使って目的のインサートを持つプラスミドDNAを精製した。
上記方法により得られた遺伝子に対しヒトの胆嚢癌細胞株TGBC14TKB(独立行政法人理化学研究所より入手)における発現をRT-PCR法により調べた。逆転写反応は以下の通り行なった。すなわち、各組織50~100mg及び各細胞株5~10×106個の細胞からTRIZOL試薬(invitrogen社製)を用いて添付のプロトコールに従い全RNAを抽出した。この全RNAを用いてSuperscript First-Strand Synthesis System for RT-PCR(invitrogen社製)により添付のプロトコールに従いcDNAを合成した。PCR反応は、取得した遺伝子特異的なプライマー(配列番号33及び34に記載)を用いて以下の通り行った。すなわち、逆転写反応により調製したサンプル0.25μl、上記プライマーを各2μM、0.2mM各dNTP、0.65UのExTaqポリメラーゼ(宝酒造社製)となるように各試薬と添付バッファーを加え全量を25μlとし、Thermal Cycler(BIO RAD社製)を用いて、94℃-30秒、60℃-30秒、72℃-30秒のサイクルを30回繰り返して行った。なお、上記遺伝子特異的プライマーは、配列番号1の塩基配列(ヒトCAPRIN-1遺伝子)中の698番~1124番塩基の領域を増幅するものであった。比較対照のため、GAPDH特異的なプライマー(配列番号35及び36に記載)も同時に用いた。その結果、本細胞株TGBC14TKBで発現が確認された。
WO2010/016526の実施例3に従って作製したヒトCAPRIN-1組換えタンパク質1mgを等容量の不完全フロイントアジュバント(IFA)溶液と混合し、これを2週間毎に4回、ウサギの皮下に投与を行った。その後血液を採取し、ポリクローナル抗体を含む抗血清を得た。さらにこの抗血清をプロテインG担体(GEヘルスケアバイオサイエンス社製)を用いて精製し、抗CAPRIN-1ポリクローナル抗体を得た。また、抗原を投与していないウサギの血清を上記と同様にしてプロテインG担体を用いて精製したものをコントロール抗体とした。
(1)ヒト胆嚢癌細胞上でのCAPRIN-1タンパク質の発現解析
CAPRIN-1遺伝子の発現が確認されたヒト胆嚢癌細胞株TGBC14TKBについて、その細胞表面上にCAPRIN-1タンパク質が発現しているかどうかを調べた。上記で遺伝子発現が認められたTGBC14TKB106細胞を1.5mlのミクロ遠心チューブにて遠心分離した。これに実施例2で調製した抗CAPRIN-1ポリクローナル抗体2μg(5μl)を添加し、さらに95μlの0.1%牛胎児血清を含むPBSで懸濁後、氷上で1時間静置した。PBSで洗浄した後、5μlのFITC標識ヤギ抗ラビットIgG抗体(サンタクルズ社製)及び95μlの0.1%牛胎児血清(FBS)を含むPBSで懸濁し、氷上で1時間静置した。PBSで洗浄後、ベクトンディッキンソン株式会社のFACSキャリバーにて蛍光強度を測定した。一方、上記と同様の操作を、抗CAPRIN-1ポリクローナル抗体の代わりに実施例2で調製したコントロール抗体を用いて行い、コントロールとした。その結果、抗ヒトCAPRIN-1ポリクローナル抗体を添加されたTGBC14TKBは、コントロールに比べて、いずれも蛍光強度が20%以上強かった。このことから、上記ヒト胆嚢癌細胞株の細胞膜表面上にCAPRIN-1タンパク質が発現していることが確認された。なお、上記蛍光強度の増強率は、各細胞における平均蛍光強度(MFI値)の増加率にて表され、以下の計算式により算出した。
パラフィン包埋されたヒト胆嚢癌組織アレイ(BIOMAX社製)の胆嚢癌組織26検体を用いて、免疫組織化学染色を行った。ヒト胆嚢癌組織アレイを60℃で3時間処理後、キシレンを満たした染色瓶に入れて5分ごとにキシレンを入れ替える操作を3回行った。次にキシレンの代わりにエタノール及びPBS-Tで同様の操作を行った。0.05%Tween20を含む10mMクエン酸緩衝液(pH6.0)を満たした染色瓶にヒト胆嚢癌組織アレイを入れ、125℃で5分間処理後、室温で40分以上静置した。切片周囲の余分な水分をキムワイプでふき取り、DAKOPENで囲み、Peroxidase Block(DAKO社製)を適量滴下した。室温で5分間静置後、PBS-Tを満たした染色瓶に入れて5分ごとにPBS-Tを入れ替える操作を3回行った。ブロッキング液として、10%FBSを含むPBS-T溶液をのせ、モイストチャンバー内で室温で1時間静置した。実施例2で調製した抗CAPRIN-1ポリクローナル抗体を5%FBSを含むPBS-T溶液で10μg/mlに調製した溶液をのせ、モイストチャンバー内で4℃で一晩静置し、PBS-Tで10分間3回洗浄を行った後、Peroxidase Labelled Polymer Conjugated(DAKO社製)適量滴下し、モイストチャンバー内で室温で30分間静置した。PBS-Tで10分間3回洗浄を行った後、DAB発色液(DAKO社製)をのせ、室温で10分程度静置した後、発色液を捨て、PBS-Tで10分間3回洗浄を行った後、蒸留水でリンスし、70%、80%、90%、95%、100%の各エタノール溶液に順番に1分間ずつ入れた後、キシレン中で一晩静置した。スライドガラスを取り出し、Glycergel Mounting Medium(DAKO社製)で封入後、観察を行った。その結果、CAPRIN-1タンパク質は全胆嚢癌組織26検体の内、19検体(73%)で強い発現が認められた。
抗CAPRIN-1抗体が、CAPRIN-1タンパク質を発現する胆嚢癌細胞を障害することができるかどうかを検討した。実施例2で得た抗ヒトCAPRIN-1ポリクローナル抗体を用いて評価を行った。CAPRIN-1タンパク質の発現が確認されているヒト胆嚢癌細胞TGBC14TKBを106個50ml容の遠心チューブに集め、100μCiのクロミウム51を加え37℃で2時間インキュベートした。その後10%牛胎児血清を含むRPMI1640培地で3回洗浄し、96穴V底プレート1穴あたり103個ずつ添加した。これに、上記抗ヒトCAPRIN-1ポリクローナル抗体を1μg添加し、さらにヒト末梢血から分離したリンパ球をそれぞれ2×105個ずつ添加して、37℃、5%CO2の条件下で4時間培養した。培養後、障害を受けた腫瘍細胞から放出される培養上清中のクロミウム(Cr)51の量を測定し、抗ヒトCAPRIN-1ポリクローナル抗体による胆嚢癌細胞に対するADCC活性を算出した。その結果、抗原が免疫されていないウサギの末梢血から調製したコントロール抗体を用いて同様の操作を行った場合、TGBC14TKBに対して5%未満であり、抗体を添加しなかった場合においても5%未満であったのに対して、抗ヒトCAPRIN-1ポリクローナル抗体を加えた場合には、14%以上のADCC活性が確認された。したがって、抗CAPRIN-1抗体を用いたADCC活性により、CAPRIN-1タンパク質を発現する胆嚢癌細胞を障害することができることが明らかになった。なお、細胞障害活性は、上記のように、本発明で用いられる抗CAPRIN-1抗体、リンパ球及びクロミウム51を取り込ませた103個の腫瘍細胞を混合して4時間培養し、培養後培地に放出されたクロミウム51の量を測定して、以下計算式*により算出した腫瘍細胞に対する細胞障害活性を示した結果である。
実施例2で作製したヒトCAPRIN-1組換えタンパク質100μgを等量のMPL+TDMアジュバント(シグマ社製)と混合し、これをマウス1匹当たりの抗原溶液とした。抗原溶液を6週齢のBalb/cマウス(日本SLC社製)の腹腔内に投与後、1週間毎にさらに3回及び24回投与を行い免疫を完了した。最後の免疫から3日後に摘出したそれぞれの脾臓を滅菌した2枚のスライドガラスに挟んで擦り潰し、PBS(-)(日水社製)を用いて洗浄し1500rpmで10分間遠心して上清を除去する操作を3回繰り返して脾臓細胞を得た。得られた脾臓細胞とマウスミエローマ細胞SP2/0(ATCCから購入)とを10:1の比率にて混和し、そこに37℃に加温した10%FBSを含むRPMI1640培地200μlとPEG1500(ベーリンガー社製)800μlを混和して調製したPEG溶液を加えて5分間静置して細胞融合を行った。1700rpmで5分間遠心し、上清を除去後、Gibco社製のHAT溶液を2%当量加えた15%FBSを含むRPMI1640培地(HAT選択培地)150mlで細胞を懸濁し、96穴プレート(ヌンク社製)の1ウェル当たり100μlずつ、プレート15枚に播種した。7日間、37℃、5%CO2の条件で培養することで、脾臓細胞とミエローマ細胞が融合したハイブリドーマを得た。
(1)抗CAPRIN-1モノクローナル抗体の可変領域遺伝子のクローニング
実施例5で選抜した22個のマウスモノクローナル抗体ならびに3個のニワトリモノクローナル抗体をそれぞれ産生する各ハイブリドーマ株から、mRNAを抽出し、マウスモノクローナル抗体を産生するハイブリドーマにはマウスFR1由来配列及びマウスFR4由来の配列に特異的なプライマーを使用し、ニワトリモノクローナル抗体を産生するハイブリドーマにはニワトリFR1由来配列及びニワトリFR4由来の配列に特異的なプライマーを使用したRT-PCR法により、全ての抗CAPRIN-1モノクローナル抗体の重鎖可変(VH)領域及び軽鎖可変(VL)領域の遺伝子を取得した。配列決定のために、それら遺伝子をpCR2.1ベクター(life technologies社製)にクローニングした。
106個のマウスモノクローナル抗体を産生する各ハイブリドーマ株から、mRNA micro purification kit(GEヘルスケア社製)を用いてmRNAを調製し、SuperScriptII 1st strand synthesis kit(life technologies社製)を用いて、得られたmRNAを逆転写してcDNAを合成した。これら操作は各キットの添付プロトコールに従って行った。得られたcDNAを用いて、PCR法により抗体遺伝子の増幅を行った。VH領域の遺伝子取得のために、マウス重鎖FR1配列に特異的なプライマー(配列番号257)及びマウス重鎖FR4配列に特異的なプライマー(配列番号258)を使用した。またVL領域の遺伝子取得のために、マウス軽鎖FR1配列に特異的なプライマー(配列番号259)及びマウス軽鎖FR4に特異的なプライマー(配列番号260)を使用した。これらプライマーはJones, S.T. and Bending, M.M. Bio/Technology 9, 88-89 (1991)を参考に設計した。PCRは、Ex-taq(タカラバイオ社製)を用いた。10×EX Taq Buffer 5μl、dNTP Mixture(2.5mM)4μl、プライマー(1.0μM)各2μl、Ex Taq(5U/μl)0.25μlにcDNAサンプルを加え、滅菌水により総量50μlとした。94℃で2分処理後、変性94℃1分、アニーリング58℃30秒、伸長反応72℃1分の組み合わせで30サイクルの条件で行った。
上記で得られた各PCR産物を用いてアガロースゲルにて電気泳動を行い、VH領域及びVL領域それぞれのDNAバンドを切り出した。DNA断片はQIAquick Gel purification kit(キアゲン社製)を用いてその添付プロトコールに従って行った。精製した各DNAはTAクローニングキット(life technologies社製)を用いてpCR2.1ベクターにクローニングした。連結したベクターをDH5aコンピテントセル(TOYOBO社製)に定法に従い形質転換を行った。各形質転換体それぞれ10クローンを培地(100μg/mlアンピシリン)で37℃一晩培養後、各プラスミドDNAをQiaspin Miniprep kit(キアゲン社製)を用いて精製した。
上記で得られた各プラスミド中のVH領域及びVL領域の遺伝子配列解析は、M13フォワードプライマー(配列番号261)及びM13リバースプライマー(配列番号262)を用いて、蛍光シーケンサー(ABI社製DNAシーケンサー3130XL)により、ABI社製のビッグダイターミネーターVer3.1サイクルシーケンシングキットを用いて、その添付プロトコールに従い行った。その結果、各々の遺伝子配列及びアミノ酸配列が決定された。
上記(1)で得られた、配列番号40で示されるニワトリモノクローナル抗体#1の重鎖可変領域の遺伝子増幅断片の両端を制限酵素処理した後精製し、配列番号263を含むニワトリ抗体由来のリーダー配列と配列番号264を含むヒトIgG1のH鎖定常領域を既に挿入済みのpcDNA4/myc-His(life technologies社製)ベクターへ常法に従って挿入した。また、配列番号44で示されるにニワトリモノクローナル抗体#1の軽鎖可変領域の遺伝子増幅断片の両端を制限酵素処理した後精製し、配列番号263を含むニワトリ抗体由来のリーダー配列と配列番号265を含むヒトIgG1のL鎖定常領域を既に挿入済みのpcDNA3.1/myc-His(life technologies社製)ベクターへ常法に従って挿入した。
次にCAPRIN-1遺伝子の発現が確認された胆嚢癌細胞株TGBC14TKBについて、その細胞表面上にCAPRIN-1タンパク質が発現しているかどうかを調べた。TGBC14TKB106細胞を1.5ml容のミクロ遠心チューブにて遠心分離した。これに実施例4で作製した癌細胞表面に反応する、#1から#22の抗CAPRIN-1マウスモノクローナル抗体ならびに上記(2)で作製した抗CAPRIN-1マウス-ニワトリキメラ抗体#1、マウス-ニワトリキメラ抗体#2、マウス-ニワトリキメラ抗体#3を含む培養上清(100μl)を添加し、氷上で1時間静置した。PBSで洗浄した後、0.1% FBSを含むPBSで500倍希釈したFITC標識ヤギ抗マウスIgG抗体(life technologies社製)で懸濁し、氷上で1時間静置した。PBSで洗浄後、ベクトンディッキンソン株式会社のFACSキャリバーにて蛍光強度を測定した。一方、上記と同様の操作を、#1から#22の抗CAPRIN-1マウスモノクローナル抗体ならびにマウス-ニワトリキメラ抗体#1、マウス-ニワトリキメラ抗体#2、マウス-ニワトリキメラ抗体#3を含む培養上清の代わりにアイソタイプコントロール抗体を用いて行い、コントロールとした。その結果、#1~#22のモノクローナル抗体、マウス-ニワトリキメラ抗体#1、マウス-ニワトリキメラ抗体#2、マウス-ニワトリキメラ抗体#3を添加された細胞は、コントロールに比べて、いずれも蛍光強度が20%以上強かった。具体的例を挙げると、マウス-ニワトリキメラ抗体#1を用いた場合は200%以上の蛍光強度の増強を示した。このことから、上記ヒト胆嚢癌細胞株の細胞膜表面上にCAPRIN-1タンパク質が発現していることが確認された。なお、上記蛍光強度の増強率は、各細胞における平均蛍光強度(MFI値)の増加率にて表され、以下の計算式により算出した。
(4)抗CAPRIN-1抗体のヒト胆嚢癌細胞に対する抗腫瘍効果(ADCC活性)
上記で得た抗体のうち、ヒト-ニワトリキメラ抗体#1を用いてヒト胆嚢癌細胞に対する細胞障害活性(ADCC活性)を評価した。上記(2)で得たヒト-ニワトリキメラ抗体#1を含む培養上清をHitrap ProteinA SepharoseFF(GEヘルスケア社製)を用いて精製し、PBS(-)に置換して0.22μmのフィルター(ミリポア社製)で濾過したものを活性測定用の抗体として用いた。106個のヒト胆嚢癌細胞株TGBC14TKBを50ml容の遠心チューブに集め、100μCiのクロミウム51を加え37℃で2時間インキュベートした。その後10%FBSを含むRPMI1640培地で3回洗浄し、96穴V底プレート1穴あたり2×103個ずつ添加して標的細胞とした。これに、上記精製抗体を1穴あたり1.2μg添加した。さらに、ヒト末梢血リンパ球細胞から以下の手法を用いてヒトNK細胞を含む細胞集団を分離した。すなわち、ヒト末梢血単核球細胞をFITC蛍光色素で標識された抗体(抗ヒトCD3抗体、抗ヒトCD20抗体、抗ヒトCD19抗体、抗ヒトCD11c抗体、抗HLA-DR抗体(ベクトンアンドディッキンソン社))で反応させ、セルソーター(FACS Vantage SE(ベクトンアンドディッキンソン社))を用いて、上記抗体で染まらないNK細胞を含んだ細胞集団を分離したもの、又はヒトNK細胞分離キット(NKセルアイソレーションキット(ミルテニー社製))を用いて分離したものを得た。得られたNK細胞を含む細胞を1ウェル当たり2×105個添加して、37℃、5%、CO2の条件下で4時間培養した。培養後、障害を受けた腫瘍細胞から放出される培養上清中のクロミウム51の量を測定し、抗CAPRIN-1抗体による胆嚢癌細胞に対するADCC活性を算出した。その結果、TGBC14TKBに対して、CAPRIN-1タンパク質自体には反応するが、癌細胞の細胞表面に反応しないモノクローナル抗体ならびに抗体を添加しなかった場合の細胞障害活性はいずれも5%未満であったのに対して、ヒト-ニワトリキメラ抗体#1は20%の細胞障害活性が得られた。なお、#1~#22の抗CAPRIN-1マウスモノクローナル抗体、ヒト-ニワトリキメラ抗体#2ならびにヒト-ニワトリキメラ抗体#3についても上記と同様にしてTGBC14TKBに対する細胞障害活性を調べたところ、CAPRIN-1タンパク質自体には反応するが、癌細胞の細胞表面に反応しないモノクローナル抗体ならびに抗体を添加しなかった場合の細胞障害活性は5%未満であったのに対して、15%以上の細胞障害活性が見られた。以上の結果より、取得した抗CAPRIN-1モノクローナル抗体は、ADCC活性によってCAPRIN-1タンパク質を発現する癌細胞を障害することが示された。なお、細胞障害活性は、上記のように、本発明で用いられる抗CAPRIN-1抗体、ヒトNK細胞を含む細胞集団及びクロミウム51を取り込ませた2×103個の腫瘍細胞を混合して4時間培養し、培養後培地に放出されたクロミウム51の量を測定して、以下計算式*により算出した腫瘍細胞に対する細胞障害活性を示した結果である。
上記で取得した、癌細胞の細胞表面に反応する#12~#22の抗CAPRIN-1モノクローナル抗体を用いて、それらが認識するCAPRIN-1タンパク質中の部分配列の同定を行った。
(1)マウス抗CAPRIN-1モノクローナル抗体#30、#34~36の作製
WO2010/016526の実施例3で調製した配列番号2のアミノ酸配列を有するヒトCAPRIN-1タンパク質100μgを等量のMPL+TDMアジュバント(シグマ社製)と混合し、これをマウス1匹当たりの抗原溶液とした。抗原溶液を6週齢のBalb/cマウス(日本SLC社製)の腹腔内に投与後、1週間毎に7回投与を行い、免疫を完了した。最後の免疫から3日後に摘出したそれぞれの脾臓を滅菌した2枚のスライドガラスに挟んで擦り潰し、PBS(-)(日水社製)を用いて洗浄し1500rpmで10分間遠心して上清を除去する操作を3回繰り返して脾臓細胞を得た。得られた脾臓細胞とマウスミエローマ細胞SP2/0(ATCCから購入)とを10:1の比率にて混和し、そこに37℃に加温した10%FBSを含むRPMI1640培地200μlとPEG1500(ベーリンガー社製)800μlを混和して調製したPEG溶液を加えて5分間静置して細胞融合を行った。1700rpmで5分間遠心し、上清を除去後、Gibco社製のHAT溶液を2%当量加えた15% FBSを含むRPMI1640培地(HAT選択培地)150mlで細胞を懸濁し、96穴プレート(ヌンク社製)の1ウェル当たり100μlずつ、プレート15枚に播種した。7日間、37℃、5%CO2の条件で培養することで、脾臓細胞とミエローマ細胞が融合したハイブリドーマを得た。
取得したモノクローナル抗体4個それぞれが認識するCAPRIN-1エピトープ領域の同定を行った。ヒトCAPRIN-1タンパク質のアミノ酸配列中、12~16アミノ酸から成る、93個の候補ペプチドを合成し、それぞれ1mg/mlの濃度になるようにDMSOで溶解した。
取得したモノクローナル抗体について、WO2010/016526の実施例5に記載の方法に従って可変領域をコードする遺伝子配列及びそのアミノ酸配列を解析した。
ヒトの胆嚢癌細胞株TGBC14TKBについて、その細胞表面上にCAPRIN-1タンパク質が発現しているかどうかを調べた。上記胆嚢癌細胞株5×105細胞を1.5mlのミクロ遠心チューブにて遠心分離した。これに各マウス抗CAPRIN-1抗体を最終濃度が20μg/mlとなるように反応させて、氷上で1時間静置した。PBSで洗浄した後、100倍希釈したAlexa488標識Goat anti-mouse IgG抗体(life technologies社製)を反応させ、氷上で30時間静置した。PBSで洗浄後、ベクトンディッキンソン株式会社のFACSキャリバーにて蛍光強度を測定した。陰性コントロールとして、二次抗体のみを反応させたものを陰性コントロールとした。その結果、抗CAPRIN-1抗体を添加された細胞は、コントロールに比べて、胆嚢癌細胞も蛍光強度が35%以上強かった。このことから、胆嚢癌細胞株の細胞膜表面上にCAPRIN-1タンパクが発現していることが確認された。
(1)マウス抗CAPRIN-1抗体#31の作製
WO2010/016526の実施例3で調製した配列番号2のアミノ酸配列を有するヒトCAPRIN-1タンパク質100μgを等量のMPL+TDMアジュバント(シグマ社製)と混合し、これをマウス1匹当たりの抗原溶液とした。抗原溶液を6週齢のBalb/cマウス(日本SLC社製)の腹腔内に投与後、1週間毎に7回投与を行い、免疫を完了した。最後の免疫から3日後に摘出したそれぞれの脾臓を滅菌した2枚のスライドガラスに挟んで擦り潰し、PBS(-)(日水社製)を用いて洗浄し1500rpmで10分間遠心して上清を除去する操作を3回繰り返して脾臓細胞を得た。得られた脾臓細胞とマウスミエローマ細胞SP2/0(ATCCから購入)とを10:1の比率にて混和し、そこに37℃に加温した10%FBSを含むRPMI1640培地200μlとPEG1500(ベーリンガー社製)800μlを混和して調製したPEG溶液を加えて5分間静置して細胞融合を行った。1700rpmで5分間遠心し、上清を除去後、Gibco社製のHAT溶液を2%当量加えた15%FBSを含むRPMI1640培地(HAT選択培地)150mlで細胞を懸濁し、96穴プレート(ヌンク社製)の1ウェル当たり100μlずつ、プレート15枚に播種した。7日間、37℃、5%CO2の条件で培養することで、脾臓細胞とミエローマ細胞が融合したハイブリドーマを得た。
上記(1)で取得した癌細胞の細胞表面に反応するCAPRIN-1に対するモノクローナル抗体(マウス抗CAPRIN-1抗体#31)を用いて、認識するCAPRIN-1エピトープ領域の同定を行った。ヒトCAPRIN-1タンパク質のアミノ酸配列中、12~16アミノ酸から成る、93個の候補ペプチドを合成し、それぞれ1mg/mlの濃度になるようにDMSOで溶解した。
上記(1)と同様の方法で、(2)で同定した配列番号430のアミノ酸配列を有するポリペプチドとキャリアタンパク質のKLH(Keyhole limpet haemocyanin)との融合タンパク質を免疫原として、等量のアジュバント剤TiterMax Gold(登録商標)(CytRx社)と混合して7日間隔でマウスの腹腔に1回あたり100μg投与した。合計4回の投与を行った後、最終免疫から3日後のマウスから脾臓細胞を得て、上記(1)と同様の方法にてマウスミエローマ細胞と融合してハイブリドーマを作製した。その後、作製したハイブリドーマの培養上清中に含まれる各抗体とWO2010/016526の実施例3で調製したCAPRIN-1タンパク溶液1μg/ml並びに免疫原として用いた配列番号5のアミノ酸配列とキャリアタンパク質のBSAとの融合タンパク質との反応性を指標に抗体を選抜した。WO2010/016526の実施例3で調製したCAPRIN-1タンパク溶液1μg/mlと配列番号5のアミノ酸配列とキャリアタンパク質のBSAとの融合タンパク質30μg/mlをそれぞれ96穴プレート1ウェル当たりに100μl添加して4℃にて18時間静置した。各ウェルをPBS-Tで洗浄後、ブロックエース(DSファーマバイオメディカル社)溶液を1ウェル当たり400μl添加して室温にて3時間静置した。溶液を除いて、PBS-Tでウェルを洗浄後、上記で得られたハイブリドーマの各培養上清を1ウェル当たり100μl添加し、室温で2時間静置した。PBS-Tで各ウェルを洗浄した後、PBSで5000倍に希釈したHRP標識抗マウスIgG(H+L)抗体(life technologies社製)を1ウェル当たり100μl添加して室温にて1時間静置した。PBS-Tでウェルを洗浄した後、TMB基質溶液(Thermo社製)を1ウェル当たり100μl添加して5~30分間静置して発色反応を行った。発色後、1規定硫酸を1ウェル当たり100μl添加して反応を停止させ、吸光度計を用いて450nmと595nmの吸光度値を測定した。その結果、吸光度値が高かった抗体を産生するハイブリドーマを選抜した。
(1)と(3)で得られたマウス抗CAPRIN-1抗体#31~33について、WO2010/016526の実施例5に記載の方法に従って可変領域をコードする遺伝子の増幅断片を取得し、遺伝子配列並びにそのアミノ酸配列を解析した。その結果得られたマウス抗CAPRIN-1抗体#31の重鎖可変領域をコードする遺伝子配列を配列番号381に、及びアミノ酸配列を配列番号376に、軽鎖可変領域をコードする遺伝子配列を配列番号382、及びアミノ酸配列を配列番号380に示す。また、得られたマウス抗CAPRIN-1抗体#32の重鎖可変領域をコードする遺伝子配列を配列番号391に、及びアミノ酸配列を配列番号386に、軽鎖可変領域をコードする遺伝子配列を配列番号392に及びアミノ酸配列を配列番号390に示す。さらにまた、得られたマウス抗CAPRIN-1抗体#33の重鎖可変領域をコードする遺伝子配列を配列番号397に、及びアミノ酸配列を配列番号396、軽鎖可変領域をコードする遺伝子配列を配列番号392に、及びアミノ酸配列を配列番号390に示す。
ヒトの胆嚢癌細胞株TGBC14TKBについて、その細胞表面上にCAPRIN-1タンパク質が発現しているかどうかをマウス抗CAPRIN-1モノクローナル抗体#30~36を用いて調べた。TGBC14TKBを5×105細胞を1.5mlのミクロ遠心チューブにて遠心分離した。これにマウス抗CAPRIN-1モノクローナル抗体#30~36を最終濃度が20μg/mlとなるようにそれぞれ反応させて、氷上で1時間静置した。PBSで洗浄した後、100倍希釈したAlexa488標識Goat anti-mouse IgG抗体(life technologies社製)を反応させ、氷上で30時間静置した。PBSで洗浄後、ベクトンディッキンソン株式会社のFACSキャリバーにて蛍光強度を測定した。陰性コントロールとして、二次抗体のみを反応させたものを陰性コントロールとした。その結果、マウス抗CAPRIN-1モノクローナル抗体#30~36を添加されたTGBC14TKBは、コントロールに比べて蛍光強度が35%以上強かった。このことから、上記胆嚢癌細胞株の細胞膜表面上にCAPRIN-1タンパク質が発現していることが確認された。
マウス抗CAPRIN-1抗体#30~36のそれぞれの重鎖可変領域を含んだ遺伝子増幅断片の両端を制限酵素処理した後精製し、マウス抗体由来のリーダー配列と配列番号264のアミノ酸配列を含むヒトIgG1のH鎖定常領域を既に挿入済みのpcDNA4/myc-His(life technologies社製)ベクターへ常法に従って挿入した。また、マウス抗CAPRIN-1抗体#30~36のそれぞれの軽鎖可変領域を含んだ遺伝子増幅断片の両端を制限酵素処理した後精製し、マウス抗体由来のリーダー配列と配列番号265のアミノ酸配列を含むヒトIgG1のL鎖定常領域を既に挿入済みのpcDNA3.1/myc-His(life technologies社製)ベクターへ常法に従って挿入した。
配列番号429~432に示すCAPRIN-1由来ペプチドに対する抗体におけるCAPRIN-1を発現する胆嚢癌細胞に対する細胞障害性の強さを評価するためにヒト-マウスキメラ抗CAPRIN-1抗体#30~36を用いてADCC活性を測定した。胆嚢癌細胞株TGBC14TKBを106個50ml容の遠心チューブに集め、100μCiのクロミウム51を加え37℃で2時間インキュベートした。その後10%牛胎児血清を含むRPMI1640培地で3回洗浄した。96穴V底プレート各ウェルにヒト-マウスキメラ抗CAPRIN-1抗体#30~36をそれぞれのウェルに添加して最終濃度が5μg/mlとなるように添加し、さらにエフェクター細胞にヒト末梢血リンパ球細胞から定法を用いて分離したヒトNK細胞を1ウェル当たり2×105個添加した。そこにクロミウム51を取り込ませた前記胆嚢癌細胞を1ウェルあたり2×103個となるように混合して4時間培養し、培養後培地に放出されたクロミウム51の量を測定して、以下計算式*により胆嚢癌細胞株に対する細胞障害活性を算出した。
(1)ウサギ抗CAPRIN-1モノクローナル抗体#1の作製
抗原タンパク質(ヒトCAPRIN-1)300μgを等量のフロイントの完全アジュバントと混合し、これをウサギ1羽当たりの抗原溶液とした。2回目以降の免疫にはフロインとの不完全アジュバントと混合したものを使用した。抗原溶液を7週齢のウサギの腹腔内に投与後、4週間毎に7回投与を行って免疫を完了した。最後の免疫から4日後に摘出したそれぞれの脾臓を滅菌した2枚のスライドガラスに挟んで擦り潰し、PBS(-)(日水社製)を用いて洗浄し1500rpmで10分間遠心して上清を除去する操作を3回繰り返して脾臓細胞を得た。得られた脾臓細胞とウサギのミエローマ細胞とを5:1の比率にて混和し、そこに37℃に加温した10% FBSを含むIMDM培地200μlとPEG1500(ベーリンガー社製)800μlを混和して調製したPEG溶液を加えて、5分間静置して細胞融合を行った。1700rpmで5分間遠心し、上清を除去後、Gibco社製のHAT溶液を2%当量加えた10% FBSを含むIMDM培地(HAT選択培地)300mlで細胞を懸濁し、96穴プレート(ヌンク社製)の1ウェル当たり100μlずつ、プレート30枚に播種した。7日間、37℃、5% CO2の条件で培養することで、脾臓細胞とウサギミエローマ細胞が融合したハイブリドーマを得た。
上記で取得したウサギ抗CAPRIN-1モノクローナル抗体#1の重鎖可変領域を発現させるための配列番号358に示す遺伝子と、軽鎖可変領域を発現させるための配列番号360に示す遺伝子をそれぞれヒトIgG1の重鎖定常領域が挿入された哺乳類細胞発現用ベクター及びヒトIgG1の軽鎖定常領域が挿入された哺乳類細胞発現用ベクターに挿入した。作製した2つの組み換え発現ベクターを定法に従って哺乳類細胞に導入してヒト化されたヒト-ウサギキメラ抗CAPRIN-1抗体#1を含む培養上清を得た。
(2)で得たヒト-ウサギキメラ抗CAPRIN-1抗体#1の培養上清を定法に従ってHitrap ProteinA SepharoseFF(GEヘルスケア社製)を用いて精製し、PBS(-)に置換して0.22μmのフィルター(ミリポア社製)で濾過したものを用いて、抗原特異性と癌細胞への反応性及び抗腫瘍効果を調べた。
次に、ウサギ抗CAPRIN-1抗体#1のヒト化抗体を作製した。ウサギ抗CAPRIN-1モノクローナル抗体#1の重鎖可変領域のアミノ配列情報を基に、重鎖可変領域中のCDR1~3が配列番号351、配列番号352及び配列番号357のアミノ酸からなり、フレームワーク領域がヒト抗体の配列を含む重鎖可変領域(配列番号363)を発現できるように、配列番号362の塩基配列を設計し、これをヒトIgG1の重鎖定常領域が挿入された哺乳類細胞発現用ベクターに挿入した。同様にして、軽鎖可変領域中のCDR1~3が配列番号354、配列番号355及び配列番号356のアミノ酸からなり、フレームワーク領域がヒト抗体の配列を含む軽鎖可変領域(配列番号365)を発現できるように、配列番号364の塩基配列を設計し、これをヒトIgG1の軽鎖定常領域が挿入された哺乳類細胞発現用ベクターに挿入した。上記2つの組換え発現ベクターを定法に従って哺乳類細胞に導入して、ヒト化抗CAPRIN-1抗体#1を含む培養上清を得た。
上記で得た3種のヒト化抗CAPRIN-1抗体#1~#3のCAPRIN-1に対する反応性を評価した結果、CAPRIN-1タンパク質、配列番号430に示すエピトープペプチド及び胆嚢癌細胞株に対する反応性はヒト-ウサギキメラ抗CAPRIN-1モノクローナル抗体#1と同レベルであった。さらに、これら3種のヒト化抗CAPRIN-1抗体の胆嚢癌細胞株に対する抗腫瘍活性を評価したところ、いずれの抗体もヒト-ウサギキメラ抗CAPRIN-1モノクローナル抗体#1と同レベルの抗腫瘍活性を示した。
次に、WO/2013/018894で得られた配列番号276、277及び278で表されるアミノ酸配列からなる相補性決定領域(それぞれCDR1、CDR2、CDR3)を含む配列番号279で表される重鎖可変領域と配列番号280、281及び282で表されるアミノ酸配列からなる相補性決定領域(それぞれCDR1、CDR2、CDR3)を含む配列番号283で表される軽鎖可変領域からなる抗CAPRIN-1モノクローナル抗体#23、配列番号276、277及び278で表されるアミノ酸配列からなる相補性決定領域(それぞれCDR1、CDR2、CDR3)を含む配列番号279で表される重鎖可変領域と配列番号286、287及び288で表されるアミノ酸配列からなる相補性決定領域(それぞれCDR1、CDR2、CDR3)を含む配列番号289で表される軽鎖可変領域からなる抗CAPRIN-1モノクローナル抗体#24、配列番号291、292及び293で表されるアミノ酸配列からなる相補性決定領域(それぞれCDR1、CDR2、CDR3)を含む配列番号294で表される重鎖可変領域と配列番号295、296及び297で表されるアミノ酸配列からなる相補性決定領域(それぞれCDR1、CDR2、CDR3)を含む配列番号298で表される軽鎖可変領域からなる抗CAPRIN-1モノクローナル抗体#25、WO/2013/018894で得られた配列番号301、302及び303で表されるアミノ酸配列からなる相補性決定領域(それぞれCDR1、CDR2、CDR3)を含む配列番号304で表される重鎖可変領域と配列番号305、306及び307で表されるアミノ酸配列からなる相補性決定領域(それぞれCDR1、CDR2、CDR3)を含む配列番号308で表される軽鎖可変領域からなる抗CAPRIN-1モノクローナル抗体#26、WO/2013/018891で得られた配列番号311、312及び313で表されるアミノ酸配列からなる相補性決定領域(それぞれCDR1、CDR2、CDR3)を含む配列番号314で表される重鎖可変領域と配列番号315、316及び317で表されるアミノ酸配列からなる相補性決定領域(それぞれCDR1、CDR2、CDR3)を含む配列番号318で表される軽鎖可変領域からなる抗CAPRIN-1モノクローナル抗体#27、WO/2013/018889で得られた配列番号321、322及び323で表されるアミノ酸配列からなる相補性決定領域(それぞれCDR1、CDR2、CDR3)を含む配列番号324で表される重鎖可変領域と配列番号325、326及び327で表されるアミノ酸配列からなる相補性決定領域(それぞれCDR1、CDR2、CDR3)を含む配列番号328で表される軽鎖可変領域からなる抗CAPRIN-1モノクローナル抗体#28及びWO/2013/018883で得られた配列番号331、332及び333で表されるアミノ酸配列からなる相補性決定領域(それぞれCDR1、CDR2、CDR3)を含む配列番号334で表される重鎖可変領域と配列番号335、336及び337で表されるアミノ酸配列からなる相補性決定領域(それぞれCDR1、CDR2、CDR3)を含む配列番号338で表される軽鎖可変領域からなる抗CAPRIN-1モノクローナル抗体#29を用いて、実施例10と同様に胆嚢癌細胞株TGBC14TKBについて、その細胞表面上にCAPRIN-1タンパク質が発現しているかどうかを調べたところ、実施例10のマウス抗CAPRIN-1モノクローナル抗体#30~36と同等の胆嚢癌細胞株への反応性が得られた。
実施例11と同様の方法にて実施例15に記載のマウス抗CAPRIN-1抗体#23~29のそれぞれの可変領域を有するヒト-マウスキメラ抗CAPRIN-1抗体#23~29をそれぞれ安定的に産生する細胞株を作製して、ヒト-マウスキメラ抗CAPRIN-1抗体#23~29をそれぞれ含む培養上清を得た。この上清を定法で精製したものを用いて、胆嚢癌細胞に対する抗腫瘍活性を調べた。CAPRIN-1を発現する胆嚢癌細胞に対する細胞障害性の強さを評価するためにヒト-マウスキメラ抗CAPRIN-1抗体#23~29を用いてADCC活性を測定した。実施例12と同様の方法で、胆嚢癌細胞株TGBC14TKBに対するADCC活性を評価した結果、いずれのヒト-マウスキメラ抗CAPRIN-1抗体も胆嚢癌細胞株TGBC14TKBに20%以上の活性を示したのに対して、陰性コントロールとして用いたヒトIgG1抗体では胆嚢癌細胞に対して5%未満の活性であった。
Claims (9)
- 配列番号2~30のうち偶数の配列番号で表されるいずれかのアミノ酸配列又は該アミノ酸配列と80%以上の配列同一性を有するアミノ酸配列、を有するCAPRIN-1タンパク質、又は該タンパク質のアミノ酸配列における連続する7個以上のアミノ酸残基を含むその断片、と免疫学的反応性を有する抗体又はそのフラグメントを有効成分として含むことを特徴とする、胆嚢癌の治療及び/又は予防のための医薬組成物。
- 前記CAPRIN-1タンパク質の断片が、配列番号2~30のうち配列番号6及び配列番号18を除く偶数の配列番号で表されるいずれかのアミノ酸配列中のアミノ酸残基番号233-343、アミノ酸残基番号512-C末端又はアミノ酸残基番号50-98の領域内の連続する7個以上のアミノ酸残基を含むことを特徴とする、請求項1に記載の医薬組成物。
- 前記CAPRIN-1タンパク質の断片が、配列番号267、配列番号429、配列番号428、配列番号273、配列番号266、配列番号270、配列番号272又は配列番号269、配列番号430、配列番号431又は配列番号432で表されるアミノ酸配列、或いは該アミノ酸配列と80%以上の配列同一性を有するアミノ酸配列における連続する7個以上のアミノ酸残基を含むことを特徴とする、請求項1又は2に記載の医薬組成物。
- 前記抗体が、モノクローナル抗体又はポリクローナル抗体である、請求項1~3のいずれか1項に記載の医薬組成物。
- 前記抗体が、ヒト抗体、ヒト化抗体、キメラ抗体、単鎖抗体又は多重特異性抗体である、請求項1~4のいずれか1項に記載の医薬組成物。
- 前記抗体又はそのフラグメントが、以下の(a)~(ao)のいずれかである、請求項1~5のいずれか1項に記載の医薬組成物。
(a)配列番号37,38及び39で表されるアミノ酸配列からなる相補性決定領域(それぞれCDR1、CDR2、CDR3)を含む重鎖可変領域と配列番号41、42及び43で表されるアミノ酸配列からなる相補性決定領域(それぞれCDR1、CDR2、CDR3)を含む軽鎖可変領域とを含む抗体又はそのフラグメント
(b)配列番号47,48及び49で表されるアミノ酸配列からなる相補性決定領域(それぞれCDR1、CDR2、CDR3)を含む重鎖可変領域と配列番号51,52及び53で表されるアミノ酸配列からなる相補性決定領域(それぞれCDR1、CDR2、CDR3)を含む軽鎖可変領域とを含む抗体又はそのフラグメント
(c)配列番号57,58及び59で表されるアミノ酸配列からなる相補性決定領域(それぞれCDR1、CDR2、CDR3)を含む重鎖可変領域と配列番号61,62及び63で表されるアミノ酸配列からなる相補性決定領域(それぞれCDR1、CDR2、CDR3)を含む軽鎖可変領域とを含む抗体又はそのフラグメント
(d)配列番号67,68及び69で表されるアミノ酸配列からなる相補性決定領域(それぞれCDR1、CDR2、CDR3)を含む重鎖可変領域と配列番号71,72及び73で表されるアミノ酸配列からなる相補性決定領域(それぞれCDR1、CDR2、CDR3)を含む軽鎖可変領域とを含む抗体又はそのフラグメント
(e)配列番号77,78及び79で表されるアミノ酸配列からなる相補性決定領域(それぞれCDR1、CDR2、CDR3)を含む重鎖可変領域と配列番号81,82及び83で表されるアミノ酸配列からなる相補性決定領域(それぞれCDR1、CDR2、CDR3)を含む軽鎖可変領域とを含む抗体又はそのフラグメント
(f)配列番号87,88及び89で表されるアミノ酸配列からなる相補性決定領域(それぞれCDR1、CDR2、CDR3)を含む重鎖可変領域と配列番号91,92及び93で表されるアミノ酸配列からなる相補性決定領域(それぞれCDR1、CDR2、CDR3)を含む軽鎖可変領域とを含む抗体又はそのフラグメント
(g)配列番号97,98及び99で表されるアミノ酸配列からなる相補性決定領域(それぞれCDR1、CDR2、CDR3)を含む重鎖可変領域と配列番号101,102及び103で表されるアミノ酸配列からなる相補性決定領域(それぞれCDR1、CDR2、CDR3)を含む軽鎖可変領域とを含む抗体又はそのフラグメント
(h)配列番号107,108及び109で表されるアミノ酸配列からなる相補性決定領域(それぞれCDR1、CDR2、CDR3)を含む重鎖可変領域と配列番号111,112及び113で表されるアミノ酸配列からなる相補性決定領域(それぞれCDR1、CDR2、CDR3)を含む軽鎖可変領域とを含む抗体又はそのフラグメント
(i)配列番号117,118及び119で表されるアミノ酸配列からなる相補性決定領域(それぞれCDR1、CDR2、CDR3)を含む重鎖可変領域と配列番号121,122及び123で表されるアミノ酸配列からなる相補性決定領域(それぞれCDR1、CDR2、CDR3)を含む軽鎖可変領域とを含む抗体又はそのフラグメント
(j)配列番号127,128及び129で表されるアミノ酸配列からなる相補性決定領域(それぞれCDR1、CDR2、CDR3)を含む重鎖可変領域と配列番号121,122及び123で表されるアミノ酸配列からなる相補性決定領域(それぞれCDR1、CDR2、CDR3)を含む軽鎖可変領域とを含む抗体又はそのフラグメント
(k)配列番号132,133及び134で表されるアミノ酸配列からなる相補性決定領域(それぞれCDR1、CDR2、CDR3)を含む重鎖可変領域と配列番号136,137及び138で表されるアミノ酸配列からなる相補性決定領域(それぞれCDR1、CDR2、CDR3)を含む軽鎖可変領域とを含む抗体又はそのフラグメント
(l)配列番号142,143及び144で表されるアミノ酸配列からなる相補性決定領域(それぞれCDR1、CDR2、CDR3)を含む重鎖可変領域と配列番号146,147及び148で表されるアミノ酸配列からなる相補性決定領域(それぞれCDR1、CDR2、CDR3)を含む軽鎖可変領域とを含む抗体又はそのフラグメント
(m)配列番号142,143及び144で表されるアミノ酸配列からなる相補性決定領域(それぞれCDRを含む重鎖可変領域と配列番号152,153及び154で表されるアミノ酸配列からなる相補性決定領域(それぞれCDR1、CDR2、CDR3)を含む軽鎖可変領域とを含む抗体又はそのフラグメント
(n)配列番号157,158及び159で表されるアミノ酸配列からなる相補性決定領域(それぞれCDR1、CDR2、CDR3)を含む重鎖可変領域と配列番号161,162及び163で表されるアミノ酸配列からなる相補性決定領域(それぞれCDR1、CDR2、CDR3)を含む軽鎖可変領域とを含む抗体又はそのフラグメント
(o)配列番号167,168及び169で表されるアミノ酸配列からなる相補性決定領域(それぞれCDR1、CDR2、CDR3)を含む重鎖可変領域と配列番号171,172及び173で表されるアミノ酸配列からなる相補性決定領域(それぞれCDR1、CDR2、CDR3)を含む軽鎖可変領域とを含む抗体又はそのフラグメント
(p)配列番号167,168及び169で表されるアミノ酸配列からなる相補性決定領域(それぞれCDR1、CDR2、CDR3)を含む重鎖可変領域と配列番号177,178及び179で表されるアミノ酸配列からなる相補性決定領域(それぞれCDR1、CDR2、CDR3)を含む軽鎖可変領域とを含む抗体又はそのフラグメント
(q)配列番号167,168及び169で表されるアミノ酸配列からなる相補性決定領域(それぞれCDR1、CDR2、CDR3)を含む重鎖可変領域と配列番号182,183及び184で表されるアミノ酸配列からなる相補性決定領域(それぞれCDR1、CDR2、CDR3)を含む軽鎖可変領域とを含む抗体又はそのフラグメント
(r)配列番号167,168及び169で表されるアミノ酸配列からなる相補性決定領域(それぞれCDR1、CDR2、CDR3)を含む重鎖可変領域と配列番号187,188及び189で表されるアミノ酸配列からなる相補性決定領域(それぞれCDR1、CDR2、CDR3)を含む軽鎖可変領域とを含む抗体又はそのフラグメント
(s)配列番号167,168及び169で表されるアミノ酸配列からなる相補性決定領域(それぞれCDR1、CDR2、CDR3)を含む重鎖可変領域と配列番号192,193及び194で表されるアミノ酸配列からなる相補性決定領域(それぞれCDR1、CDR2、CDR3)を含む軽鎖可変領域とを含む抗体又はそのフラグメント
(t)配列番号197,198及び199で表されるアミノ酸配列からなる相補性決定領域(それぞれCDR1、CDR2、CDR3)を含む重鎖可変領域と配列番号201,202及び203で表されるアミノ酸配列からなる相補性決定領域(それぞれCDR1、CDR2、CDR3)を含む軽鎖可変領域とを含む抗体又はそのフラグメント
(u)配列番号207,208及び209で表されるアミノ酸配列からなる相補性決定領域(それぞれCDR1、CDR2、CDR3)を含む重鎖可変領域と配列番号211,212及び213で表されるアミノ酸配列からなる相補性決定領域(それぞれCDR1、CDR2、CDR3)を含む軽鎖可変領域とを含む抗体又はそのフラグメント
(v)配列番号217,218及び219で表されるアミノ酸配列からなる相補性決定領域(それぞれCDR1、CDR2、CDR3)を含む重鎖可変領域と配列番号221,222及び223で表されるアミノ酸配列からなる相補性決定領域(それぞれCDR1、CDR2、CDR3)を含む軽鎖可変領域とを含む抗体又はそのフラグメント
(w)配列番号227,228及び229で表されるアミノ酸配列からなる相補性決定領域(それぞれCDR1、CDR2、CDR3)を含む重鎖可変領域と配列番号231,232及び233で表されるアミノ酸配列からなる相補性決定領域(それぞれCDR1、CDR2、CDR3)を含む軽鎖可変領域とを含む抗体又はそのフラグメント
(x)配列番号237,238及び239で表されるアミノ酸配列からなる相補性決定領域(それぞれCDR1、CDR2、CDR3)を含む重鎖可変領域と配列番号241,242及び243で表されるアミノ酸配列からなる相補性決定領域(それぞれCDR1、CDR2、CDR3)を含む軽鎖可変領域とを含む抗体又はそのフラグメント
(y)配列番号247,248及び249で表されるアミノ酸配列からなる相補性決定領域(それぞれCDR1、CDR2、CDR3)を含む重鎖可変領域と配列番号251,252及び253で表されるアミノ酸配列からなる相補性決定領域(それぞれCDR1、CDR2、CDR3)を含む軽鎖可変領域とを含む抗体又はそのフラグメント
(z)配列番号276、277及び278で表されるアミノ酸配列からなる相補性決定領域(それぞれCDR1、CDR2、CDR3)を含む重鎖可変領域と配列番号280、281及び282で表されるアミノ酸配列からなる相補性決定領域(それぞれCDR1、CDR2、CDR3)を含む軽鎖可変領域とを含む抗体又はそのフラグメント
(aa)配列番号276、277及び278で表されるアミノ酸配列からなる相補性決定領域(それぞれCDR1、CDR2、CDR3)を含む重鎖可変領域と配列番号286、287及び288で表されるアミノ酸配列からなる相補性決定領域(それぞれCDR1、CDR2、CDR3)を含む軽鎖可変領域とを含む抗体又はそのフラグメント
(ab)配列番号291、292及び293で表されるアミノ酸配列からなる相補性決定領域(それぞれCDR1、CDR2、CDR3)を含む重鎖可変領域と配列番号295、296及び297で表されるアミノ酸配列からなる相補性決定領域(それぞれCDR1、CDR2、CDR3)を含む軽鎖可変領域とを含む抗体又はそのフラグメント
(ac)配列番号301、302及び303で表されるアミノ酸配列からなる相補性決定領域(それぞれCDR1、CDR2、CDR3)を含む重鎖可変領域と配列番号305、306及び307で表されるアミノ酸配列からなる相補性決定領域(それぞれCDR1、CDR2、CDR3)を含む軽鎖可変領域とを含む抗体又はそのフラグメント
(ad)配列番号311、312及び313で表されるアミノ酸配列からなる相補性決定領域(それぞれCDR1、CDR2、CDR3)を含む重鎖可変領域と配列番号315、316及び317で表されるアミノ酸配列からなる相補性決定領域(それぞれCDR1、CDR2、CDR3)を含む軽鎖可変領域とを含む抗体又はそのフラグメント
(ae)配列番号321、322及び323で表されるアミノ酸配列からなる相補性決定領域(それぞれCDR1、CDR2、CDR3)を含む重鎖可変領域と配列番号325、326及び327で表されるアミノ酸配列からなる相補性決定領域(それぞれCDR1、CDR2、CDR3)を含む軽鎖可変領域とを含む抗体又はそのフラグメント
(af)配列番号331、332及び333で表されるアミノ酸配列からなる相補性決定領域(それぞれCDR1、CDR2、CDR3)を含む重鎖可変領域と配列番号335、336及び337で表されるアミノ酸配列からなる相補性決定領域(それぞれCDR1、CDR2、CDR3)を含む軽鎖可変領域とを含む抗体又はそのフラグメント
(ag)配列番号341、342及び343で表されるアミノ酸配列からなる相補性決定領域(それぞれCDR1、CDR2、CDR3)を含む重鎖可変領域と配列番号345、346及び347で表されるアミノ酸配列からなる相補性決定領域(それぞれCDR1、CDR2、CDR3)を含む軽鎖可変領域とを含む抗体又はそのフラグメント
(ah)配列番号351、352及び353で表されるアミノ酸配列からなる相補性決定領域(それぞれCDR1、CDR2、CDR3)を含む重鎖可変領域と配列番号354、355及び356で表されるアミノ酸配列からなる相補性決定領域(それぞれCDR1、CDR2、CDR3)を含む軽鎖可変領域とを含む抗体又はそのフラグメント
(ai)配列番号351、352及び357で表されるアミノ酸配列からなる相補性決定領域(それぞれCDR1、CDR2、CDR3)を含む重鎖可変領域と配列番号354、355及び356で表されるアミノ酸配列からなる相補性決定領域(それぞれCDR1、CDR2、CDR3)を含む軽鎖可変領域とを含む抗体又はそのフラグメント
(aj)配列番号373、374及び375で表されるアミノ酸配列の相補性決定領域(それぞれCDR1、CDR2、CDR3)を含む重鎖可変領域と配列番号377、378及び379で表されるアミノ酸配列の相補性決定領域(それぞれCDR1、CDR2、CDR3)を含む軽鎖可変領域とを含む抗体又はそのフラグメント
(ak)配列番号383、384及び385で表されるアミノ酸配列の相補性決定領域(それぞれCDR1、CDR2、CDR3)を含む重鎖可変領域と配列番号387、388及び389で表されるアミノ酸配列の相補性決定領域(それぞれCDR1、CDR2、CDR3)を含む軽鎖可変領域とを含む抗体又はそのフラグメント
(al)配列番号393、394及び395で表されるアミノ酸配列の相補性決定領域(それぞれCDR1、CDR2、CDR3)を含む重鎖可変領域と配列番号387、388及び389で表されるアミノ酸配列の相補性決定領域(それぞれCDR1、CDR2、CDR3)を含む軽鎖可変領域とを含む抗体又はそのフラグメント
(am)配列番号398、399及び400で表されるアミノ酸配列からなる相補性決定領域(それぞれCDR1、CDR2、CDR3)を含む重鎖可変領域と配列番号402、403及び404で表されるアミノ酸配列からなる相補性決定領域(それぞれCDR1、CDR2、CDR3)を含む軽鎖可変領域とを含む抗体又はそのフラグメント
(an)配列番号408、409及び410の相補性決定領域(それぞれCDR1、CDR2、CDR3)を含む重鎖可変領域と配列番号412、413及び414の相補性決定領域(それぞれCDR1、CDR2、CDR3)を含む軽鎖可変領域とを含む軽鎖可変領域とを含む抗体又はそのフラグメント
(ao)配列番号418、419及び420の相補性決定領域(それぞれCDR1、CDR2、CDR3)を含む重鎖可変領域と配列番号422、423及び424の相補性決定領域(それぞれCDR1、CDR2、CDR3)を含む軽鎖可変領域とを含む軽鎖可変領域とを含む抗体又はそのフラグメント - 前記抗体又はそのフラグメントが、抗腫瘍剤とコンジュゲートされている、請求項1~6のいずれか1項に記載の医薬組成物。
- 請求項1~7のいずれか1項に記載の医薬組成物と、抗腫瘍剤を含む医薬組成物とを組み合わせて含む、組み合わせ医薬品。
- 請求項1~7のいずれか1項に記載の医薬組成物又は請求項8に記載の組み合わせ医薬品を被験者に投与することを含む、胆嚢癌の治療及び/又は予防方法。
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JP2013522419A JP6107655B2 (ja) | 2012-03-30 | 2013-03-29 | 胆嚢癌の治療及び/又は予防用医薬組成物 |
EP13769665.4A EP2832366B1 (en) | 2012-03-30 | 2013-03-29 | Pharmaceutical composition for treatment and/or prevention of gallbladder cancer |
US14/389,078 US9428581B2 (en) | 2012-03-30 | 2013-03-29 | Pharmaceutical composition for treatment and/or prevention of gallbladder cancer |
CA2869123A CA2869123C (en) | 2012-03-30 | 2013-03-29 | Pharmaceutical composition comprising anti-caprin-1 antibodies for the treatment of gallbladder cancer |
RU2014143784A RU2649802C2 (ru) | 2012-03-30 | 2013-03-29 | Фармацевтическая композиция для лечения и/или предотвращения рака желчного пузыря |
DK13769665.4T DK2832366T3 (en) | 2012-03-30 | 2013-03-29 | PHARMACEUTICAL COMPOSITION FOR TREATMENT AND / OR PREVENTION OF Gallbladder cancer |
BR112014024209A BR112014024209A2 (pt) | 2012-03-30 | 2013-03-29 | composição farmacêutica, agente farmacêutico e método de tratamento e/ou prevenção de cancêr da vesicula biliar |
ES13769665.4T ES2656501T3 (es) | 2012-03-30 | 2013-03-29 | Composición farmacéutica para el tratamiento y/o la prevención de cáncer de vesícula biliar |
AU2013241043A AU2013241043B2 (en) | 2012-03-30 | 2013-03-29 | Pharmaceutical composition for treatment and/or prevention of gall bladder cancer |
KR1020147026642A KR102052400B1 (ko) | 2012-03-30 | 2013-03-29 | 담낭암의 치료 및/또는 예방용 의약 조성물 |
PL13769665T PL2832366T3 (pl) | 2012-03-30 | 2013-03-29 | Kompozycja farmaceutyczna do leczenia i/lub zapobiegania rakowi pęcherzyka żółciowego |
MX2014011274A MX357965B (es) | 2012-03-30 | 2013-03-29 | Composicion farmaceutica para el tratamiento y/o prevencion de cancer de vesicula biliar. |
CN201380017568.8A CN104203281B (zh) | 2012-03-30 | 2013-03-29 | 胆囊癌的治疗和/或预防用药物组合物 |
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EP2832366A1 (en) | 2015-02-04 |
PT2832366T (pt) | 2018-01-25 |
KR102052400B1 (ko) | 2019-12-06 |
CA2869123A1 (en) | 2013-10-03 |
DK2832366T3 (en) | 2018-01-22 |
AU2013241043B2 (en) | 2017-11-09 |
EP2832366B1 (en) | 2017-11-08 |
AU2013241043A1 (en) | 2014-10-09 |
BR112014024209A2 (pt) | 2018-04-10 |
US20150299314A1 (en) | 2015-10-22 |
KR20150002618A (ko) | 2015-01-07 |
CA2869123C (en) | 2021-03-16 |
MX2014011274A (es) | 2014-10-06 |
ES2656501T3 (es) | 2018-02-27 |
EP2832366A4 (en) | 2015-10-21 |
MX357965B (es) | 2018-08-01 |
RU2014143784A (ru) | 2016-05-27 |
JP6107655B2 (ja) | 2017-04-05 |
CN104203281B (zh) | 2019-07-26 |
US9428581B2 (en) | 2016-08-30 |
JPWO2013147176A1 (ja) | 2015-12-14 |
RU2649802C2 (ru) | 2018-04-04 |
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