WO2021251459A1 - ヒト化抗gpc-1抗体 - Google Patents
ヒト化抗gpc-1抗体 Download PDFInfo
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- WO2021251459A1 WO2021251459A1 PCT/JP2021/022085 JP2021022085W WO2021251459A1 WO 2021251459 A1 WO2021251459 A1 WO 2021251459A1 JP 2021022085 W JP2021022085 W JP 2021022085W WO 2021251459 A1 WO2021251459 A1 WO 2021251459A1
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K16/00—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies
- C07K16/18—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies against material from animals or humans
- C07K16/28—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies against material from animals or humans against receptors, cell surface antigens or cell surface determinants
- C07K16/30—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies against material from animals or humans against receptors, cell surface antigens or cell surface determinants from tumour cells
- C07K16/303—Liver or Pancreas
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- A—HUMAN NECESSITIES
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- 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
- A61K47/6801—Drug-antibody or immunoglobulin conjugates defined by the pharmacologically or therapeutically active agent
- A61K47/6803—Drugs conjugated to an antibody or immunoglobulin, e.g. cisplatin-antibody conjugates
- A61K47/68031—Drugs conjugated to an antibody or immunoglobulin, e.g. cisplatin-antibody conjugates the drug being an auristatin
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- 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
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- A61K47/6859—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 the tumour determinant being from liver or pancreas cancer cell
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- 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
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- 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
- A61K47/6875—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 being a hybrid immunoglobulin
- A61K47/6877—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 being a hybrid immunoglobulin the antibody being an immunoglobulin containing regions, domains or residues from different species
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- 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
- A61K47/6889—Conjugates wherein the antibody being the modifying agent and wherein the linker, binder or spacer confers particular properties to the conjugates, e.g. peptidic enzyme-labile linkers or acid-labile linkers, providing for an acid-labile immuno conjugate wherein the drug may be released from its antibody conjugated part in an acidic, e.g. tumoural or environment
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K16/00—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies
- C07K16/18—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies against material from animals or humans
- C07K16/28—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies against material from animals or humans against receptors, cell surface antigens or cell surface determinants
- C07K16/2803—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies against material from animals or humans against receptors, cell surface antigens or cell surface determinants against the immunoglobulin superfamily
- C07K16/2818—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies against material from animals or humans against receptors, cell surface antigens or cell surface determinants against the immunoglobulin superfamily against CD28 or CD152
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- A61K2039/505—Medicinal preparations containing antigens or antibodies comprising antibodies
- A61K2039/507—Comprising a combination of two or more separate antibodies
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- 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
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K2317/00—Immunoglobulins specific features
- C07K2317/70—Immunoglobulins specific features characterized by effect upon binding to a cell or to an antigen
- C07K2317/77—Internalization into the cell
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K2317/00—Immunoglobulins specific features
- C07K2317/90—Immunoglobulins specific features characterized by (pharmaco)kinetic aspects or by stability of the immunoglobulin
- C07K2317/92—Affinity (KD), association rate (Ka), dissociation rate (Kd) or EC50 value
Definitions
- the present disclosure relates to humanized antibodies that specifically bind to Glypican-1 (GPC-1), as well as related techniques, methods, drugs, and the like.
- GPC-1 Glypican-1
- Glypican-1 molecule is significantly more strongly expressed in esophageal cancer cells than in normal cells and can be used as a tumor marker (Patent Document 1).
- an antibody that specifically binds to Glypican-1 has also been isolated (Patent Document 1).
- the present disclosure provides a humanized anti-GPC-1 monoclonal antibody having high affinity for GPC-1 and high internalizing activity in GPC-1 positive cells.
- No humanized anti-GPC-1 antibody has been developed so far, and it has not been predicted that the humanized anti-GPC-1 antibody will have high activity.
- the antibodies of the present disclosure can be used for a variety of therapeutic uses.
- the present disclosure also provides a composition for preventing or treating Glypican-1 positive cancer, which comprises a complex of a humanized anti-GPC-1 monoclonal antibody and a drug having cytotoxic activity. do.
- Such an antibody or a fragment thereof can be applied as a companion diagnostic agent and a targeted treatment or personalized medicine in combination with a companion diagnostic agent.
- (Item 1) A humanized anti-GPC-1 antibody or an antigen-binding thereof humanized based on an antibody containing a heavy chain variable region having the amino acid sequence set forth in SEQ ID NO: 5 and a light chain variable region having the amino acid sequence set forth in SEQ ID NO: 6.
- the humanized antibody or its antigen-binding fragment (A) contains heavy chain CDRs 1-3 having the amino acid sequences set forth in SEQ ID NOs: 28-30, respectively, or (b) 3 or less amino acid substitutions, deletions and / or in heavy chain CDRs 1-3 in (a).
- the composition according to item 1. (Item 3) The humanized antibody or its antigen-binding fragment (A) contains light chain CDR1 to CDR3 having the amino acid sequences set forth in SEQ ID NOs: 31 to 33, respectively, or (b) contains light chain CDR1 to CDR3 having the amino acid sequences set forth in SEQ ID NOs: 34 to 36, respectively.
- the humanized antibody or antigen-binding fragment thereof according to item 1 or 2.
- (Item 6) The humanized antibody or antigen-binding fragment thereof according to any one of Items 1 to 5, which comprises a light chain variable region having an amino acid sequence selected from the group consisting of the amino acid sequences set forth in SEQ ID NOs: 8 to 27.
- (Item 7) The humanization according to any one of items 1 to 6, comprising a light chain variable region having an amino acid sequence that is at least 90% identical to the amino acid sequence selected from the group consisting of the amino acid sequences set forth in SEQ ID NOs: 8 to 17.
- the humanized antibody or antigen-binding fragment thereof according to any one of Items 1 to 7, which comprises a light chain variable region having an amino acid sequence selected from the group consisting of the amino acid sequences set forth in SEQ ID NOs: 8 to 17.
- the antibody binds to Glypican-1 at 1.02E -8 following a K D based on the analysis by surface plasmon resonance, the humanized antibody or antigen binding fragment thereof according to any one of items 1-9.
- (Item 11) A pharmaceutical composition for intracellular transfer of an active ingredient, which comprises the humanized antibody according to any one of items 1 to 10 or an antigen-binding fragment thereof.
- (Item 12) A complex of a humanized antibody according to any one of items 1 to 10 or an antigen-binding fragment thereof and a drug having cytotoxic activity.
- (Item 13) 12 The complex of item 12, wherein the humanized antibody or antigen-binding fragment thereof is operably linked to the cytotoxic agent via a linker.
- the drug having cytotoxic activity comprises monomethyl auristatin E (MMAE), monomethyl auristatin F (MMAF), DM1, DM4, calikeamycin, duocarmycin, pyrolobenzodiazepine (PBD), and a topoisomerase inhibitor.
- MMAE monomethyl auristatin E
- MMAF monomethyl auristatin F
- DM1, DM4 calikeamycin
- duocarmycin pyrolobenzodiazepine
- PBD pyrolobenzodiazepine
- a topoisomerase inhibitor a topoisomerase inhibitor.
- the complex according to item 12 or 13 selected from the group.
- the complex according to item 13 or 14, wherein the agent having cytotoxic activity is cell membrane permeability.
- Item 16 The complex according to any one of items 13 to 15, wherein the agent having cytotoxic activity is selected from MMAE, PBD, Eribulin, SN-38, Dxd, and DM4.
- (Item 17) The complex according to any one of items 13 to 16, wherein the linker is selected from the group consisting of an enzyme-cleaving linker, an acid instability linker, and a disulfide linker.
- (Item 18) The complex according to any one of items 13 to 17, wherein the linker is a cleavage-type linker cleaved by cathepsin B.
- (Item 19) The complex, in Glypican-1-positive cells, indicating an IC 50 of less than about 0.1 nM, composite according to any one of items 12-18.
- (Item 20) A composition for preventing or treating Glypican-1 positive cancer, which comprises the complex according to any one of items 12 to 19.
- the Glypican-1 positive cancers include esophageal cancer, pancreatic cancer, bile duct cancer, cervical cancer, lung cancer, head and neck cancer, breast cancer, uterine leiomyosarcoma, prostate cancer, oral squamous epithelial cancer or 20.
- CAF cancer-related fibroblasts
- (Item 26) A composition for preventing or treating metastatic cancer of Glypican-1 positive cancer, which comprises the complex according to any one of items 12 to 19.
- the Glypican-1 positive cancers include esophageal cancer, pancreatic cancer, bile duct cancer, cervical cancer, lung cancer, head and neck cancer, breast cancer, uterine leiomyosarcoma, prostate cancer, and oral squamous epithelial cancer. 26.
- the composition according to item 26 which is selected from any combination thereof.
- (Item 28) The composition according to item 26 or 27, wherein the metastatic cancer is a metastatic cancer of pancreatic cancer.
- the metastatic cancer is metastatic cancer that has spread to the liver, esophagus, bile duct, cervix, lung, head and neck, breast, uterine smooth muscle, prostate, oral squamous epithelium, brain, bone, peritoneum, or adrenal gland.
- the composition according to any one of items 26 to 28.
- (Item 2A) A method for preventing or treating Glypican-1 positive cancer in a subject, comprising the step of administering to the subject the complex according to any one of items 12-19.
- the Glypican-1 positive cancers include esophageal cancer, pancreatic cancer, bile duct cancer, cervical cancer, lung cancer, head and neck cancer, breast cancer, uterine leiomyosarcoma, prostate cancer, oral squamous epithelial cancer or The method of item 2A, selected from any combination of these.
- Item 5A The method according to any one of items 2A to 4A, wherein the cancer has cancer-related fibroblasts (CAF).
- (Item 6A) The method according to any one of items 2A to 5A, further comprising the step of administering an immune checkpoint inhibitor.
- (Item 7A) The method of item 6A, wherein the immune checkpoint inhibitor is an anti-PD-1 antibody.
- (Item 8A) A method for preventing or treating metastatic cancer of Glypican-1 positive cancer in a subject, comprising the step of administering to the subject the complex according to any one of items 12 to 19.
- the Glypican-1 positive cancers include esophageal cancer, pancreatic cancer, bile duct cancer, cervical cancer, lung cancer, head and neck cancer, breast cancer, uterine leiomyosarcoma, prostate cancer, and oral squamous epithelial cancer.
- the metastatic cancer is metastatic cancer that has spread to the liver, esophagus, bile duct, cervix, lung, head and neck, breast, uterine smooth muscle, prostate, oral squamous epithelium, brain, bone, peritoneum, or adrenal gland.
- (Item 1B) Use of the humanized antibody or antigen-binding fragment thereof according to any one of items 1 to 10 in the manufacture of a pharmaceutical agent for intracellular transfer of an active ingredient.
- the Glypican-1 positive cancers include esophageal cancer, pancreatic cancer, bile duct cancer, cervical cancer, lung cancer, head and neck cancer, breast cancer, uterine leiomyosarcoma, prostate cancer, oral squamous epithelial cancer or Use according to item 2B, selected from any combination of these.
- (Item 5B) The use according to any one of items 2B to 4B, wherein the cancer has cancer-related fibroblasts (CAF).
- (Item 6B) The use according to any one of items 2B-5B, wherein the complex is administered with an immune checkpoint inhibitor.
- (Item 7B) The use according to item 6B, wherein the immune checkpoint inhibitor is an anti-PD-1 antibody.
- (Item 8B) Use of the complex according to any one of items 12 to 19 in the manufacture of a pharmaceutical agent for preventing or treating metastatic cancer of Glypican-1 positive cancer in a subject.
- the Glypican-1 positive cancers include esophageal cancer, pancreatic cancer, bile duct cancer, cervical cancer, lung cancer, head and neck cancer, breast cancer, uterine leiomyosarcoma, prostate cancer, and oral squamous epithelial cancer. Or the use according to item 8B, selected from any combination of these.
- the metastatic cancer is metastatic cancer that has spread to the liver, esophagus, bile duct, cervix, lung, head and neck, breast, uterine smooth muscle, prostate, oral squamous epithelium, brain, bone, peritoneum, or adrenal gland. Use according to any one of items 8B to 10B.
- the humanized antibody or antigen-binding fragment thereof according to any one of items 1 to 10 for intracellular transfer of the active ingredient.
- the complex according to any one of items 12 to 19, for preventing or treating Glypican-1 positive cancer in a subject.
- the Glypican-1 positive cancers include esophageal cancer, pancreatic cancer, bile duct cancer, cervical cancer, lung cancer, head and neck cancer, breast cancer, uterine leiomyosarcoma, prostate cancer, oral squamous epithelial cancer or The complex according to item 2C, which is selected from any combination of these.
- Item 5C The complex according to any one of items 2C to 4C, wherein the cancer has cancer-related fibroblasts (CAF).
- the Glypican-1 positive cancers include esophageal cancer, pancreatic cancer, bile duct cancer, cervical cancer, lung cancer, head and neck cancer, breast cancer, uterine leiomyosarcoma, prostate cancer, and oral squamous epithelial cancer.
- the complex according to item 8C selected from any combination thereof.
- the metastatic cancer is metastatic cancer that has spread to the liver, esophagus, bile duct, cervix, lung, head and neck, breast, uterine smooth muscle, prostate, oral squamous epithelium, brain, bone, peritoneum, or adrenal gland.
- a humanized anti-Glypican-1 antibody that is clinically applicable is provided.
- Such an antibody can be used as a detection agent used for diagnosis and companion treatment of Glypican-1 positive cancer, and further, a complex of the antibody and a drug can be used for treatment of Glypican-1 positive cancer. It is extremely effective for.
- FIG. 1 shows a Biacore equilibrium dissociation constant of the 20 clones was determined by (TM) (K D).
- FIG. 2 shows a schematic diagram of the ADC assay of Example 2.
- FIG. 3 shows the results of cytotoxic activity (IC 50 ) of 20 clones in the TE14 cell line.
- FIG. 4 shows the results of antigen affinity analysis by FACS of anti-GPC-1 chimeric antibody (01a033) and clone T2.
- FIG. 5 shows a schematic diagram of an exemplary ADC structure.
- FIG. 6 shows a schematic diagram of the setting of Drug-to-Antibody Ratio (DAR).
- FIG. 7 shows the results of antigen affinity analysis by FACS of humanized GPC1-ADC and unlabeled antibody.
- FIG. 8 shows the results of an intracellular internalization assay for humanized anti-GPC-1 antibody (clone T2) and humanized GPC1-ADC (MMAE).
- Green indicates GPC1 staining
- red indicates CD107a staining
- blue indicates DAPI staining.
- the scale shows 10 ⁇ m.
- the left bar of each group in the graph indicates 4 ° C and the right bar indicates 37 ° C.
- FIG. 9 shows the results of GPC1 expression analysis by FACS in various cell lines.
- FIG. 10 shows the results of an in vitro ADC assay using humanized GPC1-ADC (MMAE).
- FIG. 11 shows the results of GPC1 expression analysis and ADC assay in HeLa, Detroit562, FaDu cell lines.
- FIG. 12 shows the results of GPC1 expression analysis and ADC assay in Ho-1-u-1, KOSC2 cl3-43, and KON cell lines.
- FIG. 13 shows the results of an in vivo drug efficacy test of humanized GPC1-ADC (MMAE) using pancreatic cancer PDX (PK565) having heterogeneous GPC1 expression.
- MMAE humanized GPC1-ADC
- PK565 pancreatic cancer PDX
- FIG. 14 shows the results of an in vivo drug efficacy test of humanized GPC1-ADC (MMAE) using pancreatic cancer PDX (PK175) in which GPC1 is expressed in both cancer cells and CAF.
- Body weight increased slightly in humanized GPC1-ADC (10 mg / kg) and humanized GPC1-ADC (3 mg / kg).
- Tumor volume decreased and was the smallest in humanized GPC1-ADC (10 mg / kg), slightly increased in humanized GPC1-ADC (3 mg / kg), followed by humanized GPC-ADC (1 mg / kg) and Vehicle.
- the control gradually increased, and the Vehicle control was the largest.
- FIG. 14 shows the results of an in vivo drug efficacy test of humanized GPC1-ADC (MMAE) using pancreatic cancer PDX (PK175) in which GPC1 is expressed in both cancer cells and CAF.
- FIG. 15 shows the results of an in vivo drug efficacy test of humanized GPC1-ADC (MMAE) using esophageal cancer PDX (ESCC14) in which GPC1 is uniformly highly expressed. Body weight did not fluctuate significantly in either group. Tumor volume was comparable and smallest in humanized GPC1-ADC (10 mg / kg) and humanized GPC1-ADC (3 mg / kg), followed by humanized GPC-ADC (1 mg / kg), which remained almost unchanged. , Vehicle control gradually increased.
- FIG. 16 shows the results of GPC1 expression analysis and ADC assay in a mGPC1 forced expression mouse colon cancer cell line (mGPC1-MC38).
- FIG. 17 shows the quantitative results of HMGB-1 in the culture supernatant by ELISA.
- FIG. 18 shows the results of the antitumor effect of the combined use of humanized GPC1-ADC (MMAE) and anti-PD1 antibody using colorectal cancer syngenic model mice. Body weight did not fluctuate significantly in either group. Tumor volume is the smallest in humanized GPC1-ADC (10 mg / kg) + anti-PD1 Ab (3 mg / kg), anti-PD1 Ab (3 mg / kg), humanized GPC1-ADC (10 mg / kg), Vehicle control. It became larger in the order of. FIG.
- FIG. 19 shows the measurement results of a G2 / M phase cell cycle marker (phospho-Histone H3 (Ser10)) in pancreatic cancer PDX (PK565).
- the scale bar indicates 100 ⁇ m.
- FIG. 20 shows the analysis results of GPC1 expression by immunohistochemical staining in pancreatic cancer distant metastatic tissue.
- the scale bar indicates 100 ⁇ m.
- FIG. 21 shows an outline of preparation of a pancreatic cancer liver metastasis model and a drug efficacy test using humanized GPC1-ADC. i. v. Administration was performed on days 0, 3, 7, and 10. IVIS measurements were performed on days 0, 7, 14, 21, 21, 28, 35, 42 and 49.
- FIG. 22 shows the results of a drug efficacy test using humanized GPC1-ADC in a pancreatic cancer liver metastasis model.
- PBS administration group: n 13
- GPC1-ADC 10 mg / kg administration group: n 10, *: p ⁇ 0.05, **: p ⁇ 0.01.
- Glypican-1 glycosylphosphatidylinositol (GPI) anchored cell surface proteoglycans, and have heparan sulfate. It is a thing. It has been implicated in cell adhesion, migration, lipoprotein metabolism, growth factor activity regulation and blood coagulation inhibition. It is said to bind to several fibroblast growth factors (FGFs) such as FGF-1, FGF-2 and FGF-7. Glypican-1 is said to function as an extracellular chaperone of VEGF165 and help restore the ability to bind receptors after oxidation.
- FGFs fibroblast growth factors
- Glypican-1 is registered with UniProt as accession number P35052 (see http://www.uniprot.org/uniprot/P35052), and in NCBI, NP_002072.2 (precursor amino acid sequence). In NM_002081.2. All of these are information that can be used herein, and that information is incorporated herein by reference. For Glypican-1, David G et al. , J Cell Biol.
- the nucleic acid sequence (full length) of human Glypican-1 is represented by SEQ ID NO: 1, and the amino acid sequence is represented by SEQ ID NO: 2.
- the nucleic acid sequence (overall length) of mouse Glypican-1 is represented by SEQ ID NO: 3, and the amino acid sequence is represented by SEQ ID NO: 4.
- Glypican-1 As used herein, “Glypican-1", “GPC-1” or “GPC1” may be assigned to a particular sequence number or accession number as long as it meets the specific purposes of the present disclosure. Not only the protein having the amino acid sequence described (or the nucleic acid encoding it), but also its functionally active analogs or derivatives, or its functionally active fragments, or homologues thereof, or high stringency conditions. Alternatively, it is understood that, under low stringency conditions, a nucleic acid-encoded variant that hybridizes to the nucleic acid encoding this protein can also be used in the present disclosure.
- derivatives are preferably not intended to be limiting, but are substantially relative to the protein of interest (eg, Glypican-1, antibody).
- Such molecules include, in various embodiments, sequences that are aligned over amino acid sequences of the same size or by a computer homology program known in the art. At least 30%, 40%, 50%, 60%, 70%, 80%, 90%, 95%, 96%, 97%, 98% or 99% identical or such molecules.
- the encoding nucleic acid is capable of hybridizing to a sequence encoding a component protein under (highly) stringent, moderately stringent, or non-stringent conditions.
- Glypican-1 chimpanzees (K7B6W5), lizards (Maca mulatta) (F6VPW9), mice (Mus mammals) (Q9QZF2), rats (Rattus53) , Glypican-1 protein is known to be expressed in many non-human animals such as Rattus norvegicus (F1P150). Therefore, these animals, especially mammals, are also within the scope of the present disclosure. It is understood to enter.
- the functional domain of Glypican-1 eg, the extracellular domain (about 500 amino acids, containing 12 cysteine residues) and the C-terminal hydrophobic region (GPI-anchor domain) are conserved. Is preferable.
- protein protein
- polypeptide oligopeptide
- peptide refers to a polymer of amino acids of any length.
- the polymer may be linear, branched or cyclic.
- the amino acid may be natural or non-natural, or may be a modified amino acid.
- the term may also include those assembled into a complex of multiple polypeptide chains.
- the term also includes naturally or artificially modified amino acid polymers. Such modifications include, for example, disulfide bond formation, glycosylation, lipidation, acetylation, phosphorylation or any other manipulation or modification (eg, conjugation with a labeling component).
- amino acid is a general term for organic compounds having an amino group and a carboxyl group.
- amino acid sequence may be chemically modified.
- any amino acid in the amino acid sequence may form a salt or a solvate.
- any amino acid in the amino acid sequence may be L-type or D-type.
- the protein according to the embodiment of the present disclosure contains the above-mentioned "specific amino acid sequence”.
- Chemical modifications that amino acids contained in proteins undergo in vivo include, for example, N-terminal modification (eg, acetylation, myristoylation, etc.), C-terminal modification (eg, amidation, glycosylphosphatidylinositol addition, etc.), or side chain. Modifications (eg, phosphorylation, sugar chain addition, etc.) are known. Amino acids may be natural or non-natural as long as they meet the purposes of the present disclosure.
- polynucleotide As used herein, "polynucleotide”, “oligonucleotide” and “nucleic acid” are used interchangeably herein to refer to a polymer of nucleotides of any length. The term also includes “oligonucleotide derivatives" or “polynucleotide derivatives”. The "oligonucleotide derivative” or “polynucleotide derivative” refers to an oligonucleotide or polynucleotide containing a derivative of a nucleotide or having an unusual bond between nucleotides, and is used interchangeably.
- oligonucleotide examples include, for example, 2'-O-methyl-ribonucleotide, an oligonucleotide derivative in which a phosphate diester bond in an oligonucleotide is converted into a phosphorothioate bond, and a phosphate diester bond in an oligonucleotide.
- oligonucleotide derivative in which cytosine in the oligonucleotide is replaced with C-5 propynyl citosine
- oligo An oligonucleotide derivative in which cytosine in a nucleotide is replaced with phenoxazine-modified cytosine, an oligonucleotide derivative in which ribose in DNA is replaced with 2'-O-propylribose, and ribose in an oligonucleotide is 2.
- nucleic acid sequences are also conservatively modified variants (eg, degenerate codon substitutions) and complementary sequences, as are the expressly indicated sequences. Is intended to be included.
- the degenerate codon substituent creates a sequence in which the third position of one or more selected (or all) codons is replaced with a mixed base and / or deoxyinosine residue.
- nucleic acid is also used interchangeably with genes, cDNAs, mRNAs, oligonucleotides, and polynucleotides.
- nucleotide may be natural or non-natural.
- the "gene” refers to a factor that defines a genetic trait, and the “gene” may refer to a "polynucleotide", an “oligonucleotide”, and a “nucleic acid”.
- homology of a gene means the degree of identity of two or more gene sequences to each other, and generally, having “homology” means a high degree of identity or similarity. Say. Therefore, the higher the homology of two genes, the higher the identity or similarity of their sequences. Whether or not the two genes have homology can be examined by direct sequence comparison or, in the case of nucleic acids, hybridization methods under stringent conditions. When directly comparing two gene sequences, the DNA sequences are typically at least 50% identical, preferably at least 70% identical, and more preferably at least 80%, 90%. , 95%, 96%, 97%, 98% or 99% are homologous.
- a “homologous” or “homologous gene product” is a protein in another species, preferably a mammal, that exerts the same biological functions as the protein components of the complex further described herein. Means. Such homologues are also sometimes referred to as “ortholog gene products.” It is understood that such homologues, homologous gene products, ortholog gene products and the like can also be used as long as they meet the purposes of the present disclosure.
- Amino acids can be referred to herein by either their generally known three-letter symbols or the one-letter symbols recommended by the IUPAC-IUB Biochemical Nomenclature Communication. Nucleotides can also be referred to by the generally recognized one-letter code.
- comparisons of amino acid and base sequence similarity, identity and homology are calculated using default parameters using BLAST, a tool for sequence analysis.
- the identity search can be performed using, for example, NCBI's BLAST 2.2.28 (issued 2013.4.2).
- the value of identity in the present specification is usually the value when the above BLAST is used and aligned under the default conditions. However, if a higher value is obtained by changing the parameter, the highest value is used as the identity value. When identity is evaluated in multiple regions, the highest value among them is set as the identity value. Similarity is a numerical value that takes into account similar amino acids in addition to identity.
- “90% or more” may be, for example, 90, 95, 96, 97, 98, 99, or 100% or more, and is within the range of any two of them. May be good.
- the above-mentioned "homology” may be calculated by calculating the ratio of the number of amino acids homologous in an amino acid sequence between two or a plurality of amino acids according to a method known in the art. Before calculating the ratio, the amino acid sequences of the amino acid sequences to be compared are aligned, and a gap is introduced in a part of the amino acid sequence if necessary for maximizing the ratio of the same amino acid.
- the term "functional equivalent” refers to any entity that has the same target function but a different structure with respect to the original entity of interest.
- the functional equivalent of "Glypican-1" or its antibody is not Glypican-1 or its antibody itself, but in variants or variants of Glypican-1 or its antibodies (eg, amino acid sequence variants, etc.). It has the biological action of Glypican-1 or its antibody, and at the time of action, it changes to Glypican-1 or its antibody itself or a variant or variant of this Glypican-1 or its antibody.
- Can include eg, including nucleic acids encoding Glypican-1 or its antibodies themselves or variants or variants of Glypican-1 or its antibodies, and vectors, cells, etc.
- Glypican-1 or an antibody thereof can be used in the same manner as Glypican-1 or an antibody thereof, without particular mention.
- Functional equivalents can be found by searching databases and the like.
- searching means finding another nucleobase sequence having a specific function and / or property by utilizing one nucleobase sequence electronically, biologically, or by other methods.
- BLAST Altschul et al., J. Mol. Biol. 215: 403-410 (1990)
- FASTA Pearson & Lipman, Proc. Natl. Acad.
- Bio searches include stringent hybridization, macroarrays with genomic DNA attached to nylon membranes or the like, or microarrays (microarray assays) attached to glass plates, PCR and in situ hybridization, and the like. Not limited. As used herein, it is intended that the genes used in the present disclosure should also include the corresponding genes identified by such electronic and biological searches.
- one or more amino acids inserted, substituted or deleted, or added to one or both ends of the amino acid sequence can be used.
- "insertion, substitution or deletion of one or more amino acids in an amino acid sequence, or addition to one or both ends” is a well-known technical technique such as a site-specific mutagenesis method. It means that the modification has been made by a method or by a natural mutation, such as by substituting a plurality of amino acids that can occur naturally.
- the modified amino acid sequence may include, for example, 1 to 30, preferably 1 to 20, more preferably 1 to 9, still more preferably 1 to 5, particularly preferably 1 to 2 amino acids inserted, substituted, or missing. It can be lost, or added to one or both ends.
- the modified amino acid sequence is preferably an amino acid sequence in which the amino acid sequence has one or more (preferably one or several or 1, 2, 3, or 4) conservative substitutions in the Glypican-1 amino acid sequence. May be.
- conservative substitution means substituting one or more amino acid residues with another chemically similar amino acid residue so as not to substantially alter the function of the protein. For example, there is a case where one hydrophobic residue is replaced with another hydrophobic residue, a case where one polar residue is replaced with another polar residue having the same charge, and the like. Functionally similar amino acids capable of making such substitutions are known in the art for each amino acid.
- non-polar (hydrophobic) amino acids such as alanine, valine, isoleucine, leucine, proline, tryptophan, phenylalanine, and methionine.
- polar (neutral) amino acid examples include glycine, serine, threonine, tyrosine, glutamine, asparagine, and cysteine.
- positively charged (basic) amino acids examples include arginine, histidine, lysine and the like.
- negatively charged (acidic) amino acids include aspartic acid and glutamic acid.
- the "anti-Glypican-1 antibody” comprises an antibody having binding to Glypican-1.
- the method for producing this anti-Glypican-1 antibody is not particularly limited, and for example, Glypican-1 may be produced by immunizing mammals or birds.
- An "antigen-binding fragment" of an anti-Glypican-1 antibody refers to a fragment of an antibody that retains its ability to bind Glypican-1.
- antigen-binding fragments include, but are not limited to, single chain antibodies, scFv, Fab fragments, F (ab') 2 fragments, and the like.
- the antibody class of the anti-Glypican-1 antibody according to one embodiment of the present disclosure is not particularly limited, but may be, for example, IgM, IgD, IgG, IgA, IgE, or IgY.
- the anti-Glypican-1 antibody according to one embodiment of the present disclosure may be an antibody fragment having an antigen-binding activity (hereinafter, may be referred to as an “antigen-binding fragment”). In this case, there are effects such as increased stability or antibody production efficiency.
- the anti-Glypican-1 antibody may be a fusion protein.
- This fusion protein may be one in which a polypeptide or oligopeptide is bound to the N- or C-terminal of the anti-Glypican-1 antibody.
- the oligopeptide may be a His tag.
- the anti-Glypican-1 antibody according to one embodiment of the present disclosure may be, for example, an antibody obtained through a step of immunizing an organism with a purified Glypican-1, Glypican-1 expressing cell, or a Glypican-1 containing lipid membrane. good. From the viewpoint of enhancing the therapeutic effect on Glypican-1 positive cancer, it is preferable to use Glypican-1 expressing cells for immunity.
- the anti-Glypican-1 antibody is an antibody having a CDR set of an antibody obtained through a step of immunizing an organism with purified Glypican-1, Glypican-1 expressing cells or a lipid membrane containing Glypican-1. May be. From the viewpoint of enhancing the therapeutic effect on Glypican-1 positive cancer, it is preferable to use Glypican-1 expressing cells for immunity.
- the CDR set is a set of heavy chain CDRs 1, 2, and 3, and light chain CDRs 1, 2, and 3.
- the "Glypican-1 expressing cell” may be obtained, for example, by introducing a polynucleotide encoding Glypican-1 into a cell and then expressing Glypican-1.
- Glypican-1 contains a Glypican-1 fragment.
- the "Glypican-1 containing lipid membrane” may be obtained, for example, by mixing Glypican-1 and a lipid bilayer membrane.
- Glypican-1 contains a Glypican-1 fragment.
- the anti-Glypican-1 antibody according to one embodiment of the present disclosure is an antibody obtained through a step of immunizing a chicken with an antigen, or a CDR set of the antibody, from the viewpoint of enhancing the therapeutic effect on Glypican-1 positive cancer.
- Antibodies with are preferred.
- the anti-Glypican-1 antibody of the present disclosure may have any binding force as long as the object is achieved.
- the anti-Glypican-1 antibody of the present disclosure may have internalization activity and / or ADC activity even if it has a low affinity for Glypican-1.
- the KD value (kd / ka) is 1.0 ⁇ 10-7 (M) or less, 1.0 ⁇ 10-8 (M) or less, 1.0 ⁇ 10-9 (M) or less, or 1.0. It can be x10-10 (M) or less.
- the binding force of the anti-Glypican-1 antibody for diagnostic or companion reagent purposes is 1.0 ⁇ 10-8 (M) or less in KD value (kd / ka).
- the anti-Glypican-1 antibody may be an antibody that binds to a wild type or a variant of Glypican-1. Mutants include those due to differences in DNA sequences between individuals.
- the amino acid sequence of wild-type or mutant Glypican-1 is preferably 80% or more, more preferably 90% or more, more preferably 95% or more, and particularly preferably 98% or more with respect to the amino acid sequence shown in SEQ ID NO: 2. Has the homology of.
- an "antibody” includes a molecule or a population thereof capable of specifically binding to a specific epitope on an antigen.
- Antibodies can exist in various forms, eg, full-length antibodies (antibodies with Fab and Fc regions), Fv antibodies, Fab antibodies, F (ab') 2 antibodies, Fab'antibodies, diabody, single.
- Chain (single chain) antibody eg, scFv), sc (Fv) 2 (single chain (Fv) 2), scFv-Fc, dsFv, multivalent specific antibody (eg, oligo-specific antibody, bivalent specific antibody) ), Diabodies, antigen-binding peptides or polypeptides, chimeric antibodies (eg, mouse-human chimeric antibodies, chicken-human chimeric antibodies, etc.), mouse antibodies, chicken antibodies, humanized antibodies, human antibodies, or their equivalents. It may be one or more forms selected from the group consisting of (or equivalents).
- Antibodies also include antibody-modified or antibody-unmodified products. The antibody modification may have an antibody bound to various molecules such as polyethylene glycol.
- the antibody modification can be obtained by chemically modifying the antibody using a known method. Further, such an antibody may be covalently linked or recombinantly fused to an enzyme such as alkaline phosphatase, horseradish peroxidase, alpha-galactosidase, or the like.
- the anti-Glypican-1 antibody used in the present disclosure may bind to the Glypican-1 protein, regardless of its origin, type, shape, or the like. Specifically, known antibodies such as non-human animal antibodies (eg, mouse antibodies, rat antibodies, camel antibodies), human antibodies, chimeric antibodies, humanized antibodies and the like can be used.
- the binding of the antibody to the Glypican-1 protein is preferably a specific binding.
- Antibodies also include antibody-modified or antibody-unmodified products.
- the antibody modification may have an antibody bound to various molecules such as polyethylene glycol.
- the antibody modification can be obtained by chemically modifying the antibody using a known method.
- a "monoclonal antibody” is an antibody corresponding to substantially a single epitope, except for antibodies in which the individual antibodies constituting the population have mutations that can occur spontaneously in small amounts. Including the case where. Alternatively, the individual antibodies that make up the population may be substantially identical, except for antibodies that have mutations that can occur spontaneously in small amounts. Monoclonal antibodies are highly specific and differ from conventional polyclonal antibodies, which typically contain different antibodies corresponding to different epitopes. In addition to its specificity, monoclonal antibodies are useful in that they can be synthesized from hybridoma cultures that are not contaminated with other immunoglobulins.
- the description "monoclonal” may indicate that it is obtained from a substantially homogeneous population of antibodies, but does not imply that the antibody must be produced in any particular way.
- the monoclonal antibody may be prepared by the same method as the hybridoma method described in "Kohler G, Milstein C., Nature. 1975 August 7; 256 (5517): 495-497.”.
- the monoclonal antibody may be prepared by a method similar to the recombinant method described in US Pat. No. 4,816,567.
- the monoclonal antibody is "Clackson et al., Nature. 1991 Aug 15; 352 (6336): 624-628.”, Or "Marks et al., J MolBiol.
- any method known in the art can be used, and for example, the following can be exemplified as the construction of a typical mass production system for antibodies and antibody production. That is, CHO cells are transfected with an H-chain antibody expression vector and an L-chain antibody expression vector, cultured using the selective reagents G418 and Zeocin, and cloned by the limiting dilution method. After cloning, clones expressing the antibody stably are selected by the ELISA method. The selected CHO cells are expanded and cultured, and the culture supernatant containing the antibody is collected. Antibodies can be purified from the collected culture supernatant by purifying Protein A or Protein G.
- the humanized antibody of the present disclosure can be obtained as a polyclonal fully human antibody by immunizing a human antibody-producing mouse with an antigen of interest, from which a monoclonal state can be obtained before use in the present disclosure.
- a "humanized antibody” comprises, for example, one or more CDRs derived from a non-human species, a framework region (FR) derived from human immunoglobulin, and a constant region derived from human immunoglobulin. It is an antibody that binds to a desired antigen. Humanization of the antibody can be performed using various techniques known in the art (Almagro et al., Front Bioscii. 2008 Jan 1; 13: 1619-1633.). For example, CDR graphing (Ozaki et al., Blood. 1999 Jun 1; 93 (11): 3922-3930.), Re-surfing (Roguska et al., Proc Natl Acad Sci US A.
- FR shuffle Damscroder et al., Mol Immunol. 2007 Apr; 44 (11): 3049-3060. Epub 2007 Jan 22.
- amino acid residues in the human FR region may be replaced with the corresponding residues from the CDR donor antibody. This FR substitution can be carried out by a method well known in the art (Riechmann et al., Nature. 1988 Mar 24; 332 (6162): 323-327.).
- FR residues important for antigen binding may be identified by modeling the interaction between CDRs and FR residues.
- sequence comparison may be used to identify anomalous FR residues at specific positions.
- humanized antibodies may be produced as described in the production examples of the present disclosure. Specifically, it may be screened from a heavy chain-fixed V ⁇ library in which the CDRs of non-human-derived antibodies are graphed into the human heavy chain framework. In this method of humanization, the heavy chain CDR is unchanged, but the light chain CDR can.
- a "heavy chain” is typically the main component of a full-length antibody. Heavy chains are usually attached to light chains by disulfide and non-covalent bonds. In the domain on the N-terminal side of the heavy chain, there is a region called a variable region (VH) in which the amino acid sequence is not constant even for the same type of antibody of the same class, and in general, VH has a large specificity and affinity for an antigen. It is known to contribute. For example, when a VH-only molecule was prepared in "Reiter et al., J Mol Biol. 1999 Jul 16; 290 (3): 685-98.”, It was specifically bound to the antigen with high affinity. Is described. Furthermore, in “Wolfson W, Chem Biol. 2006 Dec; 13 (12): 1243-1244.”, It is found that among camel antibodies, only heavy chain antibodies having no light chain are present. Has been described.
- a "CDR (complementarity determining region)" is a region of an antibody that actually contacts an antigen to form a binding site.
- the CDRs are located on the Fv of the antibody, which includes the variable region: heavy chain variable region (VH) and light chain variable region (VL).
- CDRs include CDR1, CDR2, and CDR3 consisting of about 5 to 30 amino acid residues.
- the heavy chain CDR contributes to the binding of the antibody to the antigen.
- CDR3 has the highest contribution to the binding of the antibody to the antigen.
- the antibody binding ability was increased by modifying the heavy chain CDR3.
- the Fv region other than the CDR is called the framework region (FR), which consists of FR1, FR2, FR3 and FR4, and is relatively well conserved among the antibodies (Kabat et al., "Sequence of Proteins of Immunological Interest”. US Dept. Health and Human Services, 1983.). That is, it can be said that the factor that characterizes the reactivity of the antibody lies in the CDR, and in particular, the heavy chain CDR.
- the definition of Kabat (Sequences of Properties of Imperial Interest, 5th ed., Public Health Service, National Institutes of Health, National Institutes of Health, Bethesda, Bethesda, I. ., 1987; 196: 901-917) may be adopted.
- the definition of Kabat is adopted as a preferred example, but is not necessarily limited to this.
- the determination may be made in consideration of both the definition of Kabat and the definition of Chothia. It can also be a CDR.
- the term "antigen” refers to any substrate that can be specifically bound by an antibody molecule.
- immunogen refers to an antigen capable of initiating lymphocyte activation that produces an antigen-specific immune response.
- epitope or "antigen determinant” refers to a site in an antigen molecule to which an antibody or lymphocyte receptor binds. Methods of determining epitopes are well known in the art, and such epitopes can be determined by one of ordinary skill in the art when the primary sequence of nucleic acid or amino acid is provided. It is understood that the antibodies of the present disclosure can be similarly utilized even with antibodies having other sequences as long as the epitopes are the same.
- the antibody used in the present specification may be any specific antibody as long as false positives are reduced.
- “Cancer” covered by this disclosure includes lung cancer, esophageal cancer, stomach cancer, liver cancer, pancreatic cancer, kidney cancer, adrenal cancer, biliary tract cancer, breast cancer, colon cancer, small bowel cancer, etc.
- ovarian cancer includes, for example, ovarian serous adenocarcinoma, or ovarian clear cell line cancer.
- Uterine cancer includes, for example, endometrial cancer, or cervical cancer.
- Head and neck cancers include, for example, oral cancer, pharyngeal cancer, laryngeal cancer, nasal cavity cancer, sinus cancer, salivary adenocarcinoma, or thyroid cancer.
- Lung cancer includes, for example, non-small cell lung cancer or small cell lung cancer.
- the malignant tumor may be PD-L1 positive.
- Esophageal cancer is used in a normal sense and is used in a broad sense including cancer in the esophagus.
- Esophageal cancer includes, but is not limited to, squamous cell carcinoma, adenocarcinoma, and lymph node metastasis site. It is understood that about half of Japanese esophageal cancers occur near the center of the esophagus in the chest, and then 1/4 occur in the lower part of the esophagus. ..
- this disclosure can be used as an indicator of esophageal cancer as a whole, including squamous cell carcinoma, adenocarcinoma, and lymph node metastasis sites.
- pancreatic cancer refers to a malignant tumor originating from the pancreas, but generally refers to pancreatic duct cancer, and also includes tumors of other parts of the pancreas.
- cervical cancer is a type of cervical cancer, and cervical cancer includes cervical cancer and uterine body cancer, and cervical cancer is the cervical region at the entrance of the uterus. It is generated from the part called.
- lung cancer is a malignant tumor derived from epithelial cells that develops in the lung, and includes small cell lung cancer and non-small cell lung cancer.
- Non-small cell lung cancer includes adenocarcinoma, squamous cell carcinoma, and the like. I have large cell carcinoma.
- head and neck cancer is a tumor of the head and neck, and refers to a tumor formed in a part from the face to the neck, for example, a part such as the nose, mouth, throat, upper chin, lower chin, and ears. ..
- breast cancer is a tumor that occurs in the breast, and includes ductal cancer, lobular cancer, and the like.
- uterine leiomyosarcoma refers to uterine sarcoma formed in the smooth muscle of the uterus among uterine sarcomas. Uterine leiomyosarcoma can be histologically diagnosed by cell density, cell division count, cell atypia, and the presence or absence of coagulative necrosis of tumor cells.
- prostate cancer refers to a tumor that forms in the prostate.
- oral squamous epithelial cancer is a type of oral cancer and refers to a tumor formed in the epithelium of the oral mucosa.
- cholangiocarcinoma is a tumor that develops in the bile duct, including intrahepatic cholangiocarcinoma that occurs in the bile duct inside the liver, hilar region cholangiocarcinoma that occurs in the hilar region outside the liver, and liver. It is classified as a distal cholangiocarcinoma that occurs in the outer distal part.
- cancer-assisted fibroblasts refers to fibroblasts constituting the interstitium of cancer.
- CAF produces a lot of extracellular matrix such as collagen, which makes the interstitium of cancer very hard, and as a result, the blood vessels are crushed (collapse), so that the anticancer drug is efficient. Prevents penetration. The crushing of blood vessels also induces hypoxia in the cancerous tissue and further increases the malignancy of the cancer cells.
- the increase in interstitial hardness itself is one of the factors that increase the growth and infiltration ability of cancer cells (the ability to spread to surrounding tissues).
- CAF produces many growth factors that act on cancer cells to promote their growth and infiltration and suppress the antitumor immune response.
- a cancer "interstitium” is a tissue that surrounds cancer cells in a cancer tissue and contains CAF as a major constituent, and other constituents include immune cells and bone marrow-derived cells.
- Tumor refers to tissue containing blood vessels, lymph vessels, extracellular matrix produced by CAF, and the like.
- subject refers to an organism subject to the diagnosis, detection, or treatment of the present disclosure (for example, an organism such as a human being, cells taken from an organism, blood, serum, etc.). ..
- sample refers to any substance obtained from a subject or the like, and includes, for example, serum or the like. Those skilled in the art can appropriately select a preferable sample based on the description in the present specification.
- drug As used herein, “drug”, “drug” or “factor” (both of which correspond to agents in English) are used interchangeably in a broad sense and as long as the intended purpose can be achieved. It may also be a substance or other element (eg, energy such as light, radioactivity, heat, electricity). Such substances include, for example, proteins, polypeptides, oligopeptides, peptides, polynucleotides, oligonucleotides, nucleotides, nucleic acids (eg, cDNA, DNA such as genomic DNA, RNA such as mRNA), poly.
- cDNA DNA such as genomic DNA
- RNA such as mRNA
- Substances that bind to Glypican-1 can also be such agents.
- Factors specific to a polynucleotide typically include polynucleotides that are complementary to the sequence of the polynucleotide with certain sequence homology (eg, 70% or more sequence identity). Examples include, but are not limited to, polypeptides such as transcription factors that bind to the promoter region.
- Factors specific to a polypeptide typically include an antibody or derivative thereof or an analog thereof (eg, a single chain antibody) specifically directed to the polypeptide, wherein the polypeptide is a receptor.
- an antibody or derivative thereof or an analog thereof eg, a single chain antibody
- the polypeptide is a receptor.
- a specific ligand or receptor in the case of a ligand, a substrate thereof when the polypeptide thereof is an enzyme, and the like can be mentioned, but the present invention is not limited thereto.
- diagnosis identifies various parameters associated with a disease, disorder, condition (eg, esophageal cancer), etc. in a subject and determines the current or future of such disease, disorder, condition. To do.
- condition within the body can be investigated and such information can be used to formulate a disease, disorder, condition, treatment to be administered or prophylaxis in the subject.
- various parameters such as a method can be selected.
- diagnosis in a narrow sense means diagnosing the current state, but broadly includes “early diagnosis”, “predictive diagnosis”, “preliminary diagnosis” and the like.
- the diagnostic method of the present disclosure is industrially useful because it can be used from the body and can be carried out without the hands of medical personnel such as doctors.
- "predictive diagnosis, pre-diagnosis or diagnosis” may be particularly referred to as "support” in order to clarify that it can be carried out without the hands of medical personnel such as doctors.
- the term "detective agent (agent)” or “test agent (agent)” means any agent that can detect or inspect a target object in a broad sense.
- the "diagnostic agent (agent)” means any agent capable of diagnosing a target condition (for example, a disease such as esophageal cancer) in a broad sense.
- treatment refers to a disease or disorder (eg, esophageal cancer) that, in the event of such a condition, prevents the exacerbation of such disease or disorder, preferably maintains the status quo. More preferably, it refers to alleviation, more preferably withdrawal, and includes the ability to exert a symptom-improving effect or a preventive effect on a patient's disease or one or more symptoms associated with the disease. Diagnosis in advance and appropriate treatment is called “companion treatment”, and the diagnostic agent for that purpose is sometimes called “companion diagnostic agent”.
- the "therapeutic agent (drug)” means any drug that can treat a target condition (for example, a disease such as esophageal cancer) in a broad sense.
- the "therapeutic agent” may be a pharmaceutical composition comprising an active ingredient and one or more pharmacologically acceptable carriers.
- the pharmaceutical composition can be produced, for example, by mixing the active ingredient with the above carrier and using any method known in the technical field of pharmaceutics.
- the therapeutic agent is not limited in the form of use as long as it is used for treatment, and may be an active ingredient alone or a mixture of an active ingredient and an arbitrary ingredient.
- the shape of the carrier is not particularly limited, and may be, for example, a solid or a liquid (for example, a buffer solution).
- the therapeutic agent for esophageal cancer includes a drug (preventive agent) used for prevention of esophageal cancer or an agent for suppressing the growth of esophageal cancer cells.
- prevention means to prevent a certain disease or disorder (for example, esophageal cancer) from becoming such a condition before it becomes such a condition.
- the agents of the present disclosure can be used to make a diagnosis, and if necessary, the agents of the present disclosure can be used to prevent, for example, esophageal cancer, or to take preventive measures.
- the "preventive drug (drug)” means any drug that can prevent a target condition (for example, a disease such as esophageal cancer) in a broad sense.
- interaction refers to two substances, such as an intermolecular force (Van der Waals force), a hydrogen bond, or a hydrophobic interaction between one substance and the other substance. Etc.). Normally, the two substances that interact with each other are in an associated or bound state. The detection, testing and diagnosis of the present disclosure can be achieved utilizing such interactions.
- detection or “quantification” of polynucleotide or polypeptide expression includes, for example, binding or interaction of a mRNA to a detection agent, test agent or diagnostic agent (including application as a companion reagent). It can be achieved using appropriate methods, including measurement and immunological measurement methods. Examples of the molecular biological measurement method include Northern blotting, dot blotting, PCR and the like. Examples of immunological measurement methods include ELISA method using a microtiter plate, RIA method, immunofluorescence method, luminescence immunoassay (LIA), immunoprecipitation method (IP), immunodiffusion method (SRID), and immunity.
- DNA arrays are widely outlined in (Shujunsha ed., Cell Engineering Separate Volume "DNA Microarrays and Latest PCR Methods"). For protein arrays, see Nat Genet. It is described in detail in 2002 Dec; 32 Supplement: 526-532.
- the method for analyzing gene expression includes, but is not limited to, RT-PCR, RACE method, SCSP method, immunoprecipitation method, two-hybrid system, and invitro translation.
- RT-PCR RT-PCR
- RACE method RACE method
- SCSP method immunoprecipitation method
- two-hybrid system two-hybrid system
- invitro translation Such further analytical methods are described, for example, in the Genome Analysis Experimental Method / Yusuke Nakamura Lab Manual, edited by Yusuke Nakamura Yodosha (2002), and all of these descriptions are incorporated herein by reference. Will be done.
- “reduction” or “suppression” of an activity, expression product eg, protein, transcript (RNA, etc.)
- a synonym thereof is a reduction in the quantity, quality or effect of a particular activity, transcript or protein. , Or the activity to reduce.
- “disappearing” out of the decrease it means that the activity, expression product, etc. are below the detection limit, and in particular, it may be called “disappearing”.
- “disappearance” is included in “decrease” or “suppression”.
- the term "label” refers to an entity (eg, substance, energy, electromagnetic wave, etc.) for identifying a molecule or substance of interest from others.
- a labeling method include an RI (radioisotope) method, a fluorescence method, a biotin method, a chemiluminescence method and the like.
- the markers of the present disclosure or a plurality of factors or means for capturing the markers are labeled by the fluorescence method, the labels are labeled with fluorescent substances having different fluorescence maximum wavelengths. The difference in the maximum wavelength of fluorescence emission is preferably 10 nm or more.
- Alexa TM Fluor is a water-soluble fluorescent dye obtained by modifying coumarin, rhodamine, fluorescein, cyanine, etc., and is a series that supports a wide range of fluorescent wavelengths. It is stable, bright, and has low pH sensitivity.
- Examples of the combination of fluorescent dyes having a maximum fluorescence wavelength of 10 nm or more include a combination of Alexa TM 555 and Alexa TM 633, a combination of Alexa TM 488 and Alexa TM 555, and the like.
- any one that can bind to the base portion thereof can be used, but cyanine dyes (for example, Cy3, Cy5, etc. of CyDyeTM series), rhodamine 6G reagent, 2-acetylaminofluorene (AAF). ), AAIF (iodine derivative of AAF) and the like are preferably used.
- the fluorescent substance having a difference in fluorescence emission maximum wavelength of 10 nm or more include a combination of Cy5 and Rhodamine 6G reagent, a combination of Cy3 and fluorescein, a combination of Rhodamine 6G reagent and fluorescein, and the like.
- such a label can be used to modify an object of interest so that it can be detected by the detection means used. Such modifications are known in the art and those skilled in the art can optionally implement such methods depending on the label and the subject of interest.
- in vivo refers to the inside of a living body. In a particular context, “in vivo” refers to the location where the substance of interest should be placed.
- in vitro refers to a state in which a part of a living body is removed or released “in vitro” (for example, in vitro) for various research purposes. A term that contrasts with in vivo.
- ex vivo refers to a series of actions that are performed outside the body but are intended to be returned to the body afterwards for a certain procedure. Also in the present disclosure, it is possible to envision an embodiment in which cells in a living body are treated with the agent of the present disclosure and returned to a patient again.
- kits are a unit that is usually divided into two or more sections and is provided with parts to be provided (for example, a test drug, a diagnostic drug, a therapeutic drug, an antibody, a label, a manual, etc.).
- the form of this kit is preferred when the purpose is to provide a composition such that it should not be mixed and provided for stability and the like, and it is preferable to mix and use immediately before use.
- kits are preferably instructions or instructions describing how to use the provided parts (eg, test agents, diagnostic agents, therapeutic agents, or how reagents should be treated).
- the kit When the kit is used as a reagent kit in the present specification, the kit usually includes an instruction manual or the like that describes how to use a test drug, a diagnostic drug, a therapeutic drug, an antibody, or the like. Is included.
- the "instruction” describes the method of using this disclosure to a doctor or another user.
- This instruction sheet contains words instructing the detection method of the present disclosure, how to use a diagnostic agent, or administration of a medicine or the like.
- the instruction sheet may include words instructing administration to the esophagus (for example, by injection) orally as the administration site.
- This instruction is prepared and approved by the regulatory agency of the country in which this disclosure is implemented (eg, Ministry of Health, Labor and Welfare in Japan, Food and Drug Administration (FDA) in the United States, etc.). It is clearly stated that it has been received.
- the instruction sheet is a so-called package insert, which is usually provided in a paper medium, but is not limited thereto, and is in the form of, for example, an electronic medium (for example, a homepage provided on the Internet, an e-mail). But can be provided.
- intracellular transfer refers to a substance in which a cell binds to an antigen by endocytosis or phagocytosis via a substance bound to the antigen on the cell surface.
- a substance that binds to Glypian-1 having such activity causes the target active ingredient to be intracellularly transferred to cells expressing Glypian-1 on the cell surface, thereby achieving the desired effect.
- the desired effect of the ingredients can be produced in Glypian-1 expressing cells.
- the active ingredient of interest include, but are not limited to, agents having cytotoxic activity, anticancer agents, contrast agents, siRNA, antisense nucleic acids, ribozymes and the like.
- the term "complex” means any construct that includes two or more parts.
- the other portion may be a polypeptide and may be other substances (eg, sugars, lipids, nucleic acids, other hydrocarbons, low molecular weight compounds, etc.).
- two or more portions constituting the complex may be bonded by covalent bonds or other bonds (for example, hydrogen bonds, ionic bonds, hydrophobic interactions, van der Waals forces, etc.). It may have been done. Therefore, as used herein, the term "complex” includes molecules formed by linking a plurality of molecules such as polypeptides, nucleic acids, lipids, sugars, and low molecular weight compounds. It was
- linker refers to a molecule that connects at least two components and spatially separates them. Examples of the linker include, but are not limited to, an enzyme-cleaving linker, an acid instability linker, and a disulfide linker.
- Enzyme-cleaving linker refers to a linker that is cleaved by an enzyme present in the cell.
- Acid-instability linker refers to a linker that is cleaved under conditions of intracellular endosome or lysosome production.
- disulfide linker refers to a linker that is cleaved in an intracellular reducing environment.
- the term "antibody drug conjugate (ADC)” refers to an antibody or an antigen-binding fragment thereof that is chemically linked to one or more active ingredients of interest.
- the ADC is operably linked via a linker.
- “operably linked” refers to a relationship in which the linked components can be actuated to perform their function.
- the target active ingredient that may be contained in the ADC includes, but is not limited to, a drug having cytotoxic activity, an anticancer agent, a contrast agent, siRNA, an antisense nucleic acid, a ribozyme, and the like.
- What can be used as a linker may be a cleaved linker or a non-cleavable linker.
- the cleaved linker include, but are not limited to, a linker having a cleavage sequence by a proteolytic enzyme, an acid instability linker, and a disulfide linker.
- the non-cleavable linker include, but are not limited to, an MCC linker.
- cell-damaging activity refers to, for example, causing pathological changes in cells, not only direct trauma, but also DNA cleavage, base dimer formation, chromosomal cleavage, and cell division. It refers to causing cell death by directly or indirectly blocking the function of cells due to any structural or functional damage to the cells such as system damage or decreased activity of various enzymes. Therefore, examples of the "drug having cytotoxic activity” include, but are not limited to, alkylating agents, tumor necrosis factor inhibitors, intercalators, microtubule inhibitors, kinase inhibitors, proteasome inhibitors, and topoisomerase inhibitors. Agents and the like can be mentioned.
- IC 50 50% inhibitory concentration
- affinity refers to the equilibrium constant for the reversible binding of, represented by the equilibrium dissociation constant (K D value).
- the equilibrium dissociation constant can be measured by surface plasmon resonance (SPR) methods, such as Biacore®. In addition, it may be measured by MP-SPR Navi TM (BioNavis), OpenPlex (Horiba), Smart SPR (RIBM).
- SPR surface plasmon resonance
- the K D values indicated unless otherwise specified, it refers to a value measured by surface plasmon resonance (SPR) method.
- the present disclosure is humanized based on an antibody comprising a heavy chain variable region having the amino acid sequence set forth in SEQ ID NO: 5 and a light chain variable region having the amino acid sequence set forth in SEQ ID NO: 6.
- An anti-GPC-1 antibody or an antigen-binding fragment thereof is provided.
- the inventors of the present invention are 01a033 (sequence), which is an anti-GPC-1 mouse monoclonal antibody having a high affinity for GPC-1 disclosed in International Publication No. 2018/199318 (incorporated herein by reference).
- the humanized antibody of the present disclosure is GPC-1 as compared with an antibody containing a heavy chain variable region having the amino acid sequence set forth in SEQ ID NO: 5 and a light chain variable region having the amino acid sequence set forth in SEQ ID NO: 6. Can have a high affinity for.
- the antibodies of the present disclosure or antigen-binding fragments thereof are the amino acid sequence set forth in SEQ ID NO: 7, or at least about 90%, at least about 95%, at least about 96%, at least about 97% of the amino acid sequence thereof. It may contain heavy chain variable regions having at least about 98%, or at least about 99%, identical amino acid sequences.
- the antibodies of the present disclosure or antigen-binding fragments thereof are amino acid sequences selected from the group consisting of the amino acid sequences set forth in SEQ ID NOs: 8-27, or at least about 90%, at least about 95% thereof. , At least about 96%, at least about 97%, at least about 98%, or at least about 99% may contain a light chain variable region having the same amino acid sequence.
- the antibody or antigen-binding fragment thereof of the present disclosure is an amino acid sequence selected from the group consisting of the amino acid sequences set forth in SEQ ID NOs: 8 to 17, or at least about 90%, at least about 95%, at least. It may contain about 96%, at least about 97%, at least about 98%, or at least about 99% light chain variable regions having the same amino acid sequence.
- the antibodies of the present disclosure may be of any class, eg, IgM, IgD, IgG, IgA, IgE, or IgY.
- the antibodies of the present disclosure can be IgG.
- the antibody of the present disclosure is a subclass selected from the group consisting of human IgG1, human IgG2, human IgG3, and human IgG4, preferably human IgG4.
- Human IgG4 is known to undergo a reaction (Fab-arm exchange) in which the H chain of human IgG4 exchanges with another human IgG4 (https://www.nature.com/articles/nrneph.2015.95/figures). / 2).
- an S228P mutation can be inserted (J Biol Chem. 2015 Feb 27; 290 (9): 5462-9.).
- OPDIVOR nivolumab
- KEYTRUDAR pembrolizumab
- dupilumab has the amino acid residue at position 233 of the H chain replaced with Pro. Since Fab-arm exchange does not occur in classes other than human IgG4, it is not necessary to include amino acid mutations.
- the antibodies of the present disclosure are the amino acid sequence set forth in SEQ ID NO: 91, or at least about 90%, at least about 95%, at least about 96%, at least about 97%, at least about 98% of the amino acid sequence. Alternatively, it may contain a heavy chain constant region having at least about 99% identical amino acid sequence. In some embodiments, the antibodies of the present disclosure have the amino acid arrangement set forth in SEQ ID NO: 92, or at least about 90%, at least about 95%, at least about 96%, at least about 97%, at least about 98%, and the amino acids. Alternatively, it may contain a light chain constant region having at least about 99% identical amino acid sequence.
- CDRs 1-3 of the heavy chain variable region may have the amino acid sequences set forth in SEQ ID NOs: 28-30, respectively.
- the light chain variable regions CDR1-3 are SEQ ID NOs: 31-33, respectively, or SEQ ID NOs: 34-36, respectively, or SEQ ID NOs: 37-39, respectively, or SEQ ID NOs: 40-42, respectively.
- the light chain variable regions CDR1-3 are SEQ ID NOs: 31-33, respectively, or SEQ ID NOs: 34-36, respectively, or SEQ ID NOs: 37-39, respectively, or SEQ ID NOs: 40-42, respectively, or SEQ ID NOs, respectively.
- the epitope of the antibody or antigen-binding fragment thereof of the present disclosure may comprise positions 339-358 and / or 388-421 of SEQ ID NO: 2 (full-length sequence of human GPC-1). In certain embodiments, the epitopes of the antibodies of the present disclosure may comprise positions 339-358 and 388-421 of SEQ ID NO: 2 (full-length sequence of human GPC-1).
- the antibodies or antigen-binding fragments thereof of the present disclosure are about 5 ⁇ 10 -9 M, about 6 ⁇ 10 -9 M, about 7 ⁇ 10 -9 M, about 8 ⁇ 10 -9 M, about 9 ⁇ 10 -9 M, about 10 -8 M or less, about 2 ⁇ 10 -8 M, about 3 ⁇ 10 -8 M, about 4 ⁇ 10 -8 M, about 5 ⁇ 10 -8 M, about 10 - 7 M or capable of binding to Glypican-1 at approximately 5 ⁇ 10 -7 M affinity (K D value).
- an antibody or antigen-binding fragment thereof of the present disclosure, linked to Glypican-1 at 3.16 ⁇ 10 -8 M or an affinity of about 1.02 ⁇ 10 -8 M (K D value) obtain.
- the present disclosure provides a pharmaceutical composition for intracellular translocation of an active ingredient, comprising the humanized antibody of the present disclosure or an antigen-binding fragment thereof.
- the antibodies of the present disclosure unexpectedly have intracellular translocation (internalization) activity equal to or higher than 01a033.
- the present disclosure provides a complex of the humanized antibody of the present disclosure or an antigen-binding fragment thereof and an agent having cytotoxic activity.
- Drugs with cytotoxic activity can be operably linked to a humanized antibody or antigen-binding fragment thereof via a linker.
- Drugs with cytotoxic activity include monomethyl auristatin E (MMAE), monomethyl auristatin F (MMAF), DM1, DM4, calikeamycin, duocarmycin, pyrolobenzodiazepines (PBD), and topoisomerase inhibitors.
- MMAE monomethyl auristatin E
- MMAF monomethyl auristatin F
- agents having cytotoxic activity are preferably those having a bystander effect.
- Bystander refers to the effect that a drug released in a cancer cell permeates the cell membrane and is effective against surrounding cancer cells. Therefore, in some embodiments, the agent having cytotoxic activity can be cell permeable.
- the drug having a cytotoxic activity having a bystander effect include, but are not limited to, MMAE, PBD, Eribulin, SN-38
- the linker may be one that is cleaved in cancer cells, and examples thereof include enzyme-cleaving linkers, acid instability linkers, and disulfide linkers.
- the linker can be a truncated linker cleaved by a cathepsin (eg, cathepsin B), such as maleimide caproyl-valine-citrulline-p-aminobenzyloxycarbonyl.
- the complex of the present disclosure is about 0.04 nM or less, about 0.05 nM or less, about 0.06 nM or less, about 0.07 nM or less, about 0.08 nM or less in Glypican-1 positive cells. , About 0.09 nM or less, about 0.1 nM or less, about 0.11 nM or less, about 0.12 nM or less, about 0.13 nM or less, about 0.14 nM or less, or about 0.15 nM or less, IC 50 .
- the IC 50 can be the value measured in the ADC assay of Example 2.
- the Glypican-1 positive cells may exhibit an IC 50 less than or equal to about 0.1 nM.
- the linker used in the complex of the present disclosure may be an acid instability linker.
- Acidic pH in endosomes or lysosomes after intracellular translocation can be utilized and linkers responsive to acidic and unstable pH can be used. Examples of such a linker include hydrazone and the like.
- the linker used in the complex of the present disclosure may be a disulfide linker, such a linker being N-succinimidyl 4- (2-pyridyldithio) butanoate (SPDB),.
- a linker being N-succinimidyl 4- (2-pyridyldithio) butanoate (SPDB),.
- SPDB N-succinimidyl 4- (2-pyridyldithio) butanoate
- SPP N-succinimidyl 4- (2-pyridyldithio) pentanoate
- the linker used in the complex of the present disclosure may be a non-cleavable linker.
- the non-cleavable linker include, but are not limited to, maleimide methylcyclohexane-1-carboxylic acid (MCC linker).
- the present disclosure provides a composition comprising the complex of the present disclosure for preventing or treating Glypican-1 positive cancer.
- the Glypican-1 positive cancer can be esophageal cancer or pancreatic cancer.
- composition for the treatment of metastatic cancer in a further aspect, there is provided a composition comprising the complex of the present disclosure for preventing or treating metastatic cancer of Glypican-1 positive cancer.
- the present inventors can treat metastatic cancers of Glypican-1 positive cancers expressing Glypican-1 and metastatic cancers of Glypican-1 positive cancers with the complex of the present disclosure. I found out what I could do.
- the antigen expressed at the primary site does not always express the same antigen in metastatic cancer. Therefore, it is necessary to confirm whether or not the cancer antigen expressed at the primary site is expressed in metastatic cancer.
- GPC1 is positively expressed in the metastatic tumor tissues such as pancreatic cancer lymph node metastasis, pancreatic cancer liver metastasis, and esophageal cancer lymph node metastasis, and is significant as a therapeutic target.
- Glypican-1 positive cancers include esophageal cancer, pancreatic cancer, bile duct cancer, cervical cancer, lung cancer, head and neck cancer, breast cancer, uterine leiomyosarcoma, prostate cancer, It can be selected from oral squamous epithelial cancer, or any combination thereof.
- the Glypican-1 positive cancer can be pancreatic cancer.
- the metastatic cancer has spread to the liver, esophagus, bile duct, cervix, lung, head and neck, breast, uterine smooth muscle, prostate, oral squamous epithelium, brain, bone, peritoneum, adrenal gland, and the like. It can be metastatic cancer.
- the cancer may have cancer-related fibroblasts (CAFs).
- CAFs cancer-related fibroblasts
- the complex of the present disclosure may be administered with an immune checkpoint inhibitor.
- the immune checkpoint inhibitor include, but are not limited to, anti-PD-1 antibody, anti-PD-L1 antibody, anti-CTLA-4 antibody, anti-VISTA antibody and the like.
- the variants are 3 or less amino acid substitutions, deletions and / or additions, preferably 2 or less amino acid substitutions, deletions in each CDR of the antibodies or antigen-binding fragments thereof of the present disclosure. And / or additions, more preferably one or less amino acid substitutions, deletions and / or additions. These variants may have an affinity for GPC-1 equal to or higher than 01a033 or the antibodies of the present disclosure.
- the anti-GPC1 monoclonal antibody (clone 01a033) found as an antibody having high intracellular internalizing activity is humanized, and the internalizing activity into cells higher than that before humanization is screened for humanization anti-humanization.
- the purpose of this study is to create a humanized GPC1-ADC in which an anticancer drug is bound to a GPC1 monoclonal antibody via a linker, and to clarify the antitumor effect of the humanized GPC1-ADC in vitro and in vivo.
- the payload MMAE since the payload MMAE has the property of inducing immunogenic cell death, it is also an object to confirm that a synergistic antitumor effect can be obtained by the combined use of humanized GPC1-ADC and an immune checkpoint inhibitor. ..
- humanization was briefly performed by library construction, antigen panning and screening, binding ELISA, and affinity determination.
- a human V ⁇ library was constructed with CDRs of mouse antibodies and fixed heavy chains of the human framework, followed by antigen panning and screening.
- a total of 30 humanized anti-glycican-1 antibodies were found from the panning of the V ⁇ library and confirmed by phage ELISA. Twenty of them were selected for antibody expression and purification, after which affinity was determined by Biacore® 8K.
- VL region For the VL region, a library of human VL gene pools (LC-Library: Library diversity 4.53 ⁇ 10 5 / Library size 1.06 ⁇ 10 13 ) was used.
- the VL library gene + Ck gene + the above-mentioned humanized VH gene + CH1 were incorporated into the N-terminal side of the phage GIII antigen in this order.
- a phage library was prepared (humanized antibody library) in which a random human L chain (k) and a humanized H chain (VH + CH1) having a CDR sequence of 01a033 were presented.
- Panning was performed to select phages expressing antibodies that actually bind to GPC-1 from the humanized antibody library.
- GPC-1 which is an antigen, was bound to a solid phase (test tube, particles), a population of phage was added thereto, and the cells were washed to recover the bound phage.
- the phage was cloned by binding to the antigen by panning, infecting the eluted phage with a plate sowed with E. coli, and copying the resulting lytic plaque to a filter.
- the obtained phage clone was amplified, the binding property to the ELISA method (fixed human GPC-1 antigen) was examined for each clone, and the clones obtained with a binding signal of a certain value or higher were selected.
- Antibodies IgGed from the genes of the selected phage 20 clones were expressed in HEK293 cells (vector: pFUSE2ss-CLIg-hkpFUSE2ss-CLIg-hk (light chain, Invitrogen, catalog number: pfuse2ss-hclk) and pFUSEss-CHIg-hG1. (Heavy chain, Invitrogen, catalog number: pfusss-hchg1); Cell line: FreeStyle TM 293F Cells (Invitrogen, catalog number: R790-07)). Antibodies were purified from the culture supernatant 4 days after transfection, quantified and confirmed by SDS-PAGE. Antibody production (presence and molecular weight of H chain and L chain) was confirmed for all 20 clones.
- ⁇ Measurement of antigen-binding affinity of mouse antibody (01a033) by surface plasmon resonance method The binding affinity of mouse antibodies for human GPC-1 was measured by surface plasmon resonance method (Biacore® 8K). An anti-mouse Fc antibody was immobilized on a chip, and a mouse antibody (01a033) was flowed to bind to the chip. After washing, human GPC-1 was flowed to measure the binding constant (Ka) and dissociation constant (Kd).
- a human antibody chimeric gene was prepared by connecting the VH / VL gene of 01a033 to the human Ck / CH gene. It was expressed in HEK293F cells.
- Example 1 Affinity analysis of humanized anti-GPC1 monoclonal antibody
- Humanized mouse anti-human GPC1 monoclonal antibody (subclass IgG4) and 20 types of clones (T1, T2, T3, T7, T8, T10, T11, T22, T26, T28, T29, T31, T32, T33, T34, T36, T43, T56, T57, T59) were prepared.
- anti-human IgG Fc
- the anti-Glypican-1 (GPC-1) monoclonal antibody (01a033) was independently humanized, and as a result, 20 kinds of candidate clones were obtained. These 20 types of clones were measured Biacore (registered trademark) by the equilibrium dissociation constant (K D) (Fig. 1). As a result, 7 types of clones (clones T1, T2, T3, T8, T10, T36, T56) showing stronger affinity than the chimeric mouse antibody (01a033), which is an antibody before humanization, were confirmed (FIG. 1). ).
- Example 2 ADC assay combining a humanized anti-GPC-1 antibody and an MMAF-binding secondary antibody
- material and method confirmation of anticancer drug sensitivity of TE14 cells
- 2000 TE14 cells were added to a 96-well plate in 80 ⁇ l. The cells were cultured overnight at 37 ° C. in a 5% CO 2 incubator, and the next day, 10 ⁇ l of each clone of the humanized anti-GPC1 antibody concentrated 10-fold with respect to the final concentration was added as the primary antibody per well.
- Fab anti-human IgG antibody
- MMAF anti-cancer agent
- ADC used for assay A schematic diagram of the ADC used in the assay is shown in FIG. From 20 types of clones, clones having high intracellular internalization activity were screened by the method shown in FIG. In this method, the humanized anti-GPC1 antibody of the clone obtained in the above production example is added to the TE14 cell line, which is an esophageal cancer cell line expressing GPC1, as the primary antibody, and the anti-cancer agent (anti-cancer agent) is used as the secondary antibody.
- the humanized anti-GPC1 antibody of the clone obtained in the above production example is added to the TE14 cell line, which is an esophageal cancer cell line expressing GPC1, as the primary antibody, and the anti-cancer agent (anti-cancer agent) is used as the secondary antibody.
- MMAF By adding a conjugated anti-human IgG antibody, an anti-cancer drug is incorporated into cancer cells as a complex of a primary antibody and a secondary antibody, and cell death is induced by the action of the anti-cancer drug.
- the assay system is used.
- Example 3 Antigen affinity analysis by FACS
- clone T2 showed the highest activity, so clone T2 was selected as a humanized anti-GPC1 antibody having high intracellular internalization activity and analyzed.
- TE8-GPC1 KO cells in which GPC1 was knocked out using CRISPR-Cas9 technology as GPC1 negative cells.
- Human / mouse chimeric anti-GPC1 antibody (clone 01a033) and humanized anti-GPC1 antibody (clone T2) are used as the primary antibody, and the secondary antibody is FITC-labeled anti-human IgG-FITC (Jackson Immunoresearch, model number: 109-). It was measured using FACS CantoII (BD) using 095-098), and the measured data was analyzed using BD FACSDiva software (BD).
- Human / mouse chimeric anti-GPC1 antibody (clone 01a033) and humanized anti-GPC1 antibody (clone T2) were used as primary antibodies of various concentrations, and FITC-labeled anti-human IgG-FITC (Jackson Immunoresearch) was used as the secondary antibody. , Model No .: 109-095-098), measured using FACS CantoII (BD), and the measurement data was analyzed using BD FACSDiva software (BD).
- Example 4 Preparation of ADC
- the ADC was prepared as follows.
- the humanized anti-GPC1 antibody (clone T2) was conjugated with mAb with maleimide caproyl-valine-citrulline-p-aminobenzyloxycarbonyl-monomethyl auristatin E (MC-vc-PAB-MMAE). Conjugation was performed by a maleimide-cysteine based method in which the interchain disulfide bond of mAb was first reduced by TCEP at 37 ° C. and then the maleimide portion of the drug was bound to the reduced cysteine.
- ADC is desalted with Amicon Ultra-0.5 mL Centrifugal filters-30K (Millipore) to remove unreacted toxins, then ADC formation buffer (20 mM histidine, 7% sucrose, 0.02% (w / w /). v) The buffer was replaced with PS80, pH 5.5).
- the distribution of drug-antibody ratio (DAR) was analyzed by hydrophobic interaction chromatography- (HIC) and the degree of aggregation was analyzed by size exclusion chromatography- (SEC). The conjugate condition was set so that the drug-antibody ratio (DAR) was 4.
- FIG. 5 A schematic diagram of the structure of an exemplary ADC is shown in FIG.
- the cysteine residue of the humanized anti-GPC1 antibody (clone T2) was conjugated with MMAE, which is a payload having a bystander effect, via a cleavage-type linker cleaved by cathepsin B.
- Humanized GPC1-ADC showed DAT4.0 (FIG. 6).
- Example 5 Antigen affinity analysis of humanized GPC1-ADC and unlabeled antibody by FACS (material and method)
- human pancreatic cancer cell line (BxPC-3) cells were used as GPC1-positive cells.
- Humanized anti-GPC1 antibody (clone T2) and humanized GPC1-ADC (MMAE) were used as primary antibodies of various concentrations, and the secondary antibody was FITC-labeled anti-human IgG-FITC (Jackson Immunoresearch, model number: It was measured using FACS CantoII (BD) using 109-095-098), and the measured data was analyzed using BD FACSDiva software (BD).
- Example 6 Intracellular internalization assay of humanized anti-GPC-1 antibody (clone T2) and humanized GPC1-ADC (MMAE)).
- humanized GPC1-ADC (MMAE) was examined for internalization (intracellular transfer) activity using a GPC1-positive BxPC-3 cell line using FACS.
- the BxPC-3 cell line was peeled off from one 10 cm plate using 0.02% EDTA and recovered. Cells were suspended in RPMI 1640 + 10% FBS + 1% GlutaMAX TM I + 100 U / ml penicillin + 100 ⁇ g / ml streptomycin and prepared in 1.5 ml tubes as 2.0x10 6 cells / 0.9 ml. It was allowed to stand on ice for 1 hour to reduce the internalization activity.
- incubation group 12 cells were used.
- the incubation time was 0h, 1h, 2h, 3h, 4h, 6h.
- cells were centrifuged at 1500 rpm, 4 ° C. for 5 minutes and the supernatant was removed.
- the cells were washed with 100 ⁇ l of ice-cold PBS + 0.2% BSA and centrifuged. The cleaning operation was performed a total of 3 times.
- humanized anti-GPC1 antibody clone T2
- humanized GPC1 when internalized using the GPC1-positive BxPC-3 cell line for humanized anti-GPC1 antibody (clone T2) and humanized GPC1-ADC (MMAE).
- the intracellular localization of ADC was investigated using a fluorescent microscope.
- BxPC-3 cells were seeded at 7.5x10 4 cells / well (1 ml / well) in a 12-well plate (Corning: 3513) containing 18 mm microcover glass (matsunami), and the cells were seeded at 37 ° C. in a 5% CO 2 incubator. Incubated overnight.
- the antibody solution was aspirated, 1.0 ml ice-cold RPMI 1640 + 10% FBS + 1% GlutaMAX TM I + 100 U / ml penicillin + 100 ⁇ g / ml streptomycin was added, and the cells were washed. The sample at this point was collected as a 0-hour sample (0h).
- the cells were washed 3 times with 1 ml PBS, the cover glass to which the cells were adhered was taken out, sealed on a slide glass with a Vectorshield (Vectashield H1200), and with an all-in-one fluorescence microscope (Keyence, BZ-X800). Observed.
- both the humanized anti-GPC1 antibody (T2) and the humanized anti-GPC1-ADC were found to be CD107a. From the co-localization, it was confirmed that the humanized anti-GPC1 antibody (T2) and the humanized anti-GPC1-ADC bind to GPC1 and then transfer to lysosomes (FIG. 8).
- Example 7 in vitro ADC assay using humanized GPC1-ADC (MMAE)) (material and method) GPC1 expression analysis by FACS was performed.
- the mouse anti-GPC1 antibody (clone 01a033) whose expression of GPC1 was analyzed by FACS analysis was used as the primary antibody, and FITC-labeled goat anti-mouse IgG (H + L chain specific) (southern biothech) was used as the secondary antibody. Measurements were made using FACS Canto II (BD) and the measurement data were analyzed using FlowJo TM software (T
- the in vitro ADC assay using the humanized GPC1-ADC (MMAE) prepared in Example 4 was performed as follows. (1) The cells were sprinkled on a 96-well white plate (model number 136101) manufactured by Thermo Fisher Scientific (model number 136101) (cell suspension 90 ⁇ L).
- the medium used was RPMI1640 + 10% FBS + 100U / ml penicillin + 100 ⁇ g / ml streptomycin (RPMI1640 + 10% FBS + 1% GlutaMAX TM I + 100U / ml penicillin + 100 ⁇ g / ml streptomycin, Detroit562, Detroit 562, FaDU / Ml streptomycin, Ho-1-u-1 used DMEM / F12 + 10% FBS + 100U / ml penicillin + 100 ⁇ g / ml streptomycin).
- Cells were seeded in 60 wells in the center of the plate and 100 ⁇ L of medium was added to the outer 36 wells. The cells were cultured at 37 ° C. in a 5% CO 2 incubator.
- IC50 10 ⁇ (Log [A] [B] ⁇ (50C) / (DC) + Log [B]) A: High concentration sandwiching 50% B: Inhibition rate at low concentration C: B sandwiching 50% D: Inhibition rate at A.
- humanized GPC1-ADC exerted a medicinal effect on GPC1-positive cancer cell lines, but showed no medicinal effect on GPC1-negative cancer cell lines. It was confirmed that the drug efficacy was dependent on the expression of GPC1 (Fig. 10). It was confirmed that humanized GPC1-ADC shows efficacy in a GPC1 expression-dependent manner against cervical cancer, head and neck tumor, and oral squamous cell carcinoma cell lines in addition to pancreatic cancer and esophageal cancer cell lines. (Figs. 11 and 12).
- Example 9 In vivo drug efficacy test of humanized GPC1-ADC (MMAE) using pancreatic cancer PDX (PK565)) (material and method) The expression of GPC1 in pancreatic cancer PDX (PK565) was confirmed as follows.
- GPC1 After deparaffinizing thin slices of paraffin-embedded tissue, dehydration was performed with alcohol.
- the immunohistochemical staining method for GPC1 was performed using an anti-GPC-1 antibody (Genetex: GTX104557) and Chemmate Envision kit HRP 500T (Dako: K5007).
- the expression of GPC1 in PK565 was confirmed to be a heterogeneous tumor in which positive and negative were mixed in pancreatic cancer cells.
- Pancreatic cancer PDX was subcutaneously transplanted into 6-week-old NOG female mice, and when the tumor size became about 100 mm 3 after transplantation, PBS, control ADC (10 mg / kg), and humanized anti-humanization prepared in Example 4 were performed.
- Intravenous administration was performed on the 0th day, the 7th day, the 14th day and the 21st day, with the day when the administration was started as the 0th day. Tumor volume and body weight were measured from day 0 to day 42 twice a week.
- Example 10 In vivo drug efficacy test of humanized GPC1-ADC (MMAE) using pancreatic cancer PDX (PK175)) (material and method)
- the expression of GPC1 in pancreatic cancer PDX (PK175) was confirmed as follows.
- GPC1 After deparaffinizing thin slices of paraffin-embedded tissue, dehydration was performed with alcohol.
- the immunohistochemical staining method for GPC1 was performed using an anti-GPC-1 antibody (Genetex: GTX104557) and Chemmate Envision kit HRP 500T (Dako: K5007). Expression of GPC1 in PK175 was confirmed to be a positive tumor in both pancreatic cancer cells and cancer-related fibroblasts (CAF).
- Pancreatic cancer PDX was subcutaneously transplanted into 6-week-old NOG female mice, and when the tumor size became about 100 mm 3 after transplantation, PBS and humanized anti-GPC1-ADC (MMAE) (1 mg / kg), ( Administration of 3 mg / kg) and (10 mg / kg) was started. Intravenous administration was performed on the 0th day, the 7th day, the 14th day and the 21st day, with the day when the administration was started as the 0th day. Tumor volume and body weight were measured from day 0 to day 42 twice a week.
- MMAE humanized anti-GPC1-ADC
- Example 11 In vivo drug efficacy test of GPC1-ADC using esophageal cancer PDX (ESCC14)) (material and method)
- the expression of GPC1 in esophageal cancer PDX (ESCC14) was confirmed as follows.
- GPC1 After deparaffinizing thin slices of paraffin-embedded tissue, dehydration was performed with alcohol.
- the immunohistochemical staining method for GPC1 was performed using an anti-GPC-1 antibody (Genetex: GTX104557) and Chemmate Envision kit HRP 500T (Dako: K5007). It was confirmed that the expression of GPC1 in ESCC14 is a homogeneous tumor that is uniformly and highly expressed in esophageal cancer cells.
- Esophageal cancer PDX was subcutaneously transplanted into 6-week-old NOG female mice, and when the tumor size became about 100 mm 3 after transplantation, PBS was used as a control and the humanized anti-GPC1-ADC (MMAE) prepared in Example 4 was used. ) (1 mg / kg), (3 mg / kg), and (10 mg / kg) were started. Intravenous administration was performed on the 0th day, the 7th day, the 14th day and the 21st day, with the day when the administration was started as the 0th day. Tumor volume and body weight were measured from day 0 to day 42 twice a week.
- MMAE humanized anti-GPC1-ADC
- Example 12 GPC1 expression analysis by FACS analysis of mGPC1 forced expression mouse colon cancer cell line (mGPC1-MC38)) (material and method)
- mGPC1-MC38 cells humanized anti-GPC1 antibody (clone T2) was used as the primary antibody, and the secondary antibody was FITC-labeled anti-human IgG-FITC (Jackson Immunoresearch, model number: 109-095-098).
- BD FACS CantoII
- MMAE immunogenic cell death
- DAMPs damage-assisted tumor patches
- Example 13 Quantification of HMGB-1 in culture supernatant by ELISA
- Control-ADC, humanized GPC1-ADC and MMAE were added in vitro to MC38-mGPC1, and the culture supernatant was collected after 48 hours.
- the concentration of HMGB-1 in the culture supernatant was carried out using HMGB1 ELISA KIT II-HMGB1 measurement reagent (Sinotest, model number SNO-326054329).
- HMGB1 high mobility group box-1
- DAMPs damage-associated molecular patterns
- Example 14 Confirmation of synergistic effect by combined use of humanized GPC1-ADC (MMAE) and anti-PD1 antibody using colorectal cancer syngenic model mouse) (material and method)
- MMAE humanized GPC1-ADC
- anti-PD1 antibody using colorectal cancer syngenic model mouse material and method
- MC38-mGPC1 was subcutaneously transplanted into 8-week-old C57BL / 6 female mice, and when the tumor size became about 75 mm 3 after transplantation, the cells were divided into 4 groups, and PBS was used to prepare the humanized anti-GPC1-ADC (Example 4).
- MMAE (10 mg / kg), anti-mouse PD1 antibody (clone RMP1-14) (3 mg / kg), humanized anti-GPC1-ADC (MMAE) (10 mg / kg) + anti-mouse PD1 antibody (clone RMP1-14) ( Administration of 3 mg / kg) was started. With the day when the administration was started as the 0th day, the ADC was intravenously administered on the 0th day, the 3rd day, the 7th day and the 10th day, and the anti-mouse PD1 antibody was intraperitoneally administered. Tumor volume and body weight were measured from day 0 to day 21 twice a week.
- Example 15 In vivo mechanism of action analysis of humanized GPC1-ADC (MMAE) using pancreatic cancer PDX (PK565))
- Pancreatic cancer PDX (material and method) Pancreatic cancer PDX (PK565) was subcutaneously transplanted into 6-week-old NOG female mice, and when the tumor size became about 100 mm 3 after transplantation, PBS, control ADC (10 mg / kg), and Example 4 were prepared.
- Humanized anti-GPC1-ADC (MMAE) (1 mg / kg), (3 mg / kg), (10 mg / kg) was administered. The tumor was removed 24 hours after administration. The excised tissue was fixed with 10% neutral formalin buffer, and then a paraffin-embedded tissue was prepared to prepare slices. For each slice, the expression of phosphor-histone H3 (Ser10) was analyzed by immunohistochemical staining to evaluate cancer cells whose cell cycle was arrested in the G2 / M phase.
- phosphor-histone H3 (Ser10) was analyzed by immunohistochemical staining to evaluate cancer cells whose cell cycle was arrested in the G2 / M phase.
- Example 16 Analysis of GPC1 expression by immunohistochemical staining in distant metastatic tissue of pancreatic cancer
- pancreatic cancer distant metastasis such as lymph node metastasis and liver metastasis is known as a poor prognosis factor. Therefore, if GPC1 is expressed not only in the primary lesion of pancreatic cancer but also in distant metastatic lesions, it is considered to be highly useful as a therapeutic target. Therefore, the expression of GPC1 was evaluated for lymph node metastasis, liver metastasis, and adrenal metastasis of pancreatic cancer by immunohistochemical staining.
- the humanized GPC1-ADC (MMAE) of the present invention is effective for the treatment or prevention of metastatic cancer of GPC1-positive cancer.
- Example 16 In order to confirm the therapeutic or preventive effect of humanized GPC1-ADC (MMAE) on metastatic cancer suggested in Example 16, a pancreatic cancer liver metastasis model was created.
- MMAE humanized GPC1-ADC
- BxPC3-Luc cells were administered into the spleen of SCID mice, and the spleen was removed 1 to 2 weeks after the administration to prepare a pancreatic cancer liver metastasis model.
- the proliferation of BxPC3-Luc cells metastasized in the liver was monitored by measuring luciferase activity using IVIS.
- Liver metastasis model mice were divided into two groups, a PBS-administered group and a humanized anti-GPC1-ADC (MMAE) (10 mg / kg) -administered group prepared in Example 4, and a drug efficacy test was conducted in the same procedure as in Example 16. rice field.
- MMAE humanized anti-GPC1-ADC
- Example 18 Drug efficacy test with humanized GPC1-ADC in metastatic cancer
- Humanized GPC1-ADC exerts a medicinal effect on both the primary and metastatic lesions, and is expected to have an effect of prolonging the survival period.
- the humanized anti-GPC1-ADC (MMAE) of the present invention can be provided as the following intravenous injection preparations.
- Humanized anti-GPC1-ADC 100 mg Polysorbate 80 5 mg Sodium chloride 100 mg Sodium citrate hydrate 80 mg Acidity regulator Appropriate amount Total amount 10mL
- a drug for the treatment or prevention of cancer was provided. Technologies that can be used in industries (pharmaceuticals, etc.) based on such technologies are provided.
- SEQ ID NO: 1 Human Glypican-1 nucleic acid sequence
- SEQ ID NO: 2 Human Glypican-1 amino acid sequence
- SEQ ID NO: 3 Mouse Glypican-1 nucleic acid sequence
- SEQ ID NO: 4 Mouse Glypican-1 amino acid sequence
- SEQ ID NO: 5 01a03 Chain variable region amino acid sequence
- SEQ ID NO: 6 01a033
- SEQ ID NO: 7 Humanized heavy chain variable region amino acid sequence
- SEQ ID NO: 10 Amino acid sequence of the humanized light chain variable region of clone T8
- 11 Amino acid sequence of the humanized light chain variable region of clone T1
- SEQ ID NO: 12 Clone Amino acid sequence of the humanized light chain variable region of T36
- 13 Amino acid
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Abstract
Description
(項目1)
配列番号5に記載のアミノ酸配列を有する重鎖可変領域と配列番号6に記載のアミノ酸配列を有する軽鎖可変領域とを含む抗体に基づきヒト化されたヒト化抗GPC-1抗体またはその抗原結合フラグメントであって、配列番号5に記載のアミノ酸配列を有する重鎖可変領域と配列番号6に記載のアミノ酸配列を有する軽鎖可変領域とを含む抗体と比べて、GPC-1に対して高い親和性を有する、ヒト化抗体またはその抗原結合フラグメント。
(項目2)
前記ヒト化抗体またはその抗原結合フラグメントが、
(a)それぞれ配列番号28~30に記載のアミノ酸配列を有する重鎖CDR1~3を含む、または
(b)(a)における重鎖CDR1~3において3個以下のアミノ酸置換、欠失および/または付加を有する、
項目1に記載の組成物。
(項目3)
前記ヒト化抗体またはその抗原結合フラグメントが、
(a)それぞれ配列番号31~33に記載のアミノ酸配列を有する軽鎖CDR1~CDR3を含む、または
(b)それぞれ配列番号34~36に記載のアミノ酸配列を有する軽鎖CDR1~CDR3を含む、または
(c)それぞれ配列番号37~39に記載のアミノ酸配列を有する軽鎖CDR1~CDR3を含む、または
(d)それぞれ配列番号40~42に記載のアミノ酸配列を有する軽鎖CDR1~CDR3を含む、または
(e)それぞれ配列番号43~45に記載のアミノ酸配列を有する軽鎖CDR1~CDR3を含む、または
(f)それぞれ配列番号46~48に記載のアミノ酸配列を有する軽鎖CDR1~CDR3を含む、または
(g)それぞれ配列番号49~51に記載のアミノ酸配列を有する軽鎖CDR1~CDR3を含む、または
(h)それぞれ配列番号52~54に記載のアミノ酸配列を有する軽鎖CDR1~CDR3を含む、または
(i)それぞれ配列番号55~57に記載のアミノ酸配列を有する軽鎖CDR1~CDR3を含む、または
(j)それぞれ配列番号58~60に記載のアミノ酸配列を有する軽鎖CDR1~CDR3を含む、または
(k)それぞれ配列番号61~63に記載のアミノ酸配列を有する軽鎖CDR1~CDR3を含む、または
(l)それぞれ配列番号64~66に記載のアミノ酸配列を有する軽鎖CDR1~CDR3を含む、または
(m)それぞれ配列番号67~69に記載のアミノ酸配列を有する軽鎖CDR1~CDR3を含む、または
(n)それぞれ配列番号70~72に記載のアミノ酸配列を有する軽鎖CDR1~CDR3を含む、または
(o)それぞれ配列番号73~75に記載のアミノ酸配列を有する軽鎖CDR1~CDR3を含む、または
(p)それぞれ配列番号76~78に記載のアミノ酸配列を有する軽鎖CDR1~CDR3を含む、または
(q)それぞれ配列番号79~81に記載のアミノ酸配列を有する軽鎖CDR1~CDR3を含む、または
(r)それぞれ配列番号82~84に記載のアミノ酸配列を有する軽鎖CDR1~CDR3を含む、または
(s)それぞれ配列番号85~87に記載のアミノ酸配列を有する軽鎖CDR1~CDR3を含む、または
(t)それぞれ配列番号88~90に記載のアミノ酸配列を有する軽鎖CDR1~CDR3を含む、または
(u)(a)~(t)のいずれかにおける軽鎖CDR1~3において3個以下のアミノ酸置換、欠失および/または付加を有する、
項目1または2に記載のヒト化抗体またはその抗原結合フラグメント。
(項目4)
配列番号7に記載のアミノ酸配列と少なくとも90%同一のアミノ酸配列を有する重鎖可変領域を含む、項目1~3のいずれか一項に記載のヒト化抗体またはその抗原結合フラグメント。
(項目5)
配列番号8~27に記載のアミノ酸配列からなる群から選択されるアミノ酸配列と少なくとも90%同一のアミノ酸配列を有する軽鎖可変領域を含む、項目1~4のいずれか一項に記載のヒト化抗体またはその抗原結合フラグメント。
(項目6)
配列番号8~27に記載のアミノ酸配列からなる群から選択されるアミノ酸配列を有する軽鎖可変領域を含む、項目1~5のいずれか一項に記載のヒト化抗体またはその抗原結合フラグメント。
(項目7)
配列番号8~17に記載のアミノ酸配列からなる群から選択されるアミノ酸配列と少なくとも90%同一のアミノ酸配列を有する軽鎖可変領域を含む、項目1~6のいずれか一項に記載のヒト化抗体またはその抗原結合フラグメント。
(項目8)
配列番号8~17に記載のアミノ酸配列からなる群から選択されるアミノ酸配列を有する軽鎖可変領域を含む、項目1~7のいずれか一項に記載のヒト化抗体またはその抗原結合フラグメント。
(項目9)
前記抗体のエピトープが、配列番号2の339~358位および/もしくは388~421位を含む、項目1~8のいずれか一項に記載のヒト化抗体またはその抗原結合フラグメント。
(項目10)
前記抗体が、表面プラズモン共鳴法による解析に基づき1.02E-8以下のKDでGlypican-1に結合する、項目1~9のいずれか一項に記載のヒト化抗体またはその抗原結合フラグメント。
(項目11)
項目1~10のいずれか一項に記載のヒト化抗体またはその抗原結合フラグメントを含む、有効成分を細胞内移行させるための医薬組成物。
(項目12)
項目1~10のいずれか一項に記載のヒト化抗体またはその抗原結合フラグメントと細胞傷害性活性を有する薬剤との複合体。
(項目13)
前記ヒト化抗体またはその抗原結合フラグメントが、前記細胞傷害性活性を有する薬剤とリンカーを介して作動可能に連結されている、項目12に記載の複合体。
(項目14)
前記細胞傷害性活性を有する薬剤が、モノメチルアウリスタチンE(MMAE)、モノメチルアウリスタチンF(MMAF)、DM1、DM4、カリケアマイシン、デュオカルマイシン、ピロロベンゾジアゼピン(PBD)、およびトポイソメラーゼ阻害剤からなる群から選択される、項目12または13に記載の複合体。
(項目15)
前記細胞傷害性活性を有する薬剤が、細胞膜透過性である、項目13または14に記載の複合体。
(項目16)
前記細胞傷害性活性を有する薬剤が、MMAE、PBD、Eribulin、SN-38、Dxd、およびDM4から選択される、項目13~15のいずれか一項に記載の複合体。
(項目17)
前記リンカーが、酵素切断型リンカー、酸不安定性リンカー、およびジスルフィドリンカーからなる群から選択される、項目13~16のいずれか一項に記載の複合体。
(項目18)
前記リンカーが、カテプシンBにより切断される切断型リンカーである、項目13~17のいずれか一項に記載の複合体。
(項目19)
前記複合体が、Glypican-1陽性細胞において、約0.1nM以下のIC50を示す、項目12~18のいずれか一項に記載の複合体。
(項目20)
項目12~19のいずれか一項に記載の複合体を含む、Glypican-1陽性がんを予防または治療するための組成物。
(項目21)
前記Glypican-1陽性がんは、食道がん、膵臓がん、胆管がん、子宮頸がん、肺がん、頭頸部がん、乳がん、子宮平滑筋肉腫、前立腺がん、口腔扁平上皮がんまたはこれらの任意の組合せから選択される、項目20に記載の組成物。
(項目22)
前記Glypican-1陽性がんは、食道がんまたは膵臓がんである、項目20または21に記載の組成物。
(項目23)
前記がんは、がん関連線維芽細胞(CAF)を有する、項目20~22のいずれか一項に記載の組成物。
(項目24)
前記組成物が、免疫チェックポイント阻害剤と一緒に投与されることを特徴とする、項目20~23のいずれか一項に記載の組成物。
(項目25)
前記免疫チェックポイント阻害剤が、抗PD-1抗体である、項目24に記載の組成物。
(項目26)
項目12~19のいずれか一項に記載の複合体を含む、Glypican-1陽性がんの転移性がんを予防または治療するための組成物。
(項目27)
前記Glypican-1陽性がんは、食道がん、膵臓がん、胆管がん、子宮頸がん、肺がん、頭頸部がん、乳がん、子宮平滑筋肉腫、前立腺がん、口腔扁平上皮がん、またはこれらの任意の組合せから選択される、項目26に記載の組成物。
(項目28)
前記転移性がんが、膵臓がんの転移性がんである、項目26または27に記載の組成物。
(項目29)
前記転移性がんが、肝臓、食道、胆管、子宮頸、肺、頭頸部、乳房、子宮平滑筋、前立腺、口腔扁平上皮、脳、骨、腹膜、または副腎に転移した転移性がんである、項目26~28のいずれか一項に記載の組成物。
(項目1A)
有効成分を細胞内移行させる方法であって、項目1~10のいずれか一項に記載のヒト化抗体またはその抗原結合フラグメントを細胞に投与する工程を含む、方法。
(項目2A)
被験体におけるGlypican-1陽性がんを予防または治療する方法であって、項目12~19のいずれか一項に記載の複合体を被験体に投与する工程を含む、方法。
(項目3A)
前記Glypican-1陽性がんは、食道がん、膵臓がん、胆管がん、子宮頸がん、肺がん、頭頸部がん、乳がん、子宮平滑筋肉腫、前立腺がん、口腔扁平上皮がんまたはこれらの任意の組合せから選択される、項目2Aに記載の方法。
(項目4A)
前記Glypican-1陽性がんは、食道がんまたは膵臓がんである、項目2Aまたは3Aに記載の方法。
(項目5A)
前記がんは、がん関連線維芽細胞(CAF)を有する、項目2A~4Aのいずれか一項に記載の方法。
(項目6A)
免疫チェックポイント阻害剤を投与する工程をさらに含む、項目2A~5Aのいずれか一項に記載の方法。
(項目7A)
前記免疫チェックポイント阻害剤が、抗PD-1抗体である、項目6Aに記載の方法。
(項目8A)
被験体におけるGlypican-1陽性がんの転移性がんを予防または治療する方法であって、項目12~19のいずれか一項に記載の複合体を被験体に投与する工程を含む、方法。
(項目9A)
前記Glypican-1陽性がんは、食道がん、膵臓がん、胆管がん、子宮頸がん、肺がん、頭頸部がん、乳がん、子宮平滑筋肉腫、前立腺がん、口腔扁平上皮がん、またはこれらの任意の組合せから選択される、項目8Aに記載の方法。
(項目10A)
前記転移性がんが、膵臓がんの転移性がんである、項目8Aまたは9Aに記載の方法。
(項目11A)
前記転移性がんが、肝臓、食道、胆管、子宮頸、肺、頭頸部、乳房、子宮平滑筋、前立腺、口腔扁平上皮、脳、骨、腹膜、または副腎に転移した転移性がんである、項目8A~10Aのいずれか一項に記載の方法。
(項目1B)
有効成分を細胞内移行させるための医薬の製造における、項目1~10のいずれか一項に記載のヒト化抗体またはその抗原結合フラグメントの使用。
(項目2B)
被験体におけるGlypican-1陽性がんを予防または治療するための医薬の製造における、項目12~19のいずれか一項に記載の複合体の使用。
(項目3B)
前記Glypican-1陽性がんは、食道がん、膵臓がん、胆管がん、子宮頸がん、肺がん、頭頸部がん、乳がん、子宮平滑筋肉腫、前立腺がん、口腔扁平上皮がんまたはこれらの任意の組合せから選択される、項目2Bに記載の使用。
(項目4B)
前記Glypican-1陽性がんは、食道がんまたは膵臓がんである、項目2Bまたは3Bに記載の使用。
(項目5B)
前記がんは、がん関連線維芽細胞(CAF)を有する、項目2B~4Bのいずれか一項に記載の使用。
(項目6B)
前記複合体が、免疫チェックポイント阻害剤と一緒に投与されることを特徴とする、項目2B~5Bのいずれか一項に記載の使用。
(項目7B)
前記免疫チェックポイント阻害剤が、抗PD-1抗体である、項目6Bに記載の使用。
(項目8B)
被験体におけるGlypican-1陽性がんの転移性がんを予防または治療するための医薬の製造における、項目12~19のいずれか一項に記載の複合体の使用。
(項目9B)
前記Glypican-1陽性がんは、食道がん、膵臓がん、胆管がん、子宮頸がん、肺がん、頭頸部がん、乳がん、子宮平滑筋肉腫、前立腺がん、口腔扁平上皮がん、またはこれらの任意の組合せから選択される、項目8Bに記載の使用。
(項目10B)
前記転移性がんが、膵臓がんの転移性がんである、項目8Bまたは9Bに記載の使用。
(項目11B)
前記転移性がんが、肝臓、食道、胆管、子宮頸、肺、頭頸部、乳房、子宮平滑筋、前立腺、口腔扁平上皮、脳、骨、腹膜、または副腎に転移した転移性がんである、項目8B~10Bのいずれか一項に記載の使用。
(項目1C)
有効成分を細胞内移行させるための、項目1~10のいずれか一項に記載のヒト化抗体またはその抗原結合フラグメント。
(項目2C)
被験体におけるGlypican-1陽性がんを予防または治療するための、項目12~19のいずれか一項に記載の複合体。
(項目3C)
前記Glypican-1陽性がんは、食道がん、膵臓がん、胆管がん、子宮頸がん、肺がん、頭頸部がん、乳がん、子宮平滑筋肉腫、前立腺がん、口腔扁平上皮がんまたはこれらの任意の組合せから選択される、項目2Cに記載の複合体。
(項目4C)
前記Glypican-1陽性がんは、食道がんまたは膵臓がんである、項目2Cまたは3Cに記載の複合体。
(項目5C)
前記がんは、がん関連線維芽細胞(CAF)を有する、項目2C~4Cのいずれか一項に記載の複合体。
(項目6C)
前記複合体が、免疫チェックポイント阻害剤と一緒に投与されることを特徴とする、項目2C~5Cのいずれか一項に記載の複合体。
(項目7C)
前記免疫チェックポイント阻害剤が、抗PD-1抗体である、項目6Cに記載の複合体。
(項目8C)
被験体におけるGlypican-1陽性がんの転移性がんを予防または治療するための、項目12~19のいずれか一項に記載の複合体。
(項目9C)
前記Glypican-1陽性がんは、食道がん、膵臓がん、胆管がん、子宮頸がん、肺がん、頭頸部がん、乳がん、子宮平滑筋肉腫、前立腺がん、口腔扁平上皮がん、またはこれらの任意の組合せから選択される、項目8Cに記載の複合体。
(項目10C)
前記転移性がんが、膵臓がんの転移性がんである、項目8Cまたは9Cに記載の複合体。
(項目11C)
前記転移性がんが、肝臓、食道、胆管、子宮頸、肺、頭頸部、乳房、子宮平滑筋、前立腺、口腔扁平上皮、脳、骨、腹膜、または副腎に転移した転移性がんである、項目8C~10Cのいずれか一項に記載の複合体。
最初に本開示において使用される用語および一般的な技術を説明する。
以下に本開示の好ましい実施形態を説明する。以下に提供される実施形態は、本開示のよりよい理解のために提供されるものであり、本開示の範囲は以下の記載に限定されるべきでないことが理解される。従って、当業者は、本明細書中の記載を参酌して、本開示の範囲内で適宜改変を行うことができることは明らかである。また、本開示の以下の実施形態は単独でも使用されあるいはそれらを組み合わせて使用することができることが理解される。
1つの局面において、本開示は、配列番号5に記載のアミノ酸配列を有する重鎖可変領域と配列番号6に記載のアミノ酸配列を有する軽鎖可変領域とを含む抗体に基づきヒト化されたヒト化抗GPC-1抗体またはその抗原結合フラグメントを提供する。本発明者らは、国際公開第2018/199318号(参照により本明細書に組み込まれる)に開示されるGPC-1に対して高い親和性を有する抗GPC-1マウスモノクローナル抗体である01a033(配列番号5の重鎖可変領域および配列番号6の軽鎖可変領域を含む)をヒト化したところ、予想外にも01a033よりも高い親和性を有するヒト化抗体を取得することに成功した。したがって、本開示のヒト化抗体は、配列番号5に記載のアミノ酸配列を有する重鎖可変領域と配列番号6に記載のアミノ酸配列を有する軽鎖可変領域とを含む抗体と比べて、GPC-1に対して高い親和性を有し得る。
さらなる局面において、本開示は、本開示のヒト化抗体またはその抗原結合フラグメントと細胞傷害性活性を有する薬剤との複合体を提供する。細胞傷害性活性を有する薬剤は、リンカーを介して作動可能にヒト化抗体またはその抗原結合フラグメントに連結され得る。
さらなる局面において、本開示は、本開示の複合体を含む、Glypican-1陽性がんを予防または治療するための組成物を提供する。食道がん、膵臓がん、胆管がん、子宮頸がん、肺がん、頭頸部がん、乳がん、子宮平滑筋肉腫、前立腺がん、口腔扁平上皮がんまたはこれらの任意の組合せから選択され得る。特定の実施形態において、Glypican-1陽性がんは、食道がんまたは膵臓がんであり得る。
さらなる局面において、本開示の複合体を含む、Glypican-1陽性がんの転移性がんを予防または治療するための組成物を提供する。本発明者らは、Glypican-1陽性がんの転移性がんがGlypican-1を発現していること、Glypican-1陽性がんの転移性がんを本開示の複合体により治療することができることを見出した。原発部位において発現される抗原が、必ずしも転移がんにおいて同じ抗原を発現するとは限らない。そのため、原発部位で発現が確認されたがん抗原については、転移がんにおいて発現するかどうかを確認する必要がある。GPC1について膵臓がんリンパ節転移、膵臓がん肝転移、食道がんリンパ節転移などの転移先の腫瘍組織に対して、発現が陽性であることを確認され、治療標的として意義がある。
当該分野で周知の方法に従って、当業者であれば、本開示における抗体の配列に基づき、GPC-1に対して、01a033または本開示の抗体と同等またはそれらよりも高い親和性を有する改変体を製造することが可能である。例えば、当業者であれば、ファージディスプレイ法を用いてCDR配列がわずかに異なる抗体を解析し、目的の抗体と同等またはそれより高い親和性を有する抗体をスクリーニングすることができる。その他の改変体を作成する方法としては、CDR-walking法、ランダム変異誘発法などが挙げられる。いくつかの実施形態において、改変体は、本開示の抗体またはその抗原結合フラグメントにおける各CDRにおいて、3個以下のアミノ酸置換、欠失および/または付加、好ましくは2個以下のアミノ酸置換、欠失および/または付加、より好ましくは1個以下のアミノ酸置換、欠失および/または付加を有し得る。これらの改変体は、GPC-1に対して、01a033または本開示の抗体と同等またはそれらよりも高い親和性を有し得る。
本開示のヒト化抗体の製造をHD Biosciences (China) Co., Ltdに依頼した。
<抗体ライブラリー作成>
マウス抗体(01a033)のCDRグラフティングによるヒト化H鎖VH領域作成
01a033のVHと相同性の高いAlleleをabYsisのデータベースで検索し、ヒト生殖系列配列VH1-46のフレームワークを選択して01a033のVHのCDR配列をグラフティングしたアミノ酸配列となる遺伝子を作成した。
ヒト化抗体ライブラリーの中で、実際にGPC-1に結合する抗体を発現しているファージを選択するため、パンニングを実施した。
パンニングで抗原に結合し、溶出されたファージを大腸菌を蒔いたプレートで感染させ、生じた溶菌プラークをフィルターに写し取って、ファージをクローニングした。
選択したファージ20クローンの遺伝子からIgG化した抗体をHEK293細胞で発現させた(ベクター:pFUSE2ss-CLIg-hkpFUSE2ss-CLIg-hk(軽鎖、Invivogen,カタログ番号:pfuse2ss-hclk)およびpFUSEss-CHIg-hG1(重鎖、Invivogen,カタログ番号:pfusess-hchg1);細胞系:FreeStyleTM 293F Cells(Invitrogen,カタログ番号:R790-07))。トランスフェクション後4日での培養上清から抗体を精製して定量とSDS-PAGEでの確認を行った。20クローンすべてについて抗体産生(H鎖、L鎖の存在と分子量)を確認した。
表面プラズモン共鳴法(Biacore(登録商標)8K)で取得した20クローンの抗体の抗原結合親和性を測定した。チップに抗ヒトIgG抗体を固定化し、そこにそれぞれの抗体を流して抗体を結合させ、洗浄後ヒトGPC-1抗原を流して結合定数(Ka)及び解離定数(Kd)を測定した。7クローンがマウス抗体よりも高い親和性を示した。
表面プラズモン共鳴法(Biacore(登録商標)8K)でマウス抗体のヒトGPC-1への結合親和性を測定した。チップに抗マウスFc抗体を固定化し、そこにマウス抗体(01a033)を流して結合させ、洗浄後にヒトGPC-1を流して結合定数(Ka)及び解離定数(Kd)を測定した。
01a033のVH/VL遺伝子をヒトCk/CH遺伝子につないでヒト抗体キメラ遺伝子を作成した。HEK293F細胞で発現させた。
(材料および方法)
マウス抗ヒトGPC1モノクローナル抗体をヒト化(サブクラスはIgG4)し、得られた20種類のクローン(T1,T2,T3,T7,T8,T10,T11,T22,T26,T28,T29,T31,T32,T33,T34,T36,T43,T56,T57,T59)を調製した。これらのクローンについて、組換えヒトGPC1タンパク質(R&D systems社)との親和性をHuman antibody capture kit(GE Healthcare)を用いて抗ヒトIgG(Fc)をsCM5 sensor chip(GE Healthcare)に固相化し、Biacore(登録商標)8K(GE Healthcare)を用いて測定した。
抗Glypican-1(GPC-1)モノクローナル抗体(01a033)を独自にヒト化し、その結果、20種類の候補クローンを取得した。これらの20種類のクローンについて、Biacore(登録商標)により平衡解離定数(KD)を測定した(図1)。その結果、ヒト化する前の抗体であるキメラマウス抗体(01a033)よりも強い親和性を示すクローンが7種類(クローンT1,T2,T3,T8,T10,T36,T56)確認された(図1)。
(材料および方法)
(TE14細胞の抗がん剤感受性の確認)
96ウェルプレートに2000個のTE14細胞を80μlで添加した。一晩、37℃、5%CO2インキュベーターで培養し、翌日、最終濃度に対して10倍濃縮したヒト化抗GPC1抗体の各種クローンを1次抗体として1ウェルあたり10μlずつ添加した。続いて、2次抗体として抗がん剤(MMAF)をリンカーを介して結合した抗ヒトIgG抗体(Fab)(MORADEC、型番AH-202AF-50)を1ウェルあたり10μlずつ添加して合計100μlとした。37℃、5%CO2インキュベーターで6日間培養しCell Titer-Glo Luminescent Cell Viability Assay試薬を用いてATP量を検出することで細胞の生存を測定した。培地は、RPMI1640+10%FBS+1%PSを使用した。
アッセイに使用するADCの概略図を図2に示す。20種類のクローンの中から細胞内インターナライズ活性の高いクローンを図2に示す方法によりスクリーニングした。本手法はGPC1を発現する食道がん細胞株であるTE14細胞株に、上記製造例で得られたクローンのヒト化抗GPC1抗体を1次抗体として添加し、2次抗体として抗がん剤(MMAF)コンジュゲート抗ヒトIgG抗体を添加することで、がん細胞内に1次抗体と2次抗体の複合体として抗がん剤を取り込ませ、抗がん剤の作用により細胞死が誘導されるアッセイ系を用いている。
キメラマウス抗体(01a033)よりも高い細胞内インターナライズ活性を示すクローンが10種類確認された(クローンT2,T7,T8,T1,T36,T57,T10,T34,T56,T3)(図3)。
実施例2の結果、クローンT2が最も高い活性を示したため、クローンT2を細胞内インターナライズ活性の高いヒト化抗GPC1抗体として選出し、解析を行った。
抗体を用いたFACS解析を行うにあたり、GPC1陽性細胞として、ヒト食道がん細胞株(TE8)細胞を、GPC1陰性細胞としてCRISPR-Cas9技術を用いてGPC1をノックアウトしたTE8-GPC1 KO細胞を用いた。ヒト/マウスキメラ抗GPC1抗体(クローン01a033)およびヒト化抗GPC1抗体(クローンT2)を1次抗体として用い、2次抗体としてはFITC標識抗ヒトIgG-FITC(Jackson Immuno research社、型番:109-095-098)を用い、FACS CantoII(BD社)を用いて測定し、測定データはBD FACSDiva software(BD社)を用いて解析した。
ヒト/マウスキメラ抗GPC1抗体(クローン01a033)およびヒト化抗GPC1抗体(クローンT2)を、種々の濃度の1次抗体として用い、2次抗体としてはFITC標識抗ヒトIgG-FITC(Jackson Immuno research社、型番:109-095-098)を用い、FACS CantoII(BD社)を用いて測定し、測定データはBD FACSDiva software(BD社)を用いて解析した。
GPC1陽性の食道がん細胞株であるTE8と、CRISPR/Cas9システムによりGPC1をノックアウトしたTE8-GPC1-KO細胞に対して、キメラマウス抗体(01a033)、および、ヒト化抗GPC1抗体(T2)を用いてFACS解析を行った結果、TE8-GPC1-KO細胞とは反応性を示さず、TE8細胞のみ反応性を示したため、ヒト化抗GPC1抗体(T2)がGPC1特異的に結合していることが確認された(図4)。また、TE8細胞表面上のGPC1との反応性についても、ヒト化抗GPC1抗体(T2)はキメラマウス抗体(01a033)よりも高い親和性を示すことを明らかにした(図4)。
本実施例において、ADCを以下のとおり作製した。
例示的なADCの構造の概略図を図5に示す。図5に示す通り、ヒト化抗GPC1抗体(クローンT2)のシステイン残基に、カテプシンBにより切断される切断型リンカーを介してバイスタンダー効果を有するペイロードであるMMAEをコンジュゲートした。ヒト化GPC1-ADCはDAR4.0を示した(図6)。
(材料および方法)
抗体を用いたFACS解析を行うにあたり、GPC1陽性細胞として、ヒト膵臓がん細胞株(BxPC-3)細胞を用いた。ヒト化抗GPC1抗体(クローンT2)およびヒト化GPC1-ADC(MMAE)を、種々の濃度の1次抗体として用い、2次抗体としてはFITC標識抗ヒトIgG-FITC(Jackson Immuno research社、型番:109-095-098)を用い、FACS CantoII(BD社)を用いて測定し、測定データはBD FACSDiva software(BD社)を用いて解析した。
ヒト化抗GPC1抗体(T2)にペイロードをコンジュゲートしたことによる抗原親和性への影響について、GPC1発現陽性のBxPC3細胞を用いて、抗体濃度依存的な結合能をFACS解析により評価した。その結果、ヒト化抗GPC1-ADCはヒト化抗GPC1抗体(T2)と同等のKD値を示したため、ペイロードのコンジュゲートにより抗原親和性の大きな低下は起きていないことが確認された(図7)。
本実施例では、ヒト化GPC1-ADC(MMAE)について、GPC1陽性BxPC-3細胞株を用いてインターナライズ(細胞内移行)活性を、FACSを用いて調べた。
ヒト化抗GPC1抗体(clone T2)およびヒト化GPC1-ADC(MMAE)で処理した細胞に対してanti-GPC1 mAb(ビオチン標識02b006)とPE標識ストレプトアビジンで検出した。
Triton X-100/PBS(-)で200倍希釈した吸着済み2次抗体のヤギ抗ヒトIgG(H+L)-Alexa Fluor 488(Life technology社, A-11013 lot 2110842)と200倍希釈したロバ抗ウサギIgG-Alexa647(Life technology社,A31573, lot 1626613)を0.5ml/wellずつ添加し、室温、遮光して1時間反応させた。
細胞内へのインターナライズ活性を評価した。BxPC3細胞を用いたFACS解析の結果、ヒト化抗GPC1抗体(T2)およびヒト化抗GPC1-ADCはいずれもBxPC3細胞に添加後、2時間で60から70%以上のGPC1が細胞内に速やかにインターナライズしたことが確認された(図8)。本ADCが抗腫瘍効果を発揮するにはリソソーム内の酵素のカテプシンBによりADCのリンカー部分が切断される必要がある。そこで、細胞内局在について、リソソームマーカーであるCD107aとGPC1との局在を蛍光二重染色法で評価した結果、ヒト化抗GPC1抗体(T2)およびヒト化抗GPC1-ADCはいずれもCD107aと共局在したことから、ヒト化抗GPC1抗体(T2)およびヒト化抗GPC1-ADCはGPC1と結合した後、リソソームに移行することが確認された(図8)。
(材料および方法)
FACSによるGPC1発現解析を行った。
(1)細胞をThermo Fisher Scientific社の96ウェルホワイトプレート(型番136101)にまいた(細胞懸濁液90μL)。培地はRPMI1640+10%FBS+100U/mlペニシリン+100μg/mlストレプトマイシンを使用した(BxPC-3細胞はRPMI1640+10%FBS+1% GlutaMAXTM I +100U/mlペニシリン+100μg/mlストレプトマイシン、Detroit562、FaDu、KONはDMEM+10%FBS+100U/mlペニシリン+100μg/mlストレプトマイシン、Ho-1-u-1はDMEM/F12+10%FBS+100U/mlペニシリン+100μg/mlストレプトマイシンを用いた)。細胞をプレート中央の60ウェルに播種し、培地100μLを外側の36ウェルに添加した。37℃、5%CO2インキュベーターで培養した。
(2)翌日、細胞にADC10μLを加えた(総量100μL)
(3)144時間培養後、CellTiter-Glo(登録商標)Luminescence Cell Viability Assay試薬(Promega社)を100μL/ウェル加え混合した。
(4)プレートリーダーで測定した。
(5)GraphPad Prism6で解析した。
IC50=10^(Log[A][B]×(50C)/(DC)+Log[B])
A:50%を挟む高い濃度
B:50%を挟む低い濃度
C:Bでの阻害率
D:Aでの阻害率。
作成したヒト化GPC1-ADCの薬効を評価するためにGPC1発現が陽性および陰性の細胞株の調製を行った。GPC1陽性の食道がん細胞株としてTE8、TE14、膵臓がん細胞株のBxPC3について、CRISPR/Cas9システムによりGPC1をノックアウトしたTE8-GPC1-KO細胞、TE14-GPC1-KO細胞、BxPC3-GPC1-KO細胞を作成し、FACS解析によりGPC1がノックアウトされていることを確認した(図9)。in vitro ADCアッセイを行った結果、ヒト化GPC1-ADCはGPC1陽性がん細胞株に対して薬効を発揮したが、GPC1陰性がん細胞株には薬効を示さなかったため、ヒト化GPC1-ADCがGPC1発現依存的に薬効を示すことが確認された(図10)。膵臓がん、食道がん細胞株以外に、子宮頸がん、頭頸部腫瘍、口腔扁平上皮がん細胞株に対しても、ヒト化GPC1-ADCはGPC1発現依存的に薬効を示すことが確認された(図11、12)。
(材料および方法)
以下のとおり、膵臓がんPDX(PK565)のGPC1発現の確認を行った。
in vivoにおける薬効試験では、GPC1陽性の膵臓がんPDXマウス(PK565)に対しても、薬剤を1週間毎に合計4回静脈内投与した結果、ヒト化GPC1-ADCは濃度依存的な高い抗腫瘍効果を発揮した(図13)。この際、体重減少など認められなかったため、GPC1-ADCはコントロールADCと比較して特徴的な毒性を示さなかった。このことはin vivoにおいて、抗がん剤を全身投与することと比較して、GPC1-ADCを用いることで抗がん剤をGPC1陽性のがん細胞の特異的にデリバリーすることで、高い薬効と低い毒性を達成することでGPC1陽性のがんに対する画期的な治療薬の開発につながる。
(材料および方法)
以下のとおり、膵臓がんPDX(PK175)のGPC1発現の確認を行った。
in vivoにおける薬効試験では、GPC1陽性の膵臓がんPDXマウス(PK175)に対しても、薬剤を1週間毎に合計4回静脈内投与した結果、ヒト化GPC1-ADCは濃度依存的な高い抗腫瘍効果を発揮した(図14)。この際、体重減少など認められなかったため、GPC1-ADCはコントロールADCと比較して特徴的な毒性を示さなかった。このことはin vivoにおいて、抗がん剤を全身投与することと比較して、GPC1-ADCを用いることで抗がん剤をGPC1陽性のがん細胞の特異的にデリバリーすることで、高い薬効と低い毒性を達成することでGPC1陽性のがんに対する画期的な治療薬の開発につながる。
(材料および方法)
以下のとおり、食道がんPDX(ESCC14)のGPC1発現の確認を行った。
in vivoにおける薬効試験では、GPC1陽性の食道がんPDXマウス(ESCC14)に対しても、薬剤を1週間毎に合計4回静脈内投与した結果、ヒト化GPC1-ADCは濃度依存的な高い抗腫瘍効果を発揮した(図15)。この際、体重減少など認められなかったため、GPC1-ADCはコントロールADCと比較して特徴的な毒性を示さなかった。このことはin vivoにおいて、抗がん剤を全身投与することと比較して、GPC1-ADCを用いることで抗がん剤をGPC1陽性のがん細胞の特異的にデリバリーすることで、高い薬効と低い毒性を達成することでGPC1陽性のがんに対する画期的な治療薬の開発につながる。
(材料および方法)
mGPC1-MC38細胞に対して、ヒト化抗GPC1抗体(clone T2)を1次抗体として用い、2次抗体としてはFITC標識anti-human IgG-FITC(Jackson Immuno research社、型番:109-095-098)を用い、FACS CantoII (BD社)を用いて測定し、測定データはBD FACSDiva software (BD社)を用いて解析した。
MMAEなどADCに用いるペイロードの種類によっては、がん細胞に対してImmunogenic cell death (ICD)を伴う細胞死を誘導することが知られている。ICDを起こしたがん細胞からはdamage-associated molecular patterns (DAMPs)として知られる核内タンパク質のHMGB1などが細胞外に放出され、TLR-4を介した樹状細胞の成熟・活性化が促進される抗原特異的T細胞が腫瘍内に浸潤し、抗腫瘍効果を発揮する。そのため、ヒト化GPC1-ADCと免疫チェックポイント阻害剤を併用することで、相乗的な抗腫瘍効果が得られることが期待される。そこで、MC38(マウス大腸がん細胞株)にマウスGPC1を安定発現させたMC38-mGPC1を用いてin vitroおよびシンジェニックマウスを用いたin vivoでの実験を実施した。ヒト化抗GPC1-ADCはMC38-mGPC1に対してin vitroで細胞増殖阻害活性を示した(図16)。
(材料および方法)
MC38-mGPC1にcontrol-ADC、ヒト化GPC1-ADCおよびMMAEをin vitroで添加し、48時間後に培養上清を回収した。培養上清中のHMGB-1の濃度はHMGB1 ELISA KIT II - HMGB1測定試薬(シノテスト社、型番SNO-326054329)を用いて実施した。
MC38-mGPC1に実施例4において作製したヒト化抗GPC1-ADCを添加し、ELISA法にて培養上清中のHMGB1を定量した結果、HMGB1の細胞外放出が誘導されていることが確認された(図17)。HMGB1(high mobility group box-1)はDAMPs(損傷関連分子パターン)の1つとして知られている核内タンパク質である。ある種の抗がん剤はがん細胞が細胞死を起こす際にHMGB1を細胞外に放出するため、免疫原性細胞死(immunogenic cell death)の指標として知られている。細胞外に放出されたHMGB1は樹状細胞上のTLR4と結合することで樹状細胞の活性化、成熟化を促進し、その結果、T細胞の腫瘍組織への浸潤などが促進される。
(材料および方法)
8週齢のC57BL/6雌性マウスにMC38-mGPC1を皮下移植し、移植後腫瘍サイズが約75mm3となったところで4群に分け、PBS、実施例4において作製したヒト化抗GPC1-ADC(MMAE)(10mg/kg)、抗マウスPD1抗体(clone RMP1-14)(3mg/kg)、ヒト化抗GPC1-ADC(MMAE)(10mg/kg)+抗マウスPD1抗体(clone RMP1-14)(3mg/kg)の投与を開始した。投与を開始した日を0日目として、0日目、3日目、7日目および10日目にADCは静脈内投与し、抗マウスPD1抗体は腹腔内投与した。腫瘍体積および体重を0日目以降週2回の頻度で21日目まで計測した。
MC38-mGPC1をC57BL/6マウス皮下に移植したシンジェニックモデルに対して、Vehicle control、ヒト化抗GPC1-ADC、抗PD1抗体、ヒト化抗GPC1-ADC+抗PD1抗体の4群に分け、薬剤を週2回の頻度で合計4回投与し、抗腫瘍効果を評価した。その結果、ヒト化GPC1-ADCと抗PD1抗体は単剤投与群と比較し、併用投与群において有意な抗腫瘍効果が認められた。一方で、ヒト化GPC1-ADCと抗PD1抗体の併用投与による体重減少は認められなかった(図18)。これらの結果、ヒト化GPC1-ADCはチェックポイント阻害剤との併用にすることで相乗的な抗腫瘍効果が得られることが期待される。
6週齢のNOG雌性マウスに膵臓がんPDX(PK565)を皮下移植し、移植後腫瘍サイズが約100mm3となったところで、PBS、コントロールADC(10mg/kg)および、実施例4において作製したヒト化抗GPC1-ADC(MMAE)(1mg/kg)、(3mg/kg)、(10mg/kg)を投与した。投与24時間後に腫瘍を摘出した。摘出した組織は10%中性ホルマリン緩衝液で固定した後、パラフィン包埋組織を作成し、薄切を調製した。それぞれの薄切について、G2/M期での細胞周期が停止したがん細胞を評価するために、phospho-histone H3(Ser10)の発現を免疫組織化学染色法により解析した。
その結果、PBS、および、コントロールADC(10mg/kg)投与群と比較して、ヒト化抗GPC1-ADC(MMAE)投与群では濃度依存的にG2/M期において細胞周期が停止したがん細胞の割合が有意に増加したことが確認された(図19)。ADCのペイロードががん細胞に作用してG2/M期にて細胞周期を停止させるとがん細胞の増殖が停止し、がん患者の生存期間延長に貢献し得る。
膵臓がんにおいてはリンパ節転移や肝転移など遠隔転移が予後不良因子として知られている。そこで、GPC1が膵臓がんの原発巣だけでなく、遠隔転移巣においても発現していれば治療標的として有用性が高いと考えられる。そこで、膵臓がんのリンパ節転移、肝転移、副腎転移組織に対して、免疫組織化学染色法によりGPC1の発現を評価した。その結果、膵臓がんのリンパ節転移、肝転移、副腎転移のいずれの組織においてもGPC1の発現が陽性であることが確認された(図20)。したがって、本願発明のヒト化GPC1-ADC(MMAE)は、GPC1陽性がんの転移性がんの治療または予防に有効であることが示唆される。
図21に示した手順で、BxPC3-Luc細胞をSCIDマウスの脾臓内に投与し、投与1~2週間後に脾臓を摘出することで膵臓がん肝転移モデルを作製した。IVISを用いてルシフェラーゼ活性を測定することで肝臓内に転移したBxPC3-Luc細胞の増殖をモニターした。肝転移モデルマウスをPBS投与群と、実施例4において作製したヒト化抗GPC1-ADC(MMAE)(10mg/kg)投与群の2群に分け、実施例16と同様の手順で薬効試験を行った。
その結果、図22の左に示すようにIVISにより計測した発酵の値はPBS投与群と比較し、ヒト化抗GPC1-ADC(MMAE)(10mg/kg)投与群では有意に阻害されていた。また、生存解析を行った結果、ヒト化抗GPC1-ADC(MMAE)(10mg/kg)は膵臓がん肝転移モデルの生存期間を有意に延長することが確認された。
肝臓、肺、脳、骨、腹膜、副腎などに転移する転移モデルを作成し、転移モデルにおけるヒト化GPC1-ADCによる薬効を確認する。ヒト化GPC1-ADCは原発と転移巣の両方に対して薬効を発揮し、生存期間の延長効果が期待される。
本願発明のヒト化抗GPC1-ADC(MMAE)は、以下の静脈内注射用製剤として提供され得る。
ヒト化抗GPC1-ADC 100mg
ポリソルベート80 5mg
塩化ナトリウム 100mg
クエン酸ナトリウム水和物 80mg
pH調整剤 適量
全量 10mL
配列番号2:ヒトGlypican-1のアミノ酸配列
配列番号3:マウスGlypican-1の核酸配列
配列番号4:マウスGlypican-1のアミノ酸配列
配列番号5:01a033重鎖可変領域のアミノ酸配列
配列番号6:01a033軽鎖可変領域のアミノ酸配列
配列番号7:ヒト化重鎖可変領域のアミノ酸配列
配列番号8:クローンT2のヒト化軽鎖可変領域のアミノ酸配列
配列番号9:クローンT7のヒト化軽鎖可変領域のアミノ酸配列
配列番号10:クローンT8のヒト化軽鎖可変領域のアミノ酸配列
配列番号11:クローンT1のヒト化軽鎖可変領域のアミノ酸配列
配列番号12:クローンT36のヒト化軽鎖可変領域のアミノ酸配列
配列番号13:クローンT57のヒト化軽鎖可変領域のアミノ酸配列
配列番号14:クローンT10のヒト化軽鎖可変領域のアミノ酸配列
配列番号15:クローンT34のヒト化軽鎖可変領域のアミノ酸配列
配列番号16:クローンT56のヒト化軽鎖可変領域のアミノ酸配列
配列番号17:クローンT3のヒト化軽鎖可変領域のアミノ酸配列
配列番号18:クローンT11のヒト化軽鎖可変領域のアミノ酸配列
配列番号19:クローンT28のヒト化軽鎖可変領域のアミノ酸配列
配列番号20:クローンT43のヒト化軽鎖可変領域のアミノ酸配列
配列番号21:クローンT59のヒト化軽鎖可変領域のアミノ酸配列
配列番号22:クローンT31のヒト化軽鎖可変領域のアミノ酸配列
配列番号23:クローンT22のヒト化軽鎖可変領域のアミノ酸配列
配列番号24:クローンT26のヒト化軽鎖可変領域のアミノ酸配列
配列番号25:クローンT32のヒト化軽鎖可変領域のアミノ酸配列
配列番号26:クローンT33のヒト化軽鎖可変領域のアミノ酸配列
配列番号27:クローンT29のヒト化軽鎖可変領域のアミノ酸配列
配列番号28:ヒト化重鎖の重鎖CDR1のアミノ酸
配列番号29:ヒト化重鎖の重鎖CDR2のアミノ酸
配列番号30:ヒト化重鎖の重鎖CDR3のアミノ酸
配列番号31:クローンT2の軽鎖CDR1のアミノ酸配列
配列番号32:クローンT2の軽鎖CDR2のアミノ酸配列
配列番号33:クローンT2の軽鎖CDR3のアミノ酸配列
配列番号34:クローンT7の軽鎖CDR1のアミノ酸配列
配列番号35:クローンT7の軽鎖CDR2のアミノ酸配列
配列番号36:クローンT7の軽鎖CDR3のアミノ酸配列
配列番号37:クローンT8の軽鎖CDR1のアミノ酸配列
配列番号38:クローンT8の軽鎖CDR2のアミノ酸配列
配列番号39:クローンT8の軽鎖CDR3のアミノ酸配列
配列番号40:クローンT1の軽鎖CDR1のアミノ酸配列
配列番号41:クローンT1の軽鎖CDR2のアミノ酸配列
配列番号42:クローンT1の軽鎖CDR3のアミノ酸配列
配列番号43:クローンT36の軽鎖CDR1のアミノ酸配列
配列番号44:クローンT36の軽鎖CDR2のアミノ酸配列
配列番号45:クローンT36の軽鎖CDR3のアミノ酸配列
配列番号46:クローンT57の軽鎖CDR1のアミノ酸配列
配列番号47:クローンT57の軽鎖CDR2のアミノ酸配列
配列番号48:クローンT57の軽鎖CDR3のアミノ酸配列
配列番号49:クローンT10の軽鎖CDR1のアミノ酸配列
配列番号50:クローンT10の軽鎖CDR2のアミノ酸配列
配列番号51:クローンT10の軽鎖CDR3のアミノ酸配列
配列番号52:クローンT34の軽鎖CDR1のアミノ酸配列
配列番号53:クローンT34の軽鎖CDR2のアミノ酸配列
配列番号54:クローンT34の軽鎖CDR3のアミノ酸配列
配列番号55:クローンT56の軽鎖CDR1のアミノ酸配列
配列番号56:クローンT56の軽鎖CDR2のアミノ酸配列
配列番号57:クローンT56の軽鎖CDR3のアミノ酸配列
配列番号58:クローンT3の軽鎖CDR1のアミノ酸配列
配列番号59:クローンT3の軽鎖CDR2のアミノ酸配列
配列番号60:クローンT3の軽鎖CDR3のアミノ酸配列
配列番号61:クローンT11の軽鎖CDR1のアミノ酸配列
配列番号62:クローンT11の軽鎖CDR2のアミノ酸配列
配列番号63:クローンT11の軽鎖CDR3のアミノ酸配列
配列番号64:クローンT28の軽鎖CDR1のアミノ酸配列
配列番号65:クローンT28の軽鎖CDR2のアミノ酸配列
配列番号66:クローンT28の軽鎖CDR3のアミノ酸配列
配列番号67:クローンT43の軽鎖CDR1のアミノ酸配列
配列番号68:クローンT43の軽鎖CDR2のアミノ酸配列
配列番号69:クローンT43の軽鎖CDR3のアミノ酸配列
配列番号70:クローンT59の軽鎖CDR1のアミノ酸配列
配列番号71:クローンT59の軽鎖CDR2のアミノ酸配列
配列番号72:クローンT59の軽鎖CDR3のアミノ酸配列
配列番号73:クローンT31の軽鎖CDR1のアミノ酸配列
配列番号74:クローンT31の軽鎖CDR2のアミノ酸配列
配列番号75:クローンT31の軽鎖CDR3のアミノ酸配列
配列番号76:クローンT22の軽鎖CDR1のアミノ酸配列
配列番号77:クローンT22の軽鎖CDR2のアミノ酸配列
配列番号78:クローンT22の軽鎖CDR3のアミノ酸配列
配列番号79:クローンT26の軽鎖CDR1のアミノ酸配列
配列番号80:クローンT26の軽鎖CDR2のアミノ酸配列
配列番号81:クローンT26の軽鎖CDR3のアミノ酸配列
配列番号82:クローンT32の軽鎖CDR1のアミノ酸配列
配列番号83:クローンT32の軽鎖CDR2のアミノ酸配列
配列番号84:クローンT32の軽鎖CDR3のアミノ酸配列
配列番号85:クローンT33の軽鎖CDR1のアミノ酸配列
配列番号86:クローンT33の軽鎖CDR2のアミノ酸配列
配列番号87:クローンT33の軽鎖CDR3のアミノ酸配列
配列番号88:クローンT29の軽鎖CDR1のアミノ酸配列
配列番号89:クローンT29の軽鎖CDR2のアミノ酸配列
配列番号90:クローンT29の軽鎖CDR3のアミノ酸配列
配列番号91:キメラ抗体およびヒト化抗体の重鎖定常領域のアミノ酸配列
配列番号92:キメラ抗体およびヒト化抗体の軽鎖定常領域のアミノ酸配列
Claims (29)
- 配列番号5に記載のアミノ酸配列を有する重鎖可変領域と配列番号6に記載のアミノ酸配列を有する軽鎖可変領域とを含む抗体に基づきヒト化されたヒト化抗GPC-1抗体またはその抗原結合フラグメントであって、配列番号5に記載のアミノ酸配列を有する重鎖可変領域と配列番号6に記載のアミノ酸配列を有する軽鎖可変領域とを含む抗体と比べて、GPC-1に対して高い親和性を有する、ヒト化抗体またはその抗原結合フラグメント。
- 前記ヒト化抗体またはその抗原結合フラグメントが、
(a)それぞれ配列番号28~30に記載のアミノ酸配列を有する重鎖CDR1~3を含む、または
(b)(a)における重鎖CDR1~3において3個以下のアミノ酸置換、欠失および/または付加を有する、
請求項1に記載の組成物。 - 前記ヒト化抗体またはその抗原結合フラグメントが、
(a)それぞれ配列番号31~33に記載のアミノ酸配列を有する軽鎖CDR1~CDR3を含む、または
(b)それぞれ配列番号34~36に記載のアミノ酸配列を有する軽鎖CDR1~CDR3を含む、または
(c)それぞれ配列番号37~39に記載のアミノ酸配列を有する軽鎖CDR1~CDR3を含む、または
(d)それぞれ配列番号40~42に記載のアミノ酸配列を有する軽鎖CDR1~CDR3を含む、または
(e)それぞれ配列番号43~45に記載のアミノ酸配列を有する軽鎖CDR1~CDR3を含む、または
(f)それぞれ配列番号46~48に記載のアミノ酸配列を有する軽鎖CDR1~CDR3を含む、または
(g)それぞれ配列番号49~51に記載のアミノ酸配列を有する軽鎖CDR1~CDR3を含む、または
(h)それぞれ配列番号52~54に記載のアミノ酸配列を有する軽鎖CDR1~CDR3を含む、または
(i)それぞれ配列番号55~57に記載のアミノ酸配列を有する軽鎖CDR1~CDR3を含む、または
(j)それぞれ配列番号58~60に記載のアミノ酸配列を有する軽鎖CDR1~CDR3を含む、または
(k)それぞれ配列番号61~63に記載のアミノ酸配列を有する軽鎖CDR1~CDR3を含む、または
(l)それぞれ配列番号64~66に記載のアミノ酸配列を有する軽鎖CDR1~CDR3を含む、または
(m)それぞれ配列番号67~69に記載のアミノ酸配列を有する軽鎖CDR1~CDR3を含む、または
(n)それぞれ配列番号70~72に記載のアミノ酸配列を有する軽鎖CDR1~CDR3を含む、または
(o)それぞれ配列番号73~75に記載のアミノ酸配列を有する軽鎖CDR1~CDR3を含む、または
(p)それぞれ配列番号76~78に記載のアミノ酸配列を有する軽鎖CDR1~CDR3を含む、または
(q)それぞれ配列番号79~81に記載のアミノ酸配列を有する軽鎖CDR1~CDR3を含む、または
(r)それぞれ配列番号82~84に記載のアミノ酸配列を有する軽鎖CDR1~CDR3を含む、または
(s)それぞれ配列番号85~87に記載のアミノ酸配列を有する軽鎖CDR1~CDR3を含む、または
(t)それぞれ配列番号88~90に記載のアミノ酸配列を有する軽鎖CDR1~CDR3を含む、または
(u)(a)~(t)のいずれかにおける軽鎖CDR1~3において3個以下のアミノ酸置換、欠失および/または付加を有する、
請求項1または2に記載のヒト化抗体またはその抗原結合フラグメント。 - 配列番号7に記載のアミノ酸配列と少なくとも90%同一のアミノ酸配列を有する重鎖可変領域を含む、請求項1~3のいずれか一項に記載のヒト化抗体またはその抗原結合フラグメント。
- 配列番号8~27に記載のアミノ酸配列からなる群から選択されるアミノ酸配列と少なくとも90%同一のアミノ酸配列を有する軽鎖可変領域を含む、請求項1~4のいずれか一項に記載のヒト化抗体またはその抗原結合フラグメント。
- 配列番号8~27に記載のアミノ酸配列からなる群から選択されるアミノ酸配列を有する軽鎖可変領域を含む、請求項1~5のいずれか一項に記載のヒト化抗体またはその抗原結合フラグメント。
- 配列番号8~17に記載のアミノ酸配列からなる群から選択されるアミノ酸配列と少なくとも90%同一のアミノ酸配列を有する軽鎖可変領域を含む、請求項1~6のいずれか一項に記載のヒト化抗体またはその抗原結合フラグメント。
- 配列番号8~17に記載のアミノ酸配列からなる群から選択されるアミノ酸配列を有する軽鎖可変領域を含む、請求項1~7のいずれか一項に記載のヒト化抗体またはその抗原結合フラグメント。
- 前記抗体のエピトープが、配列番号2の339~358位および/もしくは388~421位を含む、請求項1~8のいずれか一項に記載のヒト化抗体またはその抗原結合フラグメント。
- 前記抗体が、表面プラズモン共鳴法による解析に基づき1.02E-8以下のKDでGlypican-1に結合する、請求項1~9のいずれか一項に記載のヒト化抗体またはその抗原結合フラグメント。
- 請求項1~10のいずれか一項に記載のヒト化抗体またはその抗原結合フラグメントを含む、有効成分を細胞内移行させるための医薬組成物。
- 請求項1~11のいずれか一項に記載のヒト化抗体またはその抗原結合フラグメントと細胞傷害性活性を有する薬剤との複合体。
- 前記ヒト化抗体またはその抗原結合フラグメントが、前記細胞傷害性活性を有する薬剤とリンカーを介して作動可能に連結されている、請求項12に記載の複合体。
- 前記細胞傷害性活性を有する薬剤が、モノメチルアウリスタチンE(MMAE)、モノメチルアウリスタチンF(MMAF)、DM1、DM4、カリケアマイシン、デュオカルマイシン、ピロロベンゾジアゼピン(PBD)、およびトポイソメラーゼ阻害剤からなる群から選択される、請求項12または13に記載の複合体。
- 前記細胞傷害性活性を有する薬剤が、細胞膜透過性である、請求項13または14に記載の複合体。
- 前記細胞傷害性活性を有する薬剤が、MMAE、PBD、Eribulin、SN-38、Dxd、およびDM4から選択される、請求項13~15のいずれか一項に記載の複合体。
- 前記リンカーが、酵素切断型リンカー、酸不安定性リンカー、およびジスルフィドリンカーからなる群から選択される、請求項13~16のいずれか一項に記載の複合体。
- 前記リンカーが、カテプシンBにより切断される切断型リンカーである、請求項13~17のいずれか一項に記載の複合体。
- 前記複合体が、Glypican-1陽性細胞において、約0.1nM以下のIC50を示す、請求項12~18のいずれか一項に記載の複合体。
- 請求項12~19のいずれか一項に記載の複合体を含む、Glypican-1陽性がんを予防または治療するための組成物。
- 前記Glypican-1陽性がんは、食道がん、膵臓がん、胆管がん、子宮頸がん、肺がん、頭頸部がん、乳がん、子宮平滑筋肉腫、前立腺がん、口腔扁平上皮がんまたはこれらの任意の組合せから選択される、請求項20に記載の組成物。
- 前記Glypican-1陽性がんは、食道がんまたは膵臓がんである、請求項20または21に記載の組成物。
- 前記がんは、がん関連線維芽細胞(CAF)を有する、請求項20~22のいずれか一項に記載の組成物。
- 前記組成物が、免疫チェックポイント阻害剤と一緒に投与されることを特徴とする、請求項20~23のいずれか一項に記載の組成物。
- 前記免疫チェックポイント阻害剤が、抗PD-1抗体である、請求項24に記載の組成物。
- 請求項12~19のいずれか一項に記載の複合体を含む、Glypican-1陽性がんの転移性がんを予防または治療するための組成物。
- 前記Glypican-1陽性がんは、食道がん、膵臓がん、胆管がん、子宮頸がん、肺がん、頭頸部がん、乳がん、子宮平滑筋肉腫、前立腺がん、口腔扁平上皮がん、またはこれらの任意の組合せから選択される、請求項26に記載の組成物。
- 前記転移性がんが、膵臓がんの転移性がんである、請求項26または27に記載の組成物。
- 前記転移性がんが、肝臓、食道、胆管、子宮頸、肺、頭頸部、乳房、子宮平滑筋、前立腺、口腔扁平上皮、脳、骨、腹膜、または副腎に転移した転移性がんである、請求項26~28のいずれか一項に記載の組成物。
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| US18/009,024 US20230250188A1 (en) | 2020-06-11 | 2021-06-10 | Humanized Anti-GPC-1 Antibody |
| EP21823133.0A EP4163301B1 (en) | 2020-06-11 | 2021-06-10 | Humanized anti-gpc-1 antibody |
| ES21823133T ES3047733T3 (en) | 2020-06-11 | 2021-06-10 | Humanized anti-gpc-1 antibody |
| JP2022530617A JP7659326B2 (ja) | 2020-06-11 | 2021-06-10 | ヒト化抗gpc-1抗体 |
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| IT202200021546A1 (it) | 2022-10-19 | 2024-04-19 | Centro Di Riferimento Oncologico Di Aviano | Anticorpo monoclonale anti-GPC1, suoi usi terapeutici e diagnostici |
| WO2025202359A1 (en) * | 2024-03-27 | 2025-10-02 | Adcendo Aps | Anti-gpc1 antibodies and uses thereof |
| WO2025202361A1 (en) * | 2024-03-27 | 2025-10-02 | Adcendo Aps | Anti-gpc1 antibodies and uses thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT202200021546A1 (it) | 2022-10-19 | 2024-04-19 | Centro Di Riferimento Oncologico Di Aviano | Anticorpo monoclonale anti-GPC1, suoi usi terapeutici e diagnostici |
| WO2024083921A1 (en) | 2022-10-19 | 2024-04-25 | Centro Di Riferimento Oncologico Di Aviano | Anti-gpc1 monoclonal antibody, therapeutic and diagnostic uses thereof |
| WO2025202359A1 (en) * | 2024-03-27 | 2025-10-02 | Adcendo Aps | Anti-gpc1 antibodies and uses thereof |
| WO2025202361A1 (en) * | 2024-03-27 | 2025-10-02 | Adcendo Aps | Anti-gpc1 antibodies and uses thereof |
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| EP4163301A1 (en) | 2023-04-12 |
| EP4163301C0 (en) | 2025-10-01 |
| JPWO2021251459A1 (ja) | 2021-12-16 |
| EP4163301A4 (en) | 2023-12-06 |
| ES3047733T3 (en) | 2025-12-04 |
| US20230250188A1 (en) | 2023-08-10 |
| EP4163301B1 (en) | 2025-10-01 |
| JP7659326B2 (ja) | 2025-04-09 |
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