CDH3 binding protein and use thereof
Antibodies with specific CDR sequences for CDH3 binding address the limitations of current drugs by enhancing specificity and endocytosis, improving clinical efficacy and safety.
Patent Information
- Application Number
- PCT/CN2025/100638
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Priority Date
- 2025-06-05
- Filing Date
- 2025-06-12
- Publication Date
- 2025-12-18
AI Technical Summary
Current CDH3-targeted antibody drugs lack specificity, endocytosis activity, and are associated with toxic side effects, limiting their clinical efficacy and availability.
Development of antibodies with specific CDR sequences that bind to human CDH3 with high affinity and efficient endocytosis, utilizing various numbering systems to define CDRs, including Chothia, AbM, Kabat, and IMGT, with potential mutations for enhanced specificity and reduced toxicity.
The antibodies efficiently enter CDH3-expressing cells, offering improved clinical efficacy and reduced toxicity, providing more medication options for patients.
Smart Images

Figure PCTCN2025100638-FTAPPB-I100001 
Figure PCTCN2025100638-FTAPPB-I100002 
Figure PCTCN2025100638-FTAPPB-I100003
Abstract
Description
CDH3 BINDING PROTEIN AND USE THEREOFTECHNICAL FIELD
[0001] The present disclosure relates to antibodies that specifically bind to CDH3; and further relates to use of the antibody in the treatment and diagnosis of diseases.BACKGROUND
[0002] Cadherin, which is a type of transmembrane-associated glycoprotein, belongs to a family of cell adhesion molecules, and mediates cell-cell adhesion in a calcium ion-dependent manner to allow cells to interact with the environment, thus playing a key role in the morphogenesis of various organs and helping cells communicate with other cells in aspects such as immune surveillance, exosmosis, transport, tumor metastasis, wound healing and tissue positioning. CDH3 (P-cadherin) is involved in several intracellular homeostatic processes for regulating embryonic development and maintaining adult tissue structures, and is very important for cell differentiation, cell shapes, cell polarity, growth and migration. CDH3 plays an important role in protecting the structural integrity of epithelial tissues.
[0003] CDH3 is expressed in several adult tissues, and is generally co-expressed with E-cadherin, such as the epidermal basal layer, breast, and prostate. CDH3 is highly expressed and is associated with poor tumor prognosis in a plurality of tumor tissues, such as breast, ovarian, prostate, endometrial, skin, stomach, pancreas, and colon tumors. PCA062, a CDH3-targeted ADC drug developed by Novartis, showed acceptable safety and preliminary efficacy in phase I clinical trials, but the development was terminated due to causes such as weak antibody endocytosis and toxin-related toxicity. Fujifilm developed an anti-CDH3 antibody-conjugated radionuclide drug 90Y FF-21101, which was observed to have preliminary efficacy in multiple solid tumors, such as ovarian cancer, lung cancer, bile duct cancer and colorectal cancer in phase I clinical trials and have good safety. According to the high expression of CDH3 in a plurality of tumors and the clinical demonstration of the safety and effectiveness of targeted drugs, CDH3 is an ideal therapeutic target.
[0004] At present, CDH3-targeted antibody drugs are not available on the market. Therefore, it is urgent and necessary to develop a CDH3-targeted antibody with a higher specificity, a higher endocytosis activity, a lower toxic side effect, a better clinical efficacy, and a more convenient administration method, which will provide patients with more medication options.SUMMARY
[0005] The present disclosure provides an antibody that specifically binds to human CDH3 with a high affinity and is efficiently endocytosed to enter cells expressing CDH3.
[0006] The present disclosure provides an antibody or an antigen-binding fragment thereof specifically binding to CDH3 comprising complementarity determining regions (CDRs) as follows: (a) CDR-H1, CDR-H2 and CDR-H3 amino acid sequences of a heavy chain variable region (VH) amino acid sequence set forth in SEQ ID NO: 3 or 1; and / or CDR-L1, CDR-L2 and CDR-L3 amino acid sequences of a light chain variable region (VL) amino acid sequence set forth in SEQ ID NO: 4 or 2; (b) CDR-H1, CDR-H2 and CDR-H3 amino acid sequences of a VH amino acid sequence set forth in SEQ ID NO: 7 or 5; and / or CDR-L1, CDR-L2 and CDR-L3 amino acid sequences of a VL amino acid sequence set forth in SEQ ID NO: 8 or 6; (c) CDR-H1, CDR-H2 and CDR-H3 amino acid sequences of a VH amino acid sequence set forth in SEQ ID NO: 11 or 9; and / or CDR-L1, CDR-L2 and CDR-L3 amino acid sequences of a VL amino acid sequence set forth in SEQ ID NO: 12 or 10; (d) CDR-H1, CDR-H2 and CDR-H3 amino acid sequences of a VH amino acid sequence set forth in SEQ ID NO: 15 or 13; and / or CDR-L1, CDR-L2 and CDR-L3 amino acid sequences of a VL amino acid sequence set forth in SEQ ID NO: 14 or 12; or (e) CDR-H1, CDR-H2 and CDR-H3 amino acid sequences of a VH and / or CDR-L1, CDR-L2 and CDR-L3 amino acid sequences of a VL, wherein at least one CDR of the VH and / or the VL comprises a mutation compared to the VH and / or the VL of any one of (a) - (d) , and the mutation is a substitution, deletion or addition of one or several amino acids (for example, a substitution, deletion or addition of 1, 2, or 3 amino acids) ; which in particular embodiments, the substitution is a conservative substitution.
[0007] In certain embodiments, the antibody or the antigen-binding fragment comprises: (a) CDR-H1, CDR-H2 and CDR-H3 amino acid sequences of the VH amino acid sequence set forth in SEQ ID NO: 3; and CDR-L1, CDR-L2 and CDR-L3 amino acid sequences of the VL amino acid sequence set forth in SEQ ID NO: 4; (b) CDR-H1, CDR-H2 and CDR-H3 amino acid sequences of the VH amino acid sequence set forth in SEQ ID NO: 1; and CDR-L1, CDR-L2 and CDR-L3 amino acid sequences of the VL amino acid sequence set forth in SEQ ID NO: 2; (c) CDR-H1, CDR-H2 and CDR-H3 amino acid sequences of the VH amino acid sequence set forth in SEQ ID NO: 7; and CDR-L1, CDR-L2 and CDR-L3 amino acid sequences of the VL amino acid sequence set forth in SEQ ID NO: 8; (d) CDR-H1, CDR-H2 and CDR-H3 amino acid sequences of the VH amino acid sequence set forth in SEQ ID NO: 5; and CDR-L1, CDR-L2 and CDR-L3 amino acid sequences of the VL amino acid sequence set forth in SEQ ID NO: 6; (e) CDR-H1, CDR-H2 and CDR-H3 amino acid sequences of the VH amino acid sequence set forth in SEQ ID NO: 11; and CDR-L1, CDR-L2 and CDR-L3 amino acid sequences of the VL amino acid sequence set forth in SEQ ID NO: 12; (f) CDR-H1, CDR-H2 and CDR-H3 amino acid sequences of the VH amino acid sequence set forth in SEQ ID NO: 9; and CDR-L1, CDR-L2 and CDR-L3 amino acid sequences of the VL amino acid sequence set forth in SEQ ID NO: 10; (g) CDR-H1, CDR-H2 and CDR-H3 amino acid sequences of the VH amino acid sequence set forth in SEQ ID NO: 15; and CDR-L1, CDR-L2 and CDR-L3 amino acid sequences of the VL amino acid sequence set forth in SEQ ID NO: 16; or (h) CDR-H1, CDR-H2 and CDR-H3 amino acid sequences of the VH amino acid sequence set forth in SEQ ID NO: 13; and CDR-L1, CDR-L2 and CDR-L3 amino acid sequences of the VL amino acid sequence set forth in SEQ ID NO: 14.
[0008] In certain embodiments, the antibody or the antigen-binding fragment thereof comprises: (1) the following VH and / or VL, wherein the CDRs are defined according to the Chothia numbering system: (1a) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 17 or a variant thereof; a CDR-H2 comprising the amino acid sequence of SEQ ID NO: 27 or a variant thereof; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 32 or a variant thereof; and / or VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 35 or a variant thereof; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 38 or a variant thereof; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 42 or a variant thereof; (1b) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 17 or a variant thereof; a CDR-H2 comprising the amino acid sequence of SEQ ID NO: 22 or a variant thereof; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 32 or a variant thereof; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 35 or a variant thereof; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 38 or a variant thereof; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 42 or a variant thereof; (1c) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 44 or a variant thereof; a CDR-H2 comprising the amino acid sequence of SEQ ID NO: 49 or a variant thereof; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 55 or a variant thereof; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 58 or a variant thereof; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 63 or a variant thereof; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 66 or a variant thereof; (1d) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 44 or a variant thereof; a CDR-H2 comprising the amino acid sequence of SEQ ID NO: 49 or a variant thereof; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 55 or a variant thereof; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 58 or a variant thereof; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 61 or a variant thereof; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 66 or a variant thereof; (1e) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 68 or a variant thereof; a CDR-H2 comprising the amino acid sequence of SEQ ID NO: 73 or a variant thereof; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 80 or a variant thereof; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 84 or a variant thereof; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 88 or a variant thereof; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 91 or a variant thereof; (1f) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 68 or a variant thereof; a CDR-H2 comprising the amino acid sequence of SEQ ID NO: 73 or a variant thereof; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 80 or a variant thereof; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 83 or a variant thereof; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 87 or a variant thereof; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 91 or a variant thereof; (1g) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 93 or a variant thereof; a CDR-H2 comprising the amino acid sequence of SEQ ID NO: 103 or a variant thereof; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 108 or a variant thereof; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 114 or a variant thereof; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 117 or a variant thereof; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 119 or a variant thereof; (1h) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 93 or a variant thereof; a CDR-H2 comprising the amino acid sequence of SEQ ID NO: 98 or a variant thereof; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 108 or a variant thereof; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 111 or a variant thereof; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 117 or a variant thereof; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 119 or a variant thereof; or (2) the following VH and / or VL, wherein the CDRs are defined according to the AbM numbering system: (2a) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 18 or a variant thereof; a CDR-H2 comprising the amino acid sequence of SEQ ID NO: 28 or a variant thereof; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 32 or a variant thereof; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 35 or a variant thereof; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 38 or a variant thereof; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 42 or a variant thereof; (2b) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 18 or a variant thereof; a CDR-H2 comprising the amino acid sequence of SEQ ID NO: 23 or a variant thereof; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 32 or a variant thereof; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 35 or a variant thereof; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 38 or a variant thereof; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 42 or a variant thereof; (2c) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 45 or a variant thereof; a CDR-H2 comprising the amino acid sequence of SEQ ID NO: 50 or a variant thereof; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 55 or a variant thereof; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 58 or a variant thereof; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 63 or a variant thereof; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 66 or a variant thereof; (2d) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 45 or a variant thereof; a CDR-H2 comprising the amino acid sequence of SEQ ID NO: 50 or a variant thereof; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 55 or a variant thereof; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 58 or a variant thereof; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 61 or a variant thereof; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 66 or a variant thereof; (2e) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 69 or a variant thereof; a CDR-H2 comprising the amino acid sequence of SEQ ID NO: 74 or a variant thereof; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 80 or a variant thereof; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 84 or a variant thereof; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 88 or a variant thereof; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 91 or a variant thereof; (2f) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 69 or a variant thereof; a CDR-H2 comprising the amino acid sequence of SEQ ID NO: 74 or a variant thereof; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 80 or a variant thereof; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 83 or a variant thereof; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 87 or a variant thereof; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 91 or a variant thereof; (2g) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 94 or a variant thereof; a CDR-H2 comprising the amino acid sequence of SEQ ID NO: 104 or a variant thereof; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 108 or a variant thereof; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 114 or a variant thereof; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 117 or a variant thereof; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 119 or a variant thereof; or (2h) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 94 or a variant thereof; a CDR-H2 comprising the amino acid sequence of SEQ ID NO: 99 or a variant thereof; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 108 or a variant thereof; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 111 or a variant thereof; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 117 or a variant thereof; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 119 or a variant thereof; or (3) the following VH and / or VL, wherein the CDRs are defined according to the Kabat numbering system: (3a) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 19 or a variant thereof; a CDR-H2 comprising the amino acid sequence of SEQ ID NO: 29 or a variant thereof; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 32 or a variant thereof; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 35 or a variant thereof; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 38 or a variant thereof; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 42 or a variant thereof; (3b) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 19 or a variant thereof; a CDR-H2 comprising the amino acid sequence of SEQ ID NO: 24 or a variant thereof; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 32 or a variant thereof; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 35 or a variant thereof; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 38 or a variant thereof; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 42 or a variant thereof; (3c) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 46 or a variant thereof; a CDR-H2 comprising the amino acid sequence of SEQ ID NO: 52 or a variant thereof; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 55 or a variant thereof; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 58 or a variant thereof; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 63 or a variant thereof; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 66 or a variant thereof; (3d) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 46 or a variant thereof; a CDR-H2 comprising the amino acid sequence of SEQ ID NO: 51 or a variant thereof; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 55 or a variant thereof; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 58 or a variant thereof; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 61 or a variant thereof; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 66 or a variant thereof; (3e) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 70 or a variant thereof; a CDR-H2 comprising the amino acid sequence of SEQ ID NO: 77 or a variant thereof; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 80 or a variant thereof; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 84 or a variant thereof; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 88 or a variant thereof; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 91 or a variant thereof; (3f) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 70 or a variant thereof; a CDR-H2 comprising the amino acid sequence of SEQ ID NO: 75 or a variant thereof; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 80 or a variant thereof; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 83 or a variant thereof; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 87 or a variant thereof; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 91 or a variant thereof; (3g) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 95 or a variant thereof; a CDR-H2 comprising the amino acid sequence of SEQ ID NO: 105 or a variant thereof; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 108 or a variant thereof; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 114 or a variant thereof; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 117 or a variant thereof; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 119 or a variant thereof; or (3h) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 95 or a variant thereof; a CDR-H2 comprising the amino acid sequence of SEQ ID NO: 100 or a variant thereof; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 108 or a variant thereof; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 111 or a variant thereof; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 117 or a variant thereof; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 119 or a variant thereof; or (4) the following VH and / or VL, wherein the CDRs are defined according to the Contact numbering system: (4a) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 20 or a variant thereof; a CDR-H2 comprising the amino acid sequence of SEQ ID NO: 30 or a variant thereof; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 33 or a variant thereof; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 36 or a variant thereof; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 40 or a variant thereof; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 43 or a variant thereof; (4b) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 20 or a variant thereof; a CDR-H2 comprising the amino acid sequence of SEQ ID NO: 25 or a variant thereof; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 33 or a variant thereof; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 36 or a variant thereof; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 39 or a variant thereof; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 43 or a variant thereof; (4c) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 47 or a variant thereof; a CDR-H2 comprising the amino acid sequence of SEQ ID NO: 53 or a variant thereof; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 56 or a variant thereof; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 59 or a variant thereof; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 64 or a variant thereof; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 67 or a variant thereof; (4d) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 47 or a variant thereof; a CDR-H2 comprising the amino acid sequence of SEQ ID NO: 53 or a variant thereof; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 56 or a variant thereof; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 59 or a variant thereof; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 62 or a variant thereof; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 67 or a variant thereof; (4e) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 71 or a variant thereof; a CDR-H2 comprising the amino acid sequence of SEQ ID NO: 78 or a variant thereof; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 81 or a variant thereof; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 85 or a variant thereof; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 89 or a variant thereof; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 92 or a variant thereof; (4f) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 71 or a variant thereof; a CDR-H2 comprising the amino acid sequence of SEQ ID NO: 76 or a variant thereof; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 81 or a variant thereof; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 85 or a variant thereof; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 89 or a variant thereof; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 92 or a variant thereof; (4g) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 96 or a variant thereof; a CDR-H2 comprising the amino acid sequence of SEQ ID NO: 106 or a variant thereof; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 109 or a variant thereof; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 115 or a variant thereof; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 118 or a variant thereof; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 120 or a variant thereof; or (4h) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 96 or a variant thereof; a CDR-H2 comprising the amino acid sequence of SEQ ID NO: 101 or a variant thereof; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 109 or a variant thereof; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 112 or a variant thereof; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 118 or a variant thereof; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 120 or a variant thereof; or (5) the following VH and / or VL, wherein the CDRs are defined according to the IMGT numbering system: (5a) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 21 or a variant thereof; a CDR-H2 comprising the amino acid sequence of SEQ ID NO: 31 or a variant thereof; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 34 or a variant thereof; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 37 or a variant thereof; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 41 or a variant thereof; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 42 or a variant thereof; (5b) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 21 or a variant thereof; a CDR-H2 comprising the amino acid sequence of SEQ ID NO: 26 or a variant thereof; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 34 or a variant thereof; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 37 or a variant thereof; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 41 or a variant thereof; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 42 or a variant thereof; (5c) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 48 or a variant thereof; a CDR-H2 comprising the amino acid sequence of SEQ ID NO: 54 or a variant thereof; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 57 or a variant thereof; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 60 or a variant thereof; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 65 or a variant thereof; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 66 or a variant thereof; (5d) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 72 or a variant thereof; a CDR-H2 comprising the amino acid sequence of SEQ ID NO: 79 or a variant thereof; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 82 or a variant thereof; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 86 or a variant thereof; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 90 or a variant thereof; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 91 or a variant thereof; (5e) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 97 or a variant thereof; a CDR-H2 comprising the amino acid sequence of SEQ ID NO: 107 or a variant thereof; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 110 or a variant thereof; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 116 or a variant thereof; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 41 or a variant thereof; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 119 or a variant thereof; or (5f) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 97 or a variant thereof; a CDR-H2 comprising the amino acid sequence of SEQ ID NO: 102 or a variant thereof; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 110 or a variant thereof; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 113 or a variant thereof; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 41 or a variant thereof; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 119 or a variant thereof; wherein the variant of any one of (1a) , (1b) , (1c) , (1d) , (1e) , (1f) , (1g) , (1h) , (2a) , (2b) , (2c) , (2d) , (2e) , (2f) , (2g) , (2h) , (3a) , (3b) , (3c) , (3d) , (3e) , (3f) , (3g) , (3h) , (4a) , (4b) , (4c) , (4d) , (4e) , (4f) , (4g) , (4h) , (5a) , (5b) , (5c) , (5d) , (5e) and (5f) has a substitution, deletion or addition of one or several amino acids (for example, a substitution, deletion or addition of 1, 2, or 3 amino acids) compared to the sequence from which it is derived.
[0009] In certain embodiments, the substitution is a conservative substitution.
[0010] In certain embodiments, the antibody or the antigen-binding fragment thereof comprises: (1) the following VH and / or VL, wherein the CDRs are defined according to the Chothia numbering system: (1a) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 17; a CDR- H2 comprising the amino acid sequence of SEQ ID NO: 27; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 32; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 35; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 38; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 42; (1b) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 17; a CDR- H2 comprising the amino acid sequence of SEQ ID NO: 22; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 32; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 35; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 38; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 42; (1c) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 44; a CDR- H2 comprising the amino acid sequence of SEQ ID NO: 49; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 55; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 58; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 63; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 66; (1d) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 44; a CDR- H2 comprising the amino acid sequence of SEQ ID NO: 49; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 55; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 58; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 61; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 66; (1e) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 68; a CDR- H2 comprising the amino acid sequence of SEQ ID NO: 73; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 80; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 84; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 88; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 91; (1f) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 68; a CDR- H2 comprising the amino acid sequence of SEQ ID NO: 73; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 80; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 83; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 87; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 91; (1g) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 93; a CDR- H2 comprising the amino acid sequence of SEQ ID NO: 103; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 108; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 114; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 117; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 119; or (1h) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 93; a CDR- H2 comprising the amino acid sequence of SEQ ID NO: 98; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 108; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 111; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 117; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 119; or (2) the following VH and / or VL, wherein the CDRs are defined according to the AbM numbering system: (2a) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 18; a CDR- H2 comprising the amino acid sequence of SEQ ID NO: 28; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 32; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 35; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 38; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 42; (2b) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 18; a CDR- H2 comprising the amino acid sequence of SEQ ID NO: 23; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 32; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 35; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 38; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 42; (2c) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 45; a CDR- H2 comprising the amino acid sequence of SEQ ID NO: 50; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 55; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 58; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 63; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 66; (2d) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 45; a CDR- H2 comprising the amino acid sequence of SEQ ID NO: 50; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 55; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 58; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 61; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 66; (2e) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 69; a CDR- H2 comprising the amino acid sequence of SEQ ID NO: 74; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 80; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 84; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 88; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 91; (2f) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 69; a CDR- H2 comprising the amino acid sequence of SEQ ID NO: 74; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 80; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 83; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 87; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 91; (2g) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 94; a CDR- H2 comprising the amino acid sequence of SEQ ID NO: 104; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 108; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 114; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 117; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 119; or (2h) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 94; a CDR- H2 comprising the amino acid sequence of SEQ ID NO: 99; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 108; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 111; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 117; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 119; or (3) the following VH and / or VL, wherein the CDRs are defined according to the Kabat numbering system: (3a) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 19; a CDR- H2 comprising the amino acid sequence of SEQ ID NO: 29; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 32; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 35; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 38; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 42; (3b) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 19; a CDR- H2 comprising the amino acid sequence of SEQ ID NO: 24; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 32; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 35; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 38; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 42; (3c) a VH comprising a CDR-H1 comprising the amino acid of SEQ ID NO: 46; a CDR-H2 comprising the amino acid sequence of SEQ ID NO: 52; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 55; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 58; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 63; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 66; (3d) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 46; a CDR- H2 comprising the amino acid sequence of SEQ ID NO: 51; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 55; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 58; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 61; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 66; (3e) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 70; a CDR- H2 comprising the amino acid sequence of SEQ ID NO: 77; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 80; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 84; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 88; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 91; (3f) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 70; a CDR- H2 comprising the amino acid sequence of SEQ ID NO: 75; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 80; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 83; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 87; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 91; (3g) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 95; a CDR- H2 comprising the amino acid sequence of SEQ ID NO: 105; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 108; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 114; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 117; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 119; or (3h) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 95; a CDR- H2 comprising the amino acid sequence of SEQ ID NO: 100; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 108; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 111; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 117; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 119; or (4) the following VH and / or VL, wherein the CDRs are defined according to the Contact numbering system: (4a) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 20; a CDR- H2 comprising the amino acid sequence of SEQ ID NO: 30; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 33; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 36; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 40; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 43; (4b) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 20; a CDR- H2 comprising the amino acid sequence of SEQ ID NO: 25; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 33; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 36; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 39; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 43; (4c) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 47; a CDR- H2 comprising the amino acid sequence of SEQ ID NO: 53; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 56; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 59; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 64; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 67; (4d) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 47; a CDR- H2 comprising the amino acid sequence of SEQ ID NO: 53; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 56; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 59; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 62; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 67; (4e) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 71; a CDR- H2 comprising the amino acid sequence of SEQ ID NO: 78; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 81; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 85; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 89; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 92; (4f) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 71; a CDR- H2 comprising the amino acid sequence of SEQ ID NO: 76; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 81; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 85; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 89; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 92; (4g) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 96; a CDR- H2 comprising the amino acid sequence of SEQ ID NO: 106; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 109; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 115; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 118; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 120; or (4h) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 96; a CDR- H2 comprising the amino acid sequence of SEQ ID NO: 101; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 109; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 112; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 118; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 120; or (5) the following VH and / or VL, wherein the CDRs are defined according to the IMGT numbering system: (5a) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 21; a CDR- H2 comprising the amino acid sequence of SEQ ID NO: 31; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 34; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 37; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 41; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 42; (5b) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 21; a CDR- H2 comprising the amino acid sequence of SEQ ID NO: 26; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 34; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 37; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 41; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 42; (5c) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 48; a CDR- H2 comprising the amino acid sequence of SEQ ID NO: 54; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 57; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 60; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 65; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 66; (5d) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 72; a CDR- H2 comprising the amino acid sequence of SEQ ID NO: 79; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 82; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 86; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 90; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 91; (5e) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 97; a CDR- H2 comprising the amino acid sequence of SEQ ID NO: 107; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 110; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 116; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 41; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 119; or (5f) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 97; a CDR- H2 comprising the amino acid sequence of SEQ ID NO: 102; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 110; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 113; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 41; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 119.
[0011] In certain embodiments, the antibody or the antigen-binding fragment thereof comprises: (a) a VH comprising the amino acid sequence set forth in SEQ ID NO: 3 or a variant thereof and / or a VL comprising the amino acid sequence set forth in SEQ ID NO: 4 or a variant thereof; (b) a VH comprising the amino acid sequence set forth in SEQ ID NO: 1 or a variant thereof and / or a VL comprising the amino acid sequence set forth in SEQ ID NO: 2 or a variant thereof; (c) a VH comprising the amino acid sequence set forth in SEQ ID NO: 7 or a variant thereof and / or a VL comprising the amino acid sequence set forth in SEQ ID NO: 8 or a variant thereof; (d) a VH comprising the amino acid sequence set forth in SEQ ID NO: 5 or a variant thereof and / or a VL comprising the amino acid sequence set forth in SEQ ID NO: 6 or a variant thereof; (e) a VH comprising the amino acid sequence set forth in SEQ ID NO: 11 or a variant thereof and / or a VL comprising the amino acid sequence set forth in SEQ ID NO: 12 or a variant thereof; (f) a VH comprising the amino acid sequence set forth in SEQ ID NO: 9 or a variant thereof and / or a VL comprising the amino acid sequence set forth in SEQ ID NO: 10 or a variant thereof; (g) a VH comprising the amino acid sequence set forth in SEQ ID NO: 15 or a variant thereof and / or a VL comprising the amino acid sequence set forth in SEQ ID NO: 16 or a variant thereof; or (h) a VH comprising the amino acid sequence set forth in SEQ ID NO: 13 or a variant thereof and / or a VL comprising the amino acid sequence set forth in SEQ ID NO: 14 or a variant thereof; wherein the variant has at least 80%, at least 85%, at least 90%, at least 91%, at least 92%, at least 93%, at least 94%, at least 95%, at least 96%, at least 97%, at least 98%, at least 99%or 100%sequence identity compared to the sequence from which it is derived, or has a substitution, deletion or addition of one or several amino acids (for example, a substitution, deletion or addition of 1, 2, 3, 4 or 5 amino acids) compared to the sequence from which it is derived.
[0012] In certain embodiments, the substitution is a conservative substitution.
[0013] In certain embodiments, the antibody or the antigen-binding fragment thereof comprises: (a) a VH comprising the amino acid sequence set forth in SEQ ID NO: 3 and a VL comprising the amino acid sequence set forth in SEQ ID NO: 4; (b) a VH comprising the amino acid sequence set forth in SEQ ID NO: 1 and a VL comprising the amino acid sequence set forth in SEQ ID NO: 2; (c) a VH comprising the amino acid sequence set forth in SEQ ID NO: 7 and a VL comprising the amino acid sequence set forth in SEQ ID NO: 8; (d) a VH comprising the amino acid sequence set forth in SEQ ID NO: 5 and a VL comprising the amino acid sequence set forth in SEQ ID NO: 6; (e) a VH comprising the amino acid sequence set forth in SEQ ID NO: 11 and a VL comprising the amino acid sequence set forth in SEQ ID NO: 12; (f) a VH comprising the amino acid sequence set forth in SEQ ID NO: 9 and a VL comprising the amino acid sequence set forth in SEQ ID NO: 10; (g) a VH comprising the amino acid sequence set forth in SEQ ID NO: 15 and a VL comprising the amino acid sequence set forth in SEQ ID NO: 16; or (h) a VH comprising the amino acid sequence set forth in SEQ ID NO: 13 and a VL comprising the amino acid sequence set forth in SEQ ID NO: 14.
[0014] In certain embodiments the antibody or the antigen-binding fragment thereof is a murine antibody, a chimeric antibody, or a humanized antibody.
[0015] In certain embodiments, the antibody or the antigen-binding fragment thereof further comprises a constant region from or derived from a human immunoglobulin. In certain embodiments, the heavy chain of the antibody or the antigen-binding fragment thereof comprises a heavy chain constant region from or derived from the human immunoglobulin (for example, IgG1, IgG2, IgG3, or IgG4) . In certain embodiments, the antibody or the antigen-binding fragment thereof comprises a wild-type Fc region, or comprises a mutated or chemically modified Fc region having an altered effector function compared to the wild-type Fc region. In certain embodiments, the antibody or the antigen-binding fragment thereof comprises a variant of a human IgG1 heavy chain constant region, and the variant has the following substitutions compared to the wild-type sequence from which it is derived: Leu234Ala, Leu235Ala, and Gly237Ala (positions according to the EU numbering system) .
[0016] In certain embodiments, the light chain of the antibody or the antigen-binding fragment thereof comprises a light chain constant region from or derived from the human immunoglobulin (for example, κ or λ) .
[0017] In certain embodiments, the antibody or the antigen-binding fragment thereof comprises a heavy chain constant region (CH) comprising the amino acid sequence set forth in SEQ ID NO: 121 or a variant thereof, and the variant has a conservative substitution of at most 20 amino acids (for example, a conservative substitution of at most 15, at most 10, or at most 5 amino acids; for example, a conservative substitution of 1, 2, 3, 4, or 5 amino acids) compared to SEQ ID NO: 121. In certain embodiments, the antibody or the antigen-binding fragment thereof comprises a light chain constant region (CL) comprising the amino acid sequence set forth in SEQ ID NO: 123 or 144 or a variant thereof, and the variant has a conservative substitution of at most 20 amino acids (for example, a conservative substitution of at most 15, at most 10, or at most 5 amino acids; for example, a conservative substitution of 1, 2, 3, 4, or 5 amino acids) compared to SEQ ID NO: 123 or 144.
[0018] In certain embodiments, the antibody or the antigen-binding fragment thereof comprises a variant of a human IgG1 heavy chain constant region comprising the amino acid sequence set forth in SEQ ID NO: 122. In certain embodiments, the antibody or the antigen-binding fragment thereof comprises a CH comprising the amino acid sequence set forth in SEQ ID NO: 121 or 122 and a CL comprising an amino acid sequence set forth in SEQ ID NO: 123 or 144.
[0019] In certain embodiments, the CH comprises the amino acid sequence set forth in SEQ ID NO: 121 or 122, or the variant thereof lacking a C-terminal lysine.
[0020] In certain embodiments, the antibody or the antigen-binding fragment thereof comprises: (1) a heavy chain comprising a VH comprising the amino acid sequence set forth in SEQ ID NO: 3 and a CH comprising the amino acid sequence set forth in SEQ ID NO: 122, and a light chain comprising a VL comprising the amino acid sequence set forth in SEQ ID NO: 4 and a CL comprising the amino acid sequence set forth in SEQ ID NO: 123; (2) a heavy chain comprising a VH comprising the amino acid sequence set forth in SEQ ID NO: 3 and a CH comprising the amino acid sequence set forth in SEQ ID NO: 121, and a light chain comprising a VL comprising the amino acid sequence set forth in SEQ ID NO: 4 and a CL comprising the amino acid sequence set forth in SEQ ID NO: 123; (3) a heavy chain comprising a VH comprising the amino acid sequence set forth in SEQ ID NO: 1 and a CH comprising the amino acid sequence set forth in SEQ ID NO: 121, and a light chain comprising a VL comprising the amino acid sequence set forth in SEQ ID NO: 2 and a CL comprising the amino acid sequence set forth in SEQ ID NO: 123; (4) a heavy chain comprising a VH comprising the amino acid sequence set forth in SEQ ID NO: 7 and a CH comprising the amino acid sequence set forth in SEQ ID NO: 121, and a light chain comprising a VL comprising the amino acid sequence set forth in SEQ ID NO: 8 and a CL comprising the amino acid sequence set forth in SEQ ID NO: 144; (5) a heavy chain comprising a VH comprising the amino acid sequence set forth in SEQ ID NO: 5 and a CH comprising the amino acid sequence set forth in SEQ ID NO: 121, and a light chain comprising a VL set forth in SEQ ID NO: 6 and a CL comprising the amino acid sequence set forth in SEQ ID NO: 144; (6) a heavy chain comprising a VH comprising the amino acid sequence set forth in SEQ ID NO: 11 and a CH comprising the amino acid sequence set forth in SEQ ID NO: 121, and a light chain comprising a VL comprising the amino acid sequence set forth in SEQ ID NO: 12 and a CL comprising the amino acid sequence set forth in SEQ ID NO: 123; (7) a heavy chain comprising a VH comprising the amino acid sequence set forth in SEQ ID NO: 9 and a CH comprising the amino acid sequence set forth in SEQ ID NO: 121, and a light chain comprising a VL comprising the amino acid sequence set forth in SEQ ID NO: 10 and a CL)comprising the amino acid sequence set forth in SEQ ID NO: 123; (8) a heavy chain comprising a VH comprising the amino acid sequence set forth in SEQ ID NO: 15 and a CH comprising the amino acid sequence set forth in SEQ ID NO: 121, and a light chain comprising a VL comprising the amino acid sequence set forth in SEQ ID NO: 16 and a CL comprising the amino acid sequence set forth in SEQ ID NO: 123; or (9) a heavy chain comprising a VH comprising the amino acid sequence set forth in SEQ ID NO: 13 and a CH comprising the amino acid sequence set forth in SEQ ID NO: 121, and a light chain comprising a VL comprising the amino acid sequence set forth in SEQ ID NO: 14 and CL comprising the amino acid sequence set forth in SEQ ID NO: 123.
[0021] In certain embodiments, the N-terminal glutamine of the VH comprising the amino acid sequence set forth in any one of SEQ ID NOs: 3, 1, 7, 5, 11, 9, 15 and 13 or a variant thereof is subjected to cyclization to form pyroglutamic acid or pyroglutamate.
[0022] In certain embodiments, the antibody or the antigen-binding fragment thereof comprises: (1) a heavy chain comprising the amino acid sequence set forth in SEQ ID NO: 126, and a light chain comprising the amino acid sequence set forth in SEQ ID NO: 125; (2) a heavy chain comprising the amino acid sequence set forth in SEQ ID NO: 124, and a light chain comprising the amino acid sequence set forth in SEQ ID NO: 125; (3) a heavy chain comprising the amino acid sequence set forth in SEQ ID NO: 127, and a light chain comprising the amino acid sequence set forth in SEQ ID NO: 128; (4) a heavy chain comprising the amino acid sequence set forth in SEQ ID NO: 129, and a light chain comprising the amino acid sequence set forth in SEQ ID NO: 130; (5) a heavy chain comprising the amino acid sequence set forth in SEQ ID NO: 131, and a light chain comprising the amino acid sequence set forth in SEQ ID NO: 132; (6) a heavy chain comprising the amino acid sequence set forth in SEQ ID NO: 133, and a light chain comprising the amino acid sequence set forth in SEQ ID NO: 134; (7) a heavy chain comprising the amino acid sequence set forth in SEQ ID NO: 135, and a light chain comprising the amino acid sequence set forth in SEQ ID NO: 136; (8) a heavy chain comprising the amino acid sequence set forth in SEQ ID NO: 137, and a light chain comprising the amino acid sequence set forth in SEQ ID NO: 138; or (9) a heavy chain comprising the amino acid sequence set forth in SEQ ID NO: 139, and a light chain comprising the amino acid sequence set forth in SEQ ID NO: 140.
[0023] In certain embodiments, the N-terminal glutamine of the heavy chain comprising the amino acid sequence set forth in any one of SEQ ID NOs: 126, 124, 127, 129, 131, 133, 135, 137, and 139 is subjected to cyclization to form pyroglutamic acid or pyroglutamate; and / or the heavy chain comprising the amino acid sequence set forth in any one of SEQ ID NOs: 126, 124, 127, 129, 131, 133, 135, 137, and 139 lacks a C-terminal lysine.
[0024] In certain embodiments, the antibody or the antigen-binding fragment thereof comprises: a heavy chain comprising the amino acid sequence set forth in SEQ ID NO: 141, and a light chain comprising the amino acid sequence set forth in SEQ ID NO: 125; a heavy chain comprising the amino acid sequence set forth in SEQ ID NO: 142, and a light chain comprising the amino acid sequence set forth in SEQ ID NO: 125; or a heavy chain comprising the amino acid sequence set forth in SEQ ID NO: 143, and a light chain comprising the amino acid sequence set forth in SEQ ID NO: 125.
[0025] In certain embodiments, the antibody or the antigen-binding fragment thereof is selected from an ScFv, a Fab, a Fab', a Fab'-SH, a F (ab') 2 and a Fv fragment, a disulfide-linked Fv (dsFv) , a diabody, a bispecific antibody, and a multispecific antibody.
[0026] In certain embodiments, the antibody or the antigen-binding fragment thereof is conjugated to a label. In certain embodiments, the antibody or the antigen-binding fragment thereof is conjugated to a detectable label. In certain embodiments, the detectable label is selected from an enzyme (for example, horseradish peroxidase) , a radionuclide, a fluorescent dye, a luminescent substance (such as a chemiluminescent substance) , and biotin.
[0027] In certain embodiments, the antibody or the antigen-binding fragment thereof has one or more features selected from the following: (1) specifically binding to human or monkey CDH3, for example, as determined by ELISA or flow cytometry; (2) not binding or substantially not binding to CDH1 and CDH2, for example, as determined by flow cytometry; (3) having a reduced or eliminated ADCC activity and / or ADCP activity; (4) having a reduced CDC activity; (5) inducing CDH3 internalization, for example, as determined by flow cytometry; (6) inhibiting proliferation of a cell (such as a tumor cell) ; and / or (7) inhibiting tumor growth.
[0028] Also provided herein is an isolated nucleic acid molecule, comprising a nucleotide sequence encoding the antibody or the antigen-binding fragment thereof of the present disclosure.
[0029] Also provided herein is a vector comprising the nucleic acid molecule of the present disclosure. In certain embodiments, the vector is a cloning vector or an expression vector.
[0030] Also provided herein is a host cell, comprising the nucleic acid molecule or the vector of the present disclosure.
[0031] Also provided herein is a method of preparing the antibody or the antigen-binding fragment thereof of the present disclosure, comprising culturing the host cell of the present disclosure under the condition of allowing the expression of the antibody or the antigen-binding fragment thereof; and recovering the antibody or the antigen-binding fragment thereof from the cultured host cell culture.
[0032] In certain embodiments, the host cell is a Chinese hamster ovary cell.
[0033] Also provided herein is an antibody or an antigen-binding fragment thereof obtainable by the method of the present disclosure.
[0034] Also provided herein is a conjugate comprising the antibody or the antigen-binding fragment thereof of the disclosure and a conjugation moiety linked thereto. In certain embodiments, the conjugation moiety is selected from a detectable label (such as a radioisotope, a fluorescent substance, a luminescent substance, a colored substance, or an enzyme) and a therapeutic agent (such as a cytotoxic agent, a cytokine, a toxin, or a radionuclide) .
[0035] Also provided herein a multispecific antibody comprising the antibody or the antigen-binding fragment thereof of the present disclosure. In certain embodiments, the multispecific antibody comprises the antibody or the antigen-binding fragment thereof of the present disclosure as a first antigen-binding domain, and further comprises at least one second antigen-binding domain for other targets. In certain embodiments, the multispecific antibody is a bispecific antibody or a trispecific antibody or a tetraspecific antibody.
[0036] Also provided herein is a chimeric antigen receptor, comprising the antibody or the antigen-binding fragment thereof of the present disclosure (for example, ScFv) , a transmembrane domain, and one or more intracellular T cell signaling domains.
[0037] Also provided herein is a pharmaceutical composition comprising the antibody or the antigen-binding fragment thereof of the present disclosure, the isolated nucleic acid molecule of the present disclosure, the vector of the present disclosure, the host cell of the present disclosure, the antibody or the antigen-binding fragment thereof obtainable by the method of the present disclosure, the conjugate of the present disclosure, the multispecific antibody of the present disclosure, the chimeric antigen receptor of the present disclosure or a host cell expressing the chimeric antigen receptor, and a pharmaceutically acceptable carrier and / or excipient. In certain embodiments, the pharmaceutical composition further comprises an additional pharmaceutically active agent. In certain embodiments, the additional pharmaceutically active agent is a drug with anti-tumor activity. In certain embodiments, the additional pharmaceutically active agent is selected from: CDH3 inhibitors, TROP2 inhibitors, B7H3 inhibitors, PTK7 inhibitors, PD-1 inhibitors, PD-L1 inhibitors, EGFR inhibitors, HER2 inhibitors, HER3 inhibitors, HER4 inhibitors, IGFR-1 inhibitors, mTOR inhibitors, PI3 kinase inhibitors, c-met or VEGF inhibitors, and chemotherapeutic drugs, or any combination thereof. In certain embodiments, the antibody or the antigen-binding fragment thereof and the additional pharmaceutically active agent are provided as separate components or as mixed components.
[0038] Also provided herein is a diagnostic or therapeutic kit comprising the antibody or the antigen-binding fragment thereof of the present disclosure, the isolated nucleic acid molecule of the present disclosure, the vector of the present disclosure, the host cell of the present disclosure, the antibody or the antigen-binding fragment thereof obtainable by the method of the present disclosure, the conjugate of the present disclosure, the multispecific antibody of the present disclosure, the chimeric antigen receptor of the present disclosure or a host cell expressing the chimeric antigen receptor, or the pharmaceutical composition of the present disclosure, and optionally instructions for use and / or a drug delivery device.
[0039] Also provided herein is a use of the antibody or the antigen-binding fragment thereof of the present disclosure, the isolated nucleic acid molecule of the present disclosure, the vector of the present disclosure, the host cell of the present disclosure, the antibody or the antigen-binding fragment thereof obtainable by the method of the present disclosure, the conjugate of the present disclosure, the multispecific antibody of the present disclosure, the chimeric antigen receptor of the present disclosure or a host cell expressing the chimeric antigen receptor, or the pharmaceutical composition of the present disclosure in the preparation of a medicament for the treatment and / or adjuvant treatment of a tumor. In certain embodiments, the antibody or the antigen-binding fragment thereof, the isolated nucleic acid molecule, the vector, the host cell, the conjugate, the multispecific antibody or the pharmaceutical composition is administered in combination with the additional pharmaceutically active agent, for example, simultaneously, separately, or sequentially. In certain embodiments, the additional pharmaceutically active agent is a drug with anti-tumor activity. In certain embodiments, the additional pharmaceutically active agent is selected from: CDH3 inhibitors, TROP2 inhibitors, B7H3 inhibitors, PTK7 inhibitors, PD-1 inhibitors, PD-L1 inhibitors, EGFR inhibitors, HER2 inhibitors, HER3 inhibitors, HER4 inhibitors, IGFR-1 inhibitors, mTOR inhibitors, PI3 kinase inhibitors, c-met or VEGF inhibitors, and chemotherapeutic drugs, or any combination thereof.
[0040] In certain embodiments, the tumor is a CDH3-positive tumor. In certain embodiments, the tumor is selected from colorectal cancer, gastric cancer, lung cancer, cervical cancer, pancreatic cancer, esophageal cancer, ovarian cancer, thyroid cancer, bladder cancer, endometrial cancer, breast cancer, liver cancer, prostate cancer, skin cancer, and bile duct cancer.
[0041] Also provided herein is a method of inhibiting proliferation of a cell comprising contacting the cell with the antibody or the antigen-binding fragment thereof of the present disclosure the present disclosure, the isolated nucleic acid molecule of the present disclosure, the vector of the present disclosure, the host cell of the present disclosure, the antibody or the antigen-binding fragment thereof obtainable by the method of the present disclosure, the conjugate of the present disclosure, the multispecific antibody of the present disclosure, the chimeric antigen receptor of the present disclosure or a host cell expressing the chimeric antigen receptor, or the pharmaceutical composition of the present disclosure. In certain embodiments, the cell is a cell expressing CDH3, for example, a tumor cell. In certain embodiments, the tumor cell overexpresses CDH3.
[0042] Also provided herein is a method for the treatment and / or adjuvant treatment of a tumor in a subject, comprising administering to a subject in need thereof an effective amount of the antibody or the antigen-binding fragment thereof of the present disclosure, the isolated nucleic acid molecule of the present disclosure, or the vector of the present disclosure, the host cell of the present disclosure, the antibody or the antigen-binding fragment thereof obtainable by the method of the present disclosure, the conjugate of the present disclosure, the multispecific antibody of the present disclosure, the chimeric antigen receptor of the present disclosure or a host cell expressing the chimeric antigen receptor, or the pharmaceutical composition of the present disclosure. In certain embodiments, the method further comprises administering to the subject a second therapy, wherein the second therapy is selected from surgery, chemotherapy, radiotherapy, immunotherapy, gene therapy, DNA therapy, RNA therapy, nanotherapy, viral therapy, and adjuvant therapy, or any combination thereof. In certain embodiments, the second therapy may be applied with the method simultaneously, separately, or sequentially.
[0043] In certain embodiments, the tumor is a CDH3-positive tumor. In certain embodiments, the tumor is selected from colorectal cancer, gastric cancer, lung cancer, cervical cancer, pancreatic cancer, esophageal cancer, ovarian cancer, thyroid cancer, bladder cancer, endometrial cancer, breast cancer, liver cancer, prostate cancer, skin cancer, and bile duct cancer.
[0044] Also provided herein is a method of detecting the presence or level of CDH3 in a sample, comprising contacting the sample with the antibody or the antigen-binding fragment thereof of the present disclosure under the condition of allowing formation of a complex between the antibody or the antigen-binding fragment thereof and CDH3; and detecting the formation of the complex. In certain embodiments, the method is used for diagnosing a tumor, for example, a CDH3-positive tumor, for example, colorectal cancer, gastric cancer, lung cancer, cervical cancer, pancreatic cancer, esophageal cancer, ovarian cancer, thyroid cancer, bladder cancer, endometrial cancer, breast cancer, liver cancer, prostate cancer, skin cancer, and bile duct cancer, or any combination thereof. In certain embodiments, the method comprises detecting an expression level of CDH3 in the sample to be tested from a subject, and comparing the expression level with a reference value, wherein an increase in the expression level compared to the reference value is an indication of a tumor.
[0045] Also provided is a use of the antibody or the antigen-binding fragment thereof of the present disclosure, or the isolated nucleic acid molecule of the present disclosure, the vector of the present disclosure, the host cell of the present disclosure, the antibody or the antigen-binding fragment thereof obtainable by the method of the present disclosure, the conjugate of the present disclosure, the multispecific antibody of the present disclosure in the preparation of a detection kit, wherein the kit is used for detecting the presence or level of CDH3 in a sample and / or diagnosing a tumor. In certain embodiments, the tumor is a CDH3-positive tumor. In certain embodiments, the tumor is selected from colorectal cancer, gastric cancer, lung cancer, cervical cancer, pancreatic cancer, esophageal cancer, ovarian cancer, thyroid cancer, bladder cancer, endometrial cancer, breast cancer, liver cancer, prostate cancer, skin cancer, and bile duct cancer, or any combination thereof.BRIEF DESCRIPTION OF THE DRAWINGS
[0046] FIGS. 1A-1B: Detection of the binding of mouse monoclonal antibodies to BaF3-hCDH3 cells.
[0047] FIG. 2A: Detection of the binding of chimeric antibodies to NCI-H358 cells.
[0048] FIG. 2B: Detection of the binding of chimeric antibodies to HCC1954 cells.
[0049] FIG. 3: Detection of the endocytosis of chimeric antibodies to NCI-H358 cells.
[0050] FIG. 4: Hum-ZAP detection of killing effect on HCC1954 cells by chimeric antibodies.
[0051] FIG. 5: Flow cytometry detection of the binding of anti-human CDH3 humanized antibodies to NCI-H358 cells.
[0052] FIG. 6: Flow cytometry detection of the binding of anti-human CDH3 humanized antibodies to HCC1954 cells.
[0053] FIG. 7: Flow cytometry detection of the binding of anti-human CDH3 humanized antibodies to BxPC-3 cells.
[0054] FIGs. 8A-8B: Humanized antibody binding epitope detection.
[0055] FIG. 9: Detection of the endocytosis of humanized antibodies to NCI-H358 cells.
[0056] FIG. 10: Detection of the endocytosis of humanized antibodies to HCC1806 cells.
[0057] FIG. 11: Detection of the endocytosis of humanized antibodies to A431 cells.
[0058] FIG. 12: Detection of the endocytosis of humanized antibodies to HCC827 cells.DETAILED DESCRIPTION
[0059] The present disclosure relates to CDH3-targeted murine antibodies and humanized antibodies with excellent properties. Such antibodies, which can specifically recognize / bind to human CDH3 with a high affinity and be efficiently endocytosed to enter the cells expressing CDH3, have a good stability and can be used in corresponding treatment and diagnosis fields. Antibodies
[0060] In one aspect, the disclosure provides an antibody or an antigen-binding fragment thereof specifically binding to CDH3, wherein the antibody or the antigen-binding fragment thereof comprises complementarity determining regions (CDRs) as follows: (a) CDR-H1, CDR-H2 and CDR-H3 amino acid sequences of a VH amino acid sequence set forth in SEQ ID NO: 3 or 1; and / or CDR-L1, CDR-L2 and CDR-L3 amino acid sequences of a VL amino acid sequence set forth in SEQ ID NO: 4 or 2; (b) CDR-H1, CDR-H2 and CDR-H3 amino acid sequences of a VH amino acid sequence set forth in SEQ ID NO: 7 or 5; and / or CDR-L1, CDR-L2 and CDR-L3 amino acid sequences of a VL amino acid sequence set forth in SEQ ID NO: 8 or 6; (c) CDR-H1, CDR-H2 and CDR-H3 amino acid sequences of a VH amino acid sequence set forth in SEQ ID NO: 11 or 9; and / or CDR-L1, CDR-L2 and CDR-L3 amino acid sequences of a VL amino acid sequence set forth in SEQ ID NO: 12 or 10; (d) CDR-H1, CDR-H2 and CDR-H3 amino acid sequences of a VH amino acid sequence set forth in SEQ ID NO: 15 or 13; and / or CDR-L1, CDR-L2 and CDR-L3 amino acid sequences of a VL amino acid sequence set forth in SEQ ID NO: 14 or 12; or (e) CDR-H1, CDR-H2 and CDR-H3 amino acid sequences of the following VH and / or CDR- L1, CDR-L2 and CDR-L3 amino acid sequences of the following VL, wherein at least one CDR of the VH and / or the VL comprises a mutation compared to the VH and / or the VL of any one of (a) - (d) , and the mutation is a substitution, deletion or addition of one or several amino acids (for example, a substitution, deletion or addition of 1, 2, or 3 amino acids) ; in particular embodiments, the substitution is a conservative substitution.
[0061] In certain embodiments, the antibody or the antigen-binding fragment thereof comprises the following CDRs: (i) CDR-H1, CDR-H2 and CDR-H3 amino acid sequences of a VH set forth in SEQ ID NO: 3; and CDR-L1, CDR-L2 and CDR-L3 amino acid sequences of a VL set forth in SEQ ID NO: 4; (ii) CDR-H1, CDR-H2 and CDR-H3 amino acid sequences of a VH set forth in SEQ ID NO: 1; and CDR-L1, CDR-L2 and CDR-L3 amino acid sequences of a VL set forth in SEQ ID NO: 2; (iii) CDR-H1, CDR-H2 and CDR-H3 amino acid sequences of a VH set forth in SEQ ID NO: 7; and CDR-L1, CDR-L2 and CDR-L3 amino acid sequences of a VL set forth in SEQ ID NO: 8; (iv) CDR-H1, CDR-H2 and CDR-H3 amino acid sequences of a VH set forth in SEQ ID NO: 5; and CDR-L1, CDR-L2 and CDR-L3 amino acid sequences of a VL set forth in SEQ ID NO: 6; (v) CDR-H1, CDR-H2 and CDR-H3 amino acid sequences of a VH set forth in SEQ ID NO: 11; and CDR-L1, CDR-L2 and CDR-L3 amino acid sequences of a VL set forth in SEQ ID NO: 12; (vi) CDR-H1, CDR-H2 and CDR-H3 amino acid sequences of a VH set forth in SEQ ID NO: 9; and CDR-L1, CDR-L2 and CDR-L3 amino acid sequences of a VL set forth in SEQ ID NO: 10; (vii) CDR-H1, CDR-H2 and CDR-H3 amino acid sequences of a VH set forth in SEQ ID NO: 15; and CDR-L1, CDR-L2 and CDR-L3 amino acid sequences of a VL set forth in SEQ ID NO: 16; (viii) CDR-H1, CDR-H2 and CDR-H3 amino acid sequences of a VH set forth in SEQ ID NO: 13; and CDR-L1, CDR-L2 and CDR-L3 amino acid sequences of a VL set forth in SEQ ID NO: 14; or (ix) CDR-H1, CDR-H2 and CDR-H3 amino acid sequences of the following VH, and / or CDR-L1, CDR-L2 and CDR-L3 amino acid sequences of the following VL, wherein at least one CDR of the VH and / or the VL comprises a mutation compared to the VH and / or the VL of any one of (i) to (viii) , and the mutation is a substitution, deletion or addition of one or several amino acids (for example, a substitution, deletion or addition of 1, 2 or 3 amino acids) ; and which in particular embodiments, the substitution is a conservative substitution.
[0062] In certain embodiments, the substitution is a conservative substitution.
[0063] In certain embodiments, the CDRs are defined according to the IMGT, Kabat, Chothia, Contact, or AbM numbering system.
[0064] In certain embodiments, the antibody or the antigen-binding fragment thereof specifically binding to CDH3 comprises complementarity determining regions (CDRs) as follows: (a) CDR-H1, CDR-H2 and CDR-H3 amino acid sequences of a VH set forth in SEQ ID NO: 3; and CDR-L1, CDR-L2 and CDR-L3 amino acid sequences of a VL set forth in SEQ ID NO: 4; (b) CDR-H1, CDR-H2 and CDR-H3 amino acid sequences of a VH set forth in SEQ ID NO: 1; and CDR-L1, CDR-L2 and CDR-L3 amino acid sequences of a VL set forth in SEQ ID NO: 2; (c) CDR-H1, CDR-H2 and CDR-H3 amino acid sequences of a VH set forth in SEQ ID NO: 7; and CDR-L1, CDR-L2 and CDR-L3 amino acid sequences of a VL set forth in SEQ ID NO: 8; (d) CDR-H1, CDR-H2 and CDR-H3 amino acid sequences of a VH set forth in SEQ ID NO: 5; and CDR-L1, CDR-L2 and CDR-L3 amino acid sequences of a VL set forth in SEQ ID NO: 6; (e) CDR-H1, CDR-H2 and CDR-H3 amino acid sequences of a VH set forth in SEQ ID NO: 11; and CDR-L1, CDR-L2 and CDR-L3 amino acid sequences of a VL set forth in SEQ ID NO: 12; (f) CDR-H1, CDR-H2 and CDR-H3 amino acid sequences of a VH set forth in SEQ ID NO: 9; and CDR-L1, CDR-L2 and CDR-L3 amino acid sequences of a VL set forth in SEQ ID NO: 10; (g) CDR-H1, CDR-H2 and CDR-H3 amino acid sequences of a VH set forth in SEQ ID NO: 15; and CDR-L1, CDR-L2 and CDR-L3 amino acid sequences of a VL set forth in SEQ ID NO: 16; or (h) CDR-H1, CDR-H2 and CDR-H3 amino acid sequences of a VH set forth in SEQ ID NO: 13; and CDR-L1, CDR-L2 and CDR-L3 amino acid sequences of a VL set forth in SEQ ID NO: 14.
[0065] In certain embodiments, the CDH3 comprises human CDH3 and / or monkey CDH3. In certain embodiments, the monkey is macaca fascicularis.
[0066] In certain embodiments, the antibody or the antigen-binding fragment thereof of the disclosure comprises a VH and / or a VL, wherein the CDRs are defined according to the Chothia numbering system: (1a) a VH comprising 3 CDRs as follows: CDR-H1 comprising the amino acid sequence of SEQ ID NO: 17 or a variant thereof; CDR-H2 comprising the amino acid sequence of SEQ ID NO: 27 or a variant thereof; and CDR-H3 comprising the amino acid sequence of SEQ ID NO: 32 or a variant thereof; and / or a VL comprising 3 CDRs as follows: CDR-L1 comprising the amino acid sequence of SEQ ID NO: 35 or a variant thereof; CDR-L2 comprising the amino acid sequence of SEQ ID NO: 38 or a variant thereof; and CDR-L3 comprising the amino acid sequence of SEQ ID NO: 42 or a variant thereof; (1b) a VH comprising 3 CDRs as follows: CDR-H1 comprising the amino acid sequence of SEQ ID NO: 17 or a variant thereof; CDR-H2 comprising the amino acid sequence of SEQ ID NO: 22 or a variant thereof; and CDR-H3 comprising the amino acid sequence of SEQ ID NO: 32 or a variant thereof; and / or a VL comprising 3 CDRs as follows: CDR-L1 comprising the amino acid sequence of SEQ ID NO: 35 or a variant thereof; CDR-L2 comprising the amino acid sequence of SEQ ID NO: 38 or a variant thereof; and CDR-L3 comprising the amino acid sequence of SEQ ID NO: 42 or a variant thereof; (1c) a VH comprising 3 CDRs as follows: CDR-H1 comprising the amino acid sequence of SEQ ID NO: 44 or a variant thereof; CDR-H2 comprising the amino acid sequence of SEQ ID NO: 49 or a variant thereof; and CDR-H3 comprising the amino acid sequence of SEQ ID NO: 55 or a variant thereof; and / or a VL comprising 3 CDRs as follows: CDR-L1 comprising the amino acid sequence of SEQ ID NO: 58 or a variant thereof; CDR-L2 comprising the amino acid sequence of SEQ ID NO: 63 or a variant thereof; and CDR-L3 comprising the amino acid sequence of SEQ ID NO: 66 or a variant thereof; (1d) a VH comprising 3 CDRs as follows: CDR-H1 comprising the amino acid sequence of SEQ ID NO: 44 or a variant thereof; CDR-H2 comprising the amino acid sequence of SEQ ID NO: 49 or a variant thereof; and CDR-H3 comprising the amino acid sequence of SEQ ID NO: 55 or a variant thereof; and / or a VL comprising 3 CDRs as follows: CDR-L1 comprising the amino acid sequence of SEQ ID NO: 58 or a variant thereof; CDR-L2 comprising the amino acid sequence of SEQ ID NO: 61 or a variant thereof; and CDR-L3 comprising the amino acid sequence of SEQ ID NO: 66 or a variant thereof; (1e) a VH comprising 3 CDRs as follows: CDR-H1 comprising the amino acid sequence of SEQ ID NO: 68 or a variant thereof; CDR-H2 comprising the amino acid sequence of SEQ ID NO: 73 or a variant thereof; and CDR-H3 comprising the amino acid sequence of SEQ ID NO: 80 or a variant thereof; and / or a VL comprising 3 CDRs as follows: CDR-L1 comprising the amino acid sequence of SEQ ID NO: 84 or a variant thereof; CDR-L2 comprising the amino acid sequence of SEQ ID NO: 88 or a variant thereof; and CDR-L3 comprising the amino acid sequence of SEQ ID NO: 91 or a variant thereof; (1f) a VH comprising 3 CDRs as follows: CDR-H1 comprising the amino acid sequence of SEQ ID NO: 68 or a variant thereof; CDR-H2 comprising the amino acid sequence of SEQ ID NO: 73 or a variant thereof; and CDR-H3 comprising the amino acid sequence of SEQ ID NO: 80 or a variant thereof; and / or a VL comprising 3 CDRs as follows: CDR-L1 comprising the amino acid sequence of SEQ ID NO: 83 or a variant thereof; CDR-L2 comprising the amino acid sequence of SEQ ID NO: 87 or a variant thereof; and CDR-L3 comprising the amino acid sequence of SEQ ID NO: 91 or a variant thereof; (1g) a VH comprising 3 CDRs as follows: CDR-H1 comprising the amino acid sequence of SEQ ID NO: 93 or a variant thereof; CDR-H2 comprising the amino acid sequence of SEQ ID NO: 103 or a variant thereof; and CDR-H3 comprising the amino acid sequence of SEQ ID NO: 108 or a variant thereof; and / or a VL comprising 3 CDRs as follows: CDR-L1 comprising the amino acid sequence of SEQ ID NO: 114 or a variant thereof; CDR-L2 comprising the amino acid sequence of SEQ ID NO: 117 or a variant thereof; and CDR-L3 comprising the amino acid sequence of SEQ ID NO: 119 or a variant thereof; or (1h) a VH comprising 3 CDRs as follows: CDR-H1 comprising the amino acid sequence of SEQ ID NO: 93 or a variant thereof; CDR-H2 comprising the amino acid sequence of SEQ ID NO: 98 or a variant thereof; and CDR-H3 comprising the amino acid sequence of SEQ ID NO: 108 or a variant thereof; and / or a VL comprising 3 CDRs as follows: CDR-L1 comprising the amino acid sequence of SEQ ID NO: 111 or a variant thereof; CDR-L2 comprising the amino acid sequence of SEQ ID NO: 117 or a variant thereof; and CDR-L3 comprising the amino acid sequence of SEQ ID NO: 119 or a variant thereof; wherein the variant in any one of (1a) , (1b) , (1c) , (1d) , (1e) , (1f) , (1g) and (1h) has a substitution, deletion or addition of one or several amino acids (for example, a substitution, deletion or addition of 1, 2 or 3 amino acids) compared to the sequence from which it is derived; and which in particular embodiments, the substitution is a conservative substitution.
[0067] In certain embodiments, the antibody or the antigen-binding fragment thereof of the disclosure comprises a VH and / or a VL, wherein the CDRs are defined according to the AbM numbering system: (2a) a VH comprising 3 CDRs as follows: CDR-H1 comprising the amino acid sequence of SEQ ID NO: 18 or a variant thereof; CDR-H2 comprising the amino acid sequence of SEQ ID NO: 28 or a variant thereof; and CDR-H3 comprising the amino acid sequence of SEQ ID NO: 32 or a variant thereof; and / or a VL comprising 3 CDRs as follows: CDR-L1 comprising the amino acid sequence of SEQ ID NO: 35 or a variant thereof; CDR-L2 comprising the amino acid sequence of SEQ ID NO: 38 or a variant thereof; and CDR-L3 comprising the amino acid sequence of SEQ ID NO: 42 or a variant thereof; (2b) a VH comprising 3 CDRs as follows: CDR-H1 comprising the amino acid sequence of SEQ ID NO: 18 or a variant thereof; CDR-H2 comprising the amino acid sequence of SEQ ID NO: 23 or a variant thereof; and CDR-H3 comprising the amino acid sequence of SEQ ID NO: 32 or a variant thereof; and / or a VL comprising 3 CDRs as follows: CDR-L1 comprising the amino acid sequence of SEQ ID NO: 35 or a variant thereof; CDR-L2 comprising the amino acid sequence of SEQ ID NO: 38 or a variant thereof; and CDR-L3 comprising the amino acid sequence of SEQ ID NO: 42 or a variant thereof; (2c) a VH comprising 3 CDRs as follows: CDR-H1 comprising the amino acid sequence of SEQ ID NO: 45 or a variant thereof; CDR-H2 comprising the amino acid sequence of SEQ ID NO: 50 or a variant thereof; and CDR-H3 comprising the amino acid sequence of SEQ ID NO: 55 or a variant thereof; and / or a VL comprising 3 CDRs as follows: CDR-L1 comprising the amino acid sequence of SEQ ID NO: 58 or a variant thereof; CDR-L2 comprising the amino acid sequence of SEQ ID NO: 63 or a variant thereof; and CDR-L3 comprising the amino acid sequence of SEQ ID NO: 66 or a variant thereof; (2d) a VH comprising 3 CDRs as follows: CDR-H1 comprising the amino acid sequence of SEQ ID NO: 45 or a variant thereof; CDR-H2 comprising the amino acid sequence of SEQ ID NO: 50 or a variant thereof; and CDR-H3 comprising the amino acid sequence of SEQ ID NO: 55 or a variant thereof; and / or a VL comprising 3 CDRs as follows: CDR-L1 comprising the amino acid sequence of SEQ ID NO: 58 or a variant thereof; CDR-L2 comprising the amino acid sequence of SEQ ID NO: 61 or a variant thereof; and CDR-L3 comprising the amino acid sequence of SEQ ID NO: 66 or a variant thereof; (2e) a VH comprising 3 CDRs as follows: CDR-H1 comprising the amino acid sequence of SEQ ID NO: 69 or a variant thereof; CDR-H2 comprising the amino acid sequence of SEQ ID NO: 74 or a variant thereof; and CDR-H3 comprising the amino acid sequence of SEQ ID NO: 80 or a variant thereof; and / or a VL comprising 3 CDRs as follows: CDR-L1 comprising the amino acid sequence of SEQ ID NO: 84 or a variant thereof; CDR-L2 comprising the amino acid sequence of SEQ ID NO: 88 or a variant thereof; and CDR-L3 comprising the amino acid sequence of SEQ ID NO: 91 or a variant thereof; (2f) a VH comprising 3 CDRs as follows: CDR-H1 comprising the amino acid sequence of SEQ ID NO: 69 or a variant thereof; CDR-H2 comprising the amino acid sequence of SEQ ID NO: 74 or a variant thereof; and CDR-H3 comprising the amino acid a sequence of SEQ ID NO: 80 or a variant thereof; and / or a VL comprising 3 CDRs as follows: CDR-L1 comprising the amino acid a sequence of SEQ ID NO: 83 or a variant thereof; CDR-L2 comprising the amino acid sequence of SEQ ID NO: 87 or a variant thereof; and CDR-L3 comprising the amino acid sequence of SEQ ID NO: 91 or a variant thereof; (2g) a VH comprising 3 CDRs as follows: CDR-H1 comprising the amino acid sequence of SEQ ID NO: 94 or a variant thereof; CDR-H2 comprising the amino acid sequence of SEQ ID NO: 104 or a variant thereof; and CDR-H3 comprising the amino acid sequence of SEQ ID NO: 108 or a variant thereof; and / or a VL comprising 3 CDRs as follows: CDR-L1 comprising the amino acid sequence of SEQ ID NO: 114 or a variant thereof; CDR-L2 comprising the amino acid sequence of SEQ ID NO: 117 or a variant thereof; and CDR-L3 comprising the amino acid sequence of SEQ ID NO: 119 or a variant thereof; or (2h) a VH comprising 3 CDRs as follows: CDR-H1 comprising the amino acid sequence of SEQ ID NO: 94 or a variant thereof; CDR-H2 comprising the amino acid sequence of SEQ ID NO: 99 or a variant thereof; and CDR-H3 comprising the amino acid sequence of SEQ ID NO: 108 or a variant thereof; and / or a VL comprising 3 CDRs as follows: CDR-L1 comprising the amino acid sequence of SEQ ID NO: 111 or a variant thereof; CDR-L2 comprising the amino acid sequence of SEQ ID NO: 117 or a variant thereof; and CDR-L3 comprising the amino acid sequence of SEQ ID NO: 119 or a variant thereof; wherein the variant in any one of (2a) , (2b) , (2c) , (2d) , (2e) , (2f) , (2g) and (2h) has a substitution, deletion or addition of one or several amino acids (for example, a substitution, deletion or addition of 1, 2 or 3 amino acids) compared to the sequence from which it is derived; and which in particular embodiments, the substitution is a conservative substitution.
[0068] In certain embodiments, the antibody or the antigen-binding fragment thereof of the disclosure comprises a VH and / or a VL, wherein the CDRs are defined according to the Kabat numbering system: (3a) a VH comprising 3 CDRs as follows: CDR-H1 comprising the amino acid sequence of SEQ ID NO: 19 or a variant thereof; CDR-H2 comprising the amino acid sequence of SEQ ID NO: 29 or a variant thereof; and CDR-H3 comprising the amino acid sequence of SEQ ID NO: 32 or a variant thereof; and / or a VL comprising 3 CDRs as follows: CDR-L1 comprising the amino acid sequence of SEQ ID NO: 35 or a variant thereof; CDR-L2 comprising the amino acid sequence of SEQ ID NO: 38 or a variant thereof; and CDR-L3 comprising the amino acid sequence of SEQ ID NO: 42 or a variant thereof; (3b) a VH comprising 3 CDRs as follows: CDR-H1 comprising the amino acid sequence of SEQ ID NO: 19 or a variant thereof; CDR-H2 comprising the amino acid sequence of SEQ ID NO: 24 or a variant thereof; and CDR-H3 comprising the amino acid sequence of SEQ ID NO: 32 or a variant thereof; and / or a VL comprising 3 CDRs as follows: CDR-L1 comprising the amino acid sequence of SEQ ID NO: 35 or a variant thereof; CDR-L2 comprising the amino acid sequence of SEQ ID NO: 38 or a variant thereof; and CDR-L3 comprising the amino acid sequence of SEQ ID NO: 42 or a variant thereof; (3c) a VH comprising 3 CDRs as follows: CDR-H1 comprising the amino acid sequence of SEQ ID NO: 46 or a variant thereof; CDR-H2 comprising the amino acid sequence of SEQ ID NO: 52 or a variant thereof; and CDR-H3 comprising the amino acid sequence of SEQ ID NO: 55 or a variant thereof; and / or a VL comprising 3 CDRs as follows: CDR-L1 comprising the amino acid sequence of SEQ ID NO: 58 or a variant thereof; CDR-L2 comprising the amino acid sequence of SEQ ID NO: 63 or a variant thereof; and CDR-L3 comprising the amino acid sequence of SEQ ID NO: 66 or a variant thereof; (3d) a VH comprising 3 CDRs as follows: CDR-H1 comprising the amino acid sequence of SEQ ID NO: 46 or a variant thereof; CDR-H2 comprising the amino acid sequence of SEQ ID NO: 51 or a variant thereof; and CDR-H3 comprising the amino acid sequence of SEQ ID NO: 55 or a variant thereof; and / or a VL comprising 3 CDRs as follows: CDR-L1 comprising the amino acid sequence of SEQ ID NO: 58 or a variant thereof; CDR-L2 comprising the amino acid sequence of SEQ ID NO: 61 or a variant thereof; and CDR-L3 comprising the amino acid sequence of SEQ ID NO: 66 or a variant thereof; (3e) a VH comprising 3 CDRs as follows: CDR-H1 comprising the amino acid sequence of SEQ ID NO: 70 or a variant thereof; CDR-H2 comprising the amino acid sequence of SEQ ID NO: 77 or a variant thereof; and CDR-H3 comprising the amino acid sequence of SEQ ID NO: 80 or a variant thereof; and / or a VL comprising 3 CDRs as follows: CDR-L1 comprising the amino acid sequence of SEQ ID NO: 84 or a variant thereof; CDR-L2 comprising the amino acid sequence of SEQ ID NO: 88 or a variant thereof; and CDR-L3 comprising the amino acid sequence of SEQ ID NO: 91 or a variant thereof; (3f) a VH comprising 3 CDRs as follows: CDR-H1 comprising the amino acid sequence of SEQ ID NO: 70 or a variant thereof; CDR-H2 comprising the amino acid sequence of SEQ ID NO: 75 or a variant thereof; and CDR-H3 comprising the amino acid sequence of SEQ ID NO: 80 or a variant thereof; and / or a VL comprising 3 CDRs as follows: CDR-L1 comprising the amino acid sequence of SEQ ID NO: 83 or a variant thereof; CDR-L2 comprising the amino acid sequence of SEQ ID NO: 87 or a variant thereof; and CDR-L3 comprising the amino acid sequence of SEQ ID NO: 91 or a variant thereof; (3g) a VH comprising 3 CDRs as follows: CDR-H1 comprising the amino acid sequence of SEQ ID NO: 95 or a variant thereof; CDR-H2 comprising the amino acid sequence of SEQ ID NO: 105 or a variant thereof; and CDR-H3 comprising the amino acid sequence of SEQ ID NO: 108 or a variant thereof; and / or a VL comprising 3 CDRs as follows: CDR-L1 comprising the amino acid sequence of SEQ ID NO: 114 or a variant thereof; CDR-L2 comprising the amino acid sequence of SEQ ID NO: 117 or a variant thereof; and CDR-L3 comprising the amino acid sequence of SEQ ID NO: 119 or a variant thereof; or (3h) a VH comprising 3 CDRs as follows: CDR-H1 comprising the amino acid sequence of SEQ ID NO: 95 or a variant thereof; CDR-H2 comprising the amino acid sequence of SEQ ID NO: 100 or a variant thereof; and CDR-H3 comprising the amino acid sequence of SEQ ID NO: 108 or a variant thereof; and / or a VL comprising 3 CDRs as follows: CDR-L1 comprising the amino acid sequence of SEQ ID NO: 111 or a variant thereof; CDR-L2 comprising the amino acid sequence of SEQ ID NO: 117 or a variant thereof; and CDR-L3 comprising the amino acid sequence of SEQ ID NO: 119 or a variant thereof; wherein the variant in any one of (3a) , (3b) , (3c) , (3d) , (3e) , (3f) , (3g) and (3h) has a substitution, deletion or addition of one or several amino acids (for example, a substitution, deletion or addition of 1, 2 or 3 amino acids) compared to the sequence from which it is derived; and which particular embodiments, the substitution is a conservative substitution.
[0069] In certain embodiments, the antibody or the antigen-binding fragment thereof of the disclosure comprises a VH and / or a VL, wherein the CDRs are defined according to the Contact numbering system: (4a) a VH comprising 3 CDRs as follows: CDR-H1 comprising the amino acid sequence of SEQ ID NO: 20 or a variant thereof; CDR-H2 comprising the amino acid sequence of SEQ ID NO: 30 or a variant thereof; and CDR-H3 comprising the amino acid sequence of SEQ ID NO: 33 or a variant thereof; and / or a VL comprising 3 CDRs as follows: CDR-L1 comprising the amino acid sequence of SEQ ID NO: 36 or a variant thereof; CDR-L2 comprising the amino acid sequence of SEQ ID NO: 40 or a variant thereof; and CDR-L3 comprising the amino acid sequence of SEQ ID NO: 43 or a variant thereof; (4b) a VH comprising 3 CDRs as follows: CDR-H1 comprising the amino acid sequence of SEQ ID NO: 20 or a variant thereof; CDR-H2 comprising the amino acid sequence of SEQ ID NO: 25 or a variant thereof; and CDR-H3 comprising the amino acid sequence of SEQ ID NO: 33 or a variant thereof; and / or a VL comprising 3 CDRs as follows: CDR-L1 comprising the amino acid sequence of SEQ ID NO: 36 or a variant thereof; CDR-L2 comprising the amino acid sequence of SEQ ID NO: 39 or a variant thereof; and CDR-L3 comprising the amino acid sequence of SEQ ID NO: 43 or a variant thereof; (4c) a VH comprising 3 CDRs as follows: CDR-H1 comprising the amino acid sequence of SEQ ID NO: 47 or a variant thereof; CDR-H2 comprising the amino acid sequence of SEQ ID NO: 53 or a variant thereof; and CDR-H3 comprising the amino acid sequence of SEQ ID NO: 56 or a variant thereof; and / or a VL comprising 3 CDRs as follows: CDR-L1 comprising the amino acid sequence of SEQ ID NO: 59 or a variant thereof; CDR-L2 comprising the amino acid sequence of SEQ ID NO: 64 or a variant thereof; and CDR-L3 comprising the amino acid sequence of SEQ ID NO: 67 or a variant thereof; (4d) a VH comprising 3 CDRs as follows: CDR-H1 comprising the amino acid sequence of SEQ ID NO: 47 or a variant thereof; CDR-H2 comprising the amino acid sequence of SEQ ID NO: 53 or a variant thereof; and CDR-H3 comprising the amino acid sequence of SEQ ID NO: 56 or a variant thereof; and / or a VL comprising 3 CDRs as follows: CDR-L1 comprising the amino acid sequence of SEQ ID NO: 59 or a variant thereof; CDR-L2 comprising the amino acid sequence of SEQ ID NO: 62 or a variant thereof; and CDR-L3 comprising the amino acid sequence of SEQ ID NO: 67 or a variant thereof; (4e) a VH comprising 3 CDRs as follows: CDR-H1 comprising the amino acid sequence of SEQ ID NO: 71 or a variant thereof; CDR-H2 comprising the amino acid sequence of SEQ ID NO: 78 or a variant thereof; and CDR-H3 comprising the amino acid sequence of SEQ ID NO: 81 or a variant thereof; and / or a VL comprising 3 CDRs as follows: CDR-L1 comprising the amino acid sequence of SEQ ID NO: 85 or a variant thereof; CDR-L2 comprising the amino acid sequence of SEQ ID NO: 89 or a variant thereof; and CDR-L3 comprising the amino acid sequence of SEQ ID NO: 92 or a variant thereof; (4f) a VH comprising 3 CDRs as follows: CDR-H1 comprising the amino acid sequence of SEQ ID NO: 71 or a variant thereof; CDR-H2 comprising the amino acid sequence of SEQ ID NO: 76 or a variant thereof; and CDR-H3 comprising the amino acid sequence of SEQ ID NO: 81 or a variant thereof; and / or a VL comprising 3 CDRs as follows: CDR-L1 comprising the amino acid sequence of SEQ ID NO: 85 or a variant thereof; CDR-L2 comprising the amino acid sequence of SEQ ID NO: 89 or a variant thereof; and CDR-L3 comprising the amino acid sequence of SEQ ID NO: 92 or a variant thereof; (4g) a VH comprising 3 CDRs as follows: CDR-H1 comprising the amino acid sequence of SEQ ID NO: 96 or a variant thereof; CDR-H2 comprising the amino acid sequence of SEQ ID NO: 106 or a variant thereof; and CDR-H3 comprising the amino acid sequence of SEQ ID NO: 109 or a variant thereof; and / or a VL comprising 3 CDRs as follows: CDR-L1 comprising the amino acid sequence of SEQ ID NO: 115 or a variant thereof; CDR-L2 comprising the amino acid sequence of SEQ ID NO: 118 or a variant thereof; and CDR-L3 comprising the amino acid sequence of SEQ ID NO: 120 or a variant thereof; or (4h) a VH comprising 3 CDRs as follows: CDR-H1 comprising the amino acid sequence of SEQ ID NO: 96 or a variant thereof; CDR-H2 comprising the amino acid sequence of SEQ ID NO: 101 or a variant thereof; and CDR-H3 comprising the amino acid sequence of SEQ ID NO: 109 or a variant thereof; and / or a VL comprising 3 CDRs as follows: CDR-L1 comprising the amino acid sequence of SEQ ID NO: 112 or a variant thereof; CDR-L2 comprising the amino acid sequence of SEQ ID NO: 118 or a variant thereof; and CDR-L3 comprising the amino acid sequence of SEQ ID NO: 120 or a variant thereof; wherein the variant in any one of (4a) , (4b) , (4c) , (4d) , (4e) , (4f) , (4g) and (4h) has a substitution, deletion or addition of one or several amino acids (for example, a substitution, deletion or addition of 1, 2 or 3 amino acids) compared to the sequence from which it is derived; and which in particular embodiments, the substitution is a conservative substitution.
[0070] In certain embodiments, the antibody or the antigen-binding fragment thereof of the disclosure comprises a VH and / or a VL, wherein the CDRs are defined according to the IMGT numbering system: (5a) a VH comprising 3 CDRs as follows: CDR-H1 comprising the amino acid sequence of SEQ ID NO: 21 or a variant thereof; CDR-H2 comprising the amino acid sequence of SEQ ID NO: 31 or a variant thereof; and CDR-H3 comprising the amino acid sequence of SEQ ID NO: 34 or a variant thereof; and / or a VL comprising 3 CDRs as follows: CDR-L1 comprising the amino acid sequence of SEQ ID NO: 37 or a variant thereof; CDR-L2 comprising the amino acid sequence of SEQ ID NO: 41 or a variant thereof; and CDR-L3 comprising the amino acid sequence of SEQ ID NO: 42 or a variant thereof; (5b) a VH comprising 3 CDRs as follows: CDR-H1 comprising the amino acid sequence of SEQ ID NO: 21 or a variant thereof; CDR-H2 comprising the amino acid sequence of SEQ ID NO: 26 or a variant thereof; and CDR-H3 comprising the amino acid sequence of SEQ ID NO: 34 or a variant thereof; and / or a VL comprising 3 CDRs as follows: CDR-L1 comprising the amino acid sequence of SEQ ID NO: 37 or a variant thereof; CDR-L2 comprising the amino acid sequence of SEQ ID NO: 41 or a variant thereof; and CDR-L3 comprising the amino acid sequence of SEQ ID NO: 42 or a variant thereof; (5c) a VH comprising 3 CDRs as follows: CDR-H1 comprising the amino acid sequence of SEQ ID NO: 48 or a variant thereof; CDR-H2 comprising the amino acid sequence of SEQ ID NO: 54 or a variant thereof; and CDR-H3 comprising the amino acid sequence of SEQ ID NO: 57 or a variant thereof; and / or a VL comprising 3 CDRs as follows: CDR-L1 comprising the amino acid sequence of SEQ ID NO: 60 or a variant thereof; CDR-L2 comprising the amino acid sequence of SEQ ID NO: 65 or a variant thereof; and CDR-L3 comprising the amino acid sequence of SEQ ID NO: 66 or a variant thereof; (5d) a VH comprising 3 CDRs as follows: CDR-H1 comprising the amino acid sequence of SEQ ID NO: 72 or a variant thereof; CDR-H2 comprising the amino acid sequence of SEQ ID NO: 79 or a variant thereof; and CDR-H3 comprising the amino acid sequence of SEQ ID NO: 82 or a variant thereof; and / or a VL comprising 3 CDRs as follows: CDR-L1 comprising the amino acid sequence of SEQ ID NO: 86 or a variant thereof; CDR-L2 comprising the amino acid sequence of SEQ ID NO: 90 or a variant thereof; and CDR-L3 comprising the amino acid sequence of SEQ ID NO: 91 or a variant thereof; (5e) a VH comprising 3 CDRs as follows: CDR-H1 comprising the amino acid sequence of SEQ ID NO: 97 or a variant thereof; CDR-H2 comprising the amino acid sequence of SEQ ID NO: 107 or a variant thereof; and CDR-H3 comprising the amino acid sequence of SEQ ID NO: 110 or a variant thereof; and / or a VL comprising 3 CDRs as follows: CDR-L1 comprising the amino acid sequence of SEQ ID NO: 116 or a variant thereof; CDR-L2 comprising the amino acid sequence of SEQ ID NO: 41 or a variant thereof; and CDR-L3 comprising the amino acid sequence of SEQ ID NO: 119 or a variant thereof; or (5f) a VH comprising 3 CDRs as follows: CDR-H1 comprising the amino acid sequence of SEQ ID NO: 97 or a variant thereof; CDR-H2 comprising the amino acid sequence of SEQ ID NO: 102 or a variant thereof; and CDR-H3 comprising the amino acid sequence of SEQ ID NO: 110 or a variant thereof; and / or a VL comprising 3 CDRs as follows: CDR-L1 comprising the amino acid sequence of SEQ ID NO: 113 or a variant thereof; CDR-L2 comprising the amino acid sequence of SEQ ID NO: 41 or a variant thereof; and CDR-L3 comprising the amino acid sequence of SEQ ID NO: 119 or a variant thereof; wherein the variant in any one of (5a) , (5b) , (5c) , (5d) , (5e) and (5f) has a substitution, deletion or addition of one or several amino acids (for example, a substitution, deletion or addition of 1, 2 or 3 amino acids) compared to the sequence from which it is derived; and which in particular embodiments, the substitution is a conservative substitution.
[0071] In certain embodiments, the antibody or the antigen-binding fragment thereof comprises the following VH and / or VL, wherein the CDRs are defined according to the Chothia numbering system: (1a) a VH comprising 3 CDRs as follows: CDR-H1 comprising the amino acid sequence of SEQ ID NO: 17; CDR-H2 comprising the amino acid sequence of SEQ ID NO: 27; and CDR-H3 comprising the amino acid sequence of SEQ ID NO: 32; and / or a VL comprising 3 CDRs as follows: CDR-L1 comprising the amino acid sequence of SEQ ID NO: 35; CDR-L2 comprising the amino acid sequence of SEQ ID NO: 38; and CDR-L3 comprising the amino acid sequence of SEQ ID NO: 42; (1b) a VH comprising 3 CDRs as follows: CDR-H1 comprising the amino acid sequence of SEQ ID NO: 17; CDR-H2 comprising the amino acid sequence of SEQ ID NO: 22; and CDR-H3 comprising the amino acid sequence of SEQ ID NO: 32; and / or a VL comprising 3 CDRs as follows: CDR-L1 comprising the amino acid sequence of SEQ ID NO: 35; CDR-L2 comprising the amino acid sequence of SEQ ID NO: 38; and CDR-L3 comprising the amino acid sequence of SEQ ID NO: 42; (1c) a VH comprising 3 CDRs as follows: CDR-H1 comprising the amino acid sequence of SEQ ID NO: 44; CDR-H2 comprising the amino acid sequence of SEQ ID NO: 49; and CDR-H3 comprising the amino acid sequence of SEQ ID NO: 55; and / or a VL comprising 3 CDRs as follows: CDR-L1 comprising the amino acid sequence of SEQ ID NO: 58; CDR-L2 comprising the amino acid sequence of SEQ ID NO: 63; and CDR-L3 comprising the amino acid sequence of SEQ ID NO: 66; (1d) a VH comprising 3 CDRs as follows: CDR-H1 comprising the amino acid sequence of SEQ ID NO: 44; CDR-H2 comprising the amino acid sequence of SEQ ID NO: 49; and CDR-H3 comprising the amino acid sequence of SEQ ID NO: 55; and / or a VL comprising 3 CDRs as follows: CDR-L1 comprising the amino acid sequence of SEQ ID NO: 58; CDR-L2 comprising the amino acid sequence of SEQ ID NO: 61; and CDR-L3 comprising the amino acid sequence of SEQ ID NO: 66; (1e) a VH comprising 3 CDRs as follows: CDR-H1 comprising the amino acid sequence of SEQ ID NO: 68; CDR-H2 comprising the amino acid sequence of SEQ ID NO: 73; and CDR-H3 comprising the amino acid sequence of SEQ ID NO: 80; and / or a VL comprising 3 CDRs as follows: CDR-L1 comprising the amino acid sequence of SEQ ID NO: 84; CDR-L2 comprising the amino acid sequence of SEQ ID NO: 88; and CDR-L3 comprising the amino acid sequence of SEQ ID NO: 91; (1f) a VH comprising 3 CDRs as follows: CDR-H1 comprising the amino acid sequence of SEQ ID NO: 68; CDR-H2 comprising the amino acid sequence of SEQ ID NO: 73; and CDR-H3 comprising the amino acid sequence of SEQ ID NO: 80; and / or a VL comprising 3 CDRs as follows: CDR-L1 comprising the amino acid sequence of SEQ ID NO: 83; CDR-L2 comprising the amino acid sequence of SEQ ID NO: 87; and CDR-L3 comprising the amino acid sequence of SEQ ID NO: 91; (1g) a VH comprising 3 CDRs as follows: CDR-H1 comprising the amino acid sequence of SEQ ID NO: 93; CDR-H2 comprising the amino acid sequence of SEQ ID NO: 103; and CDR-H3 comprising the amino acid sequence of SEQ ID NO: 108; and / or a VL comprising 3 CDRs as follows: CDR-L1 comprising the amino acid sequence of SEQ ID NO: 114; CDR-L2 comprising the amino acid sequence of SEQ ID NO: 117; and CDR-L3 comprising the amino acid sequence of SEQ ID NO: 119; or (1h) a VH comprising 3 CDRs as follows: CDR-H1 comprising the amino acid sequence of SEQ ID NO: 93; CDR-H2 comprising the amino acid sequence of SEQ ID NO: 98; and CDR-H3 comprising the amino acid sequence of SEQ ID NO: 108; and / or a VL comprising 3 CDRs as follows: CDR-L1 comprising the amino acid sequence of SEQ ID NO: 111; CDR-L2 comprising the amino acid sequence of SEQ ID NO: 117; and CDR-L3 comprising the amino acid sequence of SEQ ID NO: 119.
[0072] In certain embodiments, the antibody or the antigen-binding fragment thereof comprises the following VH and / or VL, wherein the CDRs are defined according to the AbM numbering system: (2a) a VH comprising 3 CDRs as follows: CDR-H1 comprising the amino acid sequence of SEQ ID NO: 18; CDR-H2 comprising the amino acid sequence of SEQ ID NO: 28; and CDR-H3 comprising the amino acid sequence of SEQ ID NO: 32; and / or a VL comprising 3 CDRs as follows: CDR-L1 comprising the amino acid sequence of SEQ ID NO: 35; CDR-L2 comprising the amino acid sequence of SEQ ID NO: 38; and CDR-L3 comprising the amino acid sequence of SEQ ID NO: 42; (2b) a VH comprising 3 CDRs as follows: CDR-H1 comprising the amino acid sequence of SEQ ID NO: 18; CDR-H2 comprising the amino acid sequence of SEQ ID NO: 23; and CDR-H3 comprising the amino acid sequence of SEQ ID NO: 32; and / or a VL comprising 3 CDRs as follows: CDR-L1 comprising the amino acid sequence of SEQ ID NO: 35; CDR-L2 comprising the amino acid sequence of SEQ ID NO: 38; and CDR-L3 comprising the amino acid sequence of SEQ ID NO: 42; (2c) a VH comprising 3 CDRs as follows: CDR-H1 comprising the amino acid sequence of SEQ ID NO: 45; CDR-H2 comprising the amino acid sequence of SEQ ID NO: 50; and CDR-H3 comprising the amino acid sequence of SEQ ID NO: 55; and / or a VL comprising 3 CDRs as follows: CDR-L1 comprising the amino acid sequence of SEQ ID NO: 58; CDR-L2 comprising the amino acid sequence of SEQ ID NO: 63; and CDR-L3 comprising the amino acid sequence of SEQ ID NO: 66; (2d) a VH comprising 3 CDRs as follows: CDR-H1 comprising the amino acid sequence of SEQ ID NO: 45; CDR-H2 comprising the amino acid sequence of SEQ ID NO: 50; and CDR-H3 comprising the amino acid sequence of SEQ ID NO: 55; and / or a VL comprising 3 CDRs as follows: CDR-L1 comprising the amino acid sequence of SEQ ID NO: 58; CDR-L2 comprising the amino acid sequence of SEQ ID NO: 61; and CDR-L3 comprising the amino acid sequence of SEQ ID NO: 66; (2e) a VH comprising 3 CDRs as follows: CDR-H1 comprising the amino acid sequence of SEQ ID NO: 69; CDR-H2 comprising the amino acid sequence of SEQ ID NO: 74; and CDR-H3 comprising the amino acid sequence of SEQ ID NO: 80; and / or a VL comprising 3 CDRs as follows: CDR-L1 comprising the amino acid sequence of SEQ ID NO: 84; CDR-L2 comprising the amino acid sequence of SEQ ID NO: 88; and CDR-L3 comprising the amino acid sequence of SEQ ID NO: 91; (2f) a VH comprising 3 CDRs as follows: CDR-H1 comprising the amino acid sequence of SEQ ID NO: 69; CDR-H2 comprising the amino acid sequence of SEQ ID NO: 74; and CDR-H3 comprising the amino acid sequence of SEQ ID NO: 80; and / or a VL comprising 3 CDRs as follows: CDR-L1 comprising the amino acid sequence of SEQ ID NO: 83; CDR-L2 comprising the amino acid sequence of SEQ ID NO: 87; and CDR-L3 comprising the amino acid sequence of SEQ ID NO: 91; (2g) a VH comprising 3 CDRs as follows: CDR-H1 comprising the amino acid sequence of SEQ ID NO: 94; CDR-H2 comprising the amino acid sequence of SEQ ID NO: 104; and CDR-H3 comprising the amino acid sequence of SEQ ID NO: 108; and / or a VL comprising 3 CDRs as follows: CDR-L1 comprising the amino acid sequence of SEQ ID NO: 114; CDR-L2 comprising the amino acid sequence of SEQ ID NO: 117; and CDR-L3 comprising the amino acid sequence of SEQ ID NO: 119; or (2h) a VH comprising 3 CDRs as follows: CDR-H1 comprising the amino acid sequence of SEQ ID NO: 94; CDR-H2 comprising the amino acid sequence of SEQ ID NO: 99; and CDR-H3 comprising the amino acid sequence of SEQ ID NO: 108; and / or a VL comprising 3 CDRs as follows: CDR-L1 comprising the amino acid sequence of SEQ ID NO: 111; CDR-L2 comprising the amino acid sequence of SEQ ID NO: 117; and CDR-L3 comprising the amino acid sequence of SEQ ID NO: 119.
[0073] In certain embodiments, the antibody or the antigen-binding fragment thereof comprises the following VH and / or VL, wherein the CDRs are defined according to the Kabat numbering system: (3a) a VH comprising 3 CDRs as follows: CDR-H1 comprising the amino acid sequence of SEQ ID NO: 19; CDR-H2 comprising the amino acid sequence of SEQ ID NO: 29; and CDR-H3 comprising the amino acid sequence of SEQ ID NO: 32; and / or a VL comprising 3 CDRs as follows: CDR-L1 comprising the amino acid sequence of SEQ ID NO: 35; CDR-L2 comprising the amino acid sequence of SEQ ID NO: 38; and CDR-L3 comprising the amino acid sequence of SEQ ID NO: 42; (3b) a VH comprising 3 CDRs as follows: CDR-H1 comprising the amino acid sequence of SEQ ID NO: 19; CDR-H2 comprising the amino acid sequence of SEQ ID NO: 24; and CDR-H3 comprising the amino acid sequence of SEQ ID NO: 32; and / or a VL comprising 3 CDRs as follows: CDR-L1 comprising the amino acid sequence of SEQ ID NO: 35; CDR-L2 comprising the amino acid sequence of SEQ ID NO: 38; and CDR-L3 comprising the amino acid sequence of SEQ ID NO: 42; (3c) a VH comprising 3 CDRs as follows: CDR-H1 comprising the amino acid sequence of SEQ ID NO: 46; CDR-H2 comprising the amino acid sequence of SEQ ID NO: 52; and CDR-H3 comprising the amino acid sequence of SEQ ID NO: 55; and / or a VL comprising 3 CDRs as follows: CDR-L1 comprising the amino acid sequence of SEQ ID NO: 58; CDR-L2 comprising the amino acid sequence of SEQ ID NO: 63; and CDR-L3 comprising the amino acid sequence of SEQ ID NO: 66; (3d) a VH comprising 3 CDRs as follows: CDR-H1 comprising the amino acid sequence of SEQ ID NO: 46; CDR-H2 comprising the amino acid sequence of SEQ ID NO: 51; and CDR-H3 comprising the amino acid sequence of SEQ ID NO: 55; and / or a VL comprising 3 CDRs as follows: CDR-L1 comprising the amino acid sequence of SEQ ID NO: 58; CDR-L2 comprising the amino acid sequence of SEQ ID NO: 61; and CDR-L3 comprising the amino acid sequence of SEQ ID NO: 66; (3e) a VH comprising 3 CDRs as follows: CDR-H1 comprising the amino acid sequence of SEQ ID NO: 70; CDR-H2 comprising the amino acid sequence of SEQ ID NO: 77; and CDR-H3 comprising the amino acid sequence of SEQ ID NO: 80; and / or a VL comprising 3 CDRs as follows: CDR-L1 comprising the amino acid sequence of SEQ ID NO: 84; CDR-L2 comprising the amino acid sequence of SEQ ID NO: 88; and CDR-L3 comprising the amino acid sequence of SEQ ID NO: 91; (3f) a VH comprising 3 CDRs as follows: CDR-H1 comprising the amino acid sequence of SEQ ID NO: 70; CDR-H2 comprising the amino acid sequence of SEQ ID NO: 75; and CDR-H3 comprising the amino acid sequence of SEQ ID NO: 80; and / or a VL comprising 3 CDRs as follows: CDR-L1 comprising the amino acid sequence of SEQ ID NO: 83; CDR-L2 comprising the amino acid sequence of SEQ ID NO: 87; and CDR-L3 comprising the amino acid sequence of SEQ ID NO: 91; (3g) a VH comprising 3 CDRs as follows: CDR-H1 comprising the amino acid sequence of SEQ ID NO: 95; CDR-H2 comprising the amino acid sequence of SEQ ID NO: 105; and CDR-H3 comprising the amino acid sequence of SEQ ID NO: 108; and / or a VL comprising 3 CDRs as follows: CDR-L1 comprising the amino acid sequence of SEQ ID NO: 114; CDR-L2 comprising the amino acid sequence of SEQ ID NO: 117; and CDR-L3 comprising the amino acid sequence of SEQ ID NO: 119; or (3h) a VH comprising 3 CDRs as follows: CDR-H1 comprising the amino acid sequence of SEQ ID NO: 95; CDR-H2 comprising the amino acid sequence of SEQ ID NO: 100; and CDR-H3 comprising the amino acid sequence of SEQ ID NO: 108; and / or a VL comprising 3 CDRs as follows: CDR-L1 comprising the amino acid sequence of SEQ ID NO: 111; CDR-L2 comprising the amino acid sequence of SEQ ID NO: 117; and CDR-L3 comprising the amino acid sequence of SEQ ID NO: 119.
[0074] In certain embodiments, the antibody or the antigen-binding fragment thereof comprises the following VH and / or VL, wherein the CDRs are defined according to the Contact numbering system: (4a) a VH comprising 3 CDRs as follows: CDR-H1 comprising the amino acid sequence of SEQ ID NO: 20; CDR-H2 comprising the amino acid sequence of SEQ ID NO: 30; and CDR-H3 comprising the amino acid sequence of SEQ ID NO: 33; and / or a VL comprising 3 CDRs as follows: CDR-L1 comprising the amino acid sequence of SEQ ID NO: 36; CDR-L2 comprising the amino acid sequence of SEQ ID NO: 40; and CDR-L3 comprising the amino acid sequence of SEQ ID NO: 43; (4b) a VH comprising 3 CDRs as follows: CDR-H1 comprising the amino acid sequence of SEQ ID NO: 20; CDR-H2 comprising the amino acid sequence of SEQ ID NO: 25; and CDR-H3 comprising the amino acid sequence of SEQ ID NO: 33; and / or a VL comprising 3 CDRs as follows: CDR-L1 comprising the amino acid sequence of SEQ ID NO: 36; CDR-L2 comprising the amino acid sequence of SEQ ID NO: 39; and CDR-L3 comprising the amino acid sequence of SEQ ID NO: 43; (4c) a VH comprising 3 CDRs as follows: CDR-H1 comprising the amino acid sequence of SEQ ID NO: 47; CDR-H2 comprising the amino acid sequence of SEQ ID NO: 53; and CDR-H3 comprising the amino acid sequence of SEQ ID NO: 56; and / or a VL comprising 3 CDRs as follows: CDR-L1 comprising the amino acid sequence of SEQ ID NO: 59; CDR-L2 comprising the amino acid sequence of SEQ ID NO: 64; and CDR-L3 comprising the amino acid sequence of SEQ ID NO: 67; (4d) a VH comprising 3 CDRs as follows: CDR-H1 comprising the amino acid sequence of SEQ ID NO: 47; CDR-H2 comprising the amino acid sequence of SEQ ID NO: 53; and CDR-H3 comprising the amino acid sequence of SEQ ID NO: 56; and / or a VL comprising 3 CDRs as follows: CDR-L1 comprising the amino acid sequence of SEQ ID NO: 59; CDR-L2 comprising the amino acid sequence of SEQ ID NO: 62; and CDR-L3 comprising the amino acid sequence of SEQ ID NO: 67; (4e) a VH comprising 3 CDRs as follows: CDR-H1 comprising the amino acid sequence of SEQ ID NO: 71; CDR-H2 comprising the amino acid sequence of SEQ ID NO: 78; and CDR-H3 comprising the amino acid sequence of SEQ ID NO: 81; and / or a VL comprising 3 CDRs as follows: CDR-L1 comprising the amino acid sequence of SEQ ID NO: 85; CDR-L2 comprising the amino acid sequence of SEQ ID NO: 89; and CDR-L3 comprising the amino acid sequence of SEQ ID NO: 92; (4f) a VH comprising 3 CDRs as follows: CDR-H1 comprising the amino acid sequence of SEQ ID NO: 71; CDR-H2 comprising the amino acid sequence of SEQ ID NO: 76; and CDR-H3 comprising the amino acid sequence of SEQ ID NO: 81; and / or a VL comprising 3 CDRs as follows: CDR-L1 comprising the amino acid sequence of SEQ ID NO: 85; CDR-L2 comprising the amino acid sequence of SEQ ID NO: 89; and CDR-L3 comprising the amino acid sequence of SEQ ID NO: 92; (4g) a VH comprising 3 CDRs as follows: CDR-H1 comprising the amino acid sequence of SEQ ID NO: 96; CDR-H2 comprising the amino acid sequence of SEQ ID NO: 106; and CDR-H3 comprising the amino acid sequence of SEQ ID NO: 109; and / or a VL comprising 3 CDRs as follows: CDR-L1 comprising the amino acid sequence of SEQ ID NO: 115; CDR-L2 comprising the amino acid sequence of SEQ ID NO: 118; and CDR-L3 comprising the amino acid sequence of SEQ ID NO: 120; or (4h) a VH comprising 3 CDRs as follows: CDR-H1 comprising the amino acid sequence of SEQ ID NO: 96; CDR-H2 comprising the amino acid sequence of SEQ ID NO: 101; and CDR-H3 comprising the amino acid sequence of SEQ ID NO: 109; and / or a VL comprising 3 CDRs as follows: CDR-L1 comprising the amino acid sequence of SEQ ID NO: 112; CDR-L2 comprising the amino acid sequence of SEQ ID NO: 118; and CDR-L3 comprising the amino acid sequence of SEQ ID NO: 120.
[0075] In certain embodiments, the antibody or the antigen-binding fragment thereof comprises the following VH and / or VL, wherein the CDRs are defined according to the IMGT numbering system: (5a) a VH comprising 3 CDRs as follows: CDR-H1 comprising the amino acid sequence of SEQ ID NO: 21; CDR-H2 comprising the amino acid sequence of SEQ ID NO: 31; and CDR-H3 comprising the amino acid sequence of SEQ ID NO: 34; and / or a VL comprising 3 CDRs as follows: CDR-L1 comprising the amino acid sequence of SEQ ID NO: 37; CDR-L2 comprising the amino acid sequence of SEQ ID NO: 41; and CDR-L3 comprising the amino acid sequence of SEQ ID NO: 42; (5b) a VH comprising 3 CDRs as follows: CDR-H1 comprising the amino acid sequence of SEQ ID NO: 21; CDR-H2 comprising the amino acid sequence of SEQ ID NO: 26; and CDR-H3 comprising the amino acid sequence of SEQ ID NO: 34; and / or a VL comprising 3 CDRs as follows: CDR-L1 comprising the amino acid sequence of SEQ ID NO: 37; CDR-L2 comprising the amino acid sequence of SEQ ID NO: 41; and CDR-L3 comprising the amino acid sequence of SEQ ID NO: 42; (5c) a VH comprising 3 CDRs as follows: CDR-H1 comprising the amino acid sequence of SEQ ID NO: 48; CDR-H2 comprising the amino acid sequence of SEQ ID NO: 54; and CDR-H3 comprising the amino acid sequence of SEQ ID NO: 57; and / or a VL comprising 3 CDRs as follows: CDR-L1 comprising the amino acid sequence of SEQ ID NO: 60; CDR-L2 comprising the amino acid sequence of SEQ ID NO: 65; and CDR-L3 comprising the amino acid sequence of SEQ ID NO: 66; (5d) a VH comprising 3 CDRs as follows: CDR-H1 comprising the amino acid sequence of SEQ ID NO: 72; CDR-H2 comprising the amino acid sequence of SEQ ID NO: 79; and CDR-H3 comprising the amino acid sequence of SEQ ID NO: 82; and / or a VL comprising 3 CDRs as follows: CDR-L1 comprising the amino acid sequence of SEQ ID NO: 86; CDR-L2 comprising the amino acid sequence of SEQ ID NO: 90; and CDR-L3 comprising the amino acid sequence of SEQ ID NO: 91; (5e) a VH comprising 3 CDRs as follows: CDR-H1 comprising the amino acid sequence of SEQ ID NO: 97; CDR-H2 comprising the amino acid sequence of SEQ ID NO: 107; and CDR-H3 comprising the amino acid sequence of SEQ ID NO: 110; and / or a VL comprising 3 CDRs as follows: CDR-L1 comprising the amino acid sequence of SEQ ID NO: 116; CDR-L2 comprising the amino acid sequence of SEQ ID NO: 41; and CDR-L3 comprising the amino acid sequence of SEQ ID NO: 119; or (5f) a VH comprising 3 CDRs as follows: CDR-H1 comprising the amino acid sequence of SEQ ID NO: 97; CDR-H2 comprising the amino acid sequence of SEQ ID NO: 102; and CDR-H3 comprising the amino acid sequence of SEQ ID NO: 110; and / or a VL comprising 3 CDRs as follows: CDR-L1 comprising the amino acid sequence of SEQ ID NO: 113; CDR-L2 comprising the amino acid sequence of SEQ ID NO: 41; and CDR-L3 comprising the amino acid sequence of SEQ ID NO: 119.
[0076] In certain embodiments, the antibody or the antigen binding fragment thereof comprises a VH comprising an amino acid sequence that is at least 75%, 80%, 85%, 90%, 95%, or 100%(e.g., at least 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, or 99%) identical to the amino acid sequence set forth in SEQ ID NO: 1, 3, 5, 7, 9, 11, 13 or 15. In certain embodiments, the antibody or the antigen binding fragment thereof comprises a VH comprising an amino acid sequence set forth in SEQ ID NO: 1, 3, 5, 7, 9, 11, 13 or 15. In certain embodiments, the antibody or the antigen binding fragment thereof comprises a VH consisting of an amino acid sequence set forth in SEQ ID NO: 1, 3, 5, 7, 9, 11, 13 or 15.
[0077] In certain embodiments, the antibody or the antigen binding fragment thereof comprises a VL comprising an amino acid sequence that is at least 75%, 80%, 85%, 90%, 95%, or 100%(e.g., at least 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, or 99%) identical to the amino acid sequence set forth in SEQ ID NO: 2, 4, 6, 8, 10, 12, 14 or 16. In certain embodiments, the antibody or the antigen binding fragment thereof comprises a VL comprising an amino acid sequence set forth in SEQ ID NO: 2, 4, 6, 8, 10, 12, 14 or 16. In certain embodiments, the antibody or the antigen binding fragment thereof comprises a VL consisting of an amino acid sequence set forth in SEQ ID NO: 2, 4, 6, 8, 10, 12, 14 or 16.
[0078] In certain embodiments, the antibody or the antigen-binding fragment thereof of the disclosure comprises: (a) a VH comprising the amino acid sequence set forth in SEQ ID NO: 3 or a variant thereof and / or a VL comprising the amino acid sequence set forth in SEQ ID NO: 4 or a variant thereof; (b) a VH comprising the amino acid sequence set forth in SEQ ID NO: 1 or a variant thereof and / or a VL comprising the amino acid sequence set forth in SEQ ID NO: 2 or a variant thereof; (c) a VH comprising the amino acid sequence set forth in SEQ ID NO: 7 or a variant thereof and / or a VL comprising the amino acid sequence set forth in SEQ ID NO: 8 or a variant thereof; (d) a VH comprising the amino acid sequence set forth in SEQ ID NO: 5 or a variant thereof and / or a VL comprising the amino acid sequence set forth in SEQ ID NO: 6 or a variant thereof; (e) a VH comprising the amino acid sequence set forth in SEQ ID NO: 11 or a variant thereof and / or a VL comprising the amino acid sequence set forth in SEQ ID NO: 12 or a variant thereof; (f) a VH comprising the amino acid sequence set forth in SEQ ID NO: 9 or a variant thereof and / or a VL comprising the amino acid sequence set forth in SEQ ID NO: 10 or a variant thereof; (g) a VH comprising the amino acid sequence set forth in SEQ ID NO: 15 or a variant thereof and / or a VL comprising the amino acid sequence set forth in SEQ ID NO: 16 or a variant thereof; or (h) a VH comprising the amino acid sequence set forth in SEQ ID NO: 13 or a variant thereof and / or a VL comprising the amino acid sequence set forth in SEQ ID NO: 14 or a variant thereof; wherein the variant has at least 80%, at least 85%, at least 90%, at least 91%, at least 92%, at least 93%, at least 94%, at least 95%, at least 96%, at least 97%, at least 98%, at least 99%or 100%sequence identity compared to the sequence from which it is derived, or has a substitution, deletion or addition of one or several amino acids (for example, a substitution, deletion or addition of 1, 2, 3, 4, or 5 amino acids) compared to the sequence from which it is derived; and particular embodiments, the substitution is a conservative substitution.
[0079] In certain embodiments, the antibody or the antigen-binding fragment thereof of the disclosure comprises: (a) a VH comprising the amino acid sequence set forth in SEQ ID NO: 3 and a VL comprising the amino acid sequence set forth in SEQ ID NO: 4; (b) a VH comprising the amino acid sequence set forth in SEQ ID NO: 1 and a VL comprising the amino acid sequence set forth in SEQ ID NO: 2; (c) a VH comprising the amino acid sequence set forth in SEQ ID NO: 7 and a VL comprising the amino acid sequence set forth in SEQ ID NO: 8; (d) a VH comprising the amino acid sequence set forth in SEQ ID NO: 5 and a VL comprising the amino acid sequence set forth in SEQ ID NO: 6; (e) a VH comprising the amino acid sequence set forth in SEQ ID NO: 11 and the amino acid VL comprising the amino acid sequence set forth in SEQ ID NO: 12; (f) a VH comprising the amino acid sequence set forth in SEQ ID NO: 9 and a VL comprising the amino acid sequence set forth in SEQ ID NO: 10; (g) a VH comprising the amino acid sequence set forth in SEQ ID NO: 15 and a VL comprising the amino acid sequence set forth in SEQ ID NO: 16; or (h) a VH comprising the amino acid sequence set forth in SEQ ID NO: 13 and a VL comprising the amino acid sequence set forth in SEQ ID NO: 14.
[0080] In certain embodiments, the antibody or the antigen-binding fragment disclosed herein comprises an antibody or an antigen-binding fragment specifically binding to an antigen, and may comprise a post-translational modification thereof (for example, cleavage of C-terminal lysine in a heavy chain, and conversion of N-terminal glutamine or glutamic acid in a heavy chain or a light chain into pyroglutamic acid or pyroglutamate) , which may occur at the time of recombinant expression in a host cell (for example, a CHO cell) or during purification / storage.
[0081] In certain embodiments of the antibody or the antigen-binding fragment disclosed herein, a heavy chain constant domain may comprise C-terminal lysine or lack C-terminal lysine or C-terminal glycine-lysine dipeptide. In some embodiments of an antibody or an antigen-binding fragment thereof, an N-terminal amino acid of the antibody or the antigen-binding fragment thereof may be cyclized to pyroglutamic acid. In some embodiments of an antibody or an antigen-binding fragment thereof, an N-terminal amino acid of the antibody or the antigen-binding fragment thereof may be cyclized to pyroglutamate.
[0082] As is known to those skilled in the art, pyroglutamic acid is a conjugate acid of pyroglutamate and is in mutual equilibrium with pyroglutamate in a solution.
[0083] In certain embodiments, provided herein is a composition comprising the antibody or the antigen-binding fragment disclosed herein, wherein various antibodies or antigen-binding fragments can independently comprise C-terminal lysine, lack C-terminal lysine, lack C-terminal glycine-lysine and / or comprise N-terminal glutamine or glutamic acid, cyclization of an N-terminal amino acid to pyroglutamic acid or cyclization of the N-terminal amino acid to pyroglutamate.
[0084] In certain embodiments, N-terminal glutamine of the VH comprising the amino acid sequence set forth in any one of SEQ ID NOs: 3, 1, 7, 5, 11, 9, 15 and 13 or a variant thereof is subjected to cyclization to form pyroglutamic acid or pyroglutamate.
[0085] In certain embodiments, the antibody or the antigen-binding fragment thereof of any embodiment above further has a feature selected from the following: (1) specifically binding to human or monkey CDH3, for example, as determined by ELISA or flow cytometry; (2) not binding or substantially not binding to CDH1 and CDH2, for example, as determined by flow cytometry; (3) having a reduced or eliminated ADCC activity and / or ADCP activity and / or CDC activity; (4) having a reduced CDC activity; (5) inducing CDH3 internalization, for example, as determined by flow cytometry; (6) inhibiting proliferation of a cell (such as a tumor cell) ; and / or (7) inhibiting tumor growth.
[0086] In certain embodiments, the antibody or the antigen-binding fragment thereof of any embodiment above may comprise a constant region from or derived from human immunoglobulin.
[0087] In certain embodiments, a heavy chain of the antibody or the antigen-binding fragment thereof comprises a heavy chain constant region from or derived from human immunoglobulin (for example, IgG1, IgG2, IgG3, or IgG4) . In certain embodiments, a heavy chain of the antibody or the antigen-binding fragment thereof comprises a wild-type Fc region, or comprises a mutated or chemically modified Fc region, which has an altered effector function (for example, a reduced ADCC activity, ADCP activity and / or CDC activity) compared to the wild-type Fc region. In certain exemplary embodiments, the antibody or the antigen-binding fragment thereof of the disclosure comprises a variant of a human IgG1 heavy chain constant region, and the variant has the following substitutions compared to the wild-type sequence from which it is derived: Leu234Ala, Leu235Ala, and Gly237Ala (positions according to the EU numbering system) . In such embodiments, the antibody or the antigen-binding fragment thereof of the disclosure has a reduced ADCC activity, ADCP activity and / or CDC activity. In certain embodiments, the antibody or the antigen-binding fragment thereof comprises a variant of a human IgG1 heavy chain constant region comprises the amino acid sequence set forth in SEQ ID NO: 122. In certain embodiments, the CH comprises the amino acid sequence set forth in SEQ ID NO: 122 or a variant thereof lacks C-terminal lysine. In certain embodiments, a heavy chain of the antibody or the antigen-binding fragment thereof comprises the amino acid sequence set forth in SEQ ID NO: 121 or a variant thereof, and the variant has a conservative substitution of at most 20 amino acids (for example, a conservative substitution of at most 15, at most 10, or at most 5 amino acids; for example, a conservative substitution of 1, 2, 3, 4, or 5 amino acids) compared thereto. In certain embodiments, the CH comprises the amino acid sequence set forth in SEQ ID NO: 121 or a variant thereof lacking a C-terminal lysine.
[0088] In certain embodiments, a light chain of the antibody or the antigen-binding fragment thereof comprises a light chain constant region from or derived from human immunoglobulin (for example, κ or λ) . In certain embodiments, a light chain of the antibody or the antigen-binding fragment thereof comprises the amino acid sequence set forth in SEQ ID NO: 123 or a variant thereof, and the variant has a conservative substitution of at most 20 amino acids (for example, a conservative substitution of at most 15, at most 10, or at most 5 amino acids; for example, a conservative substitution of 1, 2, 3, 4, or 5 amino acids) compared thereto. In certain embodiments, a light chain of the antibody or the antigen-binding fragment thereof comprises the amino acid sequence set forth in SEQ ID NO: 144 or a variant thereof, and the variant has a conservative substitution of at most 20 amino acids (for example, a conservative substitution of at most 15, at most 10, or at most 5 amino acids; for example, a conservative substitution of 1, 2, 3, 4, or 5 amino acids) compared thereto.
[0089] In certain embodiments, the antibody or the antigen-binding fragment thereof of the disclosure comprises: (1) a heavy chain comprising a VH comprising the amino acid sequence set forth in SEQ ID NO: 3 and a heavy chain constant region (CH) comprising the amino acid sequence set forth in SEQ ID NO: 122, and a light chain comprising a VL comprising the amino acid sequence set forth in SEQ ID NO: 4 and a light chain constant region (CL) comprising the amino acid sequence set forth in SEQ ID NO: 123; (2) a heavy chain comprising a VH comprising the amino acid sequence set forth in SEQ ID NO: 3 and a CH comprising the amino acid sequence set forth in SEQ ID NO: 121, and a light chain comprising a VL comprising the amino acid sequence set forth in SEQ ID NO: 4 and a CL comprising the amino acid sequence set forth in SEQ ID NO: 123; (3) a heavy chain comprising a VH comprising the amino acid sequence set forth in SEQ ID NO: 1 and a CH comprising the amino acid sequence set forth in SEQ ID NO: 121, and a light chain comprising a VL comprising the amino acid sequence set forth in SEQ ID NO: 2 and a CL comprising the amino acid sequence set forth in SEQ ID NO: 123; (4) a heavy chain comprising a VH comprising the amino acid sequence set forth in SEQ ID NO: 7 and a CH set forth in SEQ ID NO: 121, and a light chain comprising a VL comprising the amino acid sequence set forth in SEQ ID NO: 8 and a CL comprising the amino acid sequence set forth in SEQ ID NO: 144; (5) a heavy chain comprising a VH comprising the amino acid sequence set forth in SEQ ID NO: 5 and a CH comprising the amino acid sequence set forth in SEQ ID NO: 121, and a light chain comprising a VL comprising the amino acid sequence set forth in SEQ ID NO: 6 and a CL comprising the amino acid sequence set forth in SEQ ID NO: 144; (6) a heavy chain comprising a VH comprising the amino acid sequence set forth in SEQ ID NO: 11 and a CH comprising the amino acid sequence set forth in SEQ ID NO: 121, and a light chain comprising a VL comprising the amino acid sequence set forth in SEQ ID NO: 12 and a CL comprising the amino acid sequence set forth in SEQ ID NO: 123; (7) a heavy chain comprising a VH comprising the amino acid sequence set forth in SEQ ID NO: 9 and a CH comprising the amino acid sequence set forth in SEQ ID NO: 121, and a light chain comprising a VL comprising the amino acid sequence set forth in SEQ ID NO: 10 and a CL comprising the amino acid sequence set forth in SEQ ID NO: 123; (8) a heavy chain comprising a VH comprising the amino acid sequence set forth in SEQ ID NO: 15 and a CH comprising the amino acid sequence set forth in SEQ ID NO: 121, and a light chain comprising a VL comprising the amino acid sequence set forth in SEQ ID NO: 16 and a CL comprising the amino acid sequence set forth in SEQ ID NO: 123; or (9) a heavy chain comprising a VH comprising the amino acid sequence set forth in SEQ ID NO: 13 and a CH comprising the amino acid sequence set forth in SEQ ID NO: 121, and a light chain comprising a VL comprising the amino acid sequence set forth in SEQ ID NO: 14 and a CL comprising the amino acid sequence set forth in SEQ ID NO: 123.
[0090] In certain embodiments, the antibody or the antigen-binding fragment thereof of the disclosure comprises: (1) a heavy chain comprising the amino acid sequence set forth in SEQ ID NO: 126, and a light chain comprising the amino acid sequence set forth in SEQ ID NO: 125; (2) a heavy chain comprising the amino acid sequence set forth in SEQ ID NO: 124, and a light chain comprising the amino acid sequence set forth in SEQ ID NO: 125; (3) a heavy chain comprising the amino acid sequence set forth in SEQ ID NO: 127, and a light chain comprising the amino acid sequence set forth in SEQ ID NO: 128; (4) a heavy chain comprising the amino acid sequence set forth in SEQ ID NO: 129, and a light chain comprising the amino acid sequence set forth in SEQ ID NO: 130; (5) a heavy chain comprising the amino acid sequence set forth in SEQ ID NO: 131, and a light chain comprising the amino acid sequence set forth in SEQ ID NO: 132; (6) a heavy chain comprising the amino acid sequence set forth in SEQ ID NO: 133, and a light chain comprising the amino acid sequence set forth in SEQ ID NO: 134; (7) a heavy chain comprising the amino acid sequence set forth in SEQ ID NO: 135, and a light chain comprising the amino acid sequence set forth in SEQ ID NO: 136; (8) a heavy chain comprising the amino acid sequence set forth in SEQ ID NO: 137, and a light chain comprising the amino acid sequence set forth in SEQ ID NO: 138; or (9) a heavy chain comprising the amino acid sequence set forth in SEQ ID NO: 139, and a light chain comprising the amino acid sequence set forth in SEQ ID NO: 140.
[0091] In certain embodiments, an N-terminal glutamine of the heavy chain having the amino acid sequence set forth in any one of SEQ ID NOs: 126, 124, 127, 129, 131, 133, 135, 137, and 139 is subjected to cyclization to form pyroglutamic acid or pyroglutamate.
[0092] In certain embodiments, the heavy chain comprising the amino acid sequence set forth in any one of SEQ ID NOs: 126, 124, 127, 129, 131, 133, 135, 137, and 139 is lacking a C-terminal lysine.
[0093] In certain embodiments, a N-terminal glutamine of the heavy chain comprising the amino acid sequence set forth in any one of SEQ ID NOs: 126, 124, 127, 129, 131, 133, 135, 137, and 139 is subjected to cyclization to form pyroglutamic acid or pyroglutamate, and the C-terminal lysine of the heavy chain is lacking.
[0094] In certain embodiments, the antibody of the disclosure comprises: a heavy chain comprising the amino acid sequence set forth in SEQ ID NO: 126 and a light chain comprising the amino acid sequence set forth in SEQ ID NO: 125.
[0095] In certain embodiments, the antibody of the disclosure comprises: a heavy chain comprising the amino acid sequence set forth in SEQ ID NO: 141 and a light chain comprising the amino acid sequence set forth in SEQ ID NO: 125.
[0096] In certain embodiments, the antibody of the disclosure comprises: a heavy chain comprising the amino acid sequence set forth in SEQ ID NO: 142 and a light chain comprising the amino acid sequence set forth in SEQ ID NO: 125.
[0097] In certain embodiments, the antibody of the disclosure comprises: a heavy chain comprising the amino acid sequence set forth in SEQ ID NO: 143 and a light chain comprising the amino acid sequence set forth in SEQ ID NO: 125.
[0098] In certain embodiments, the antibody or the antigen-binding fragment thereof of any embodiment above is selected from a murine antibody, a chimeric antibody, and a humanized antibody.
[0099] In certain embodiments, a variable region of the antibody or the antigen-binding fragment thereof of any embodiment above is human-derived.
[0100] In certain embodiments, the antibody or the antigen-binding fragment thereof of any embodiment above is selected from an ScFv, a Fab, a Fab', a F (ab') 2, a Fab'-SH, a Fv fragment, a disulfide-linked Fv (dsFv) , a diabody, a bispecific antibody, and a multispecific antibody.
[0101] In certain embodiments, the antibody or the antigen-binding fragment thereof of any embodiment above has a label. In certain embodiments, the antibody or the antigen-binding fragment thereof has a detectable label, for example, an enzyme (for example, horseradish peroxidase) , a radionuclide, a fluorescent dye, a luminescent substance (such as a chemiluminescent substance) , or biotin.
[0102] The disclosure further provides use of the antibody or antigen-binding fragment or a pharmaceutical composition thereof provided herein for tumor treatment.
[0103] In certain embodiments, the epitope of an antibody can be determined by, e.g., NMR spectroscopy, surface plasmon resonance X-ray diffraction crystallography studies, ELISA assays, hydrogen / deuterium exchange coupled with mass spectrometry (e.g., liquid chromatography electrospray mass spectrometry) , array-based oligo-peptide scanning assays, and / or mutagenesis mapping (e.g., site-directed mutagenesis mapping) . For X-ray crystallography, crystallization may be accomplished using any of the known methods in the art (e.g., Giegé R et al., (1994) Acta Crystallogr D Biol Crystallogr 50 (Pt 4) : 339-350; McPherson A (1990) Eur J Biochem 189: 1-23; Chayen NE (1997) Structure 5: 1269-1274; McPherson A (1976) J Biol Chem 251: 6300-6303, all of which are herein incorporated by reference in their entireties) . Antibody: antigen crystals may be studied using well known X-ray diffraction techniques and may be refined using computer software such as X-PLOR (Yale University, 1992, distributed by Molecular Simulations, Inc. ; see, e.g., Meth Enzymol (1985) volumes 114 &115, eds. Wyckoff HW et al. ; U.S. Patent Application No. 2004 / 0014194) , and BUSTER (Bricogne G (1993) Acta Crystallogr D Biol Crystallogr 49 (Pt 1) : 37-60; Bricogne G (1997) Meth Enzymol 276A: 361-423, ed Carter CW; Roversi P et al., (2000) Acta Crystallogr D Biol Crystallogr 56 (Pt 10) : 1316-1323, all of which are herein incorporated by reference in their entireties) . Mutagenesis mapping studies may be accomplished using any method known to one of skill in the art. See, e.g., Champe M et al., (1995) and Cunningham BC &Wells JA (1989) for a description of mutagenesis techniques, including alanine scanning mutagenesis techniques. In a specific embodiment, the epitope of an antibody is determined using alanine scanning mutagenesis studies. In addition, antibodies that recognize and bind to the same or overlapping epitopes of CDH3 can be identified using routine techniques such as an immunoassay, for example, by showing the ability of one antibody to block the binding of another antibody to a target antigen, i.e., a competitive binding assay. Competition binding assays also can be used to determine whether two antibodies have similar binding specificity for an epitope. Competitive binding can be determined in an assay in which the immunoglobulin under test inhibits specific binding of a reference antibody to a common antigen, such as CDH3. Numerous types of competitive binding assays are known, for example: solid phase direct or indirect radioimmunoassay (RIA) , solid phase direct or indirect enzyme immunoassay (EIA) , sandwich competition assay (see Stahli C et al., (1983) Methods Enzymol 9: 242-253) ; solid phase direct biotin-avidin EIA (see Kirkland TN et al., (1986) J Immunol 137: 3614-9) ; solid phase direct labeled assay, solid phase direct labeled sandwich assay (see Harlow E &Lane D, (1988) Antibodies: A Laboratory Manual, Cold Spring Harbor Press) ; solid phase direct label RIA using I-125 label (see Morel GA et al., (1988) Mol Immunol 25 (1) : 7-15) ; solid phase direct biotin-avidin EIA (see Cheung RC et al., (1990) Virology 176: 546-52) ; and direct labeled RIA (see Moldenhauer G et al., (1990) Scand J Immunol 32: 77-82) , all of which are herein incorporated by reference in their entireties. Typically, such an assay involves the use of purified antigen (e.g., CDH3) bound to a solid surface or cells bearing either of these, an unlabeled test immunoglobulin and a labeled reference immunoglobulin. Competitive inhibition can be measured by determining the amount of label bound to the solid surface or cells in the presence of the test immunoglobulin. Usually, the test immunoglobulin is present in excess. Usually, when a competing antibody is present in excess, it will inhibit specific binding of a reference or antibody to a common antigen by at least 50-55%, 55-60%, 60-65%, 65-70%, 70-75%, or more. A competition binding assay can be configured in a large number of different formats using either labeled antigen or labeled antibody. In a common version of this assay, the antigen is immobilized on a 96-well plate. The ability of unlabeled antibodies to block the binding of labeled antibodies to the antigen is then measured using radioactive or enzyme labels. For further details see, e.g., Wagener C et al., (1983) J Immunol 130: 2308-2315; Wagener C et al., (1984) J Immunol Methods 68: 269-274; Kuroki M et al., (1990) Cancer Res 50: 4872-4879; Kuroki M et al., (1992) Immunol Invest 21: 523-538; Kuroki M et al., (1992) Hybridoma 11: 391-407 and Antibodies: A Laboratory Manual, Ed Harlow E &Lane D editors supra, pp. 386-389, all of which are herein incorporated by reference in their entirety. The antibody or the antigen-binding fragment thereof of the disclosure may be derivatized, for example, attached to another molecule (for example, another polypeptide or protein) . Generally, the derivatization (for example, labeling) of the antibody or the antigen-binding fragment thereof will not adversely affect the binding thereof to CDH3 (particularly human CDH3) . Therefore, the antibody or the antigen-binding fragment thereof of the disclosure is also intended to comprise such derivatized forms. For example, the antibody or the antigen-binding fragment thereof of the disclosure may be functionally attached (by chemical conjugation, genetic fusion, non-covalent linkage or other means) to one or more other molecular groups, for example, another antibody (for example, to form a bispecific antibody) , a detection reagent, a pharmaceutical reagent, and / or a protein or polypeptide capable of mediating the binding of the antibody or the antigen-binding fragment to another molecule (for example, avidin or a plurality of groups of polyhistidine tags) .
[0104] As one of the derivatives of the antibody, the disclosure provides a conjugate comprising the antibody or the antigen-binding fragment thereof of the disclosure and a conjugation moiety.
[0105] In certain embodiments, the conjugation moiety is selected from detectable labels. The detectable label of the disclosure can be any substance detectable by fluorescent, spectroscopic, photochemical, biochemical, immunological, electrical, optical or chemical means. Such labels are well known in the art, and examples thereof include, but are not limited to, enzymes (for example, horseradish peroxidase, alkaline phosphatase, β-galactosidase, urease, glucose oxidase, etc. ) , radionuclides (for example, 3H, 125I, 35S, 14C, or 32P) , fluorescent dyes (for example, fluorescein isothiocyanate (FITC) , fluorescein, tetramethylrhodamine isothiocyanate (TRITC) , phycoerythrin (PE) , Texas Red, rhodamine, quantum dots or cyanine dye derivatives (for example, Cy7, Alexa 750) ) , acridinium ester compounds, magnetic beads (for example, ) , calorimetric labels, for example, colloidal gold or colored glass or plastic (for example, polystyrene, polypropylene, latex, etc. ) beads, and biotin for binding to avidin (for example, streptavidin) modified with the above labels. In certain embodiments, such labels can be suitable for use in immunological detection (for example, enzyme-linked immunosorbent assay, radioimmunoassay, fluorescent immunoassay, chemiluminescent immunoassay) . In certain embodiments, the detectable label is selected from radioisotopes, fluorescent substances, luminescent substances, colored substances and enzymes. In certain embodiments, the detectable label as described above can be attached to the antibody or the antigen-binding fragment thereof of the disclosure by the linkers of different lengths to reduce potential steric hindrance.
[0106] In certain embodiments, the conjugation moiety is selected from therapeutic agents. In certain embodiments, the therapeutic agent is an anti-tumor agent, for example, a cytotoxic agent, a cytokine, a toxin or a radionuclide.
[0107] In certain embodiments, the conjugation moiety is selected from the substances that can improve the biological properties (for example, increase serum half-life) of the antibody, for example, they can be chemical groups, for example, polyethylene glycol (PEG) , methyl or ethyl or glycosyl.
[0108] As one of the derivatives of the antibody, the disclosure provides a multispecific antibody comprising the antibody or the antigen-binding fragment thereof of the disclosure.
[0109] In certain embodiments, the multispecific antibody comprises the antibody or the antigen-binding fragment thereof of the disclosure as a first antigen-binding domain, and further comprises at least one second antigen-binding domain for other targets.
[0110] In certain embodiments, each antigen-binding domain of the multispecific antibody maintains its original binding specificity.
[0111] In certain embodiments, the multispecific antibody is a bispecific antibody or a trispecific antibody or a tetraspecific antibody.
[0112] As one of the derivatives of the antibody, the disclosure provides a chimeric antigen receptor comprising the antibody or the antigen-binding fragment thereof of the disclosure. In certain embodiments, the chimeric antigen receptor comprises the antibody or the antigen-binding fragment thereof (for example, ScFv) of the disclosure as an extracellular antigen-binding domain that specifically binds to CDH3, as well as a transmembrane domain and one or more intracellular T cell signaling domains. At the same time, the disclosure provides a host cell (for example, an immune cell, for example, T lymphocytes, NK cells, DC cells, macrophages) containing or expressing the chimeric antigen receptor. Polypeptides
[0113] In another aspect, provided herein are polypeptides comprising one or more LCDR, HCDR, VH, and / or VL amino acid sequences as described above. In certain embodiments, the polypeptide comprises the LCDR1, LCDR2, and / or LCDR3 of the VL amino acid sequence set forth in any one of SEQ ID NOs: 2, 4, 6, 8, 10, 12, 14, and 16 as determined by any of the methods discussed above. In certain embodiments, the polypeptide comprises a VL comprising the LCDR1, LCDR2, and LCDR3 of the VL amino acid sequence set forth in any one of SEQ ID NOs: 2, 4, 6, 8, 10, 12, 14, and 16. In certain embodiments, the polypeptide comprises the LCDR1, LCDR2, and / or LCDR3 amino acid sequences set forth in SEQ ID NOs: 35, 38, and 42; 36, 39, and 43; 37, 41, and 42; 36, 40, and 43; 58, 61 and 66; 59, 62, and 67; 60, 65, and 66; 58, 63, and 66; 59, 64, and 67; 83, 87, and 91; 85, 89, and 92; 86, 90 and 91; 84, 88, and 91; 111, 117, and 119; 112, 118, and 120; 113, 41, and 119; 114, 117, and 119; 115, 118, and 120; or 116, 41, and 119, respectively.
[0114] In certain embodiments, the polypeptide comprises the HCDR1, HCDR2, and / or HCDR3 of the VH amino acid sequence set forth in any one of SEQ ID NOs: 1, 3, 5, 7, 9, 11, 13, and 15 as determined by any of the methods discussed above. In certain embodiments, the polypeptide comprises the HCDR1, HCDR2, and HCDR3 of the VH amino acid sequence set forth in any one of SEQ ID NOs: 1, 3, 5, 7, 9, 11, 13, and 15. In certain embodiments, the polypeptide comprises the HCDR1, HCDR2, and / or HCDR3 amino acid sequences set forth in SEQ ID NOs: 17, 22, and 32; 18, 23, and 32; 19, 24, and 32; 20, 25, and 33; 21, 26, and 34; 17, 27, and 32; 18, 28, and 32; 19, 29 and 32; 20, 30, and 33; 21, 31, and 34; 44, 49, and 55; 45, 50, and 55; 46, 51, and 55; 47, 53, and 56; 48, 54, and 57; 46, 52, and 55; 68, 73, and 80; 69, 74, and 80; 70, 75, and 80;71, 76, and 81; 72, 79, and 82; 70, 77, and 80; 71, 78, and 81; 93, 98, and 108; 94, 99, and 108; 95, 100, and 108; 96, 101, and 109; 97, 102, and 110; 93, 103 and 108; 94, 104, and 108; 95, 105, and 108; 96, 106, and 109; or 97, 107, and 110, respectively.
[0115] In certain embodiments, the polypeptide comprises an amino acid sequence that is at least 75%, 80%, 85%, 90%, 95%, or 100% (e.g., at least 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, or 99%) identical to the VL amino acid sequence set forth in any one of SEQ ID NOs: 2, 4, 6, 8, 10, 12, 14, and 16. In certain embodiments, the polypeptide comprises the VL amino acid sequence set forth in any one of SEQ ID NOs: 2, 4, 6, 8, 10, 12, 14, and 16.
[0116] In certain embodiments, the polypeptide comprises an amino acid sequence that is at least 75%, 80%, 85%, 90%, 95%, or 100% (e.g., at least 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, or 99%) identical to the VH amino acid sequence set forth in any one of SEQ ID NOs: 1, 3, 5, 7, 9, 11, 13, and 15. In certain embodiments, the polypeptide comprises the VH amino acid sequence set forth in any one of SEQ ID NOs: 1, 3, 5, 7, 9, 11, 13, and 15. Polynucleotides, vectors, and methods of producing antibodies
[0117] The antibody of the disclosure can be prepared by various methods known in the art, for example, it is obtained by a genetic engineering recombinant technology. For example, a DNA molecule encoding the heavy chain and light chain genes of the antibody of the disclosure is obtained by chemical synthesis or PCR amplification. The resulting DNA molecule is inserted into an expression vector and then transfected into a host cell. Then, the transfected host cell is cultured under specific conditions and the antibody of the disclosure is expressed.
[0118] The antigen-binding fragment of the disclosure can be obtained by hydrolysis of an intact antibody molecule (see Morimoto et al., J. Biochem. Biophys. Methods 24: 107-117 (1992) and Brennan et al., Science 229: 81 (1985) ) . In addition, these antigen-binding fragments can also be directly produced by a recombinant host cell (reviewed in Hudson, Curr. Opin. Immunol. 11: 548-557 (1999) ; Little et al., Immunol. Today, 21: 364-370 (2000) ) . For example, a Fab'fragment can be directly obtained from a host cell; Fab'fragments can be chemically conjugated to form an F (ab') 2 segment (Carter et al., Bio / Technology 10: 163-167 (1992) ) . In addition, Fv, Fab or F (ab') 2 fragments can also be obtained by directly isolating from a recombinant host cell culture medium. Other technologies for preparing these antigen-binding fragments are fully known to those skilled in the art.
[0119] Therefore, in another aspect, the disclosure provides an isolated nucleic acid molecule, comprising a nucleotide sequence encoding an antibody or an antigen-binding fragment thereof or a heavy chain variable region and / or a light chain variable region thereof of the disclosure. According to the codon degeneracy known in the art, in certain embodiments, the nucleotide sequence can be replaced according to the codon degeneracy. In certain embodiments, the nucleotide sequence is codon-optimized.
[0120] In another aspect of the disclosure, the disclosure provides a vector (for example, a cloning vector or an expression vector) , comprising the isolated nucleic acid molecule of the disclosure. In certain embodiments, the vector of the disclosure is, for example, a plasmid, a cosmid, a phage, a lentivirus, etc. In certain embodiments, the vector is capable of expressing the antibody or the antigen-binding fragment thereof of the disclosure in a subject (for example, mammals, for example, human) .
[0121] In certain embodiments, the vector comprises a first nucleotide sequence encoding a heavy chain or a heavy chain variable region of the antibody or the antigen-binding fragment thereof of the disclosure and a second nucleotide sequence encoding a light chain or a light chain variable region thereof, wherein the first nucleotide sequence and the second nucleotide sequence are present on the same or different vectors. When the first nucleotide sequence and the second nucleotide sequence are present on different vectors, the vector of the disclosure comprises a first vector containing the first nucleotide sequence and a second vector containing the second nucleotide sequence.
[0122] In certain embodiments, the antibody or the antigen-binding fragment thereof of the disclosure can be used to construct a chimeric antigen receptor (CAR) , which comprises an extracellular antigen-binding domain (for example, ScFv) specifically binding to CDH3, a transmembrane domain and one or more intracellular T cell signaling domains. In such embodiments, the isolated nucleic acid molecule of the disclosure may comprise a nucleotide sequence encoding a chimeric antigen receptor, which further comprises a nucleotide sequence encoding the antibody or the antigen-binding fragment thereof of the disclosure (for example, ScFv) . In certain embodiments, the isolated nucleic acid molecule of the disclosure encodes a chimeric antigen receptor comprising an antigen-binding fragment (for example, ScFv) of the antibody of the disclosure.
[0123] In certain embodiments, the antibody or the antigen-binding fragment thereof of the disclosure can be used to construct chimeric antigen receptor-modified immune cells, which comprise chimeric antigen receptors (CARs) and immune cells (for example, T lymphocytes, NK cells, DC cells, macrophages) .
[0124] In another aspect of the disclosure, the disclosure provides a host cell, comprising the isolated nucleic acid molecule of the disclosure or the vector of the disclosure. The host cell can be eukaryotic cells (for example, mammalian cells, insect cells, yeast cells) or prokaryotic cells (for example, E. coli) . Suitable eukaryotic cells include, but are not limited to, NS0 cells, Vero cells, Hela cells, COS cells, CHO cells, ExpiCHO cells, HEK293 cells, Expi293 cells, BHK cells and MDCKII cells. Suitable insect cells include, but are not limited to, Sf9 cells. In certain embodiments, the host cell of the disclosure is a mammalian cell, for example, CHO (for example, CHO-K1, CHO-S, CHO DXB11, ExpiCHO, CHO DG44, CHO-EBNA) .
[0125] In certain embodiments, the host cell of the disclosure may be a chimeric antigen receptor T cell (CAR-T) . In such embodiments, the isolated nucleic acid molecule contained in the host cell may comprise the nucleotide sequence encoding the chimeric antigen receptor, which further comprises the nucleotide sequence encoding the antibody or an antigen-binding fragment thereof of the disclosure (for example, ScFv) . In certain embodiments, the isolated nucleic acid molecule contained in the host cell encodes the chimeric antigen receptor comprising the antigen-binding fragment (for example, ScFv) of the antibody of the disclosure.
[0126] In another aspect of the disclosure, the disclosure provides a method of preparing the antibody or the antigen-binding fragment thereof of the disclosure, comprising: culturing the host cell of the disclosure under the condition of allowing the expression of the antibody or the antigen-binding fragment thereof; and recovering the antibody or the antigen-binding fragment thereof from the cultured host cell culture.
[0127] In certain embodiments, the host cell used in the preparation method is a Chinese hamster ovary cell.
[0128] In certain embodiments, the disclosure provides an antibody or an antigen-binding fragment thereof obtainable by the aforementioned preparation method. Therapeutic applications
[0129] Another aspect of the disclosure provides a pharmaceutical composition, comprising the antibody or the antigen-binding fragment thereof, the nucleic acid molecule, the vector, the host cell, the conjugate, the multispecific antibody or the chimeric antigen receptor or the host cell expressing the chimeric antigen receptor of the disclosure and the pharmaceutically acceptable carrier and / or excipient.
[0130] In certain embodiments, the pharmaceutical composition of the disclosure comprises the antibody or the antigen-binding fragment thereof of the disclosure and the pharmaceutically acceptable carrier and / or excipient.
[0131] In certain embodiments, the pharmaceutical composition of the disclosure comprises the vector or the host cell of the disclosure and the pharmaceutically acceptable carrier and / or excipient. In such embodiments, the isolated nucleic acid molecule contained in the vector comprises the nucleotide sequence encoding the chimeric antigen receptor, which further comprises the nucleotide sequence encoding the antibody or an antigen-binding fragment thereof of the disclosure (for example, ScFv) ; and the host cell comprises the isolated nucleic acid molecule or the vector as described above. In certain embodiments, the isolated nucleic acid molecule encodes a chimeric antigen receptor comprising an antigen-binding fragment (for example, ScFv) of the antibody of the disclosure. In certain embodiments, the host cell is an immune cell, for example, a T cell. In certain embodiments, the host cell is a chimeric antigen receptor T cell (CAR-T) .
[0132] In certain embodiments, the pharmaceutical composition can further comprise an additional pharmaceutically active agent. In certain embodiments, the additional pharmaceutically active agent is a drug with an anti-tumor activity. In certain embodiments, the additional pharmaceutically active agent is selected from: CDH3 inhibitors, TROP2 inhibitors, B7H3 inhibitors, PTK7 inhibitors, PD-1 inhibitors, PD-L1 inhibitors, EGFR inhibitors, HER2 inhibitors, HER3 inhibitors, HER4 inhibitors, IGFR-1 inhibitors, mTOR inhibitors, PI3 kinase inhibitors, c-met or VEGF inhibitors, and chemotherapeutic drugs, or any combination thereof. In certain embodiments, the antibody or the antigen-binding fragment thereof of the disclosure and the additional pharmaceutically active agent are provided as separate components or as mixed components. Therefore, the antibody or the antigen-binding fragment thereof and the additional pharmaceutically active agent can be administered simultaneously, separately, or sequentially.
[0133] In certain embodiments, the antibody or the antigen-binding fragment thereof, the nucleic acid molecule, the vector, the host cell, the conjugate, the multispecific antibody or the chimeric antigen receptor or the host cell expressing the chimeric antigen receptor in the pharmaceutical composition of the disclosure is sufficient (for example, in the subject) to: (a) inhibit proliferation of a cell (for example, a tumor cell) ; (b) inhibit tumor growth; (c) inhibit CDH3-mediated signaling; (d) induce CDH3 internalization; (e) treat a CDH3-mediated disease / condition; or (f) any combination of (a) - (e) .
[0134] In certain embodiments, the CDH3-mediated disease / condition is a tumor, for example, a tumor expressing CDH3. In certain embodiments, the tumor is selected from colorectal cancer, gastric cancer, lung cancer, cervical cancer, pancreatic cancer, esophageal cancer, ovarian cancer, thyroid cancer, bladder cancer, endometrial cancer, breast cancer, liver cancer, prostate cancer, skin cancer, and bile duct cancer, or any combination thereof. In certain embodiments, the tumor is selected from lung cancer, breast cancer, pancreatic cancer and skin cancer.
[0135] Another aspect of the disclosure provides use of the antibody or the antigen-binding fragment thereof, the nucleic acid molecule, the vector, the host cell, the conjugate, the multispecific antibody, the chimeric antigen receptor or the host cell expressing the chimeric antigen receptor or the pharmaceutical composition of the disclosure in the preparation of a medicament for the treatment and / or adjuvant treatment of a tumor.
[0136] Another aspect of the disclosure provides a method for inhibiting proliferation of a cell, comprising contacting the cell with the antibody or the antigen-binding fragment thereof, the nucleic acid molecule, the vector, the host cell, the conjugate, the multispecific antibody, the chimeric antigen receptor or the host cell expressing the chimeric antigen receptor or the pharmaceutical composition of the disclosure. In certain embodiments, the cell is a cell expressing CDH3, for example, a tumor cell. In certain embodiments, the method is implemented in vitro.
[0137] Another aspect of the disclosure provides a method for the treatment and / or adjuvant treatment of a tumor in a subject, comprising: administering to a subject in need thereof an effective amount of the antibody or the antigen-binding fragment thereof, the nucleic acid molecule, the vector, the host cell, the conjugate, the multispecific antibody, the chimeric antigen receptor or the host cell expressing the chimeric antigen receptor or the pharmaceutical composition of the disclosure.
[0138] In certain embodiments, the method further comprises administering a second therapy to the subject, wherein the second therapy is selected from surgery, chemotherapy, radiotherapy, immunotherapy, gene therapy, DNA therapy, RNA therapy, nano therapy, viral therapy, and adjuvant therapy, and any combination thereof. In certain embodiments, the second therapy may be applied with the above method simultaneously, separately, or sequentially.
[0139] In any embodiment above, the tumor involved in the antibody or the antigen-binding fragment thereof, the nucleic acid molecule, the vector, the host cell, the conjugate, the multispecific antibody, the chimeric antigen receptor or the host cell expressing the chimeric antigen receptor or the pharmaceutical composition of the disclosure can be any tumor type. In certain embodiments, the tumor involved in the antibody or the antigen-binding fragment thereof, the nucleic acid molecule, the vector, the host cell, the conjugate, the multispecific antibody, the chimeric antigen receptor or the host cell expressing the chimeric antigen receptor or the pharmaceutical composition of the disclosure is a CDH3-positive tumor. In certain embodiments, the tumor involved in the antibody or the antigen-binding fragment thereof, the nucleic acid molecule, the vector, the host cell, the conjugate, the multispecific antibody, the chimeric antigen receptor or the host cell expressing the chimeric antigen receptor or the pharmaceutical composition of the disclosure is selected from colorectal cancer, gastric cancer, lung cancer, cervical cancer, pancreatic cancer, esophageal cancer, ovarian cancer, thyroid cancer, bladder cancer, endometrial cancer, breast cancer, liver cancer, prostate cancer, skin cancer, and bile duct cancer, or any combination thereof. In certain embodiments, the tumor is selected from lung cancer, breast cancer, pancreatic cancer and skin cancer.
[0140] The antibody or the antigen-binding fragment thereof of the disclosure and the pharmaceutical composition of the disclosure can be formulated into any dosage form known in the medical field, for example, tablets, pills, suspensions, emulsions, solutions, gels, capsules, powder, granules, elixirs, lozenges, suppositories, injections (comprising injection solutions, sterile powder for injection and concentrated solutions for injection) , inhalants, sprays, etc. The preferred dosage form depends on the intended administration method and therapeutic use. The pharmaceutical composition of the disclosure should be sterile and stable under production and storage conditions. One preferred dosage form is an injection. Such injections can be sterile injection solutions. For example, sterile injection solutions can be prepared by the following method: incorporating a necessary dose of the antibody of the disclosure into an appropriate solvent, and optionally, simultaneously incorporating other desired ingredients (including but not limited to pH regulators, surfactants, adjuvants, ionic strength enhancers, isotonic agents, preservatives, diluents or any combination thereof) , followed by filtration and sterilization. In addition, sterile injectable solutions can be prepared as sterile lyophilized powder (for example, by vacuum drying or freeze drying) for convenient storage and use. Such sterile lyophilized powder can be dispersed in a suitable carrier, for example, sterile pyrogen-free water, before use.
[0141] In addition, the antibody or the antigen-binding fragment thereof of the disclosure may be present in a pharmaceutical composition in a unit dose form for convenient administration.
[0142] The antibody or the antigen-binding fragment thereof and the pharmaceutical composition of the disclosure may be administered by any suitable method known in the art, including, but not limited to, oral, buccal, sublingual, ocular, topical, parenteral, rectal, intrathecal, intracytoplasmic, inguinal, intravesical, topical (for example, powder, ointments or drops) or nasal routes. However, for many therapeutic uses, the preferred administration route / mode is parenteral administration (for example, intravenous injection, subcutaneous injection, intraperitoneal injection, intramuscular injection) . The skilled person will appreciate that the administration route and / or mode will vary according to the intended purpose. In one preferred embodiment, the antibody or the antigen-binding fragment thereof and the pharmaceutical compositions of the disclosure are dosed by intravenous infusion or injection.
[0143] The pharmaceutical composition of the disclosure may comprise a "therapeutically effective amount" of the antibody or the antigen-binding fragment thereof of the disclosure. "Therapeutically effective amount" refers to an amount sufficient to cure or at least partially prevent a disease and complications thereof in a patient having the disease. The therapeutic effective amount of the antibody or the antigen-binding fragment thereof may vary according to the following factors: the severity of the disease to be treated; the general state of the patient's own immune system; the general conditions of the patient, for example, the age, weight and sex; the administration method of the drug; and other treatments administered simultaneously, etc.
[0144] In the disclosure, the administration scheme can be adjusted to obtain an optimal purpose response (for example, therapeutic response) . For example, a single dose may be administered, multiple doses may be administered over a period of time, or the dose may be reduced or increased proportionally with the emergency degree of the treatment situation.
[0145] In the disclosure, the subject can be mammals, for example, human. Detection applications
[0146] The antibody or the antigen-binding fragment of the disclosure is capable of specifically binding to CDH3, so that it can be used to detect the presence or level of CDH3 in a sample.
[0147] Therefore, in another respect, the disclosure provides a kit, comprising the antibody or the antigenic binding fragment of the disclosure. In certain embodiments, the antibody or the antigen-binding fragment thereof of the disclosure has the detectable label. In one preferred embodiment, the kit further comprises a second antibody that specifically recognizes the antibody or the antigen-binding fragment thereof of the disclosure. In particular embodiments, the second antibody further comprises the detectable label.
[0148] In the disclosure, the detectable label can be any substance detectable by fluorescent, spectroscopic, photochemical, biochemical, immunological, electrical, optical or chemical means. Such labels are suitable for use in immunological detection (for example, enzyme-linked immunosorbent assay, radioimmunoassay, fluorescent immunoassay, chemiluminescent immunoassay, etc. ) . Such labels are well known in the art, and include, but are not limited to, enzymes (for example, horseradish peroxidase, alkaline phosphatase, β-galactosidase, urease, glucose oxidase, etc. ) , radionuclides (for example, 3H, 125I, 35S, 14C or 32P) , fluorescent dyes (for example, fluorescein isothiocyanate (FITC) , fluorescein, tetramethylrhodamine isothiocyanate (TRITC) , phycoerythrin (PE) , Texas Red, rhodamine, quantum dots or cyanine dye derivatives (for example, Cy7, Alexa 750) ) , acridinium ester compounds, magnetic beads (for example, ) , calorimetric labels, for example, colloidal gold or colored glass or plastic (for example, polystyrene, polypropylene, latex, etc. ) beads, and biotin for binding to avidin (for example, streptavidin) modified with the above labels. In certain embodiments, the detectable labels as described above can be attached to the antibody of the disclosure by the linkers of different lengths to reduce potential steric hindrance.
[0149] In another aspect, the disclosure provides a method for detecting the presence or level of CDH3 in a sample, comprising the step of using the antibody or the antigen-binding fragment thereof of the disclosure. In one preferred embodiment, the antibody or the antigen-binding fragment thereof of the disclosure has the detectable label. In another preferred embodiment, the method further comprises detecting the antibody or the antigen-binding fragment thereof of the disclosure by using a reagent with the detectable label. The method can be used for diagnostic purposes or non-diagnostic purposes (for example, the sample is a cell sample rather than a sample from a patient) .
[0150] In certain embodiments, the method comprises: contacting the sample with the antibody or the antigen-binding fragment thereof of the disclosure under the condition of allowing the formation of a complex between the antibody or the antigen-binding fragment thereof and CDH3; and detecting the formation of the complex.
[0151] In consideration of the low or no expression of CDH3 in normal tissues and the expression or high expression in some cancers, tumors can be diagnosed by detecting the presence or level of CDH3 in a sample. Therefore, in certain embodiments, the method is used for diagnosing a tumor, for example, a CDH3-positive tumor, for example, colorectal cancer, gastric cancer, lung cancer, cervical cancer, pancreatic cancer, esophageal cancer, ovarian cancer, thyroid cancer, bladder cancer, endometrial cancer, breast cancer, liver cancer, prostate cancer, skin cancer, or bile duct cancer, or any combination thereof.
[0152] In certain embodiments, the method comprises: detecting an expression level of CDH3 in a sample to be tested from a subject, and comparing the expression level with a reference value (for example, a health control) , wherein an increase in the expression level compared to the reference value is an indication of a tumor.
[0153] In another aspect, provided is use of the antibody or the antigen-binding fragment thereof of the disclosure in the preparation of a kit, wherein the kit is used for detecting the presence or level of CDH3 in a sample and / or diagnosing a tumor.
[0154] In another aspect, the disclosure provides a diagnostic or therapeutic kit, comprising the antibody or the antigen-binding fragment thereof, the nucleic acid molecule, the vector, the host cell, the conjugate, or the multispecific antibody of the disclosure. Optionally, the diagnostic or therapeutic kit may further comprise instructions for use. The kit, such as a therapeutic kit, may further comprise a drug delivery device for topical administration. The drug delivery device comprises a drug-loaded syringe or a needle-free device.
[0155] The antibody of the disclosure has a high binding affinity and strong specificity to CDH3. After binding to the cells expressing CDH3, the antibody can induce efficient endocytosis, carry toxin proteins and efficiently kill tumor cells. Moreover, the antibody has good physical and chemical properties and stability, and may have advantages such as better quality and in-vivo metabolic properties as well as the applicability for conjugation. Therefore, the antibody of the disclosure has the potential to be used for the treatment and / or adjuvant treatment of tumors. In addition, the antibody of the disclosure is a humanized antibody, and when administered to human subjects, it has low risk of inducing immunogenic reactions and high safety. Therefore, the antibody of the disclosure has a great clinical value. Kits
[0156] Also provided are kits comprising one or more antibodies described herein, or pharmaceutical compositions or conjugates thereof. In a specific embodiment, provided herein is a pharmaceutical pack or kit comprising one or more containers filled with one or more of the ingredients of the pharmaceutical compositions described herein, such as one or more antibodies provided herein. In certain embodiments, the kits contain a pharmaceutical composition described herein and any prophylactic or therapeutic agent, such as those described herein. In certain embodiments, the kits may contain a T cell mitogen, such as, e.g., phytohaemagglutinin (PHA) and / or phorbol myristate acetate (PMA) , or a TCR complex stimulating antibody, such as an anti-CD3 antibody and anti-CD28 antibody. Optionally associated with such container (s) can be a notice in the form prescribed by a governmental agency regulating the manufacture, use or sale of pharmaceuticals or biological products, which notice reflects approval by the agency of manufacture, use or sale for human administration.
[0157] Also provided are kits that can be used in the above methods. In certain embodiments, a kit comprises an antibody described herein, in particular embodiments, the purified antibody is in one or more containers. In a specific embodiment, kits described herein contain a substantially isolated CDH3 antigen as a control. In another specific embodiment, the kits described herein further comprise a control antibody which does not react with CDH3 antigen. In another specific embodiment, kits described herein contain one or more elements for detecting the binding of an antibody to a CDH3 antigen (e.g., the antibody can be conjugated to a detectable substrate such as a fluorescent compound, an enzymatic substrate, a radioactive compound or a luminescent compound, or a second antibody which recognizes the first antibody can be conjugated to a detectable substrate) . In specific embodiments, a kit provided herein can include a recombinantly produced or chemically synthesized CDH3 antigen. The antigen provided in the kit can also be attached to a solid support. In a more specific embodiment, the detecting means of the above-described kit includes a solid support to which a CDH3 antigen is attached. Such a kit can also include a non-attached reporter-labeled anti-human antibody or anti-mouse / rat antibody. In this embodiment, binding of the antibody to the antigen can be detected by binding of the said reporter-labeled antibody. In certain embodiments, the present disclosure relates to the use of a kit of the present disclosure for in vitro assaying and / or detecting CDH3 antigen in a biological sample. Abbreviations CDR Complementarity determining region in immunoglobulin variable region FR Antibody framework region: amino acid residue other than CDR residue in antibody variable region VH Antibody heavy chain variable region VL Antibody light chain variable region IgG Immunoglobulin G IMGT Numbering system based on the international ImMunoGeneTics information (IMGT) initiated by Lefranc et al., see Lefranc et al., Dev. Comparat. Immunol. 27: 55-77, 2003. Kabat Immunoglobulin aligning and numbering system proposed by Elvin A. Kabat (see, for example, Kabat et al., Sequences of Proteins of Immunological Interest, 5th Ed. Public Health Service, National Institutes of Health, Bethesda, Md., 1991) . Chothia Immunoglobulin numbering system proposed by Chothia et al., which is a classical rule for identifying a CDR region boundary based on a position of a structural loop region (see, for example, Chothia &Lesk (1987) J. Mol. Biol. 196: 901-917; Chothia et al. (1989) Nature 342: 878-883) . AbM The AbM CDR definition method is derived from the related research of Martin (Martin ACR, Cheetham JC, Rees AR (1989) Modelling antibody hypervariable loops: A combined algorithm. Proc Natl Acad Sci USA 86: 9268–9272) . Contact The Contact CDR definition method is derived from the related research of Robert M. MacCallum et al. (R M MacCallum, A C Martin, J M Thornton (1996) . Antibody-antigen interactions: contact analysis and binding site topography. Journal of Molecular Biology, 262 (5) , 732-745. ) . mAb Monoclonal antibody EC50 Concentration of producing 50%efficacy or binding IC50 Concentration of producing 50%inhibition ELISA Enzyme-linked immunosorbent assay PCR Polymerase chain reaction HRP Horseradish peroxidase KD Equilibrium dissociation constant Ka Association rate constant Kd Dissociation rate constant ADCC Antibody-dependent cellular cytotoxicity FACS Flow cytometer technology CDR-H1 Complementarity determining region 1 in the immunoglobulin heavy chain variable region CDR-H2 Complementarity determining region 2 in the immunoglobulin heavy chain variable region CDR-H3 Complementarity determining region 3 in the immunoglobulin heavy chain variable region CDR-L1 Complementarity determining region 1 in the immunoglobulin light chain variable region CDR-L2 Complementarity determining region 2 in the immunoglobulin light chain variable region CDR-L3 Complementarity determining region 3 in the immunoglobulin light chain variable region Definitions
[0158] In the present disclosure, unless otherwise indicated, scientific and technical terms used herein shall have the meanings that are commonly understood by those skilled in the art. Furthermore, the operation steps of the cell culture, biochemistry, nucleic acid chemistry, immunology laboratories and the like used herein are all conventional steps widely used in the corresponding fields. Meanwhile, in order to better understand the disclosure, definitions and explanations of relevant terms are provided below.
[0159] As used herein, the term "antibody" is used in the broadest sense and encompasses various antibody structures, including, but not limited to monoclonal antibodies, polyclonal antibodies, multispecific antibodies (for example, bispecific antibodies) , and antibody fragments so long as they exhibit the desired antigen-binding activity. For example, an immunoglobulin molecule may consist of two pairs of polypeptide chains (each pair having a light chain (LC) and a heavy chain (HC) ) . Antibody light chains can be classified as κ (kappa) and λ (lambda) light chains. Heavy chains can be classified as μ, δ, γ, α or ε, and the isotypes of an antibody are defined as IgM, IgD, IgG, IgA, and IgE, respectively. Within the light chain and the heavy chain, a variable region and a constant region are attached by a "J" region of about 12 or more amino acids, and the heavy chain further comprises a "D" region of about 3 or more amino acids. Each heavy chain consists of a heavy chain variable region (VH) and a heavy chain constant region (CH) . The heavy chain constant region consists of 3 domains (CH1, CH2, and CH3) . Each light chain consists of a light chain variable region (VL) and a light chain constant region (CL) . The light chain constant region consists of one domain CL. The constant domain is not directly involved in the binding of the antibody to an antigen, but exhibits a plurality of effector functions, such as mediating the binding of immunoglobulin to a host tissue or factor, comprising various cells (for example, an effector cell) of an immune system and a first component (C1q) of a classical complement system. The VH and VL regions can also be subdivided into regions having hypervariability (referred to as complementarity determining regions (CDRs) ) , interspersed with regions that are more conservative and referred to as framework regions (FR) . Each of VH and VL consists of 3 CDRs and 4 FRs arranged in the following order: FR1, CDR1, FR2, CDR2, FR3, CDR3, FR4 from the amino terminal to the carboxyl terminal. The variable regions (VH and VL) of each heavy chain / light chain pair form antigen-binding sites, respectively. The distribution of amino acids in various regions or domains may follow the definitions of Kabat, Sequences of Proteins of Immunological Interest (National Institutes of Health, Bethesda, Md. (1987 and 1991) ) , or Chothia &Lesk (1987) J. Mol. Biol. 196: 901-917; Chothia et al. (1989) Nature 342: 878-883.
[0160] Herein, unless otherwise indicated clearly in the context, when referring to the term "antibody" , it comprises not only an intact antibody, but also an antigen-binding fragment of the antibody.
[0161] The term "antibody" further comprises the embodiments in which the heavy chain constant region comprises C-terminal lysine or lacks C-terminal lysine or C-terminal glycine-lysine dipeptide. The term further comprises the embodiments in which an N-terminal amino acid of the antibody variable region has been cyclized to pyroglutamate. Thus, in a composition comprising the antibody disclosed herein, each antibody therein may independently comprise C-terminal lysine, lack C-terminal lysine, lack C-terminal glycine-lysine and / or comprise N-terminal glutamine or glutamic acid, or cyclization of the N-terminal amino acid to pyroglutamic acid.
[0162] As used herein, the term "complementarity determining region" or "CDR" refers to the amino acid residues responsible for antigen binding in the antibody variable region. The precise boundaries of these amino acid residues may be defined according to various numbering systems known in the art, for example, according to the AbM numbering system (Martin ACR, Cheetham JC, Rees AR (1989) Modelling antibody hypervariable loops: A combined algorithm. Proc Natl Acad Sci USA 86: 9268 –9272) or the IMGT numbering system (Lefranc et al., Dev. Comparat. Immunol. 27: 55-77, 2003) . For a given antibody, those skilled in the art will easily identify the CDRs defined by each numbering system. Furthermore, the correspondence among different numbering systems is well known to those skilled in the art (for example, see Lefranc et al., Dev. Comparat. Immunol. 27: 55-77, 2003) .
[0163] In the disclosure, the CDRs of the antibody or the antigen-binding fragment thereof of the disclosure can be determined according to various numbering systems known in the art. In certain embodiments, the CDRs of the antibody or the antigen-binding fragment thereof of the disclosure may be determined by the Chothia, AbM, Kabat, Contact or IMGT numbering systems.
[0164] The following general rules (disclosed at www. bioinf. org. uk: Professor Andrew C. R. Martin's research group) can be used to define the CDRs in an antibody sequence, in which the amino acids specifically interacting with the amino acids consisting of antibody-binding antigen epitopes are included. In rare cases, these generally constant features do not appear; but Cys residues are the most conservative features.
[0165] The entire amino acid sequence of the VH is generally numbered according to Kabat, while the three CDRs within the variable region can be defined according to any one of the above numbering systems. In certain embodiments, the amino acid sites in VH may be numbered sequentially from amino acid site 1 until the terminal of the sequence, and may also be numbered according to Kabat. Unless otherwise specified, the amino acid sites in VH and VL described herein are defined according to sequential numbering.
[0166] The numbering of amino acid sites in the heavy chain constant region can be numbered sequentially from amino acid site 1 until the terminal of the sequence, or can be numbered according to Eu. The amino acid sequence of the IgG1 heavy chain constant region has 330 amino acids, numbered sequentially from 1 to 330. The corresponding sequence numbered according to Eu starts from site 118 and terminates at site 447. Unless otherwise specified, the amino acid sites of the heavy chain and the light chain described herein are defined according to sequential numbering.
[0167] As used herein, the term "framework region" or "FR" residues refer to those amino acid residues other than the CDR residues as defined above in the antibody variable region.
[0168] The term "antibody" is not limited to any particular method of producing an antibody. For example, the antibody comprises a recombinant antibody, a monoclonal antibody and a polyclonal antibody. The antibody can be an antibody of a different isotype, for example, an IgG (for example, an IgG1, IgG2, IgG3, or IgG4 subtype) , IgA1, IgA2, IgD, IgE, or IgM antibody.
[0169] As used herein, the term "antigen-binding fragment" of an antibody refers to a molecule other than an intact antibody, which comprises a part of the intact antibody and binds to the antigen to which the intact antibody binds. For example, the antigen-binding fragment can be a polypeptide of a fragment of a full-length antibody, which retains the ability to specifically bind to the same antigen to which the full-length antibody binds and / or competes with the full-length antibody for specific binding to the antigen, and is also referred to as an "antigen-binding moiety" . Generally, see Fundamental Immunology, Ch. 7 (Paul, W., ed., version 2, Raven Press, N. Y. (1989) , which is incorporated by reference herein in its entirety for all purposes. The antigen-binding fragment of the antibody can be produced by a recombinant DNA technology or by enzymatic or chemical cleavage of the intact antibody. Non-limiting examples of the antigen-binding fragment include Fab, Fab', Fab'-SH, F (ab') 2, Fd, Fv, dAb and complementarity determining region (CDR) fragments, single-chain antibodies (for example, scFv) , chimeric antibodies, diabodies, linear antibodies, nanobodies (the technology is from Domantis) , domain antibodies (the technology is from Ablynx) , and such polypeptides that comprise at least a part of an antibody sufficient to confer a specific antigen-binding ability on the polypeptide. Engineering-modified antibody variants are reviewed in Holliger et al., 2005; Nat Biotechnol, 23: 1126-1136.
[0170] As used herein, the term "full-length antibody" means an antibody consisting of two "full-length heavy chains" or "heavy chains" and two "full-length light chains" or "light chains" . wherein the "full-length heavy chain" or "heavy chain" refers to a polypeptide chain consisting of a heavy chain variable region (VH) , a heavy chain constant region CH1 domain, a hinge region (HR) , a heavy chain constant region CH2 domain and a heavy chain constant region CH3 domain in the direction from N-terminal to C-terminal; and furthermore, when the full-length antibody is an IgE isotype, optionally, it further comprises a heavy chain constant region CH4 domain. In particular embodiments, the "full-length heavy chain" is a polypeptide chain consisting of VH, CH1, HR, CH2 and CH3 in the direction from N-terminal to C-terminal. The "full-length light chain" or "light chain" is a polypeptide chain consisting of a light chain variable region (VL) and a light chain constant region (CL) in the direction from N-terminal to C-terminal. Two pairs of full-length antibody chains are attached together by a disulfide bond between CL and CH1 and a disulfide bond between the HRs of the two full-length heavy chains. The full-length antibodies of the disclosure can be from a single species, for example, human; or they can be chimeric antibodies or humanized antibodies. The full-length antibody of the disclosure comprises two antigen-binding sites formed by VH and VL pairs, respectively, and the two antigen-binding sites specifically recognize / bind to the same antigen.
[0171] As used herein, the term "Fab fragment" means an antibody fragment consisting of VL, VH, CL and CH1 domains; the term "F (ab') 2 fragment" means an antibody fragment comprising two Fab fragments attached by a disulfide bridge on a hinge region; the term "Fab'fragment" means the fragment obtained after reducing the disulfide bonds attaching two heavy chain fragments in the F (ab') 2 fragment, which consists of an intact light chain and the Fd fragment (consisting of the VH and CH1 domains) of the heavy chain; and the term "Fab'-SH" refers to the Fab fragment containing free sulfhydryl.
[0172] As used herein, the term "Fv fragment" means an antibody fragment consisting of the VL and VH domains of a single arm of the antibody. An Fv fragment is generally considered to be the minimum antibody fragment which can form an intact antigen-binding site. It is generally believed that six CDRs confer an antigen-binding specificity to the antibody. However, even one single variable region (for example, an Fd fragment, which contains only three CDRs specific to an antigen) can also recognize and bind to an antigen, although probably at a lower affinity than an intact binding site.
[0173] As used herein, the term "Fc" means an antibody fragment formed by binding second and third constant regions of a first heavy chain of an antibody to second and third constant regions of a second heavy chain via disulfide bonds. An Fc fragment of an antibody has a plurality of different functions, but is not involved in antigen binding.
[0174] As used herein, the term "scFv" refers to a single polypeptide chain comprising VL and VH domains, wherein the VL and VH are attached by a linker (see, for example, Bird et al., Science 242: 423-426 (1988) ; Huston et al., Proc. Natl. Acad. Sci. USA 85: 5879-5883 (1988) ; and Pluckthun, The Pharmacology of Monoclonal Antibodies, vol. 113, Roseburg and Moore eds., Springer-Verlag, New York, pp. 269-315 (1994) ) . Such scFv molecules may have the general structure: NH2-VL-linker-VH-COOH or NH2-VH-linker-VL-COOH. Suitable linkers in the prior art consist of repeated GGGGS amino acid sequences or variants thereof. For example, a linker having an amino acid sequence (GGGGS) 4 may be used, but variants thereof may also be used (Holliger et al. (1993) , Proc. Natl. Acad. Sci. USA 90: 6444-6448) . Other linkers that may be used in the disclosure are described by Alfthan et al. (1995) , Protein Eng. 8: 725-731, Choi et al. (2001) , Eur. J. Immunol. 31: 94-106, Hu et al. (1996) , Cancer Res. 56: 3055-3061, Kipriyanov et al. (1999) , J. Mol. Biol. 293: 41-56 and Roovers et al. (2001) , Cancer Immunol. In some cases, there may also be a disulfide bond between the VH and VL of the scFv.
[0175] As used herein, the term "diabody" means that the VH and VL domains thereof are expressed on a single polypeptide chain, but a linker used is too short to allow pairing between the two domains of the same chain, thereby forcing the domains to pair with the complementary domains of another chain and generate two antigen-binding sites (see, for example, Holliger P. et al., Proc. Natl. Acad. Sci. USA 90: 6444-6448 (1993) , and Poljak R. J. et al., Structure 2: 1121-1123 (1994)) .
[0176] Each of the above antibody fragments retains the ability to specifically bind to the same antigen to which a full-length antibody binds, and / or competes with the full-length antibody for specific binding to the antigen. Herein, those skilled in the art can obtain an antigen-binding fragment of an antibody (for example, the above antibody fragment) from a given antibody (for example, the antibody provided by the disclosure) by using known conventional technologies, and screen the antigen-binding fragment of the antibody for specificity in the same manner as that for the intact antibody.
[0177] As used herein, the term "multispecific antibody" refers to an antibody with multiple different antigen-binding specificities, comprising, for example, a bispecific antibody, a trispecific antibody, and a tetraspecific antibody. "Bispecific antibody" refers to an antibody with two different antigen-binding specificities, which is a conjugate formed by a first antibody (or a fragment thereof) and a second antibody (or a fragment thereof) or an antibody analog through a conjugation arm, and the conjugation method includes, but is not limited to, a chemical reaction, a gene fusion and an enzymatic process. "Multispecific antibody" comprises, for example, a trispecific antibody and a tetraspecific antibody, wherein the trispecific antibody is an antibody with three different antigen-binding specificities, and the tetraspecific antibody is an antibody with four different antigen-binding specificities.
[0178] As used herein, the terms "monoclonal antibody" , "McAb" and "mAb" have the same meaning and are used interchangeably, which refer to an antibody or a fragment of the antibody from a group of highly homologous antibody molecules, that is, a group of identical antibody molecules except for natural mutations that may occur spontaneously. The monoclonal antibody has a high specificity for a single epitope on an antigen. The polyclonal antibody is relative to the monoclonal antibody, and usually comprises at least 2 or more different antibodies, and these different antibodies usually recognize different epitopes on an antigen. In addition, the modifier "monoclonal" only indicates that the antibody is characterized by being obtained from a highly homogeneous antibody group, and should not be understood as the need of preparing the antibody by any specific method.
[0179] As used herein, the term "chimeric antibody" refers to an antibody in which a part of the light chain or / and heavy chain is derived from one antibody (which may be derived from a specific species or belong to a specific antibody class or subclass) , and the other part of the light chain or / and heavy chain is derived from another antibody (which may be derived from the same or different species or belong to the same or different antibody classes or subclasses) , but in any case, the antibody still retains the binding activity to the target antigen. For example, the term "chimeric antibody" may comprise an antibody in which the heavy chain and light chain variable regions are derived from a first antibody (for example, a murine antibody) , while the heavy chain and light chain constant regions are derived from a second antibody (for example, a human antibody) .
[0180] As used herein, the term "humanized antibody" refers to an antibody which can be prepared by replacing a part of a human antibody with a part of a non-human antibody prepared by immunizing mammals other than humans. Typically, all or a part of a CDR region of a humanized antibody is from a non-human antibody (adonor antibody) , and all or a part of a non-CDR region (for example, a variable region FR and / or a constant region) is from human immunoglobulin (areceptor antibody) . For example, a humanized antibody can be prepared by transplanting a CDR sequence derived from the germline of another mammalian species onto a human framework sequence.
[0181] As used herein, the term "variant" , in the context of a polypeptide (comprising a polypeptide) , also refers to a polypeptide or a peptide comprising an amino acid sequence that has been altered by the introduction of an amino acid residue substitution, deletion or addition. In certain cases, the term "variant" also refers to a polypeptide or a peptide that has been modified (i.e., by covalently linking any type of molecules to the polypeptide or the peptide) . For example, but without limitation, the polypeptide can be modified, for example, by glycosylation, acetylation, pegylation, phosphorylation, amidation, derivatization by known protecting / blocking groups, proteolytic cleavage, attachment to cellular ligands or other proteins, etc. The technology known to those skilled in the art, including, but not limited to specific chemical cleavage, acetylation, formylation, metabolic synthesis of tunicamycin, etc. can be used to produce the derived polypeptides or peptides by chemical modification. In addition, the variant has similar, same or improved functions of the polypeptide or peptide from which it is derived.
[0182] As used herein, the term "specifically binding" refers to a non-random binding reaction between two molecules, such as a reaction between an antibody and an antigen to which it is directed. The strength or affinity of a specific binding interaction can be expressed as an equilibrium dissociation constant (KD) or a half-maximal effect concentration (EC50) of the interaction.
[0183] The specific binding properties between the two molecules can be determined by using the method known in the art. One method involves the measurement of the speed at which antigen-binding sites / antigen complexes are formed and dissociated. Both the "association rate constant" (ka or kon) and the "dissociation rate constant" (kdis or koff) can be calculated from the concentration and the actual rate of association and dissociation (see Malmqvist M, Nature, 1993, 361: 186-187) . The ratio of kdis / kon is equal to the dissociation constant KD (see Davies et al., Annual Rev Biochem, 1990; 59: 439-473) . KD, kon and kdis values can be measured by any effective method. In certain embodiments, the dissociation constant can be measured by using bioluminescence interferometry (for example, a ForteBio Octet method) . Besides, a surface plasmon resonance technology (for example, ) or kinetic exclusion assay (KinExA) can also be used for measuring the dissociation constant.
[0184] As used herein, the term "vector" refers to a nucleic acid delivery vehicle into which a polynucleotide can be inserted. When a vector can express the protein encoded by the inserted polynucleotide, the vector is called an expression vector. A vector can be introduced into a host cell by transformation, transduction or transfection, so that the genetic material elements carried by the vector are expressed in the host cell. Vectors are well known to those skilled in the art, and include but are not limited to: plasmids; phagemids; cosmids; artificial chromosomes, for example, yeast artificial chromosomes (YACs) , bacterial artificial chromosomes (BACs) , or P1-derived artificial chromosomes (PACs) ; and phages, for example, λ phages or M13 phages and animal viruses, etc. Animal viruses that can be used as vectors include, but are not limited to, retroviruses (comprising lentiviruses) , adenoviruses, adeno-associated viruses, herpes viruses (such as herpes simplex viruses) , poxviruses, baculoviruses, papillomaviruses, papovaviruses (such as SV40) . A vector can contain a plurality of elements for controlling expressions, including, but not limited to, a promoter sequence, a transcription initiation sequence, an enhancer sequence, a selection element and a reporter gene. In addition, the vector may also contain a replication origin site.
[0185] Both expression and cloning vectors contain a nucleic acid sequence that enables the vector to replicate in one or more selected host cells. Generally, in a cloning vector, this sequence is one that enables the vector to replicate independent of the host chromosomal DNA, and comprises a replication origin or an autonomously replicating sequence. The term "expression vector" used herein refers to a vector comprising a recombinant polynucleotide, which comprises an expression regulatory sequence that is effectively attached to a nucleotide sequence to be expressed. The expression vector comprises sufficient cis-acting elements for expression; Other elements for expression can be provided by a host cell or an in-vitro expression system. Expression vectors comprise all those known in the art, for example, cosmids, plasmids (for example, those naked or contained in liposomes) and viruses (for example, lentiviruses, retroviruses, adenoviruses and adeno-associated viruses) .
[0186] As used herein, the term "host cell" refers to a cell that can be used for introducing a vector, including, but not limited to, prokaryotic cells such as Escherichia coli or Bacillus subtilis, fungal cells such as yeast cells or Aspergillus, insect cells such as S2 Drosophila cells or Sf9, or animal cells such as fibroblasts, NS0 cells, Vero cells, Hela cells, COS cells, CHO cells (for example, CHO-K1, CHO-S, CHO DXB11, ExpiCHO, CHO DG44 or CHO-EBNA cells) , ExpiCHO cells, HEK293 cells, Expi293 cells, BHK cells and MDCKII cells.
[0187] As used herein, the term "identity" is used for referring to the sequence matching between two polypeptides or between two nucleic acids. When a certain position in two sequences being compared is occupied by the same base or amino acid monomer subunit (for example, a certain position in each of two DNA molecules is occupied by adenine, or a certain position in each of two polypeptides is occupied by lysine) , the molecules are identical at that position. The "percent identity" between two sequences is a function of the number of matching positions shared by two sequences divided by the number of positions being compared x 100. For example, if 6 of 10 positions in two sequences match, the two sequences have 60%identity. For example, the DNA sequences CTGACT and CAGGTT share 50%identity (3 of a total of 6 positions match) . Typically, two sequences are compared when they are aligned to produce the maximum identity. Such an alignment can be implemented by using, for example, the method of Needleman et al. (1970) J. Mol. Biol. 48: 443-453, which can be conveniently performed by a computer program, for example, the Align program (DNAstar, Inc. ) . The percent identity between two amino acid sequences can also be determined by using the algorithm of E. Meyers and W. Miller (Comput. Appl Biosci., 4: 11-17 (1988) ) , which has been incorporated into the ALIGN program (version 2.0) , and using a PAM120 weight residue table, a gap length penalty of 12, and a gap penalty of 4. In addition, the percent identity between two amino acid sequences can be determined by using the Needleman and Wunsch (J MoI Biol. 48: 444-453 (1970) ) algorithm which has been incorporated into the GAP program of the GCG software package (available at www. gcg. com) and using a Blossum 62 matrix or a PAM250 matrix and a gap weight of 16, 14, 12, 10, 8, 6 or 4 and a length weight of 1, 2, 3, 4, 5 or 6.
[0188] As used herein, the term "conservative substitution" means an amino acid substitution that does not adversely affect or alter the desired properties of the protein / polypeptide comprising the amino acid sequence. For example, the conservative substitution can be introduced by standard technologies known in the art, for example, site-directed mutagenesis and PCR-mediated mutagenesis. The conservative amino acid substitution comprises a substitution of an amino acid residue with an amino acid residue having a similar side chain, for example, a substitution with a residue that is physically or functionally similar to the corresponding amino acid residue (for example, having similar sizes, shapes, charges, and chemical properties, including an ability to form a covalent bond or a hydrogen bond, etc. ) . Families of amino acid residues having similar side chains have been defined in the art. These families comprise amino acids with basic side chains (for example, lysine, arginine and histidine) , acidic side chains (for example, aspartic acid and glutamic acid) , uncharged polar side chains (for example, glycine, asparagine, glutamine, serine, threonine, tyrosine, cysteine and tryptophan) , nonpolar side chains (for example, alanine, valine, leucine, isoleucine, proline, phenylalanine and methionine) , β branched side chains (for example, threonine, valine and isoleucine) and aromatic side chains (for example, tyrosine, phenylalanine, tryptophan and histidine) . Thus, in particular embodiments, the corresponding amino acid residue is replaced with another amino acid residue from the same side chain family. Methods for identifying amino acid conservative substitutions are well known in the art (see, for example, Brummell et al., Biochem. 32: 1180-1187 (1993) ; Kobayashi et al. Protein Eng. 12(10) : 879-884 (1999) ; and Burks et al. Proc. Natl Acad. Set USA 94: 412-417 (1997) , which are incorporated herein by reference) .
[0189] The writing of twenty conventional amino acids involved herein follows conventional usage. See, for example, Immunology-A Synthesis (2nd Edition, E. S. Golub and D. R. Gren, Eds., Sinauer Associates, Sunderland, Mass. (1991) ) , which is incorporated herein by reference. In the disclosure, the terms "polypeptide" and "protein" have the same meaning and are used interchangeably. Also, in the disclosure, amino acids are generally represented by single-letter and three-letter abbreviations known in the art. For example, alanine can be represented by A or Ala.
[0190] As used herein, the term "pharmaceutically acceptable carrier and / or excipient" refers to a carrier and / or excipient that is pharmacologically and / or physiologically compatible with a subject and an active ingredient, which is well known in the art (see, for example, Remington's Pharmaceutical Sciences. Edited by Gennaro AR, 19th ed. Pennsylvania: Mack Publishing Company, 1995) , and includes but is not limited to: pH regulators, surfactants, adjuvants, ionic strength enhancers, diluents, agents for maintaining osmotic pressure, agents for delaying absorption and preservatives. For example, pH regulators include, but are not limited to, phosphate buffers. Surfactants include, but are not limited to, cationic, anionic or non-ionic surfactants, for example, Tween-80. Ionic strength enhancers include, but are not limited to, sodium chloride. Preservatives include, but are not limited to, various antibacterial and antifungal agents, for example, parabens, chlorobutanol, phenol, sorbic acid, etc. Reagents that maintain osmotic pressure include, but are not limited to, sugars, NaCl and analogues thereof. Reagents that delay absorption include, but are not limited to, monostearate and gelatin. Diluents include, but are not limited to, water, aqueous buffer solutions (such as buffered saline) , alcohols and polyols (such as glycerol) , etc. Stabilizers, which have the meaning commonly understood by those skilled in the art, can stabilize the desired activity of the active ingredients in the drug, and include, but are not limited to, sodium glutamate, gelatin, SPGA, sugars (such as sorbitol, mannitol, starch, sucrose, lactose, dextran, or glucose) , amino acids (such as glutamic acid, glycine) , proteins (such as dried whey, albumin or casein) or degradation products thereof (such as lactalbumin hydrolysate) , etc.
[0191] As used herein, the term "prevention" refers to a method implemented to prevent or delay the occurrence of a disease or condition or symptom (for example, a tumor) in a subject. As used herein, the term "treatment" refers to a method performed to obtain beneficial or desired clinical results. For the purposes of the disclosure, beneficial or desired clinical results include, but are not limited to, alleviating symptoms, reducing the extent of a disease, stabilizing (i.e., no longer worsening) the state of a disease, delaying or slowing down the progression of a disease, improving or alleviating the state of a disease, and relieving symptoms (whether partially or completely) , whether detectable or undetectable. In addition, "treatment" may also refer to an extension of survival time compared to the expected survival time (if treatment is not received) .
[0192] As used herein, the term "subject" refers to mammals, for example, primate mammals, for example, human. In certain embodiments, the subject (for example, human) has a tumor, or is at risk of suffering from the above-mentioned disease.
[0193] As used herein, the term "effective amount" refers to an amount sufficient to obtain or at least partially obtain the desired effect. For example, an effective amount for preventing a disease (for example, a tumor) refers to an amount sufficient to prevent, restrain or delay the occurrence of the disease (for example, the tumor) . An effective amount for treating a disease refers to an amount sufficient to cure or at least partially restrain the disease and complications thereof in a patient having the disease. Determining such an effective amount is completely within the capability of those skilled in the art. For example, the amount effective for the therapeutic use will depend on: the severity of the disease to be treated; the general state of the patient's own immune system; the general conditions of the patient, for example, the age, weight and sex; the administration method of the drug; and other treatments administered simultaneously, etc.
[0194] As used herein, the term "effector function" refers to those biological activities attributable to the Fc region (anative sequence Fc region or an amino acid sequence variant Fc region) of an antibody, and varies with the antibody isotype. Examples of antibody effector functions include, but are not limited to: Fc receptor binding affinity, antibody-dependent cell-mediated cytotoxicity (ADCC) , complement-dependent cytotoxicity (CDC) , antibody-dependent cellular phagocytosis (ADCP) , downregulation of cell surface receptors (for example, B cell receptors) , B cell activation, cytokine secretion, half-life / clearance rate of antibodies and antigen-antibody complexes, etc. Methods for altering the effector functions of antibodies are known in the art, for example, by introducing mutations in the Fc region.
[0195] As used herein, the term "antibody-dependent cell-mediated cytotoxicity (ADCC) " refers to a form of cytotoxicity in which Ig, by binding to Fc receptors (FcRs) present on cytotoxic cells (for example, natural killer (NK) cells, neutrophils and macrophages) , enables these cytotoxic effector cells to specifically bind to an antigen-bearing target cell and subsequently kill the target cell by secreting cytotoxins.
[0196] As used herein, the term "complement-dependent cytotoxicity (CDC) " refers to the cytotoxic effect of a complement involved, that is, a classical complement pathway is activated by the binding of a specific antibody to the corresponding antigen on the cell membrane surface to form a complex, and the formed attacking membrane complex exerts a lytic effect on the target cell.
[0197] As used herein, the term "antibody-dependent cellular phagocytosis (ADCP) " refers to a form of cytotoxicity in which the Fab segment of an antibody drug can target a marker on the tumor cell surface, and the Fc segment can bind to Fc receptors on phagocytes (such as macrophages, monocytes and neutrophils) , thereby prompting the phagocytes to phagocytose cancer cells in vivo.
[0198] Herein, "combination" comprises therapies that can be administered separately, for example, therapies separately formulated for separate administration (for example, can be provided in a kit) , and therapies that can be administered together in a single formulation (i.e., "co-formulation" ) . In certain embodiments, the anti-CDH3 antibody or the antigen-binding fragment thereof of the disclosure can be administered sequentially. In certain embodiments, the anti-CDH3 antibody or the antigen-binding fragment thereof can be administered simultaneously. The anti-antibody or the antigen-binding fragment thereof can be used in combination with at least one other (active) agent in any manner.
[0199] In such combination therapies, various active agents often have different complementary action mechanisms, and the combination therapies may lead to a synergistic effect. The combination therapies comprise therapeutic agents that affect the immune response (for example, enhance or activate the response) and therapeutic agents that affect (for example, inhibit or kill) tumor / cancer cells. The combination therapies can reduce the likelihood of the occurrence of drug-resistant cancer cells. The combination therapies may allow for a reduction in the dosage of one or more of the agents to reduce or eliminate adverse effects associated with one or more of the agents. Such combination therapies may have a synergistic therapeutic or preventive effect on the underlying disease, condition or disorder.
[0200] Herein, CDH3 positivity is obtained by immunohistochemistry and staining intensity evaluation performed by a professional clinical pathologist.
[0201] The terms "cancer" and "tumor" are used interchangeably and refer to a large class of diseases characterized by the uncontrolled growth of abnormal cells in vivo. Uncontrolled cell division may lead to the formation of malignant tumors or cells that invade adjacent tissues and may metastasize to distant parts of the body by the lymphatic system or bloodstream. Cancers comprise benign and malignant cancers as well as dormant tumors or micrometastases. Cancers also comprise hematological malignancies.
[0202] The embodiments of the disclosure will be described in detail below in conjunction with the examples, but those skilled in the art will understand that the following examples are only used for illustrating the disclosure and are not intended to limit the scope of the disclosure. According to the drawings and the following detailed description of the preferred embodiments, various objects and advantages of the disclosure will become implementable to those skilled in the art. Sequence information
[0203] The information on the sequences involved in the present disclosure is described in the following table: Table 1: Sequence description
[0204] The invention will now be described with reference to the following examples, which are intended to illustrate the invention, but not to limit it.
[0205] Unless otherwise specified, the molecular biology experiment method and immunoassay method used in the present disclosure are performed basically according to the methods described in J. Sambrook et al., Molecular Cloning: Laboratory Manual, 2nd ed., Cold Spring Harbor Laboratory Press, 1989, and F.M. Ausubel et al., A Laboratory Guide to Molecular Biology, 3rd Edition, John Wiley &Sons, Inc., 1995; and restriction enzymes were used in accordance with product manufacturer's recommendations. Those skilled in the art understand that the examples describe the present disclosure by way of example and are not intended to limit the scope of the claimed invention. EXAMPLES Example 1: Preparation of anti-human CDH3 monoclonal antibodies 1.1 Immunization of mice
[0206] The extracellular sequences of human CDH3 (NP_001304124.1) , monkey CDH3 (XP_005592414.1) , rat CDH3 (XP_006255621.1) and mouse CDH3 (NP_001032898.1) , each with a 6×His tag added to C-terminal, were optimized, synthesized, and constructed onto a pcDNA3.4 expression vector; and the recombinant plasmid was extracted, and was transfected, expressed and purified to obtain human, monkey, rat and mouse CDH3 proteins after being sequenced to be free of errors. The human CDH3 full-length gene was used to construct the BaF3 (a murine interleukin-3 dependent pro-B cell line, Signosis Inc., Santa Clara, CA, Cat#EL-001) overexpression cell BaF3-hCDH3. Wild-type mice were immunized with human CDH3 proteins, and Freund's complete adjuvant and Freund's incomplete adjuvant were used for immunization, respectively. The serum titer of an anti-CDH3 antibody was monitored by BaF3 overexpression cell flow cytometry. According to the serum titer, the best mice were selected for hybridoma fusion.
[0207] Positive control antibody (PCA062 mAb) was prepared using the NOV169N31Q antibody disclosed in WO2016203432A1.
[0208] To prepare a negative control antibody, variable regions of an anti-trinitrobenzene antibody (1B7.11 from American Type Culture Collection, Manassas, VA) and a mouse anti-chicken lysozyme antibody HyHEL-10 (see, Smith-Gill, S.J., Mainhart, C., Lavoie, T.B., Feldman, R.J., Drohan, . W. &Brooks, B. R. (1987) J. Mol. Biol. 194, 713-724) were fused with a human IgG1 heavy chain constant region comprising the amino acid sequence set forth in SEQ ID NO: 121 and a human Kappa light chain constant region as set forth in SEQ ID NO: 123, respectively, and the expressed and purified antibody was named hIgG1-TNP and hIgG1. The variable region of the mouse anti-chicken lysozyme antibody HyHEL-10 was fused with a human IgG1 heavy chain constant region mutant comprising the amino acid sequence set forth in SEQ ID NO: 122 and a human Kappa light chain constant region comprising the amino acid sequence set forth in SEQ ID NO: 123, and the expressed and purified antibody was named hIgG1-M. 1.2 Hybridoma fusion screening
[0209] After hybridoma fusion, BaF3-hCDH3 cell flow cytometry was used for supernatant screening to initially screen a positive clone supernatant, and then ELISA was used to detect the clones positive for binding to rat CDH3 proteins and not binding to blank BaF3 cell, for further verification. Candidate clones were expanded to a 24-well plate and subcloned, and then monoclonals were screened by using BaF3-hCDH3 and blank BaF3 cells; and the clones positive for binding to BaF3-hCDH3 cells and not binding to blank BaF3 cells were selected for amplification and culture. Example 2: Evaluation of anti-human CDH3 murine antibodies and chimeric antibodies 2.1 Evaluation of binding activity of anti-human CDH3 murine antibodies
[0210] All preferred monoclonals were amplified for serum-free culture, and a supernatant is subject to affinity purification using Protein-A resin (MabSelect SuReTM, Cytiva, Marlborough, MA) , to obtain CDH3 murine antibodies Ab-B, Ab-C, Ab-D, and Ab-A after quantification, for candidate evaluation.
[0211] Assay of the binding of CDH3 murine antibodies to cells: BaF3 cells, BaF3-hCDH3 cells, NCI-H358 cells and HCC1954 cells were used to detect the binding activity of the purified murine monoclonal antibodies. Murine monoclonal antibodies Ab-B, Ab-C, Ab-D and Ab-A as well as negative control hIgG1-TNP were diluted, respectively, and then incubated with cells, followed by an addition of a fluorescent secondary antibody for incubation; and the unbound secondary antibody was removed by washing, and the fluorescence signals were detected by flow cytometry. The raw data was imported into the software for nonlinear curve fitting, and the EC50 for the binding of each antibody to each cell was calculated. As shown in Table 2-1, Table 2-2, Table 2-3, and FIGS. 1A-1B, the screened antibodies Ab-B, Ab-C, Ab-D and Ab-A all have high affinity and high specificity binding to the cells overexpressing human CDH3 or human tumor cells. Table 2-1 Detection of the binding of murine antibodies to cells Table 2-2 Detection of the binding of murine antibodies to cells Table 2-3 Detection of the binding of murine antibodies to cells
[0212] Detection of binding specificity of CDH3 murine antibodies: human CDH1 and CDH2 have 55.7%and 44.7%similarity to CDH3 extracellular region amino acid sequences, respectively; and the human CDH1 (uniprot: P12830) and CDH2 (uniprot: P19022) extracellular region proteins were expressed and purified to detect the binding specificity of the murine antibodies. The results showed that Ab-B, Ab-C, Ab-D, Ab-A and the control PCA062 mAb antibody did not bind to CDH1 and CDH2 proteins. A549 cells (ATCC) were negative cells that did not express human CDH3; and flow cytometry was used to detect the binding ability of a mouse monoclonal antibody. The results showed that all the mouse monoclonal antibodies Ab-B, Ab-C, Ab-D and Ab-A and the control antibody PCA062 mAb did not bind to A549 cells. The above results showed that the above candidate mouse monoclonal antibodies were the antibodies that were specifically bound to human CDH3 and did not bind to highly homologous family proteins and negative cells.
[0213] Detection of species cross binding of mouse monoclonal antibodies: the macaca fascicularis and mouse CDH3 extracellular region proteins described in Embodiment 1 were coated, and the ELISA method was used to detect the binding ability of candidate mouse monoclonal antibodies to proteins of different species. The results were shown in Table 3. Candidate antibodies Ab-B, Ab-C, Ab-D and Ab-A bound to macaca fascicularis CDH3 proteins, and substantially did not bind to mouse CDH3 proteins. Table 3: Detection of species cross binding of murine antibodies 2.2 Sequencing of anti-human CDH3 murine antibodies and preparation of chimeric antibodies
[0214] After hybridoma cell culture, cells were lysed and a first-strand cDNA was synthesized by using a cDNA reverse transcription kit (Thermo Fisher) . Primers were used to amplify the VH and VL genes of Ab-B, Ab-C, Ab-D and Ab-A from cDNA by a PCR method, and the PCR products were purified by a DNA purification kit (MACHEREY-NAGEL, Düren, Germany) ; and the VH and VL genes of Ab-B, Ab-D and Ab-A were homologously recombined into the pTT5 vector expressing the human heavy chain constant region IgG1 (SEQ ID NO: 121) and the human kappa light chain constant region CL (SEQ ID NO: 123) , and the VH and VL genes of Ab-C were homologously recombined into the pcDNA3.4 vector expressing the human heavy chain constant region IgG1 (SEQ ID NO: 121) and the human lambda light chain constant region CL (SEQ ID NO: 144) to construct a chimeric antibody expression vector. After PCR verification, positive clones were selected for sequencing. The sequences were analyzed by IMGT and Abysis websites. Recombinantly expressed chimeric antibodies Ab-B-Chi, Ab-C-Chi, Ab-D-Chi, and Ab-A-Chi were evaluated. 2.3 Evaluation of anti-human CDH3 chimeric antibodies
[0215] Detection of the binding of chimeric antibodies to cells: flow cytometry was used to detect the binding ability of chimeric antibodies and PCA062 mAb to tumor cells NCI-H358 and HCC1954, with hIgG1-TNP as a negative control. The results were shown in FIGS. 2A-2B. Ab-C-Chi, Ab-B-Chi and Ab-D-Chi antibodies were all bound to positive tumor cells with high affinity, which was comparable to the control antibody PCA062 mAb.
[0216] Detection of endocytosis of chimeric antibodies: a pHrodoTM (Thermo Fischer Scientific, Waltham, MA) method was used to detect the endocytosis ability of chimeric antibodies and PCA062 mAb in NCI-H358 cells, with hIgG1-TNP as a negative control. The pHrodoTM-labeled gradient-diluted antibodies would produce fluorescence after being endocytosed into low pH lysosomes, and the endocytosis ability was proportional to the fluorescence intensity. The results were shown in Table 4 and FIG. 3. Both Ab-C-Chi and Ab-B-Chi antibodies could be efficiently endocytosed, and had lower EC50 and higher maximum signal values than the control antibody PCA062 mAb (indicating that more antibodies could be endocytosed at low concentrations, and more antibodies could be endocytosed at saturation concentrations) . Table 4: Detection of the endocytosis of chimeric antibodies to NCI-H358 cells.
[0217] Detection of Hum-ZAP-labeled killing by chimeric antibodies: Hum-ZAP (Advanced Targeting Systems, Carlsbad, CA) was used to detect the in-vitro killing ability of chimeric antibodies Ab-B-Chi, Ab-C-Chi, Ab-D-Chi and PCA062 mAb on HCC1954 cells, with hIgG1-TNP as a negative control. The results were shown in Table 5 and FIG. 4. Candidate antibodies Ab-B-Chi, Ab-C-Chi and Ab-D-Chi had better killing ability than the control antibody PCA062 mAb, indicating that these screened antibodies with high affinity and high endocytosis activities could more strongly inhibit tumor cell growth and were more suitable for drug development. Table 5: Hum-ZAP detection of HCC1954 killing by chimeric antibodies Example 3: Humanization and evaluation of anti-human CDH3 antibodies 3.1 Humanization and expression of anti-CDH3 antibodies
[0218] Murine antibodies Ab-C, Ab-B, Ab-D and Ab-A were subjected to humanization modification by a CDR transplantation antibody humanization modification method. In short, the humanization modification involves the following steps of: comparing an amino acid sequence of a murine monoclonal antibody with an amino acid sequence of a human germline antibody to find the sequence with high homology and better physical and chemical properties as a human germline framework sequence; analyzing and examining HLA-DR affinity, and selecting the human germline framework sequence with low affinity; and then transplanting six CDRs of the murine antibody to the selected heavy chain and light chain framework sequences, respectively.
[0219] Further, by using a computer simulation technology, molecular docking was applied to analyze the variable region and a surrounding framework amino acid sequence thereof, so as to examine the spatial stereoscopic binding mode thereof. By calculating an electrostatic force, a van der Waals force, hydrophilicity and an entropy value, the key amino acids in the amino acid sequence of the murine antibody that can interact with CDH3 proteins and maintain the spatial structure were analyzed, and these murine amino acids were retained in the transplanted antibody. That is, a series of back mutations were performed on the amino acid residues in the FR region of the above humanized template, so that the humanized antibody could retain the antigen-binding ability of the murine antibody as much as possible.
[0220] According to the above method, a plurality of humanized antibodies were constructed on the basis of the CDRs of murine antibodies Ab-B, Ab-C, Ab-D and Ab-A. By the detection of protein and cell binding, expression level, thermal stability, hydrophobicity, freeze-thaw stability and the like, the final humanized molecules were named Ab-BHZ, Ab-CHZ, Ab-DHZ and Ab-AHZ, respectively; wherein the heavy chain constant regions of Ab-BHZ, Ab-CHZ, Ab-DHZ and Ab-AHZ antibodies were all human IgG1 heavy chain constant regions (SEQ ID NO: 121) ; and the light chain constant regions of Ab-BHZ, Ab-DHZ and Ab-AHZ antibodies were all human Kappa light chain constant regions (SEQ ID NO: 123) , and the light chain constant region of Ab-CHZ antibody was a human lambda light chain constant region (SEQ ID NO: 144) . In addition, according to the above method, the human IgG1 heavy chain constant region of Ab-BHZ (SEQ ID NO: 121) was replaced with a mutant human heavy chain constant region IgG1m (SEQ ID NO: 122) , and the expressed antibody was named Ab-BHZm.
[0221] The humanized antibody was entrusted to Nanjing GenScript Biotechnology Co., Ltd. for codon optimization as well as synthesis and ligation into the expression plasmid pTT5. The heavy chain and light chain expression plasmids of the humanized antibody were transfected into CHO-Scells at the same time. After expression for 7 days, a supernatant was collected by centrifugation. A recombinant antibody in the supernatant was purified by Protein A (MabSelect SuReTM, Cytiva) to afford an anti-human CDH3 humanized antibody.
[0222] The variable regions and CDR sequences of the anti-human CDH3 murine antibody and the humanized antibody obtained in above embodiments are summarized in the following table. Table 6: Variable regions and CDR amino acid sequences of anti-human CDH3 antibodies 3.2 Detection of the binding of anti-human CDH3 humanized antibodies to human CDH3 proteins
[0223] To detect the affinity of anti-human CDH3 humanized antibodies to human CDH3, the human CDH3 proteins were diluted to 1 μg / ml with a CBS coating solution, coated at 100 μl / well on a 96-well ELISA plate, and placed at 4℃ overnight. The gradient-diluted humanized antibodies were added after blocking, followed by an addition of secondary antibodies after incubation, subjected to development after washing, and terminated; and the OD450 nm absorbance value was read with an enzyme reader, the original data was imported into the software for nonlinear curve fitting to calculate the EC50 of each antibody binding to human CDH3, respectively. As shown in Table 7-1 and Table 7-2, all humanized antibodies Ab-BHZ, Ab-CHZ, Ab-DHZ and Ab-AHZ can bind to human CDH3 proteins well, and humanization does not significantly affect the binding ability. Table 7-1: Binding of anti-human CDH3 humanized antibodies to human CDH3-His proteins Table 7-2: Binding of anti-human CDH3 humanized antibodies to human CDH3-His proteins 3.3 Detection of cell affinity of anti-human CDH3 humanized antibodies
[0224] The affinity of anti-human CDH3 humanized antibodies to human non-small cell lung cancer cells NCI-H358, human breast ductal cancer cells HCC1954, human in situ pancreatic cancer cells BxPC-3 (ATCC) , CHO-hCDH3 and HT29-hCDH3 cells overexpressing human CDH3 was detected by flow cytometry (model Cytoflex, Beckman Coulter, Inc., Brea, CA, ) .
[0225] Adherently grown cells were digested, and an appropriate amount of cells were counted, taken, added with gradient-diluted antibodies after washing and resuspension, washed after incubation, followed by an addition of a fluorescent secondary antibody for staining, and finally washed and loaded to a machine for detection. Data processing: Median numerical values were exported and then imported into the software to calculate EC50. The results were shown in FIGS. 5-7, Table 8-1, and Table 8-2. In the aspect of binding to tumor cells or overexpressed cells, the humanized antibodies had a smaller EC50 than the control antibody PCA062 mAb or had a larger maximum signal value than the control antibody, indicating that humanized antibodies Ab-BHZ, Ab-CHZ, Ab-DHZ and Ab-AHZ had better binding activity to overexpressed human CDH3 cells or human tumor cells. Table 8-1: Assay of cell affinity of anti-human CDH3 humanized antibodies Table 8-2: Assay of cell affinity of anti-human CDH3 humanized antibodies 3.4 Detection of freezing-thawing stability of anti-human CDH3 humanized antibodies
[0226] The humanized antibody was repeatedly frozen and thawed, and the purity of the antibody before and after freezing and thawing was detected by SEC-HPLC. Specifically: 100 μl of 0.8 mg / ml humanized antibodies were placed in a -80℃ refrigerator for 2 h, dissolved in a 37℃water bath, and after a repetition of three times, loaded to a machine for antibody purity. The results were shown in Table 9. The humanized antibodies had good freeze-thaw stability, without obvious aggregates or obvious degradation. Table 9: Assay of freezing-thawing stability of anti-human CDH3 humanized antibodies 3.5 Detection of Thermal stability of anti-human CDH3 humanized antibodies
[0227] The thermal stability, expressed as melting temperature (Tm) , is one of the key factors affecting the development of an antibody therapy. In this study, the thermal stability (Tm) was determined by differential scanning calorimetry (DSC) . 1 milligram of samples in a PBS buffer solution was loaded into the wells (MicroCal VP-capillary DSC, Malvern Panalytical, Malvern, UK) . The samples were denatured by heating them from 40℃ to 99℃ at a rate of 60℃ / h. The results were shown in Table 10. The Tm values of humanized antibodies Ab-BHZ, Ab-CHZ and Ab-DHZ were all higher than 71℃, and the thermal stability was superior to that of the control antibody PCA062 mAb. Table 10: Assay of thermal stability of anti-human CDH3 humanized antibodies 3.6 Analysis of antigen-binding epitopes of anti-human CDH3 humanized antibodies
[0228] The antigen-binding epitopes of the anti-human CDH3 humanized antibodies were analyzed by ELISA. The control antibody PCA062 mAb was labeled with a biotin labeling kit (Thermo Fisher Scientific) . After the labeling was completed, the ELISA detection showed no significant change in binding activity to human CDH3 proteins, and the EC50 of the antibody was determined. The human CDH3 proteins were diluted to 1 μg / ml with a CBS coating solution, coated at 100 μl / well on a 96-well ELISA plate and placed at 4℃ overnight; and after washing and blocking, the biotin-labeled control antibody and the antibody to be tested were added and incubated at room temperature for 2 hours. After washing, a secondary antibody was added for incubation; and finally, color development was performed before termination, and the OD450nm absorbance value was read with a microplate reader. The raw data was imported into the software for nonlinear curve fitting (four parameters) . The results were shown in FIGS. 8A-8B. The candidate antibody Ab-BHZ competed with the control antibody PCA062 mAb for the epitope, while Ab-AHZ only weakly competed with PCA062 mAb and Ab-BHZ. 3.7 Detection of binding activity of anti-human CDH3 humanized antibodies to Fc receptors
[0229] The dynamic affinity of antibodies Ab-BHZ, Ab-BHZm, Ab-AHZ and PCA062 mAb to human Fc receptor proteins CD16a, CD32a, CD32b, CD64, C1q and FcRn (ACROBiosystems, Newark, DE) were detected by using ForteBio (Pall Life Sciences, Portsmouth, UK) . The specific method was as follows: an SA Sensor (Pall Life Sciences) was used to capture biotinylated proteins to be tested in a phosphate-buffered saline with (PBST) solution, respectively, and the antibodies to be tested were diluted with PBST; and association and dissociation were performed, and the measured results were opened in Data Analysis 11.0 software and analyzed under a 1: 1 mode by global fitting, to obtain an association rate, a dissociation rate and an affinity constant. The results were as shown in Table 11. Table 11: Activity detection of binding of CDH3 humanized antibodies to Fc receptors “N. D. ” means not detected.
[0230] The results showed that the mutationally modified Ab-BHZm did not bind to Fc receptors CD16a, CD32a, CD32b and CD64, weakly bound to C1q proteins, and did not have an ADCC (antibody dependent cell-mediated cytotoxicity) activity, an ADCP (antibody dependent cellular phagocytosis) activity or a greatly reduced CDC (complement dependent cytotoxicity) activity, which could reduce Fc receptor-mediated nonspecific killing and improve drug safety. At the same time, Ab-BHZm retained the FcRn protein binding activity and did not affect the half-life of the drug. 3.8 Detection of endocytosis of anti-human CDH3 humanized antibodies to cells
[0231] NCI-H358, HCC1806 A431 (Nanjing Cobioer) and HCC827 (ATCC) cells were digested, resuspended, counted and subsequently plated, and cultured overnight; the gradient-diluted antibodies were incubated with pHrodoTM Red secondary antibodies, followed by an addition into cells; and culturing was continued for 24 h, and the fluorescence signals of the digested cells were detected by flow cytometry. Therein, hIgG1-M was used as a negative control. The fluorescence signal values were used to make a fitting curve for different concentration points, and the EC50 was calculated. The results were shown in Table 12 and FIGS. 9-12. Antibodies Ab-BHZ and Ab-BHZm had good endocytosis activity, which is significantly superior to that of the control antibody. Table 12: Detection of endocytosis of antibodies to cells
[0232] Although the specific embodiments of the invention have been described in detail, those skilled in the art will understand according to all teachings that have been published, various modifications and alterations can be made to the details, and these changes are within the scope of protection of the invention. The entire invention is given by the appended claims and any equivalents thereof.
Claims
1.An antibody or an antigen-binding fragment thereof specifically binding to CDH3, wherein the antibody or the antigen-binding fragment thereof comprises complementarity determining regions (CDRs) as follows:(a) CDR-H1, CDR-H2 and CDR-H3 amino acid sequences of a heavy chain variable region (VH) amino acid sequence set forth in SEQ ID NO: 3 or 1; and / or CDR-L1, CDR-L2 and CDR-L3 amino acid sequences of a light chain variable region (VL) amino acid sequence set forth in SEQ ID NO: 4 or 2;(b) CDR-H1, CDR-H2 and CDR-H3 amino acid sequences of a VH amino acid sequence set forth in SEQ ID NO: 7 or 5; and / or CDR-L1, CDR-L2 and CDR-L3 amino acid sequences of a VL amino acid sequence set forth in SEQ ID NO: 8 or 6;(c) CDR-H1, CDR-H2 and CDR-H3 amino acid sequences of a VH set forth in SEQ ID NO: 11 or 9; and / or CDR-L1, CDR-L2 and CDR-L3 amino acid sequences of a VL amino acid sequence set forth in SEQ ID NO: 12 or 10;(d) CDR-H1, CDR-H2 and CDR-H3 amino acid sequences of a VH amino acid sequence set forth in SEQ ID NO: 15 or 13; and / or CDR-L1, CDR-L2 and CDR-L3 amino acid sequences of VL amino acid sequence set forth in SEQ ID NO: 14 or 12; or(e) CDR-H1, CDR-H2 and CDR-H3 amino acid sequences of a VH and / or CDR-L1, CDR-L2 and CDR-L3 amino acid sequences of a VL, wherein at least one CDR of the VH and / or the VL comprises a mutation compared to the VH and / or the VL of any one of (a) - (d) , and the mutation is a substitution, deletion or addition of one or several amino acids (for example, a substitution, deletion or addition of 1, 2, or 3 amino acids) .2.The antibody or the antigen-binding fragment thereof of claim 1, comprising:(a) CDR-H1, CDR-H2 and CDR-H3 amino acid sequences of the VH amino acid sequence set forth in SEQ ID NO: 3; and CDR-L1, CDR-L2 and CDR-L3 amino acid sequences of the VL amino acid sequence set forth in SEQ ID NO: 4;(b) CDR-H1, CDR-H2 and CDR-H3 amino acid sequences of the VH amino acid sequence set forth in SEQ ID NO: 1; and CDR-L1, CDR-L2 and CDR-L3 amino acid sequences of the VL amino acid sequence set forth in SEQ ID NO: 2;(c) CDR-H1, CDR-H2 and CDR-H3 amino acid sequences of the VH amino acid sequence set forth in SEQ ID NO: 7; and CDR-L1, CDR-L2 and CDR-L3 amino acid sequences of the VL amino acid sequence set forth in SEQ ID NO: 8;(d) CDR-H1, CDR-H2 and CDR-H3 amino acid sequences of the VH amino acid sequence set forth in SEQ ID NO: 5; and CDR-L1, CDR-L2 and CDR-L3 amino acid sequences of the VL amino acid sequence set forth in SEQ ID NO: 6;(e) CDR-H1, CDR-H2 and CDR-H3 amino acid sequences of the VH amino acid sequence set forth in SEQ ID NO: 11; and CDR-L1, CDR-L2 and CDR-L3 amino acid sequences of the VL amino acid sequence set forth in SEQ ID NO: 12;(f) CDR-H1, CDR-H2 and CDR-H3 amino acid sequences of the VH amino acid sequence set forth in SEQ ID NO: 9; and CDR-L1, CDR-L2 and CDR-L3 amino acid sequences of the VL amino acid sequence set forth in SEQ ID NO: 10;(g) CDR-H1, CDR-H2 and CDR-H3 amino acid sequences of the VH amino acid sequence set forth in SEQ ID NO: 15; and CDR-L1, CDR-L2 and CDR-L3 amino acid sequences of the VL amino acid sequence set forth in SEQ ID NO: 16; or(h) CDR-H1, CDR-H2 and CDR-H3 amino acid sequences of the VH amino acid sequence set forth in SEQ ID NO: 13; and CDR-L1, CDR-L2 and CDR-L3 amino acid sequences of the VL amino acid sequence set forth in SEQ ID NO: 14.3.The antibody or the antigen-binding fragment thereof of claim 1, comprising:(1) the following VH and / or VL, wherein the CDRs are defined according to the Chothia numbering system:(1a) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 17 or a variant thereof; a CDR-H2 comprising the amino acid sequence of SEQ ID NO: 27 or a variant thereof; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 32 or a variant thereof; and / or VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 35 or a variant thereof; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 38 or a variant thereof; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 42 or a variant thereof;(1b) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 17 or a variant thereof; a CDR-H2 comprising the amino acid sequence of SEQ ID NO: 22 or a variant thereof; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 32 or a variant thereof; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 35 or a variant thereof; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 38 or a variant thereof; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 42 or a variant thereof;(1c) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 44 or a variant thereof; a CDR-H2 comprising the amino acid sequence of SEQ ID NO: 49 or a variant thereof; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 55 or a variant thereof; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 58 or a variant thereof; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 63 or a variant thereof; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 66 or a variant thereof;(1d) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 44 or a variant thereof; a CDR-H2 comprising the amino acid sequence of SEQ ID NO: 49 or a variant thereof; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 55 or a variant thereof; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 58 or a variant thereof; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 61 or a variant thereof; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 66 or a variant thereof;(1e) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 68 or a variant thereof; a CDR-H2 comprising the amino acid sequence of SEQ ID NO: 73 or a variant thereof; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 80 or a variant thereof; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 84 or a variant thereof; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 88 or a variant thereof; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 91 or a variant thereof;(1f) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 68 or a variant thereof; a CDR-H2 comprising the amino acid sequence of SEQ ID NO: 73 or a variant thereof; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 80 or a variant thereof; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 83 or a variant thereof; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 87 or a variant thereof; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 91 or a variant thereof;(1g) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 93 or a variant thereof; a CDR-H2 comprising the amino acid sequence of SEQ ID NO: 103 or a variant thereof; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 108 or a variant thereof; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 114 or a variant thereof; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 117 or a variant thereof; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 119 or a variant thereof; or(1h) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 93 or a variant thereof; a CDR-H2 comprising the amino acid sequence of SEQ ID NO: 98 or a variant thereof; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 108 or a variant thereof; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 111 or a variant thereof; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 117 or a variant thereof; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 119 or a variant thereof;or(2) the following VH and / or VL, wherein the CDRs are defined according to the AbM numbering system:(2a) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 18 or a variant thereof; a CDR-H2 comprising the amino acid sequence of SEQ ID NO: 28 or a variant thereof; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 32 or a variant thereof; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 35 or a variant thereof; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 38 or a variant thereof; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 42 or a variant thereof;(2b) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 18 or a variant thereof; a CDR-H2 comprising the amino acid sequence of SEQ ID NO: 23 or a variant thereof; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 32 or a variant thereof; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 35 or a variant thereof; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 38 or a variant thereof; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 42 or a variant thereof;(2c) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 45 or a variant thereof; a CDR-H2 comprising the amino acid sequence of SEQ ID NO: 50 or a variant thereof; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 55 or a variant thereof; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 58 or a variant thereof; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 63 or a variant thereof; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 66 or a variant thereof;(2d) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 45 or a variant thereof; a CDR-H2 comprising the amino acid sequence of SEQ ID NO: 50 or a variant thereof; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 55 or a variant thereof; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 58 or a variant thereof; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 61 or a variant thereof; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 66 or a variant thereof;(2e) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 69 or a variant thereof; a CDR-H2 comprising the amino acid sequence of SEQ ID NO: 74 or a variant thereof; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 80 or a variant thereof; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 84 or a variant thereof; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 88 or a variant thereof; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 91 or a variant thereof;(2f) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 69 or a variant thereof; a CDR-H2 comprising the amino acid sequence of SEQ ID NO: 74 or a variant thereof; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 80 or a variant thereof; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 83 or a variant thereof; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 87 or a variant thereof; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 91 or a variant thereof;(2g) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 94 or a variant thereof; a CDR-H2 comprising the amino acid sequence of SEQ ID NO: 104 or a variant thereof; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 108 or a variant thereof; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 114 or a variant thereof; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 117 or a variant thereof; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 119 or a variant thereof; or(2h) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 94 or a variant thereof; a CDR-H2 comprising the amino acid sequence of SEQ ID NO: 99 or a variant thereof; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 108 or a variant thereof; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 111 or a variant thereof; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 117 or a variant thereof; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 119 or a variant thereof;or(3) the following VH and / or VL, wherein the CDRs are defined according to the Kabat numbering system:(3a) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 19 or a variant thereof; a CDR-H2 comprising the amino acid sequence of SEQ ID NO: 29 or a variant thereof; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 32 or a variant thereof; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 35 or a variant thereof; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 38 or a variant thereof; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 42 or a variant thereof;(3b) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 19 or a variant thereof; a CDR-H2 comprising the amino acid sequence of SEQ ID NO: 24 or a variant thereof; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 32 or a variant thereof; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 35 or a variant thereof; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 38 or a variant thereof; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 42 or a variant thereof;(3c) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 46 or a variant thereof; a CDR-H2 comprising the amino acid sequence of SEQ ID NO: 52 or a variant thereof; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 55 or a variant thereof; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 58 or a variant thereof; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 63 or a variant thereof; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 66 or a variant thereof;(3d) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 46 or a variant thereof; a CDR-H2 comprising the amino acid sequence of SEQ ID NO: 51 or a variant thereof; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 55 or a variant thereof; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 58 or a variant thereof; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 61 or a variant thereof; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 66 or a variant thereof;(3e) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 70 or a variant thereof; a CDR-H2 comprising the amino acid sequence of SEQ ID NO: 77 or a variant thereof; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 80 or a variant thereof; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 84 or a variant thereof; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 88 or a variant thereof; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 91 or a variant thereof;(3f) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 70 or a variant thereof; a CDR-H2 comprising the amino acid sequence of SEQ ID NO: 75 or a variant thereof; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 80 or a variant thereof; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 83 or a variant thereof; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 87 or a variant thereof; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 91 or a variant thereof;(3g) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 95 or a variant thereof; a CDR-H2 comprising the amino acid sequence of SEQ ID NO: 105 or a variant thereof; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 108 or a variant thereof; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 114 or a variant thereof; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 117 or a variant thereof; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 119 or a variant thereof; or(3h) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 95 or a variant thereof; a CDR-H2 comprising the amino acid sequence of SEQ ID NO: 100 or a variant thereof; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 108 or a variant thereof; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 111 or a variant thereof; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 117 or a variant thereof; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 119 or a variant thereof;or(4) the following VH and / or VL, wherein the CDRs are defined according to the Contact numbering system:(4a) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 20 or a variant thereof; a CDR-H2 comprising the amino acid sequence of SEQ ID NO: 30 or a variant thereof; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 33 or a variant thereof; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 36 or a variant thereof; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 40 or a variant thereof; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 43 or a variant thereof;(4b) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 20 or a variant thereof; a CDR-H2 comprising the amino acid sequence of SEQ ID NO: 25 or a variant thereof; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 33 or a variant thereof; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 36 or a variant thereof; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 39 or a variant thereof; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 43 or a variant thereof;(4c) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 47 or a variant thereof; a CDR-H2 comprising the amino acid sequence of SEQ ID NO: 53 or a variant thereof; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 56 or a variant thereof; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 59 or a variant thereof; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 64 or a variant thereof; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 67 or a variant thereof;(4d) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 47 or a variant thereof; a CDR-H2 comprising the amino acid sequence of SEQ ID NO: 53 or a variant thereof; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 56 or a variant thereof; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 59 or a variant thereof; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 62 or a variant thereof; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 67 or a variant thereof;(4e) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 71 or a variant thereof; a CDR-H2 comprising the amino acid sequence of SEQ ID NO: 78 or a variant thereof; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 81 or a variant thereof; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 85 or a variant thereof; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 89 or a variant thereof; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 92 or a variant thereof;(4f) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 71 or a variant thereof; a CDR-H2 comprising the amino acid sequence of SEQ ID NO: 76 or a variant thereof; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 81 or a variant thereof; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 85 or a variant thereof; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 89 or a variant thereof; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 92 or a variant thereof;(4g) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 96 or a variant thereof; a CDR-H2 comprising the amino acid sequence of SEQ ID NO: 106 or a variant thereof; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 109 or a variant thereof; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 115 or a variant thereof; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 118 or a variant thereof; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 120 or a variant thereof; or(4h) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 96 or a variant thereof; a CDR-H2 comprising the amino acid sequence of SEQ ID NO: 101 or a variant thereof; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 109 or a variant thereof; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 112 or a variant thereof; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 118 or a variant thereof; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 120 or a variant thereof;or(5) the following VH and / or VL, wherein the CDRs are defined according to the IMGT numbering system:(5a) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 21 or a variant thereof; a CDR-H2 comprising the amino acid sequence of SEQ ID NO: 31 or a variant thereof; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 34 or a variant thereof; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 37 or a variant thereof; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 41 or a variant thereof; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 42 or a variant thereof;(5b) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 21 or a variant thereof; a CDR-H2 comprising the amino acid sequence of SEQ ID NO: 26 or a variant thereof; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 34 or a variant thereof; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 37 or a variant thereof; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 41 or a variant thereof; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 42 or a variant thereof;(5c) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 48 or a variant thereof; a CDR-H2 comprising the amino acid sequence of SEQ ID NO: 54 or a variant thereof; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 57 or a variant thereof; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 60 or a variant thereof; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 65 or a variant thereof; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 66 or a variant thereof;(5d) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 72 or a variant thereof; a CDR-H2 comprising the amino acid sequence of SEQ ID NO: 79 or a variant thereof; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 82 or a variant thereof; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 86 or a variant thereof; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 90 or a variant thereof; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 91 or a variant thereof;(5e) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 97 or a variant thereof; a CDR-H2 comprising the amino acid sequence of SEQ ID NO: 107 or a variant thereof; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 110 or a variant thereof; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 116 or a variant thereof; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 41 or a variant thereof; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 119 or a variant thereof; or(5f) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 97 or a variant thereof; a CDR-H2 comprising the amino acid sequence of SEQ ID NO: 102 or a variant thereof; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 110 or a variant thereof; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 113 or a variant thereof; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 41 or a variant thereof; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 119 or a variant thereof;wherein the variant of any one of (1a) , (1b) , (1c) , (1d) , (1e) , (1f) , (1g) , (1h) , (2a) , (2b) , (2c) , (2d) , (2e) , (2f) , (2g) , (2h) , (3a) , (3b) , (3c) , (3d) , (3e) , (3f) , (3g) , (3h) , (4a) , (4b) , (4c) , (4d) , (4e) , (4f) , (4g) , (4h) , (5a) , (5b) , (5c) , (5d) , (5e) and (5f) has a substitution, deletion or addition of one or several amino acids (for example, a substitution, deletion or addition of 1, 2, or 3 amino acids) compared to the sequence from which it is derived.4.The antibody or the antigen-binding fragment thereof of claim 1 or claim 3, wherein the substitution is a conservative substitution.5.The antibody or the antigen-binding fragment thereof of claim 1, wherein the antibody or the antigen-binding fragment thereof comprises:(1) the following VH and / or VL, wherein the CDRs are defined according to the Chothia numbering system:(1a) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 17; a CDR-H2 comprising the amino acid sequence of SEQ ID NO: 27; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 32; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 35; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 38; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 42;(1b) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 17; a CDR-H2 comprising the amino acid sequence of SEQ ID NO: 22; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 32; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 35; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 38; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 42;(1c) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 44; a CDR-H2 comprising the amino acid sequence of SEQ ID NO: 49; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 55; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 58; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 63; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 66;(1d) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 44; a CDR-H2 comprising the amino acid sequence of SEQ ID NO: 49; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 55; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 58; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 61; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 66;(1e) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 68; a CDR-H2 comprising the amino acid sequence of SEQ ID NO: 73; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 80; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 84; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 88; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 91;(1f) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 68; a CDR-H2 comprising the amino acid sequence of SEQ ID NO: 73; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 80; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 83; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 87; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 91;(1g) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 93; a CDR-H2 comprising the amino acid sequence of SEQ ID NO: 103; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 108; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 114; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 117; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 119; or(1h) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 93; a CDR-H2 comprising the amino acid sequence of SEQ ID NO: 98; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 108; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 111; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 117; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 119; or(2) the following VH and / or VL, wherein the CDRs are defined according to the AbM numbering system:(2a) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 18; a CDR-H2 comprising the amino acid sequence of SEQ ID NO: 28; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 32; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 35; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 38; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 42;(2b) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 18; a CDR-H2 comprising the amino acid sequence of SEQ ID NO: 23; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 32; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 35; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 38; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 42;(2c) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 45; a CDR-H2 comprising the amino acid sequence of SEQ ID NO: 50; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 55; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 58; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 63; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 66;(2d) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 45; a CDR-H2 comprising the amino acid sequence of SEQ ID NO: 50; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 55; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 58; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 61; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 66;(2e) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 69; a CDR-H2 comprising the amino acid sequence of SEQ ID NO: 74; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 80; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 84; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 88; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 91;(2f) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 69; a CDR-H2 comprising the amino acid sequence of SEQ ID NO: 74; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 80; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 83; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 87; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 91;(2g) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 94; a CDR-H2 comprising the amino acid sequence of SEQ ID NO: 104; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 108; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 114; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 117; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 119; or(2h) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 94; a CDR-H2 comprising the amino acid sequence of SEQ ID NO: 99; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 108; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 111; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 117; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 119;or(3) the following VH and / or VL, wherein the CDRs are defined according to the Kabat numbering system:(3a) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 19; a CDR-H2 comprising the amino acid sequence of SEQ ID NO: 29; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 32; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 35; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 38; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 42;(3b) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 19; a CDR-H2 comprising the amino acid sequence of SEQ ID NO: 24; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 32; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 35; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 38; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 42;(3c) a VH comprising a CDR-H1 comprising the amino acid of SEQ ID NO: 46; a CDR-H2 comprising the amino acid sequence of SEQ ID NO: 52; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 55; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 58; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 63; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 66;(3d) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 46; a CDR-H2 comprising the amino acid sequence of SEQ ID NO: 51; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 55; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 58; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 61; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 66;(3e) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 70; a CDR-H2 comprising the amino acid sequence of SEQ ID NO: 77; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 80; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 84; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 88; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 91;(3f) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 70; a CDR-H2 comprising the amino acid sequence of SEQ ID NO: 75; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 80; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 83; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 87; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 91;(3g) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 95; a CDR-H2 comprising the amino acid sequence of SEQ ID NO: 105; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 108; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 114; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 117; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 119; or(3h) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 95; a CDR-H2 comprising the amino acid sequence of SEQ ID NO: 100; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 108; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 111; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 117; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 119; or(4) the following VH and / or VL, wherein the CDRs are defined according to the Contact numbering system:(4a) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 20; a CDR-H2 comprising the amino acid sequence of SEQ ID NO: 30; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 33; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 36; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 40; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 43;(4b) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 20; a CDR-H2 comprising the amino acid sequence of SEQ ID NO: 25; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 33; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 36; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 39; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 43;(4c) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 47; a CDR-H2 comprising the amino acid sequence of SEQ ID NO: 53; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 56; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 59; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 64; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 67;(4d) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 47; a CDR-H2 comprising the amino acid sequence of SEQ ID NO: 53; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 56; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 59; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 62; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 67;(4e) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 71; a CDR-H2 comprising the amino acid sequence of SEQ ID NO: 78; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 81; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 85; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 89; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 92;(4f) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 71; a CDR-H2 comprising the amino acid sequence of SEQ ID NO: 76; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 81; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 85; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 89; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 92;(4g) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 96; a CDR-H2 comprising the amino acid sequence of SEQ ID NO: 106; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 109; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 115; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 118; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 120; or(4h) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 96; a CDR-H2 comprising the amino acid sequence of SEQ ID NO: 101; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 109; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 112; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 118; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 120;or(5) the following VH and / or VL, wherein the CDRs are defined according to the IMGT numbering system:(5a) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 21; a CDR-H2 comprising the amino acid sequence of SEQ ID NO: 31; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 34; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 37; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 41; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 42;(5b) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 21; a CDR-H2 comprising the amino acid sequence of SEQ ID NO: 26; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 34; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 37; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 41; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 42;(5c) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 48; a CDR-H2 comprising the amino acid sequence of SEQ ID NO: 54; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 57; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 60; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 65; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 66;(5d) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 72; a CDR-H2 comprising the amino acid sequence of SEQ ID NO: 79; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 82; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 86; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 90; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 91;(5e) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 97; a CDR-H2 comprising the amino acid sequence of SEQ ID NO: 107; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 110; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 116; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 41; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 119; or(5f) a VH comprising a CDR-H1 comprising the amino acid sequence of SEQ ID NO: 97; a CDR-H2 comprising the amino acid sequence of SEQ ID NO: 102; and a CDR-H3 comprising the amino acid sequence of SEQ ID NO: 110; and / or a VL comprising a CDR-L1 comprising the amino acid sequence of SEQ ID NO: 113; a CDR-L2 comprising the amino acid sequence of SEQ ID NO: 41; and a CDR-L3 comprising the amino acid sequence of SEQ ID NO: 119.6.The antibody or the antigen-binding fragment thereof of any one of claims 1-4, comprising:(a) a VH comprising the amino acid sequence set forth in SEQ ID NO: 3 or a variant thereof and / or a VL comprising the amino acid sequence set forth in SEQ ID NO: 4 or a variant thereof;(b) a VH comprising the amino acid sequence set forth in SEQ ID NO: 1 or a variant thereof and / or a VL comprising the amino acid sequence set forth in SEQ ID NO: 2 or a variant thereof;(c) a VH comprising the amino acid sequence set forth in SEQ ID NO: 7 or a variant thereof and / or a VL comprising the amino acid sequence set forth in SEQ ID NO: 8 or a variant thereof;(d) a VH comprising the amino acid sequence set forth in SEQ ID NO: 5 or a variant thereof and / or a VL comprising the amino acid sequence set forth in SEQ ID NO: 6 or a variant thereof;(e) a VH comprising the amino acid sequence set forth in SEQ ID NO: 11 or a variant thereof and / or a VL comprising the amino acid sequence set forth in SEQ ID NO: 12 or a variant thereof;(f) a VH comprising the amino acid sequence set forth in SEQ ID NO: 9 or a variant thereof and / or a VL comprising the amino acid sequence set forth in SEQ ID NO: 10 or a variant thereof;(g) a VH comprising the amino acid sequence set forth in SEQ ID NO: 15 or a variant thereof and / or a VL comprising the amino acid sequence set forth in SEQ ID NO: 16 or a variant thereof; or(h) a VH comprising the amino acid sequence set forth in SEQ ID NO: 13 or a variant thereof and / or a VL comprising the amino acid sequence set forth in SEQ ID NO: 14 or a variant thereof;wherein the variant has at least 80%, at least 85%, at least 90%, at least 91%, at least 92%, at least 93%, at least 94%, at least 95%, at least 96%, at least 97%, at least 98%, at least 99%or 100%sequence identity compared to the sequence from which it is derived, or has a substitution, deletion or addition of one or several amino acids (for example, a substitution, deletion or addition of 1, 2, 3, 4 or 5 amino acids) compared to the sequence from which it is derived.7.The antibody or the antigen-binding fragment thereof of claim 6, wherein the substitution is a conservative substitution.8.The antibody or the antigen-binding fragment thereof of claim 6, comprising:(a) a VH comprising the amino acid sequence set forth in SEQ ID NO: 3 and a VL comprising the amino acid sequence set forth in SEQ ID NO: 4;(b) a VH comprising the amino acid sequence set forth in SEQ ID NO: 1 and a VL comprising the amino acid sequence set forth in SEQ ID NO: 2;(c) a VH comprising the amino acid sequence set forth in SEQ ID NO: 7 and a VL comprising the amino acid sequence set forth in SEQ ID NO: 8;(d) a VH comprising the amino acid sequence set forth in SEQ ID NO: 5 and a VL comprising the amino acid sequence set forth in SEQ ID NO: 6;(e) a VH comprising the amino acid sequence set forth in SEQ ID NO: 11 and a VL comprising the amino acid sequence set forth in SEQ ID NO: 12;(f) a VH comprising the amino acid sequence set forth in SEQ ID NO: 9 and a VL comprising the amino acid sequence set forth in SEQ ID NO: 10;(g) a VH comprising the amino acid sequence set forth in SEQ ID NO: 15 and a VL comprising the amino acid sequence set forth in SEQ ID NO: 16; or(h) a VH comprising the amino acid sequence set forth in SEQ ID NO: 13 and a VL comprising the amino acid sequence set forth in SEQ ID NO: 14.9.The antibody or the antigen-binding fragment thereof of any one of claims 1-8, wherein the antibody or the antigen-binding fragment thereof is a murine antibody, a chimeric antibody, or a humanized antibody.10.The antibody or the antigen-binding fragment thereof of any one of claims 1-9, wherein the antibody or the antigen-binding fragment thereof further comprises a constant region from or derived from a human immunoglobulin.11.The antibody or the antigen-binding fragment thereof of any one of claims 1-9, wherein the heavy chain of the antibody or the antigen-binding fragment thereof comprises a heavy chain constant region from or derived from the human immunoglobulin (for example, IgG1, IgG2, IgG3, or IgG4) wherein the heavy chain constant region comprises a wild-type Fc region, or comprises a mutated or chemically modified Fc region having an altered effector function compared to the wild-type Fc region.12.The antibody or the antigen-binding fragment thereof of any one of claims 1-9, wherein the antibody or the antigen-binding fragment thereof comprises a variant of a human IgG1 heavy chain constant region, and the variant has the following substitutions compared to the wild-type sequence from which it is derived: Leu234Ala, Leu235Ala, and Gly237Ala (positions according to the EU numbering system) .13.The antibody or the antigen-binding fragment thereof of any one of claims 1-9, wherein the light chain of the antibody or the antigen-binding fragment thereof comprises a light chain constant region from or derived from the human immunoglobulin (for example, κ or λ) .14.The antibody or the antigen-binding fragment thereof of any one of claims 1-9, wherein the antibody or the antigen-binding fragment thereof comprises a heavy chain constant region (CH) comprising the amino acid sequence set forth in SEQ ID NO: 121 or a variant thereof, and the variant has a conservative substitution of at most 20 amino acids (for example, a conservative substitution of at most 15, at most 10, or at most 5 amino acids; for example, a conservative substitution of 1, 2, 3, 4, or 5 amino acids) compared to SEQ ID NO: 121.15.The antibody or the antigen-binding fragment thereof of any one of claims 1-9, wherein the antibody or the antigen-binding fragment thereof comprises a light chain constant region (CL) comprises the amino acid sequence set forth in SEQ ID NO: 123 or 144 or a variant thereof, and the variant has a conservative substitution of at most 20 amino acids (for example, a conservative substitution of at most 15, at most 10, or at most 5 amino acids; for example, a conservative substitution of 1, 2, 3, 4, or 5 amino acids) compared to SEQ ID NO: 123 or 144.16.The antibody or the antigen-binding fragment thereof of any one of claims 1-9, wherein the antibody or the antigen-binding fragment thereof comprises a variant of a human IgG1 heavy chain constant region comprising the amino acid sequence set forth in SEQ ID NO: 122.17.The antibody or the antigen-binding fragment thereof of any one of claims 1-9, wherein the antibody or the antigen-binding fragment thereof comprises a CH comprising the amino acid sequence set forth in SEQ ID NO: 121 or 122 and a CL comprising the amino acid sequence set forth in SEQ ID NO: 123 or 144.18.The antibody or the antigen-binding fragment thereof of claim 10, wherein the CH comprises the amino acid sequence set forth in SEQ ID NO: 121 or 122, or the variant thereof lacking a C-terminal lysine.19.The antibody or the antigen-binding fragment thereof of any one of claims 1-18, comprising:(1) a heavy chain comprising a VH comprising the amino acid sequence set forth in SEQ ID NO: 3 and a CH comprising the amino acid sequence set forth in SEQ ID NO: 122, and a light chain comprising a VL comprising the amino acid sequence set forth in SEQ ID NO: 4 and a CL comprising the amino acid sequence set forth in SEQ ID NO: 123;(2) a heavy chain comprising a VH comprising the amino acid sequence set forth in SEQ ID NO: 3 and a CH comprising the amino acid sequence set forth in SEQ ID NO: 121, and a light chain comprising a VL comprising the amino acid sequence set forth in SEQ ID NO: 4 and a CL comprising the amino acid sequence set forth in SEQ ID NO: 123;(3) a heavy chain comprising a VH comprising the amino acid sequence set forth in SEQ ID NO: 1 and a CH comprising the amino acid sequence set forth in SEQ ID NO: 121, and a light chain comprising a VL comprising the amino acid sequence set forth in SEQ ID NO: 2 and a CL comprising the amino acid sequence set forth in SEQ ID NO: 123;(4) a heavy chain comprising a VH comprising the amino acid sequence set forth in SEQ ID NO: 7 and a CH comprising the amino acid sequence set forth in SEQ ID NO: 121, and a light chain comprising a VL comprising the amino acid sequence set forth in SEQ ID NO: 8 and a CL comprising the amino acid sequence set forth in SEQ ID NO: 144;(5) a heavy chain comprising a VH comprising the amino acid sequence set forth in SEQ ID NO: 5 and a CH comprising the amino acid sequence set forth in SEQ ID NO: 121, and a light chain comprising a VL comprising the amino acid sequence set forth in SEQ ID NO: 6 and a CL comprising the amino acid sequence set forth in SEQ ID NO: 144;(6) a heavy chain comprising a VH comprising the amino acid sequence set forth in SEQ ID NO: 11 and a CH comprising the amino acid sequence set forth in SEQ ID NO: 121, and a light chain comprising a VL comprising the amino acid sequence set forth in SEQ ID NO: 12 and a CL comprising the amino acid sequence set forth in SEQ ID NO: 123;(7) a heavy chain comprising a VH comprising the amino acid sequence set forth in SEQ ID NO: 9 and a CH comprising the amino acid sequence set forth in SEQ ID NO: 121, and a light chain comprising a VL comprising the amino acid sequence set forth in SEQ ID NO: 10 and a CL comprising the amino acid sequence set forth in SEQ ID NO: 123;(8) a heavy chain comprising a VH comprising the amino acid sequence set forth in SEQ ID NO: 15 and a CH comprising the amino acid sequence set forth in SEQ ID NO: 121, and a light chain comprising a VL comprising the amino acid sequence set forth in SEQ ID NO: 16 and a CL comprising the amino acid sequence set forth in SEQ ID NO: 123; or(9) a heavy chain comprising a VH comprising the amino acid sequence set forth in SEQ ID NO: 13 and a CH comprising the amino acid sequence set forth in SEQ ID NO: 121, and a light chain comprising a VL comprising the amino acid sequence set forth in SEQ ID NO: 14 and CL comprising the amino acid sequence set forth in SEQ ID NO: 123.20.The antibody or the antigen-binding fragment thereof of claim 6-8, or 19, wherein N-terminal glutamine of the VH comprising the amino acid sequence set forth in any one of SEQ ID NOs: 3, 1, 7, 5, 11, 9, 15 and 13 or a variant thereof is subjected to cyclization to form pyroglutamic acid or pyroglutamate.21.The antibody or the antigen-binding fragment thereof of any one of claims 1-20, comprising:(1) a heavy chain comprising the amino acid sequence set forth in SEQ ID NO: 126, and a light chain comprising the amino acid sequence set forth in SEQ ID NO: 125;(2) a heavy chain comprising the amino acid sequence set forth in SEQ ID NO: 124, and a light chain comprising the amino acid sequence set forth in SEQ ID NO: 125;(3) a heavy chain comprising the amino acid sequence set forth in SEQ ID NO: 127, and a light chain comprising the amino acid sequence set forth in SEQ ID NO: 128;(4) a heavy chain comprising the amino acid sequence set forth in SEQ ID NO: 129, and a light chain comprising the amino acid sequence set forth in SEQ ID NO: 130;(5) a heavy chain comprising the amino acid sequence set forth in SEQ ID NO: 131, and a light chain comprising the amino acid sequence set forth in SEQ ID NO: 132;(6) a heavy chain comprising the amino acid sequence set forth in SEQ ID NO: 133, and a light chain comprising the amino acid sequence set forth in SEQ ID NO: 134;(7) a heavy chain comprising the amino acid sequence set forth in SEQ ID NO: 135, and a light chain comprising the amino acid sequence set forth in SEQ ID NO: 136;(8) a heavy chain comprising the amino acid sequence set forth in SEQ ID NO: 137, and a light chain comprising the amino acid sequence set forth in SEQ ID NO: 138; or(9) a heavy chain comprising the amino acid sequence set forth in SEQ ID NO: 139, and a light chain comprising the amino acid sequence set forth in SEQ ID NO: 140.22.The antibody or the antigen-binding fragment thereof of claim 21, wherein the N-terminal glutamine of the heavy chain comprising the amino acid sequence set forth in any one of SEQ ID NOs: 126, 124, 127, 129, 131, 133, 135, 137, and 139 is subjected to cyclization to form pyroglutamic acid or pyroglutamate; and / or the heavy chain comprising the amino acid sequence set forth in any one of SEQ ID NOs: 126, 124, 127, 129, 131, 133, 135, 137, and 139 lacks a C-terminal lysine.23.The antibody or the antigen-binding fragment thereof of claim 22, comprising:a heavy chain comprising the amino acid sequence set forth in SEQ ID NO: 141, and a light chain comprising the amino acid sequence set forth in SEQ ID NO: 125;a heavy chain comprising the amino acid sequence set forth in SEQ ID NO: 142, and a light chain comprising the amino acid sequence set forth in SEQ ID NO: 125; ora heavy chain comprising the amino acid sequence set forth in SEQ ID NO: 143, and a light chain comprising the amino acid sequence set forth in SEQ ID NO: 125.24.The antibody or the antigen-binding fragment thereof of any one of claims 1-23, wherein the antibody or the antigen-binding fragment thereof is selected from an ScFv, a Fab, a Fab', a Fab'-SH, a F (ab') 2 and a Fv fragment, a disulfide-linked Fv (dsFv) , a diabody, a bispecific antibody, and a multispecific antibody.25.The antibody or the antigen-binding fragment thereof of any one of claims 1-24, wherein the antibody or the antigen-binding fragment thereof is conjugated to a label.26.The antibody or the antigen-binding fragment thereof of claim 25, wherein the label is a detectable label.27.The antibody or the antigen-binding fragment thereof of claim 25, wherein the label is an enzyme (for example, horseradish peroxidase) , a radionuclide, a fluorescent dye, a luminescent substance (such as a chemiluminescent substance) , or biotin.28.The antibody or the antigen-binding fragment thereof of any one of claims 1-27, wherein the antibody or the antigen-binding fragment thereof has one or more features selected from the following:(1) specifically binding to human or monkey CDH3, for example, as determined by ELISA or flow cytometry;(2) not binding or substantially not binding to CDH1 and CDH2, for example, as determined by flow cytometry;(3) having a reduced or eliminated ADCC activity and / or ADCP activity;(4) having a reduced CDC activity;(5) inducing CDH3 internalization, for example, as determined by flow cytometry;(6) inhibiting proliferation of a cell (such as a tumor cell) ; and / or(7) inhibiting tumor growth.29.An isolated nucleic acid molecule, comprising a nucleotide sequence encoding the antibody or the antigen-binding fragment thereof of any one of claims 1-24.30.A vector, comprising the nucleic acid molecule of claim 29, wherein preferably, the vector is a cloning vector or an expression vector.31.A host cell, comprising the nucleic acid molecule of claim 29 or the vector of claim 30.32.A method of preparing the antibody or the antigen-binding fragment thereof of any one of claims 1-24, comprising culturing the host cell of claim 31 under the condition of allowing the expression of the antibody or the antigen-binding fragment thereof; and recovering the antibody or the antigen-binding fragment thereof from the cultured host cell culture.33.The method of claim 32, wherein the host cell is a Chinese hamster ovary cell.34.An antibody or an antigen-binding fragment thereof obtainable by the method of claim 32 or 33.35.A conjugate, comprising the antibody or the antigen-binding fragment thereof of any one of claims 1-24 and a conjugation moiety linked thereto, wherein the conjugation moiety is selected from a detectable label (such as a radioisotope, a fluorescent substance, a luminescent substance, a colored substance, or an enzyme) or a therapeutic agent (such as a cytotoxic agent, a cytokine, a toxin, or a radionuclide) .36.A multispecific antibody, comprising the antibody or the antigen-binding fragment thereof of any one of claims 1-24, wherein the multispecific antibody comprises the antibody or the antigen-binding fragment thereof of any one of claims 1-24 as a first antigen-binding domain, and further comprises at least one second antigen-binding domain for other targets; andthe multispecific antibody is a bispecific antibody or a trispecific antibody or a tetraspecific antibody.37.A chimeric antigen receptor, comprising the antibody or the antigen-binding fragment thereof of any one of claims 1-24 (for example, ScFv) , a transmembrane domain, and one or more intracellular T cell signaling domains.38.A pharmaceutical composition, comprising the antibody or the antigen-binding fragment thereof of any one of claims 1-28, the isolated nucleic acid molecule of claim 29, the vector of claim 30, the host cell of claim 31, the antibody or the antigen-binding fragment thereof of claim 34, the conjugate of claim 35, the multispecific antibody of claim 36, the chimeric antigen receptor of claim 37 or a host cell expressing the chimeric antigen receptor, and a pharmaceutically acceptable carrier and / or excipient.39.The pharmaceutical composition of claim 38, wherein the pharmaceutical composition further comprises an additional pharmaceutically active agent.40.The pharmaceutical composition of claim 39, wherein the additional pharmaceutically active agent is a drug with anti-tumor activity.41.The pharmaceutical composition of claim 39, wherein the additional pharmaceutically active agent is selected from: CDH3 inhibitors, TROP2 inhibitors, B7H3 inhibitors, PTK7 inhibitors, PD-1 inhibitors, PD-L1 inhibitors, EGFR inhibitors, HER2 inhibitors, HER3 inhibitors, HER4 inhibitors, IGFR-1 inhibitors, mTOR inhibitors, PI3 kinase inhibitors, c-met or VEGF inhibitors, chemotherapeutic drugs, or any combination thereof.42.The pharmaceutical composition of claim 39, wherein the antibody or the antigen-binding fragment thereof and the additional pharmaceutically active agent are provided as separate components or as mixed components.43.A diagnostic or therapeutic kit, comprising the antibody or the antigen-binding fragment thereof of any one of claims 1-28, the isolated nucleic acid molecule of claim 29, the vector of claim 30, the host cell of claim 31, the antibody or the antigen-binding fragment thereof of claim 34, the conjugate of claim 35, the multispecific antibody of claim 36, the chimeric antigen receptor of claim 37 or a host cell expressing the chimeric antigen receptor, or the pharmaceutical composition of claim 38, and optionally instructions for use and / or a drug delivery device.44.Use of the antibody or the antigen-binding fragment thereof of any one of claims 1-28, the isolated nucleic acid molecule of claim 29, the vector of claim 30, the host cell of claim 31, the antibody or the antigen-binding fragment thereof of claim 34, the conjugate of claim 35, the multispecific antibody of claim 36, the chimeric antigen receptor of claim 37 or a host cell expressing the chimeric antigen receptor, or the pharmaceutical composition of claim 38 in the preparation of a medicament for the treatment and / or adjuvant treatment of a tumor.45.The use of claim 44, wherein the antibody or the antigen-binding fragment thereof, the isolated nucleic acid molecule, the vector, the host cell, the conjugate, the multispecific antibody or the pharmaceutical composition is administered in combination with the additional pharmaceutically active agent, for example, simultaneously, separately, or sequentially.46.The use of claim 45, wherein the additional pharmaceutically active agent is a drug with anti-tumor activity.47.The use of claim 45, wherein the additional pharmaceutically active agent is selected from: CDH3 inhibitors, TROP2 inhibitors, B7H3 inhibitors, PTK7 inhibitors, PD-1 inhibitors, PD-L1 inhibitors, EGFR inhibitors, HER2 inhibitors, HER3 inhibitors, HER4 inhibitors, IGFR-1 inhibitors, mTOR inhibitors, PI3 kinase inhibitors, c-met or VEGF inhibitors, chemotherapeutic drugs, or any combination thereof.48.The use of claim 44, wherein the tumor is a CDH3-positive tumor.49.The use of claim 44, wherein the tumor is selected from colorectal cancer, gastric cancer, lung cancer, cervical cancer, pancreatic cancer, esophageal cancer, ovarian cancer, thyroid cancer, bladder cancer, endometrial cancer, breast cancer, liver cancer, prostate cancer, skin cancer, and bile duct cancer.50.A method of inhibiting proliferation of a cell, comprising contacting the cell with the antibody or the antigen-binding fragment thereof of any one of claims 1-28, the isolated nucleic acid molecule of claim 29, the vector of claim 30, the host cell of claim 31, the antibody or the antigen-binding fragment thereof of claim 34, the conjugate of claim 35, the multispecific antibody of claim 36, the chimeric antigen receptor of claim 37 or a host cell expressing the chimeric antigen receptor, or the pharmaceutical composition of claim 38.51.The method of claim 50, wherein the cell expresses or overexpresses CDH3.52.The method of claim 50, wherein the cell is a tumor cell.53.A method for the treatment and / or adjuvant treatment of a tumor in a subject, comprising administering to a subject in need thereof an effective amount of the antibody or the antigen-binding fragment thereof of any one of claims 1-28, the isolated nucleic acid molecule of claim 29, or the vector of claim 30, the host cell of claim 31, the antibody or the antigen-binding fragment thereof of claim 34, the conjugate of claim 35, the multispecific antibody of claim 36, the chimeric antigen receptor of claim 37 or a host cell expressing the chimeric antigen receptor, or the pharmaceutical composition of claim 38.54.The method of claim 53, further comprising administering to the subject a second therapy, wherein the second therapy is selected from surgery, chemotherapy, radiotherapy, immunotherapy, gene therapy, DNA therapy, RNA therapy, nanotherapy, viral therapy, and adjuvant therapy, or any combination thereof.55.The method of claim 54, wherein the second therapy may be applied with the method of claim 53 simultaneously, separately, or sequentially.56.The method of claim 53, wherein the tumor is a CDH3-positive tumor.57.The method of claim 53, wherein the tumor is selected from colorectal cancer, gastric cancer, lung cancer, cervical cancer, pancreatic cancer, esophageal cancer, ovarian cancer, thyroid cancer, bladder cancer, endometrial cancer, breast cancer, liver cancer, prostate cancer, skin cancer, and bile duct cancer.58.A method of detecting the presence or level of CDH3 in a sample, comprising contacting the sample with the antibody or the antigen-binding fragment thereof of any one of claims 1-28 under the condition of allowing formation of a complex between the antibody or the antigen-binding fragment thereof and CDH3; and detecting the formation of the complex.59.The method of claim 58, wherein the method is used for diagnosing a tumor, for example, a CDH3-positive tumor, for example, colorectal cancer, gastric cancer, lung cancer, cervical cancer, pancreatic cancer, esophageal cancer, ovarian cancer, thyroid cancer, bladder cancer, endometrial cancer, breast cancer, liver cancer, prostate cancer, skin cancer, or bile duct cancer, or any combination thereof.60.The method of claim 58, wherein the method comprises detecting an expression level of CDH3 in the sample to be tested from a subject, and comparing the expression level with a reference value, wherein an increase in the expression level compared to the reference value is an indication of a tumor.61.Use of the antibody or the antigen-binding fragment thereof of any one of claims 1-28, the isolated nucleic acid molecule of claim 29, the vector of claim 30, the host cell of claim 31, the antibody or the antigen-binding fragment thereof of claim 34, the conjugate of claim 35, the multispecific antibody of claim 36 in the preparation of a detection kit, wherein the kit is used for detecting the presence or level of CDH3 in a sample and / or diagnosing a tumor.62.The use of claim 61, wherein the tumor is a CDH3-positive tumor.63.The use of claim 61, wherein the tumor is selected from colorectal cancer, gastric cancer, lung cancer, cervical cancer, pancreatic cancer, esophageal cancer, ovarian cancer, thyroid cancer, bladder cancer, endometrial cancer, breast cancer, liver cancer, prostate cancer, skin cancer, and bile duct cancer, or any combination thereof.
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