Anti-CXCL13 antibodies and methods of using the same
Compositions and methods are provided for treating diseases associated with CXCL13 expression, including certain autoimmune diseases, inflammatory diseases, and cancers. In particular, anti-CXCL13 monoclonal antibodies have been developed to neutralize CXCL13.
1. An isolated antibody or antigen-binding fragment thereof which specifically binds to human, murine, and cynomolgus monkey CXCL13, wherein said antibody or antigen-binding fragment comprises a heavy chain variable region (VH) and a light chain variable region (VL) selected from the group consisting of:
a) a VH having three complementarity determining regions (CDRs) of SEQ ID NO: 13 and a VL domain having three CDRs of SEQ ID NO: 15;
b) a VH having three CDRs of SEQ ID NO: 13 and a VL domain having three CDRs of SEQ ID NO: 17; and
c) a VH having three CDRs of SEQ ID NO: 3 and a VL domain having three CDRs of SEQ ID NO: 8.
2. The antibody or antigen-binding fragment thereof according to claim 1 , which is multispecific.
3. The antibody or antigen-binding fragment thereof according to claim 2 , which is bispecific.
4. The antibody or antigen-binding fragment thereof according to claim 1 , wherein said antigen-binding fragment is selected from the group consisting of an Fab fragment, an F(ab′) 2 fragment, an Fv fragment, and a scFv.
5. The antibody or antigen-binding fragment thereof according to claim 1 , which specifically binds to a CXCL13 polypeptide or fragment thereof, or a CXCL13 variant polypeptide with an affinity characterized by a dissociation constant (K D ) no greater than 5×10 −2 M, 10 −2 M, 5×10 −3 M, 10 −3 M, 5×10 −4 M, 10 −4 M, 5×10 −5 M, 10 −5 M, 5×10 −6 M, 10 −6 M, 5×10 −7 M, 10 −7 M, 5×10 −8 M, 10 −8 M, 5×10 −9 M, 10 −9 M, 5×10 −10 M, 10 −10 M, 5×10 −11 M, 10 −11 M, 5×10 −12 M, 5.7×10 −12 M, 8.4×10 −12 M, 10 −12 M, 5×10 −13 M, 10 −13 M, 5×10 −14 M, 10 −14 M, 5×10 −15 M, or 10 −15 M.
6. The antibody or antigen-binding fragment thereof according to claim 1 , which inhibits CXCL13 from binding to a CXCL13 receptor.
7. The antibody or antigen-binding fragment thereof according to claim 6 , wherein said CXCL13 receptor is CXCR5.
8. The antibody or antigen-binding fragment thereof according to claim 1 , wherein said antibody or fragment thereof is humanized, primatized or chimeric.
9. The antibody or antigen-binding fragment thereof according to claim 1 , further comprising a heterologous polypeptide fused thereto.
10. A composition comprising the antibody or antigen-binding fragment thereof according to claim 1 , and a carrier.
11. The composition of claim 10 , wherein said carrier is selected from the group consisting of saline, buffered saline, dextrose, water, glycerol, and combinations thereof.
12. The antibody or antigen-binding fragment thereof according to claim 1 , wherein the VH of said antibody or fragment thereof comprises heavy chain complementarity determining region 1 (VH-CDR1), VH-CDR2, and VH-CDR3 amino acid sequences set forth as SEQ ID NOs: 4, 5, and 6, respectively; and wherein the VL of said antibody or fragment thereof comprises light chain complementarity determining region 1 (VL-CDR1), VL-CDR2, and VL-CDR3 amino acid sequences set forth as SEQ ID NOs: 9 or 16, 10, and 11, respectively.
13. The antibody or antigen-binding fragment thereof according to claim 1 , wherein the VH and VL of said antibody or fragment thereof comprise amino acid sequences identical to VH and VL sequences selected from the group consisting of:
(i) SEQ ID NO: 13 and SEQ ID NO: 15, respectively;
(ii) SEQ ID NO: 13 and SEQ ID NO: 17, respectively; and
(iii) SEQ ID NO: 3 and SEQ ID NO: 8, respectively.
14. The antibody or antigen-binding fragment thereof according to claim 1 , wherein said VH and VL are selected from the group consisting of:
a) a VH comprising a heavy chain complementarity determining region 1 (VH-CDR1) comprising amino acid residues 31-35 of SEQ ID NO: 13, a VH-CDR2 comprising amino acid residues 50-65 of SEQ ID NO: 13, and a VH-CDR3 comprising amino acid residues 95-102 of SEQ ID NO: 13; and a VL comprising a light chain complementarity determining region 1 (VL-CDR1) comprising amino acid residues 24-34 of SEQ ID NO: 15, a VL-CDR2 comprising amino acid residues 50-56 of SEQ ID NO: 15, and a VL-CDR3 comprising amino acid residues 89-97 of SEQ ID NO: 15, wherein the CDR residues are numbered according to Kabat;
b) a VH comprising a VH-CDR1 comprising amino acid residues 26-32 of SEQ ID NO: 13, a VH-CDR2 comprising amino acid residues 52-58 of SEQ ID NO: 13, and a VH-CDR3 comprising amino acid residues 95-102 of SEQ ID NO: 13; and a VL comprising a VL-CDR1 comprising amino acid residues 26-32 of SEQ ID NO: 15, a VL-CDR2 comprising amino acid residues 50-52 of SEQ ID NO: 15, and a VL-CDR3 comprising amino acid residues 91-96 of SEQ ID NO: 15, wherein the CDR residues are numbered according to Chothia;
c) a VH comprising a VH-CDR1 comprising amino acid residues 31-35 of SEQ ID NO: 13, a VH-CDR2 comprising amino acid residues 50-65 of SEQ ID NO: 13, and a VH-CDR3 comprising amino acid residues 95-102 of SEQ ID NO: 13; and a VL comprising a VL-CDR1 comprising amino acid residues 24-34 of SEQ ID NO: 17, a VL-CDR2 comprising amino acid residues 50-56 of SEQ ID NO: 17, and a VL-CDR3 comprising amino acid residues 89-97 of SEQ ID NO: 17, wherein the CDR residues are numbered according to Kabat;
d) a VH comprising a VH-CDR1 comprising amino acid residues 26-32 of SEQ ID NO: 13, a VH-CDR2 comprising amino acid residues 52-58 of SEQ ID NO: 13, and a VH-CDR3 comprising amino acid residues 95-102 of SEQ ID NO: 13; and a VL comprising a VL-CDR1 comprising amino acid residues 26-32 of SEQ ID NO: 17, a VL-CDR2 comprising amino acid residues 50-52 of SEQ ID NO: 17, and a VL-CDR3 comprising amino acid residues 91-96 of SEQ ID NO: 17, wherein the CDR residues are numbered according to Chothia;
e) a VH comprising a VH-CDR1 comprising amino acid residues 31-35 of SEQ ID NO: 3, a VH-CDR2 comprising amino acid residues 50-65 of SEQ ID NO: 3, and a VH-CDR3 comprising amino acid residues 95-102 of SEQ ID NO: 3; and a VL comprising a VL-CDR1 comprising amino acid residues 24-34 of SEQ ID NO: 8, a VL-CDR2 comprising amino acid residues 50-56 of SEQ ID NO: 8, and a VL-CDR3 comprising amino acid residues 89-97 of SEQ ID NO: 8, wherein the CDR residues are numbered according to Kabat; and
f) a VH comprising a VH-CDR1 comprising amino acid residues 26-32 of SEQ ID NO: 3, a VH-CDR2 comprising amino acid residues 52-58 of SEQ ID NO: 3, and a VH-CDR3 comprising amino acid residues 95-102 of SEQ ID NO: 3; and a VL comprising a VL-CDR1 comprising amino acid residues 26-32 of SEQ ID NO: 8, a VL-CDR2 comprising amino acid residues 50-52 of SEQ ID NO: 8, and a VL-CDR3 comprising amino acid residues 91-96 of SEQ ID NO: 8, wherein the CDR residues are numbered according to Chothia.