Anti-IL2 antibodies
The invention relates to a humanized monoclonal antibody or fragment thereof which specifically binds to human interlukin-2 (IL2), whereby said humanized monoclonal antibody neutralizes the activity of human IL2 by binding to the human IL2 prior to, during, and/or subsequent to the binding of the human IL2 to the human IL2-receptor, and wherein the light chain variable region of the humanized monoclonal antibody comprises in its second framework region the contiguous amino acid sequence KAPKA at amino acid positions 42-46.
1. A humanized monoclonal antibody or fragment thereof which specifically binds to human interleukin-2 (IL2), wherein said humanized monoclonal antibody neutralizes the activity of human IL2 by binding to said human IL2 prior to, during, and/or subsequent to the binding of said human IL2 to the human IL2-receptor, and wherein a light chain variable region of said humanized monoclonal antibody comprises in a second framework region the contiguous amino acid sequence KAPKA (SEQ ID NO: 13).
2. The humanized monoclonal antibody or fragment thereof of claim 1 , wherein the contiguous amino acid sequence KAPKA (SEQ ID NO: 13) is located at amino acid positions 42-46 of the second framework region.
3. The humanized monoclonal antibody or fragment thereof of claim 1 , wherein at least one of a first, third and/or fourth light chain framework regions correspond(s) to human germline sequence for that/those region(s).
4. The humanized monoclonal antibody or fragment thereof of claim 1 , wherein the light chain variable region further comprises in a CDR1 region an amino acid sequence as set out in SEQ ID NO: 1, in a CDR2 region an amino acid sequence as set out in SEQ ID NO: 2 and in a CDR3 region an amino acid sequence as set out in SEQ ID NO: 3; and wherein a heavy chain variable region comprises in a CDR 1 region an amino acid sequence as set out in SEQ ID NO: 4, in a CDR2 region an amino acid sequence as set out in SEQ ID NO: 5 and in a CDR:3 region an amino acid sequence as set out in SEQ ID NO: 6.
5. The humanized monoclonal antibody or fragment thereof of claim 1 , wherein at least one of a first, third and/or fourth light chain framework regions correspond(s) to the human germline sequence for that/those region(s).
6. The humanized monoclonal antibody or fragment thereof of claim 1 , wherein amino acid sequence of the first light chain framework region, remaining amino acid sequences of the second light chain framework region, and amino acid sequence of the third light chain framework region, correspond to any of those of human germline subgroup VKI at loci O12, O2, O18, O8, A30, L1, L15, L4, L18, L5, L19, L8, L23, L9, L11 or L12; or of human germline subgroup VL1 at locus la; or any of those of human germline subgroup VL2at loci 2c, 2e, 2a2or 2b2.
7. The humanized monoclonal antibody or fragment thereof of claim 1 , wherein an amino acid sequence of a first heavy chain framework region, an amino acid sequence of a second heavy chain framework region, and an amino acid sequence of a third heavy chain framework region independently correspond to any of those of human germline subgroup VH3.
8. The humanized monoclonal antibody or fragment thereof of claim 7 , wherein an amino acid sequence of a first heavy chain framework region, an amino acid sequence of a second heavy chain framework region, and an amino acid sequence of a third heavy chain framework region are as in locus 3-07 of human germline subgroup VH3.
9. The humanized monoclonal antibody or fragment thereof of claim 6 , wherein the amino acid sequence of a fourth light chain framework region corresponds to that of human JK4 (FGGGTKVEIK) (SEQ ID NO: 14).
10. The humanized monoclonal antibody or fragment thereof of claim 1 , wherein said humanized monoclonal antibody comprises a light chain variable region comprising an amino acid sequence as set out in SEQ ID NO. 7 and a heavy chain variable region comprising an amino acid sequence as set out in SEQ ID NO. 8.
11. The humanized monoclonal antibody or fragment thereof of claim 1 , wherein said humanized monoclonal antibody comprises a light chain comprising an amino acid sequence as set out in SEQ ID NO. 9 and a heavy chain comprising an amino acid sequence as set out in SEQ ID NO. 10.
12. The humanized monoclonal antibody or fragment thereof according to claim 1 , wherein said antibody is an IgG.
13. The humanized monoclonal antibody or fragment thereof according to claim 12 , wherein said IgG is an IgG1 or Ig 0 4.
14. The humanized monoclonal antibody or fragment thereof according to claim 1 , wherein said fragment is an scFv, an Fv, a diabody, a tandem diabody, a Fab, a Fab′ or a F(ab)2.
15. The humanized monoclonal antibody or fragment thereof according to claim 14 , wherein said fragment is an scFv.
16. The humanized monoclonal antibody or fragment thereof according to claim 15 , wherein said scFv comprises an amino acid sequence as set out in SEQ ID NO. 11 or SEQ ID NO. 12.
17. A pharmaceutical composition comprising a humanized monoclonal antibody or fragment thereof according to claim 1 .
18. The pharmaceutical composition of claim 17 , wherein said pharmaceutical composition further comprises one or more anti-inflammatory or anti-cancer medicaments.
19. The humanized monoclonal antibody or fragment thereof of claim 15 , wherein said scFv comprises a light chain variable region having an amino acid sequence as set out in SEQ ID NO. 7 and a heavy chain variable region having an amino acid sequence as set out in SEQ ID NO. 8.