초록

This application provides methods and compositions for modulating and/or depleting CD200 positive cells.

대표청구항 ▼

1. An isolated anti-CD200 antibody that: (i) inhibits the interaction between CD200 and CD200R; and(ii) comprises a variant Fc constant region that has ADCC activity or CDC activity equal to or less than the ADCC activity or CDC activity the anti-CD200 antibody would have if it had a G2/G4 Fc consta

1. An isolated anti-CD200 antibody that: (i) inhibits the interaction between CD200 and CD200R; and(ii) comprises a variant Fc constant region that has ADCC activity or CDC activity equal to or less than the ADCC activity or CDC activity the anti-CD200 antibody would have if it had a G2/G4 Fc constant region consisting of amino acid residues 137-462 of SEQ ID NO:13. 2. The isolated anti-CD200 antibody according to claim 1, wherein the anti-CD200 antibody is a murine antibody, a chimeric antibody, a humanized antibody, a deimmunized antibody, or a human antibody. 3. The isolated anti-CD200 antibody according to claim 1, wherein the variant Fc constant region is an altered form of a native Fc constant region selected from the group consisting of IgG1, IgG2, IgG3, IgG4, IgM, IgA1, IgA2, IgA, IgD, and IgE. 4. The isolated anti-CD200 antibody according to claim 1, wherein the variant Fc constant region was altered to comprise at least one amino acid substitution, insertion, or deletion relative to its corresponding native Fc constant region. 5. The isolated anti-CD200 antibody according to claim 1, wherein: (a) the variant Fc constant region is a G2/G4 constant region;(b) the variant Fc constant region comprises: (i) one or both of: (x) a phenylalanine to alanine substitution at position 234 and (y) a leucine to alanine substitution at position 235;(ii) a K322A mutation in the CH2 domain;(iii) the CH1 and hinge regions of an IgG2 antibody;(iv) the CH2 and CH3 regions of an IgG4 antibody; or(v) the CH1 and hinge regions of an IgG2 antibody and the CH2 and CH3 regions of an IgG4 antibody; or(c) the variant Fc constant region lacks a hinge region. 6. The isolated anti-CD200 antibody according to claim 5, wherein the G2/G4 constant region comprises amino acid residues 137-462 of SEQ ID NO:13. 7. The isolated anti-CD200 antibody according to claim 1, wherein the anti-CD200 antibody comprises: (a) a light chain polypeptide comprising: (i) amino acid residues 21 to 127 of SEQ ID NO:24; or(ii) amino acid residues 21 to 234 of SEQ ID NO:24; and(b) a heavy chain polypeptide comprising: (iii) amino acid residues 21 to 137 of SEQ ID NO:15; or(vi) amino acid residues 21 to 463 of SEQ ID NO:15. 8. The isolated anti-CD200 antibody according to claim 1, wherein the anti-CD200 antibody comprises: (a) a light chain polypeptide comprising: (i) amino acid residues 21 to 127 of SEQ ID NO:32; or(ii) amino acid residues 21 to 234 of SEQ ID NO:32; and(b) a heavy chain polypeptide comprising: (iii) amino acid residues 21 to 142 of SEQ ID NO:20. 9. The isolated anti-CD200 antibody according to claim 1, wherein the anti-CD200 antibody comprises: (a) a light chain polypeptide comprising: (i) amino acid residues 23 to 129 of SEQ ID NO:28; or(ii) amino acid residues 23 to 236 of SEQ ID NO:28; and(b) a heavy chain polypeptide comprising: (iii) amino acid residues 20 to 136 of SEQ ID NO:13; or(iv) amino acid residues 20 to 462 of SEQ ID NO:13. 10. The isolated anti-CD200 antibody according to claim 1, wherein the anti-CD200 antibody comprises: (a) a heavy chain polypeptide comprising: (i) amino acid residues 20 to 136 of SEQ ID NO:11; or(ii) amino acid residues 20 to 136 of SEQ ID NO:9; and(b) a light chain polypeptide comprising amino acid residues 23 to 129 of SEQ ID NO:26. 11. The isolated anti-CD200 antibody according to claim 1, wherein the variant Fc constant region has no ADCC activity or no CDC activity. 12. An isolated anti-CD200 antibody that: (i) inhibits the interaction between CD200 and CD200R; and(ii) comprises a variant Fc constant region that exhibits decreased effector function relative to the effector function of the native Fc constant region from which the variant Fc constant region was engineered. 13. The isolated anti-CD200 antibody according to claim 12, wherein the variant Fc constant region was engineered by: (a) introducing into a native Fc constant region at least one amino acid substitution, insertion, or deletion, wherein the amino acid sequence of the variant Fc constant region is at least 95% identical to the amino acid sequence of the native Fc constant region or (b) altering the glycosylation of a native Fc constant region, wherein the variant Fc constant region has reduced effector function as compared to the native Fc constant region. 14. The isolated anti-CD200 antibody according to claim 12, wherein the anti-CD200 antibody is a murine antibody, a chimeric antibody, a humanized antibody, a deimmunized antibody, or a human antibody. 15. The isolated anti-CD200 antibody according to claim 12, wherein the variant Fc constant region is an altered form of a native Fc constant region selected from the group consisting of IgG1, IgG2, IgG3, IgG4, IgM, IgA1, IgA2, IgA, IgD, and IgE. 16. The isolated anti-CD200 antibody according to claim 12, wherein the variant Fc constant region was altered to comprise at least one amino acid substitution, insertion, or deletion, relative to its corresponding native Fc constant region. 17. The isolated anti-CD200 antibody according to claim 12, wherein: (a) the variant Fc constant region is a G2/G4 constant region;(b) the variant Fc constant region comprises: (i) altered glycosylation;(ii) one or both of: (x) a phenylalanine to alanine substitution at position 234 and (y) a leucine to alanine substitution at position 235;(iii) a K322A mutation in the CH2 domain;(iv) the CH1 and hinge regions of an IgG2 antibody;(v) the CH2 and CH3 regions of an IgG4 antibody; or(vi) the CH1 and hinge regions of an IgG2 antibody and the CH2 and CH3 regions of an IgG4 antibody; or(c) the variant constant region lacks a hinge region. 18. The isolated anti-CD200 antibody according to claim 17, wherein the altered glycosylation comprises one or more of the following: (i) a change in one or more sugar components; (ii) presence of one or more additional sugar components; and (iii) absence of one or more sugar components. 19. The isolated anti-CD200 antibody according to claim 17, wherein the G2/G4 constant region comprises amino acid residues 137-462 of SEQ ID NO:13. 20. The isolated anti-CD200 antibody according to claim 12, wherein the variant Fc constant region is a produced in a cell line deficient in glycosylation. 21. The isolated anti-CD200 antibody according to claim 12, wherein the anti-CD200 antibody comprises: (a) a light chain polypeptide comprising: (i) amino acid residues 21 to 127 of SEQ ID NO:24; or(ii) amino acid residues 21 to 234 of SEQ ID NO:24; and(b) a heavy chain polypeptide comprising: (iii) amino acid residues 21 to 137 of SEQ ID NO:15; or(vi) amino acid residues 21 to 463 of SEQ ID NO:15. 22. The isolated anti-CD200 antibody according to claim 12, wherein the anti-CD200 antibody comprises: (a) a light chain polypeptide comprising: (i) amino acid residues 21 to 127 of SEQ ID NO:32; or(ii) amino acid residues 21 to 234 of SEQ ID NO:32; and(b) a heavy chain polypeptide comprising: (iii) amino acid residues 21 to 142 of SEQ ID NO:20. 23. The isolated anti-CD200 antibody according to claim 12, wherein the anti-CD200 antibody comprises: (a) a light chain polypeptide comprising: (i) amino acid residues 23 to 129 of SEQ ID NO:28; or(ii) amino acid residues 23 to 236 of SEQ ID NO:28; and(b) a heavy chain polypeptide comprising: (iii) amino acid residues 20 to 136 of SEQ ID NO:13; or(iv) amino acid residues 20 to 462 of SEQ ID NO:13. 24. The isolated anti-CD200 antibody according to claim 12, wherein the anti-CD200 antibody comprises: (a) a heavy chain polypeptide comprising: (i) amino acid residues 20 to 136 of SEQ ID NO:11; or(ii) amino acid residues 20 to 136 of SEQ ID NO:9; and(b) a light chain polypeptide comprising amino acid residues 23 to 129 of SEQ ID NO:26. 25. The isolated anti-CD200 antibody according to claim 12, wherein the variant Fc constant region has 0 to 20% of the FcR binding of the native Fc constant region. 26. The isolated anti-CD200 antibody according to claim 12, wherein the variant Fc constant region has reduced or no ADCC activity or CDC activity relative to the native Fc constant region. 27. An isolated anti-CD200 antibody comprising a G2/G4 constant region, wherein the anti-CD200 antibody inhibits the interaction between CD200 and CD200R. 28. The isolated anti-CD200 antibody according to claim 27, wherein the G2/G4 constant region comprises amino acid residues 137-462 of SEQ ID NO:13. 29. The isolated anti-CD200 antibody according to claim 27, wherein the anti-CD200 antibody is a murine antibody, a chimeric antibody, a humanized antibody, a deimmunized antibody, or a human antibody. 30. The isolated anti-CD200 antibody according to claim 27, wherein the anti-CD200 antibody comprises: I.(a) a light chain polypeptide comprising: (i) amino acid residues 21 to 127 of SEQ ID NO:24; or(ii) amino acid residues 21 to 234 of SEQ ID NO:24; and(b) a heavy chain polypeptide comprising: (iii) amino acid residues 21 to 137 of SEQ ID NO:15; or(vi) amino acid residues 21 to 463 of SEQ ID NO:15;II.(a) a light chain polypeptide comprising: (i) amino acid residues 21 to 127 of SEQ ID NO:32; or(ii) amino acid residues 21 to 234 of SEQ ID NO:32; and(b) a heavy chain polypeptide comprising: (iii) amino acid residues 21 to 142 of SEQ ID NO:20;III.(a) a light chain polypeptide comprising: (i) amino acid residues 23 to 129 of SEQ ID NO:28; or(ii) amino acid residues 23 to 236 of SEQ ID NO:28; and(b) a heavy chain polypeptide comprising: (iii) amino acid residues 20 to 136 of SEQ ID NO:13; or(iv) amino acid residues 20 to 462 of SEQ ID NO:13; orIV.(a) a heavy chain polypeptide comprising: (i) amino acid residues 20 to 136 of SEQ ID NO:11; or(ii) amino acid residues 20 to 136 of SEQ ID NO:9; and(b) a light chain polypeptide comprising amino acid residues 23 to 129 of SEQ ID NO:26.