Bispecific anti-CD37 antibodies, monoclonal anti-CD37 antibodies and methods of use thereof
CD37-specific bispecific antibody molecules binding to different epitopes of the human CD37 antigen which bispecific antibody molecules have enhanced Fc-Fc interactions upon binding to CD37 on the cell surface. The invention also relates to the monoclonal parental antibodies from which the first or the second binding region of the bispecific antibody molecules is obtained. The invention also relates to pharmaceutical compositions containing these molecules and the treatment of cancer and other diseases using these compositions.
1. An in vitro method for detecting the presence of a human CD37 antigen or a cell expressing human CD37 in a sample, said method comprising:
(a) contacting the sample with an antibody which binds to human CD37, wherein the antibody comprises a variable heavy chain (VH) region and a variable light chain (VL) region selected from the group consisting of:
(i) a VH region comprising CDR1, CDR2, and CDR3 sequences comprising the amino acid sequences set forth in SEQ ID NOs: 16, 17, and 18, respectively, and a VL region comprising CDR1, CDR2, and CDR3 sequences comprising the amino acid sequences set forth in SEQ ID NO: 20, the sequence KAS, and SEQ ID NO: 21, respectively;
(ii) a VH region comprising CDR1, CDR2, and CDR3 sequences comprising the amino acid sequences set forth in SEQ ID NOs: 9, 10, and 11, respectively, and a VL region comprising CDR1, CDR2, and CDR3 sequences comprising the amino acid sequences set forth in SEQ ID NO: 13, the sequence AAS, and SEQ ID NO: 14, respectively;
(iii) a VH region comprising CDR1, CDR2, and CDR3 sequences comprising the amino acid sequences set forth in SEQ ID NOs: 2, 3, and 4, respectively, and a VL region comprising CDR1, CDR2, and CDR3 sequences comprising the amino acid sequences set forth in SEQ ID NO: 6, the sequence EAS, and SEQ ID NO: 7, respectively;
(iv) a VH region comprising CDR1, CDR2, and CDR3 sequences comprising the amino acid sequences set forth in SEQ ID NOs: 23, 24, and 25, respectively, and a VL region comprising CDR1, CDR2, and CDR3 sequences comprising the amino acid sequences set forth in SEQ ID NO: 27, the sequence YAS, and SEQ ID NO: 31, respectively; and
(v) a VH region comprising CDR1, CDR2, and CDR3 sequences comprising the amino acid sequences set forth in SEQ ID NOs: 23, 24, and 25, respectively, and a VL region comprising CDR1, CDR2, and CDR3 sequences comprising the amino acid sequences set forth in SEQ ID NO: 27, the sequence YAS, and SEQ ID NO: 28, respectively,
wherein the antibody of any one of (i)-(v) optionally comprises an Fc region comprising at least one amino acid substitution corresponding to E430G, E345K, E430S, E430F, E430T, E345Q, E345R, E345Y, S440Y, or S440W in a Fc region of human IgG, wherein the numbering is according to the EU numbering system; and
wherein optionally the Fc region further comprises a K409R or F405L mutation, under conditions that allow for formation of a complex between the antibody and the CD37 antigen; and (b) detecting the presence of human CD37 antigen or a cell expressing the human CD37.
2. The method of claim 1 , wherein the antibody comprises a VH region and a VL region selected from the group consisting of:
(i) a VH region comprising an amino acid sequence having at least 90% identity to a VH region comprising the amino acid sequence set forth in SEQ ID NO: 15, and a VL region comprising an amino acid sequence having at least 90% identity to a VL region comprising the amino acid sequences set forth in SEQ ID NO: 19;
(ii) a VH region comprising an amino acid sequence having at least 90% identity to a VH region comprising the amino acid sequence set forth in SEQ ID NO: 8, and a VL region comprising an amino acid sequence having at least 90% identity to a VL region comprising the amino acid sequences set forth in SEQ ID NO: 12;
(iii) a VH region comprising an amino acid sequence having at least 90% identity to a VH region comprising the amino acid sequence set forth in SEQ ID NO: 1, and a VL region comprising an amino acid sequence having at least 90% identity to a VL region comprising the amino acid sequences set forth in SEQ ID NO: 5;
(iv) a VH region comprising an amino acid sequence having at least 90% identity to a VH region comprising the amino acid sequence set forth in SEQ ID NO: 22, and a VL region comprising an amino acid sequence having at least 90% identity to a VL region comprising the amino acid sequences set forth in SEQ ID NO: 26; and
(v) a VH region comprising an amino acid sequence having at least 90% identity to a VH region comprising the amino acid sequence set forth in SEQ ID NO: 22, and a VL region comprising an amino acid sequence having at least 90% identity to a VL region comprising the amino acid sequences set forth in SEQ ID NO: 29.
3. The method of claim 2 , wherein the antibody comprises a VH region and a VL region selected from the group consisting of:
(i) a VH region comprising the amino acid sequence set forth in SEQ ID NO: 15, and a VL region comprising the amino acid sequence set forth in SEQ ID NO: 19;
(ii) a VH region comprising the amino acid sequence set forth in SEQ ID NO: 8, and a VL region comprising the amino acid sequence set forth in SEQ ID NO: 12;
(iii) a VH region comprising the amino acid sequence set forth in SEQ ID NO: 1, and a VL region comprising the amino acid sequence set forth in SEQ ID NO: 5;
(iv) a VH region comprising the amino acid sequence set forth in SEQ ID NO: 22, and a VL region comprising the amino acid sequence set forth in SEQ ID NO: 26; and
(v) a VH region comprising the amino acid sequence set forth in SEQ ID NO: 22, and a VL region comprising the amino acid sequence set forth in SEQ ID NO: 29.
4. The method of claim 1 , wherein the antibody is an IgG1, IgG2, IgG3 or IgG4 isotype.
5. The method of claim 1 , wherein the antibody is human, humanized or chimeric.
6. The method of claim 1 , wherein the antibody is a full length antibody.
7. The method of claim 1 , wherein the antibody binds to both human and cynomolgus CD37.
8. An in vitro method for detecting the presence of a human CD37 antigen or a cell expressing human CD37 in a sample, said method comprising:
(a) contacting the sample with an antibody which binds to human CD37, wherein the antibody comprises a variable heavy chain (VH) region and a variable light chain (VL) region selected from the group consisting of:
(i) a VH region comprising an amino acid sequence having at least 90% identity to a VH region comprising the amino acid sequence set forth in SEQ ID NO: 15, and a VL region comprising an amino acid sequence having at least 90% identity to a VL region comprising the amino acid sequences set forth in SEQ ID NO: 19;
(ii) a VH region comprising an amino acid sequence having at least 90% identity to a VH region comprising the amino acid sequence set forth in SEQ ID NO: 8, and a VL region comprising an amino acid sequence having at least 90% identity to a VL region comprising the amino acid sequences set forth in SEQ ID NO: 12;
(iii) a VH region comprising an amino acid sequence having at least 90% identity to a VH region comprising the amino acid sequence set forth in SEQ ID NO: 1, and a VL region comprising an amino acid sequence having at least 90% identity to a VL region comprising the amino acid sequences set forth in SEQ ID NO: 5;
(iv) a VH region comprising an amino acid sequence having at least 90% identity to a VH region comprising the amino acid sequence set forth in SEQ ID NO: 22, and a VL region comprising an amino acid sequence having at least 90% identity to a VL region comprising the amino acid sequences set forth in SEQ ID NO: 26; and
(v) a VH region comprising an amino acid sequence having at least 90% identity to a VH region comprising the amino acid sequence set forth in SEQ ID NO: 22, and a VL region comprising an amino acid sequence having at least 90% identity to a VL region comprising the amino acid sequences set forth in SEQ ID NO: 29,
wherein the antibody of any one of (i)-(v) optionally comprises an Fc region comprising at least one amino acid substitution corresponding to E430G, E345K, E430S, E430F, E430T, E345Q, E345R, E345Y, S440Y, or S440W in a Fc region of human IgG, wherein the numbering is according to the EU numbering system; and
wherein optionally the Fc region further comprises a K409R or F405L mutation, under conditions that allow for formation of a complex between the antibody and the CD37 antigen; and (b) detecting the presence of human CD37 antigen or a cell expressing the human CD37.
9. An in vitro method for detecting the presence of a human CD37 antigen or a cell expressing human CD37 in a sample, said method comprising:
(a) contacting the sample with an antibody which binds to human CD37, wherein the antibody comprises a variable heavy chain (VH) region and a variable light chain (VL) region selected from the group consisting of:
(i) a VH region comprising an amino acid sequence having at most 10 amino acid substitutions relative to a VH region comprising the amino acid sequence set forth in SEQ ID NO: 15, and a VL region comprising an amino acid sequence having at most 10 amino acid substitutions relative to a VL region comprising the amino acid sequences set forth in SEQ ID NO: 19;
(ii) a VH region comprising an amino acid sequence having at most 10 amino acid substitutions relative to a VH region comprising the amino acid sequence set forth in SEQ ID NO: 8, and a VL region comprising an amino acid sequence having at most 10 amino acid substitutions relative to a VL region comprising the amino acid sequences set forth in SEQ ID NO: 12;
(iii) a VH region comprising an amino acid sequence having at most 10 amino acid substitutions relative to a VH region comprising the amino acid sequence set forth in SEQ ID NO: 1, and a VL region comprising an amino acid sequence having at most 10 amino acid substitutions relative to a VL region comprising the amino acid sequences set forth in SEQ ID NO: 5;
(iv) a VH region comprising an amino acid sequence having at most 10 amino acid substitutions relative to a VH region comprising the amino acid sequence set forth in SEQ ID NO: 22, and a VL region comprising an amino acid sequence having at most 10 amino acid substitutions relative to a VL region comprising the amino acid sequences set forth in SEQ ID NO: 26; and
(v) a VH region comprising an amino acid sequence having at most 10 amino acid substitutions relative to a VH region comprising the amino acid sequence set forth in SEQ ID NO: 22, and a VL region comprising an amino acid sequence having at most 10 amino acid substitutions relative to a VL region comprising the amino acid sequences set forth in SEQ ID NO: 29,
wherein the antibody of any one of (i)-(v) optionally comprises an Fc region comprising at least one amino acid substitution corresponding to E430G, E345K, E430S, E430F, E430T, E345Q, E345R, E345Y, S440Y, or S440W in a Fc region of human IgG, wherein the numbering is according to the EU numbering system; and
wherein optionally the Fc region further comprises a K409R or F405L mutation, under conditions that allow for formation of a complex between the antibody and the CD37 antigen; and (b) detecting the presence of human CD37 antigen or a cell expressing the human CD37.
10. The method of claim 1 , wherein the antibody is bispecific.