Antagonistic anti-CD40 antibodies and methods of antagonizing CD40 activity
The disclosure provides for antibodies that bind CD40, including a humanized antibody and a chimeric antibody with different Fc domains. The antibodies bind CD40 and do not exhibit CD40 agonist activity. The antibodies may comprise a modified IgG1 Fc domain, and exhibit minimal activation of immature dendritic cells. Compositions comprising antibodies, methods of use for treatment of diseases involving CD40 activity, and use in the preparation of a medicament for treatment of a disease involving CD40 activity are provided.
1. An isolated antibody, or antigen binding portion thereof, that specifically binds to human CD40, wherein the antibody comprises a heavy chain, and a light chain, wherein:
the heavy chain comprises a CDR1 comprising GYTFTDLSMHW (SEQ ID NO: 1), a CDR2 comprising YITPSSGYTAYNQKFKG (SEQ ID NO: 2), a CDR3 comprising LILQRGAY (SEQ ID NO: 3) and a human heavy chain constant region; and
the light chain comprises a CDR1 comprising RASKNVDSYGNSFMHW (SEQ ID NO: 4), a CDR2 comprising RASNLES (SEQ ID NO: 5), and a CDR3 comprising QQSNEDPLT (SEQ ID NO: 6) and a human light chain constant region, and
the human heavy chain constant region is a human IgG1 Fc domain comprising a mutation at Kabat position 238 that reduces binding to Fc-gamma-receptors (FcgRs), wherein proline 238 (P238) is mutated to one of the residues selected from the group consisting of: lysine, serine, alanine, and arginine, and wherein the antibody or antigen binding portion has binding to at least one FcgR selected from hCD32a/FcgRIIa, hCD32b/FcgRIIb, hCD16a/FcgRIIIa, or hCD16b/FcgRIIIb.
2. The isolated antibody, or antigen binding portion thereof of claim 1 , wherein the antibody or antigen binding portion thereof antagonizes activities of CD40.
3. The isolated antibody or antigen binding portion thereof of claim 1 , wherein the heavy chain variable region comprises the amino acid sequence of SEQ ID NO: 7 and the light chain variable region comprises the amino acid sequence of SEQ ID NO: 8.
4. The isolated antibody, or antigen binding portion thereof of claim 1 , wherein P238 is mutated to serine.
5. The isolated antibody, or antigen binding portion thereof of claim 1 , wherein P238 is mutated to lysine.
6. The isolated antibody, or antigen binding portion thereof of claim 5 , wherein the Fc domain comprises an amino acid sequence selected from the group consisting of: SEQ ID NO: 98 (IgG1a-P238K (-C-term Lys)), SEQ ID NO: 9 (IgG1a-P238K), SEQ ID NO: 99 (CH1-IgG1a-P238K (-C-term Lys)), SEQ ID NO: 10 (CH1-IgG1a-P238K), SEQ ID NO: 100 (IgG1f-P238K (-C-term Lys)), SEQ ID NO: 11 (IgG1f-P238K), SEQ ID NO: 101 (CH1-IgG1f-P238K (-C-term Lys)), and SEQ ID No: 12 (CH1-IgG1f-P238K).
7. The isolated antibody, or antigen binding portion thereof of claim 3 , wherein the human IgG1 Fc domain comprises the amino acid sequence of SEQ ID NO: 98 or SEQ ID NO: 100.
8. The isolated antibody, or antigen binding portion thereof of claim 1 , wherein the heavy chain comprises or consists of an amino acid sequence selected from the group consisting of: SEQ ID NO: 85, SEQ ID NO: 106, SEQ ID NO: 107, and SEQ ID NO: 108; and the light chain comprises or consists of the amino acid sequence of SEQ ID NO: 88.
9. The isolated antibody, or antigen binding portion thereof of claim 1 , wherein the antibody or antigen binding portion thereof is humanized.
10. The isolated antibody, or antigen binding portion thereof of claim 1 , wherein the antibody or antigen-binding portion thereof is linked to a therapeutic agent.
11. The isolated antibody, or antigen binding portion thereof of claim 1 , wherein the antibody or antigen-binding portion thereof is linked to a second functional moiety having a different binding specificity than the antibody or antigen binding portion thereof.
12. A pharmaceutical composition comprising: a) the isolated antibody, or antigen binding portion thereof, of claim 1 ; and b) a pharmaceutically acceptable carrier.
13. A method of treating an immune response by antagonizing CD40 activity in a subject comprising administering to the subject the isolated antibody, or the antigen binding portion thereof, of claim 1 .
14. The isolated antibody, or antigen binding portion thereof of claim 4 , wherein the Fc domain comprises an amino acid sequence selected from the group consisting of: SEQ ID NO: 98 (IgG1a-P238K (-C-term Lys)), SEQ ID NO: 9 (IgG1a-P238K), SEQ ID NO: 99 (CH1-IgG1a-P238K (-C-term Lys)), SEQ ID NO: 10 (CH1-IgG1a-P238K), SEQ ID NO: 100 (IgG1f-P238K (-C-term Lys)), SEQ ID NO: 11 (IgG1f-P238K), SEQ ID NO: 101 (CH1-IgG1f-P238K (-C-term Lys)), and SEQ ID No: 12 (CH1-IgG1f-P238K).
15. The method of claim 13 , wherein the subject has a disease selected from the group consisting of: Addison's disease, allergies, anaphylaxis, ankylosing spondylitis, asthma, atherosclerosis, atopic allergy, autoimmune diseases of the ear, autoimmune diseases of the eye, autoimmune hepatitis, autoimmune parotitis, bronchial asthma, coronary heart disease, Crohn's disease, diabetes, epididymitis, glomerulonephritis, Graves' disease, Guillain-Barre syndrome, Hashimoto's disease, hemolytic anemia, idiopathic thrombocytopenic purpura, inflammatory bowel disease, immune response to recombinant drug products, systemic lupus erythematosus, multiple sclerosis, myasthenia gravis, pemphigus, psoriasis, rheumatic fever, rheumatoid arthritis, sarcoidosis, scleroderma, Sjogren's syndrome, spondyloarthropathies, thyroiditis, transplant rejection, vasculitis, and ulcerative colitis.