Therapeutic CD47 antibodies
Provided are monoclonal antibodies and antigen-binding fragments thereof that bind to, and inhibit the activity of, CD47, as well as monoclonal antibodies and antigen binding fragments thereof that compete with the former for binding to CD47. Also provided are combinations of any of the foregoing. Such antibody compounds are variously effective in 1) treating tissue ischemia and ischemic-reperfusion injury (IRI) in the setting of organ preservation and transplantation, pulmonary hypertension, sickle cell disease, myocardial infarction, stroke, and other instances of surgery and/or trauma in which IRI is a component of pathogenesis; 2) in treating autoimmune and inflammatory diseases; and 3) as anti-cancer agents that are toxic to susceptible cancer cells, promoting their phagocytic uptake and clearance, or directly killing such cells.
1. A monoclonal antibody, or antigen-binding fragment thereof, that specifically binds human, rat, mouse and pig CD47, wherein the monoclonal antibody, or antigen-binding fragment thereof, comprises three light chain complementarity determining regions (LCDRs 1-3) and three heavy chain complementarity determining regions (HCDRs 1-3),
wherein:
LCDR1 comprises the amino acid sequence according to SEQ ID NO:1;
LCDR 2 comprises the amino acid sequence according to SEQ ID NO:2;
LCDR 3 comprises the amino acid sequence according to SEQ ID NO:3;
HCDR 1 comprises the amino acid sequence according to SEQ ID NO:4;
HCDR 2 comprises the amino acid sequence according to SEQ ID NO:5; and
HCDR 3 comprises the amino acid sequence according to SEQ ID NO:6.
2. The monoclonal antibody, or antigen-binding fragment thereof according to claim 1 , comprising a light chain variable region (VL) and a heavy chain variable region (VH), wherein the VL and the VH are encoded by nucleic acids selected from the group consisting of:
SEQ ID NO:32 and SEQ ID NO:82;
SEQ ID NO:33 and SEQ ID NO:83;
SEQ ID NO:34 and SEQ ID NO:84;
SEQ ID NO:35 and SEQ ID NO:85;
SEQ ID NO:36 and SEQ ID NO:86;
SEQ ID NO:37 and SEQ ID NO:87;
SEQ ID NO:38 and SEQ ID NO:88;
SEQ ID NO:39 and SEQ ID NO:89;
SEQ ID NO:40 and SEQ ID NO:90;
SEQ ID NO:41 and SEQ ID NO:91;
SEQ ID NO:42 and SEQ ID NO:92;
SEQ ID NO:43 and SEQ ID NO:93;
SEQ ID NO:44 and SEQ ID NO:94;
SEQ ID NO:45 and SEQ ID NO:95;
SEQ ID NO:46 and SEQ ID NO:96;
SEQ ID NO:47 and SEQ ID NO:97;
SEQ ID NO:48 and SEQ ID NO:98;
SEQ ID NO:49 and SEQ ID NO:99;
SEQ ID NO:50 and SEQ ID NO:100;
SEQ ID NO:51 and SEQ ID NO:101;
SEQ ID NO:52 and SEQ ID NO:102;
SEQ ID NO:53 and SEQ ID NO:103;
SEQ ID NO:54 and SEQ ID NO:104;
SEQ ID NO:55 and SEQ ID NO:105; and
SEQ ID NO:56 and SEQ ID NO:106.
3. The monoclonal antibody, or antigen-binding fragment thereof according to claim 1 , comprising a heavy chain having an amino acid sequence of SEQ ID NO: 109 and a light chain having an amino acid sequence of SEQ ID NO: 107.
4. The monoclonal antibody, or antigen-binding fragment thereof according to claim 1 , comprising a heavy chain encoded by the nucleic acid sequence of SEQ ID NO: 110 and a light chain encoded by the nucleic acid sequence of SEQ ID NO: 108.
5. The monoclonal antibody, or antigen-binding fragment thereof of claim 1 , which comprises a light chain variable region (VL) and a heavy chain variable region (VH), wherein the VL and the VH comprise, respectively, amino acid sequences selected from among the following combinations of VLs and VHs:
SEQ ID NO:7 and SEQ ID NO:57;
SEQ ID NO:8 and SEQ ID NO:58;
SEQ ID NO:9 and SEQ ID NO:59;
SEQ ID NO:10 and SEQ ID NO:60;
SEQ ID NO:11 and SEQ ID NO:61;
SEQ ID NO:12 and SEQ ID NO:62;
SEQ ID NO:13 and SEQ ID NO:63;
SEQ ID NO:14 and SEQ ID NO:64;
SEQ ID NO:15 and SEQ ID NO:65;
SEQ ID NO:16 and SEQ ID NO:66;
SEQ ID NO:17 and SEQ ID NO:67;
SEQ ID NO:18 and SEQ ID NO:68;
SEQ ID NO:19 and SEQ ID NO:69;
SEQ ID NO:20 and SEQ ID NO:70;
SEQ ID NO:21 and SEQ ID NO:71;
SEQ ID NO:22 and SEQ ID NO:72;
SEQ ID NO:23 and SEQ ID NO:73;
SEQ ID NO:24 and SEQ ID NO:74;
SEQ ID NO:25 and SEQ ID NO:75;
SEQ ID NO:26 and SEQ ID NO:76;
SEQ ID NO:27 and SEQ ID NO:77;
SEQ ID NO:28 and SEQ ID NO:78;
SEQ ID NO:29 and SEQ ID NO:79;
SEQ ID NO:30 and SEQ ID NO:80; and
SEQ ID NO:31 and SEQ ID NO:81.
6. The monoclonal antibody, or antigen-binding fragment thereof of claim 1 , which is chimeric or humanized.