Peptides that inhibit complement activation
View Patent ↗The present invention relates to compositions, including pharmaceutical compositions that inhibit complement activation, and contain amino acid sequences X 1 -X 2 -X 3 -W-E-X 4 -X 5 -X 6 and/or Z 1 -C 1 -Z 2 -P-Z 3 -Z 4 -C 2 -Z 5 as described. The invention further relates to methods of inhibiting complement activation in vivo or ex vivo by administering a pharmaceutical composition as described herein.
1. A composition comprising a polypeptide consisting of a sequence X 1 -X 2 -X 3 -W-E-X 4 -X 5 -X 6 , wherein:
E is a glutamic acid residue;
W is a tryptophan residue;
X 1 is a sequence of one to five amino acid residues;
X 2 is an amino acid residue selected from the group consisting of asparagine, alanine, glutamic acid, glycine, histidine, isoleucine, leucine, methionine, phenylalanine, proline, tryptophan, tyrosine and valine;
X 3 is arginine;
X 4 is phenylalanine or tyrosine;
X 5 is proline; and
X 6 is a sequence of one to five amino acid residues wherein the polypeptide has a total number of amino acid residues ranging from 8 to about 15.
2. The composition of claim 1 wherein X 1 is a glutamic acid residue.
3. The composition of claim 1 wherein X 6 is an amino acid residue.
4. The composition of claim 3 wherein X 6 is an acidic amino acid residue or a polar amino acid residue.
5. The composition of claim 4 wherein X 6 is a glutamic acid residue or a glutamine residue.
6. The composition of claim 1 wherein X 2 is selected from the group consisting of tryptophan, tyrosine, valine, threonine, isoleucine, alanine, glutamic acid, and leucine.
7. The composition of claim 6 wherein X 2 is selected from the group consisting of valine, threonine, and leucine.
8. The composition of claim 7 wherein X 2 is a valine residue.
9. The composition of claim 1 wherein X 4 is a phenylalanine residue.
10. The composition of claim 1 wherein X 5 is a proline residue.
11. The composition of claim 1 wherein the polypeptide has an amino-terminal acetyl group.
12. The composition of claim 1 wherein the polypeptide has a carboxy-terminal amide group.
13. The composition of claim 1 wherein the composition further comprises a pharmaceutically acceptable carrier, excipient, stabilizer, or diluent.
14. The composition of claim 1 wherein one or more of the following conditions are satisfied:
X 1 is a glutamic acid residue;
X 2 is a valine residue;
X 4 is a phenylalanine residue;
X 6 is a glutamic acid residue;
the polypeptide has an amino-terminal acetyl group;
the polypeptide has a carboxy-terminal amide group; or
the composition further comprises a pharmaceutically acceptable carrier, excipient, stabilizer, or diluent.
15. A composition comprising a polypeptide comprising a sequence selected from the group consisting of SEQ ID NO 7, SEQ ID NO 8, SEQ ID NO 13, SEQ ID NO 46, SEQ ID NO 50, SEQ ID NO 65, SEQ ID NO 66, SEQ ID NO 69, SEQ ID NO 73, SEQ ID NO 74, SEQ ID NO 76, SEQ ID NO 77, SEQ ID NO 78, SEQ ID NO 79, SEQ ID NO 80, SEQ ID NO 81, SEQ ID NO 82, SEQ ID NO 83, SEQ ID NO 84, SEQ ID NO 85, SEQ ID NO 86, SEQ ID NO 87, SEQ ID NO 88, SEQ ID NO 89, SEQ ID NO 90, SEQ ID NO 91, SEQ ID NO 92, SEQ ID NO 93, SEQ ID NO 94, SEQ ID NO 95, SEQ ID NO 96, SEQ ID NO 97, SEQ ID NO 103, SEQ ID NO 107, SEQ ID NO 108, SEQ ID NO 109, SEQ ID NO 110, SEQ ID NO 111, SEQ ID NO 112, SEQ ID NO 113, SEQ ID NO 114, SEQ ID NO 115, SEQ ID NO 116, SEQ ID NO 117, SEQ ID NO 118, SEQ ID NO 119, SEQ ID NO 120, and SEQ ID NO 121.
16. The composition of claim 15 wherein the polypeptide comprises a sequence selected from the group consisting of SEQ ID NO 46, SEQ ID NO 50, SEQ ID NO 66, SEQ ID NO 73, SEQ ID NO 74, SEQ ID NO 76, SEQ ID NO 78, SEQ ID NO 80, SEQ ID NO 81, SEQ ID NO 82, SEQ ID NO 83, SEQ ID NO 84, SEQ ID NO 90, SEQ ID NO 91, SEQ ID NO 93, SEQ ID NO 95, SEQ ID NO 107, SEQ ID NO 109, SEQ ID NO 112, SEQ ID NO 113, SEQ ID NO 115, SEQ ID NO 117, SEQ ID NO 119, and SEQ ID NO 120.
17. The composition of claim 16 wherein the polypeptide comprises a sequence selected from the group consisting of SEQ ID NO 73, SEQ ID NO 80, SEQ ID NO 81, SEQ ID NO 82, SEQ ID NO 83, SEQ ID NO 84, SEQ ID NO 90, SEQ ID NO 91, SEQ ID NO 93, SEQ ID NO 95, SEQ ID NO 107, SEQ ID NO 109, SEQ ID NO 112, SEQ ID NO 115, SEQ ID NO 117, SEQ ID NO 119, and SEQ ID NO 120.
18. The composition of claim 17 wherein the polypeptide comprises a sequence selected from the group consisting of SEQ ID NO 112, 115, 117, and 120.
19. The composition of claim 18 wherein the polypeptide comprises SEQ ID NO 112.
20. The composition of claim 15 wherein the composition further comprises a pharmaceutically acceptable carrier, excipient, stabilizer, or diluent.
21. A method of inhibiting complement activation comprising applying the composition of claim 1 to a surface of a medical device, or a surface of an organ before transplantation.
22. The method of claim 21 wherein the medical device is a stent.