Attenuation of reperfusion injury
Modified annexin proteins, including a homodimer of human annexin V, are provided. Methods for their use, such as to prevent thrombosis without increasing hemorrhage, enhancing the survivability of platelets during storage or transfusion and to attenuate ischemia-reperfusion injury (IPI), are also provided. The modified annexins bind phosphatidylserine (PS) on cell surfaces, thereby preventing the assembly of the prothrombinase complex. The modified annexin decreases the binding of leukocytes and platelets during post-ischemic reperfusion, thereby restoring microvascular blood flow and decreasing organ damage. In addition, the modified annexin prevents lipid loss from platelets during storage.
1. A method of attenuating ischemia-reperfusion injury (IRI), said method comprising administering to a patient in need thereof a phosphatidylserine (PS) binding agent wherein the PS binding agent binds with high affinity to PS on cell surfaces, and wherein the PS binding agent is an isolated annexin at least 95% identical to a protein selected from the group consisting of SEQ ID NO: 6, SEQ ID NO: 26, SEQ ID NO: 27, SEQ ID NO: 19, SEQ ID NO: 23, SEQ ID NO: 3-linker-SEQ ID NO: 3, SEQ ID NO: 12-linker-SEQ ID NO: 12, and SEQ ID NO: 15-linker-SEQ ID NO: 15, SEQ ID NO: 3-linker-SEQ ID NO: 12, SEQ ID NO: 3-linker-SEQ ID NO: 15, SEQ ID NO: 12-linker-SEQ ID NO: 15, SEQ ID NO: 12-linker-SEQ ID NO: 3, SEQ ID NO: 15-linker-SEQ ID NO: 3 and SEQ ID NO: 15-linker-SEQ ID NO: 12,
wherein the linker is at least one glycine-serine sequence, and whereby said administering attenuates IRI.
2. The method of claim 1 , wherein the PS-binding agent inhibits the attachment of monocytes or platelets that express receptors for PS to ischemic or activated cells, and wherein the ischemic or activated cells express PS on their cell surface.
3. The method of claim 1 , wherein the PS-binding agent inhibits the attachment of enzymes that use PS as a docking site to ischemic or activated cells, wherein the ischemic or activated cells express PS on their cell surface and wherein the enzyme is secretory phospholipase A2 or a prothrombinase complex.
4. The method of claim 1 , wherein the IRI is caused by organ transplantation.
5. The method of claim 1 , wherein the IRI is caused by tissue grafting.
6. The method of claim 1 , wherein the IRI is caused by surgery in which the blood supply to the organ is reduced or cut off.
7. The method of claim 4 , wherein the PS-binding agent is administered to the patient up to about 6 hours prior to reperfusion.
8. The method of claim 4 , wherein the PS-binding agent is administered to the patient up to about 1 hour after reperfusion commences.
9. The method of claim 4 , wherein the IRI is caused by surgery cutting off and/or restricting blood flow and the PS-binding agent is administered to the patient within about 6 hours of the surgical procedure.
10. A method of attenuating ischemia reperfusion injury (IRI), said method comprising administering to an organ transplant recipient a composition comprising a phosphatidylserine (PS) binding agent, wherein the PS binding agent binds with high affinity to PS on cell surfaces, and wherein the PS binding agent is an isolated annexin at least 95% identical to a protein selected from the group consisting of SEQ ID NO: 6, SEQ ID NO: 26, SEQ ID NO: 27, SEQ ID NO: 19, SEQ ID NO: 23, SEQ ID NO: 3-linker-SEQ ID NO: 3, SEQ ID NO: 12-linker-SEQ ID NO: 12, and SEQ ID NO: 15-linker-SEQ ID NO: 15, SEQ ID NO: 3-linker-SEQ ID NO: 12, SEQ ID NO: 3-linker-SEQ ID NO: 15, SEQ ID NO: 12-linker-SEQ ID NO: 15, SEQ ID NO: 12-linker-SEQ ID NO: 3, SEQ ID NO: 15-linker-SEQ ID NO: 3 and SEQ ID NO: 15-linker-SEQ ID NO: 12,
wherein the linker is at least one glycine-serine sequence, and whereby said administering attenuates IRI.
11. A method of attenuating ischemia reperfusion injury (IRI), said method comprising administering to a stroke patient a composition comprising a phosphatidylserine (PS) binding agent wherein the PS binding agent binds with high affinity to PS on cell surfaces, and wherein the PS binding agent is an isolated annexin at least 95% identical to a protein selected from the group consisting of SEQ ID NO: 6, SEQ ID NO: 26, SEQ ID NO: 27, SEQ ID NO: 19, SEQ ID NO: 23, SEQ ID NO: 3-linker-SEQ ID NO: 3, SEQ ID NO: 12-linker-SEQ ID NO: 12, and SEQ ID NO: 15-linker-SEQ ID NO: 15, SEQ ID NO: 3-linker-SEQ ID NO: 12, SEQ ID NO: 3-linker-SEQ ID NO: 15, SEQ ID NO: 12-linker-SEQ ID NO: 15, SEQ ID NO: 12-linker-SEQ ID NO: 3, SEQ ID NO: 15-linker-SEQ ID NO: 3 and SEQ ID NO: 15-linker-SEQ ID NO: 12,
wherein the linker is at least one glycine-serine sequence, and whereby said administering attenuates IRI.
12. A method of attenuating ischemia reperfusion injury (IRI), said method comprising administering to a patient suffering from myocardial infarction a composition comprising a phosphatidylserine (PS) binding agent, wherein the PS binding agent binds with high affinity to PS on cell surfaces, and wherein the PS binding agent is an isolated annexin at least 95% identical to a protein selected from the group consisting of SEQ ID NO: 6, SEQ ID NO: 26, SEQ ID NO: 27, SEQ ID NO: 19, SEQ ID NO: 23, SEQ ID NO: 3-linker-SEQ ID NO: 3, SEQ ID NO: 12-linker-SEQ ID NO: 12, and SEQ ID NO: 15-linker-SEQ ID NO: 15, SEQ ID NO: 3-linker-SEQ ID NO: 12, SEQ ID NO: 3-linker-SEQ ID NO: 15, SEQ ID NO: 12-linker-SEQ ID NO: 15, SEQ ID NO: 12-linker-SEQ ID NO: 3, SEQ ID NO: 15-linker-SEQ ID NO: 3 and SEQ ID NO: 15-linker-SEQ ID NO: 12,
wherein the linker is at least one glycine-serine sequence, and whereby said administering attenuates IRI.
13. The method of claim 1 , wherein the isolated annexin is a protein selected from the group consisting of SEQ ID NO: 6, SEQ ID NO: 26, SEQ ID NO: 27, SEQ ID NO: 19, SEQ ID NO: 23, SEQ ID NO: 3-linker-SEQ ID NO: 3, SEQ ID NO: 12-linker-SEQ ID NO: 12, and SEQ ID NO: 15-linker-SEQ ID NO: 15, SEQ ID NO: 3-linker-SEQ ID NO: 12, SEQ ID NO: 3-linker-SEQ ID NO: 15, SEQ ID NO: 12-linker-SEQ ID NO: 15, SEQ ID NO: 12-linker-SEQ ID NO: 3, SEQ ID NO: 15-linker-SEQ ID NO: 3 and SEQ ID NO: 15-linker-SEQ ID NO: 12.
14. The method of claim 10 , wherein the isolated annexin is a protein selected from the group consisting of SEQ ID NO: 6, SEQ ID NO: 26, SEQ ID NO: 27, SEQ ID NO: 19, SEQ ID NO: 23, SEQ ID NO: 3-linker-SEQ ID NO: 3, SEQ ID NO: 12-linker-SEQ ID NO: 12, and SEQ ID NO: 15-linker-SEQ ID NO: 15, SEQ ID NO: 3-linker-SEQ ID NO: 12, SEQ ID NO: 3-linker-SEQ ID NO: 15, SEQ ID NO: 12-linker-SEQ ID NO: 15, SEQ ID NO: 12-linker-SEQ ID NO: 3, SEQ ID NO: 15-linker-SEQ ID NO: 3 and SEQ ID NO: 15-linker-SEQ ID NO: 12.