Recombinant Human Cyclophilin A in vitro Inhibits the Formation of Fibrin Clot

The chemotactic properties of cyclophilin A are well-known. There exists however a poor level of understanding regarding the hemostatic effects of this protein. Herein it is shown that recombinant human cyclophilin A (rhСyA), in contrast to the granulocyte colony-stimulating factor, is capable of inhibitingin vitrothe formation of a fibrin clot, thereby violating the spatial dynamics of clot growth; this effect is transient and dose-independent. Furthermore, the hypothesis that the conformational changes in the thrombin-rhCyA complex may mediate the anticoagulant effect of rhCyA on the autowave processes of blood clotting is postulated.