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Transfusion of blood components and factor concentrates is clinically used to replenish clotting factors and treat coagulopathy after injury when bleeding is severe. Alternatively, direct manipulation of fibrin polymerization via synthetic cross-linking agents may also improve clot formation during coagulopathic conditions as a novel way to treat coagulopathy. We recently developed a synthetic hemostatic polymer, PolySTAT, that promotes clot formation and stabilizes fibrin network structure by cross-linking fibrin monomers. In this study, we used rotational thromboelastometry (ROTEM) to monitor the effect of PolySTAT on the mechanical strength of clots during clot formation and breakdown in comparison to replacement clotting factors and antifibrinolytics under conditions of simulated trauma-induced coagulopathy (sTIC). Human recombinant activated Factor VII (rFVIIa) shortened clotting onset time and accelerated clotting rate, while tranexamic acid (TXA) eliminated clot lysis and restored maximal clot firmness.In contrast, fibrinogen and PolySTAT were both able to speed up clot formation, increase maximal firmness, and inhibit clot lysis. Furthermore, PolySTAT acted synergistically with TXA and fibrinogen, enhancing their individual effects on clot formation. Thus, manipulating fibrin clot structure by physical cross-linking with a synthetic polymer has beneficial effects on clot formation and may be a viable transfusion strategy for treatment of coagulopathy.

A Fibrin Cross-linking Polymer Enhances Clot Formation Similar to Factor Concentrates and Tranexamic Acid in an in Vitro Model of Coagulopathy