Abstract
Novel anticoagulant therapies target specific clotting factors in blood coagulation cascade. Inhibition of the blood coagulation through Factor VIII-Factor IX interaction represents an attractive approach for the treatment and prevention of diseases caused by thrombosis. Our research efforts are continued by the synthesis and biological evaluation of cyclic, head to tail peptides, analogs of the 558-565 sequence of the A2 subunit of FVIII, aiming at the efficient inhibition of Factor VIIIa-Factor IXa interaction. The analogs were synthesized on solid phase using the acid labile 2-chlorotrityl chloride resin, while their anticoagulant activities were examined in vitro by monitoring activated partial thromboplastin time and the inhibition of Factor VIII activity. The results reveal that these peptides provide bases for the development of new anticoagulant agents.
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