Daboxin P, a phospholipase A 2 of Indian Daboia russelii venom, modulates thrombin-mediated platelet aggregation

Daboxin P, reported earlier from the venom of Daboia russellii, disturbs the blood coagulation cascade by targeting factor X and factor Xa. The present study exhibits that Daboxin P also inhibits platelet aggregation induced by various agonists. The thrombin-induced platelet aggregation was inhibite...

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Published in:Journal of biochemical and molecular toxicology 2023-11, Vol.37 (11), p.e23476
Main Authors: Yasmin, Rafika, Chanchal, Shankar, Ashraf, Mohammad Zahid, Doley, Robin
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creator Yasmin, Rafika
Chanchal, Shankar
Ashraf, Mohammad Zahid
Doley, Robin
description Daboxin P, reported earlier from the venom of Daboia russellii, disturbs the blood coagulation cascade by targeting factor X and factor Xa. The present study exhibits that Daboxin P also inhibits platelet aggregation induced by various agonists. The thrombin-induced platelet aggregation was inhibited maximum whereas inhibition of collagen-induced platelet aggregation was found to be 50% and no inhibition of adenosine diphosphate (ADP) and arachidonic acid-induced aggregation was observed. Daboxin P dose-dependently inhibited the thrombin-induced platelet aggregation with Anti-Aggregation 50 (AD ) dose of 55.166 nM and also reduced the thrombin-mediated calcium influx. In-silico interaction studies suggested that Daboxin P binds to thrombin and blocks its interaction with its receptor on the platelet surface. Quenching of thrombin's emission spectrum by Daboxin P and electrophoretic profiles of pull-down assay further reveals the binding between Daboxin P and thrombin. Thus, the present study demonstrates that Daboxin P inhibits thrombin-induced platelet aggregation by binding to thrombin.
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title Daboxin P, a phospholipase A 2 of Indian Daboia russelii venom, modulates thrombin-mediated platelet aggregation
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