Abstract
Thrombin is a potent platelet agonist that acts through protease-activated receptors (PARs) on platelet surface. PAR-1 is considered the main thrombin receptor in human platelets, while the roles of PAR-4 are not completely understood. Vorapaxar is the most widely studied PAR-1 antagonist and is the first in its class to be approved for clinical use, with indication for secondary prevention of recurrent ischemic events in patients with previous myocardial infarction or peripheral artery disease. In the chapter we will review the peculiar mechanism of action of PARs, their roles in hemostasis and thrombosis, and the pharmacology of vorapaxar. We will also review the main clinical data with special attention on the delicate balance between prevention of thrombosis and risk of bleeding.
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GuimarĂ£es, P.O., Tricoci, P. (2017). PAR Antagonists. In: Gresele, P., Kleiman, N., Lopez, J., Page, C. (eds) Platelets in Thrombotic and Non-Thrombotic Disorders. Springer, Cham. https://doi.org/10.1007/978-3-319-47462-5_87
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DOI: https://doi.org/10.1007/978-3-319-47462-5_87
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