Vorapaxar，5MG，SML3834-5MG，Sigma

Biochem/physiol Actions

Orally active, potent and selective thrombin receptor (PAR-1) antagonist with anti-platelet aggregation efficacy in vitro and in vivo.
Vorapaxar (MK-5348; SCH 530348) is an orally active, potent and selective thrombin receptor (PAR-1) antagonist with good selectivity over a panel of GPCRs, ion channels, and receptors, including PAR-2, PAR-3 and PAR-4. Vorapaxar inhibitis thrombin-induced calcium transient and thymidine incorporation in human coronary artery smoothmuscle cells (HCASMC; Ki = 1.1 and 13 nM, respectively), as well as aggregation in human platelet-rich plasma (PRP) induced by 10 nM thrombin or 15 μM haTRAP (IC50 = 47 and 25 nM, respectively), but not 20 μM ADP or 5 μM collagen. Oral administration (0.1 mg/kg to cynomolgus monkeys) prevents haTRAP-induced platelet aggregation ex vivo.