Upamostat

Upamostat (WX-671), a prodrug of WX-UK1, is an orally active serine protease inhibitor. Upamostat inhibits the urokinase-type plasminogen activator (uPA) system, blocking the plasminogen activation process mediated by it, thereby suppressing the invasion, migration and metastasis of tumor cells. Upamostat can be used in the research of metastatic breast cancer and locally advanced pancreatic cancer^[1]. IC50 & Target:Serine protease, uPA^[1] In Vitro:Upamostat is the urokinase plasminogen activator (uPA) inhibitor. Upamostat is the oral pro-drug of the active metabolite WX-UK1, a novel uPA inhibitor^[1]. Upamostat inhibits the urokinase-type plasminogen activator (uPA) system, which plays a major role in tumor invasion and metastasis. Upamostat is the orally available amidoxime- (i.e. hydroxyamidine-) prodrug of the pharmacologically active form, WX-UK1^[2]. In Vivo:The validated method is used to evaluate the pharmacokinetics of Upamostat (Mesupron) in rats. The mean plasma concentrations of Upamostat after a single intravenous injection of 2 mg/kg in five rats are measured. The substance decays in a mono-phasic pattern with a terminal half-life of 0.5 h; its volume of distribution is 2.0 L/kg, and clearance is about 2.7 L/h/kg^[3].