代谢
Fostemsavir迅速被肠道腔内刷状缘膜上的碱性磷酸酶水解为其活性代谢物temsavir。Temsavir进一步转化为两种主要的无活性代谢物:BMS-646915,由酯酶水解产生,以及BMS-930644,通过CYP3A4氧化生成的N-脱烷基代谢物。大约36.1%的口服剂量通过酯酶代谢,21.2%通过CYP3A4代谢,少于1%在消除前通过UDP-葡萄糖醛酸基转移酶(UGT)进行结合。Temsavir及其两种主要代谢物均已知可抑制BCRP。
Fostemsavir is rapidly hydrolyzed to temsavir, its active metabolite, by alkaline phosphatase(s) present at the brush border membrane of the intestinal lumen. Temsavir undergoes further biotransformation to two predominant inactive metabolites: BMS-646915, a product of hydrolysis by esterases, and BMS-930644, an N-dealkylated metabolite generated via oxidation by CYP3A4. Approximately 36.1% of an administered oral dose is metabolized by esterases, 21.2% is metabolized by CYP3A4, and <1% is conjugated by UDP-glucuronosyltransferases (UGT) prior to elimination. Both temsavir and its two predominant metabolites are known to inhibit BCRP.
来源:DrugBank