代谢
醋酸赛格司酮在肝脏中迅速代谢和失活。根据体外实验的发现,血清中的主要氧化代谢物包括5α-二氢-和17α-羟基-5α-二氢代谢物,这些代谢物相对于醋酸赛格司酮的暴露量约占50%。这些代谢物在药理学上不活跃,对孕酮受体的EC50(半最大效应浓度)比母体化合物高10倍。研究表明,3α, 5α-四氢醋酸赛格司酮在大脑中的GABA-A受体上作为激活剂。
Segesterone acetate undergoes rapid metabolism and inactivation in the liver. Based on the findings _in vitro_, the major oxidative metabolites in the serum include 5α-dihydro- and 17α-hydroxy-5α-dihydro metabolites constitute about 50% of exposure relative to segesterone acetate. The metabolites are not pharmacologically active with EC50 to progesterone receptor 10-fold higher than that of the parent compound. It was shown that 3α, 5α-tetrahydrosegesterone acetate acts as an activator at the GABA-A receptors in the brain.
来源:DrugBank