代谢
阿帕鲁胺主要通过CYP2C8和CYP3A4介导的代谢转化为其药理活性的代谢物,N-去甲基阿帕鲁胺。CYP2C8和CYP3A4在阿帕鲁胺总代谢中的贡献大约为单次给药后的58%和13%,但在稳态时分别变化为40%和37%【FDA标签】。阿帕鲁胺对CYP3A4介导代谢的自身诱导可能解释了在稳态时CYP3A4酶活性的增加。基于系统暴露、相对效力和药代动力学特性,N-去甲基阿帕鲁胺可能对阿帕鲁胺的临床活性有所贡献【FDA标签】。
Apalutamide primarily undergoes CYP2C8 and CYP3A4-mediated metabolism to its pharmacologically active metabolite, N-desmethyl apalutamide. The contribution of CYP2C8 and CYP3A4 in the total metabolism of apalutamide is approximately 58% and and 13% following single dose but changes to 40% and 37%, respectively at steady-state [FDA Label]. The auto-induction of CYP3A4-mediated metabolism by apalutamide may explain the increase in CYP3A4 enzymatic activity at steady-state. Based on systemic exposure, relative potency, and pharmacokinetic properties, N-desmethyl apalutamide likely contributed to the clinical activity of apalutamide [FDA Label].
来源:DrugBank