代谢
阿那曲唑主要通过肝脏的氧化和葡萄糖醛酸化代谢成多种无活性代谢物,包括羟基阿那曲唑(游离型和葡萄糖醛酸化型)和阿那曲唑葡萄糖醛酸苷。羟基阿那曲唑的氧化主要是由CYP3A4(以及较少程度的CYP3A5和CYP2C8)催化的,而阿那曲唑的直接葡萄糖醛酸化似乎主要由UGT1A4催化。阿那曲唑还可能经历N-脱烷基化反应,形成三唑和3,5-双-(2-甲基丙酮腈基)-苯甲酸。阿那曲唑的标签上指出,在给药后血浆中的主要代谢物是三唑,但最近的一项药代动力学研究未能体外检测到任何N-脱烷基化产物。
Anastrozole is primarily metabolized in the liver via oxidation and glucuronidation to a number of inactive metabolites, including hydroxyanastrozole (both free and glucuronidated) and anastrozole glucuronide. Oxidation to hydroxyanastrozole is catalyzed predominantly by CYP3A4 (as well as CYP3A5 and CYP2C8, to a lesser extent) and the direct glucuronidation of anastrozole appears to be catalyzed mainly by UGT1A4. Anastrozole may also undergo N-dealkylation to form triazole and 3,5-Bis-(2-methylpropiononitrile)-benzoic acid. Labels for anastrozole state the main metabolite found in plasma following administration is triazole, but a recent pharmacokinetic study was unable to detect any products of N-dealkylation _in vitro_.
来源:DrugBank