Effects of steric hindrance and electron density of ester prodrugs on controlling the metabolic activation by human carboxylesterase
作者:Masato Takahashi、Ibuki Hirota、Tomoyuki Nakano、Tomoyuki Kotani、Daisuke Takani、Kana Shiratori、Yura Choi、Masami Haba、Masakiyo Hosokawa
DOI:10.1016/j.dmpk.2021.100391
日期:2021.6
hCE1, a phenyl ester type that is more easily metabolized by hCE1 than by hCE2, and a carbonate ester type that is easily metabolized by both hCE1 and hCE2. The hydrolytic rate of 1-methylpentyl (hexan–2–yl) ester was 10–times lower than that of 4–methylpentyl ester in hCE1 solution. hCE2 was susceptible to electron density of the substrate, and there was a difference in the hydrolysis rate of up to 3
羧酸酯酶(CES)在酯类药物和前药的水解代谢中起重要作用。在这项研究中,我们通过关注酯结构的空间位阻和电子密度来研究 hCE1 水解速率的变化。对于 26 种合成的吲哚美辛前药,在人肝微粒体 (HLM)、人小肠微粒体 (HIM)、hCE1 和 hCE2 存在下测量了水解率。合成的前药分为三种类型:由hCE1特异性代谢的烷基酯型,比hCE2更容易被hCE1代谢的苯酯型,以及易于被hCE1和hCE2代谢的碳酸酯型。在 hCE1 溶液中,1-甲基戊基(己-2-基)酯的水解速率比 4-甲基戊基酯的水解速率低 10 倍。对溴苯酯和对乙酰苯酯。通过改变烷氧基的位阻和电子密度,阐明了改变CES水解速率的因素。