Application of chemical P-450 model systems to study drug metabolism. III. Metabolism of 3-isobutyryl-2-isopropylpyrazolo(1,5-a)pyridine.
作者:Yoshio NAGATSU、Tsunehiko HIGUCHI、Masaaki HIROBE
DOI:10.1248/cpb.38.400
日期:——
Oxidation of 3-isobutyryl-2-isopropylpyrazolo[1, 5-α]pyridine (IBPP) was carried out with various chemical model systems for cytochrome P-450 in comparison with the liver microsomal system of rats or humans. α-Hydroxylation of side chains and ring hydroxylation at the 6 and 7 positions were the main reactions in both systems. A pattern analysis of products using two dimensional thin layer chromatography was employed to compare the functions of the chemical model systems with those of microsomal systems. The reaction profile of IBPP by the catalyst/Pt-colloid/H2, O2 system was most similar to that of human or rat microsomal system. The utility of these chemical models is discussed from the viewpoint of drug metabolism.
采用多种化学模型系统模拟细胞色素 P-450,并与大鼠或人的肝微粒体系统进行比较,研究了3-异丁酰基-2-异丙基吡唑[1,5-α]吡啶(IBPP)的氧化反应。侧链的α-羟基化和6、7位环羟基化是这两个系统的主要反应。采用二维薄层色谱对产物进行图谱分析,比较了化学模型系统和微粒体系统的功能。催化剂/Pt-胶体/H2,O2系统催化IBPP的反应历程与大鼠或人肝微粒体系统最相似。根据药物代谢的观点讨论了这些化学模型的用途。