肝微粒体和肝S9转化藜芦酸葡萄糖酯比较研究

2017-12-06 02:52:55乔姗姗郑时奇方明月师朵芝李德利王腾宇王如峰
中国中医药信息 2017年12期

乔姗姗+郑时奇+方明月+师朵芝+李德利+王腾宇+王如峰

摘要:目的 比较2种体外肝代谢模型转化藜芦酸葡萄糖酯的转化样式和转化率差异。方法 通过大鼠肝微粒体和肝S9体外转化模型对藜芦酸葡萄糖酯进行生物转化,采用HPLC检测转化底物及产物的含量,检测波长254 nm,流动相为乙腈(A)-1%乙酸溶液(B),梯度洗脱(0~6 min,5%~40%A;6~9 min,40%~50%A;9~11 min,50%~5%A),流速1.0 mL/min。结果 2种模型均可将藜芦酸葡萄糖酯转化为藜芦酸,但应用肝S9模型得到的代谢产物多于肝微粒體模型,且肝S9模型对酯类的转化率高于肝微粒体模型。结论 肝S9模型对酯类的转化能力高于肝微粒体模型。

关键词:藜芦酸葡萄糖酯;藜芦酸;肝微粒体;肝S9

DOI:10.3969/j.issn.1005-5304.2017.12.015

中图分类号:R285.6 文献标识码:A 文章编号:1005-5304(2017)12-0060-04

Comparative Study on Transformation of Tecomin by Using Liver Microsomes and Liver S9 QIAO Shan-shan, ZHENG Shi-qi, FANG Ming-yue, SHI Duo-zhi, LI De-li, WANG Teng-yu, WANG Ru-feng (School of Life Sciences, Beijing University of Chinese Medicine, Beijing 100102, China)

Abstract: Objective To compare the difference of transformation profile and transformation rate of tecomin by using two in vitro liver metabolism models. Methods Liver microsomes and liver S9 fraction models were employed to transform tecomin. HPLC was used to determine the contents of tecomin and its metabolites at the detecting wavelength of 254 nm. The gradient elution (0–6 min, 5%–40% A; 6–9 min, 40%–50% A; 9–11 min, 50%–5% A) was carried out by using mobile phase of acetonitrile (A) - 1% acetic acid (B) at a flow rate of 1 mL/min. Results Both models could transform tecomin into veratric acid; however, the metabolites obtained with liver S9 were more than those obtained with liver microsomes, and the transformation rate of the former was higher than that of the latter. Conclusion The liver S9 fraction can more efficiently transform esters than liver microsomes.

Key words: tecomin; veratric acid; liver microsomes; liver S9 fraction

肝脏是药物代谢的重要器官,是机体进行生物转化的主要场所。以肝脏为基础的体外代谢模型以其特有的优势在药物代谢研究中得到广泛应用。肝微粒体和肝S9是2种常用的模拟药物肝代谢的体外模型。肝S9是将肝组织匀浆后,经9000 r/min离心所得的上清液,可在肝微粒体的早期制备阶段获得,含有微粒体和胞质分数,含有生物转化Ⅰ相反应所需的CYP450酶类和Ⅱ相代谢酶(如葡萄糖酸转移酶、甲基转移酶、硫酸转移酶、乙酰基转移酶等)和其他的一些氧化酶和脱氢酶,如负责酒精代谢的乙醛脱氢酶

基金项目:北京市自然科学基金面上项目(7172129)

通讯作者:王如峰,E-mail:wangrufeng@tsinghua.org.cn

等[1-2]。与肝S9不同,肝微粒体只含有内质网亚细胞分数,包括负责药物代谢的CYP450酶和极少量的Ⅱ相代谢酶[3-4]。既然二者所含的代谢酶存在差异,它们对药物的代谢是否存在差异值得关注。……

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