Enantioselective metabolism and toxic effects of metalaxyl on primary hepatocytes from rat

文献类型： 外文期刊

第一作者： Wang, Xinru

作者： Wang, Xinru;Zhu, Wentao;Zhang, Ping;Wang, Yao;Zhou, Zhiqiang;Qiu, Jing

作者机构：

关键词： Oxidative damage;Cytotoxicity;Hepatocyte;Stereoselectivemetabolism;Metalaxyl enantiomers;Metabolite

期刊名称：ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH （ 影响因子：4.223； 五年影响因子：4.306 ）

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收录情况： SCI

摘要： Enantiomers of chiral compounds often exhibit enantioselective adverse effects and biochemical processes in non-target organisms. In this study, enantioselective metabolism and toxic effects of metalaxyl enantiomers on primary rat hepatocytes were investigated. Stereoselectivity was observed on both degradation of metalaxyl and formation of metabolites. (-)-R-metalaxyl eliminated faster than (+)-S-metalaxyl, while the hydroxylmetalaxyl, demethylmetalaxyl, and didemethylmetalaxyl metabolites derived from 50-mu M (+)-S-metalaxyl after 24 h of incubation were approximately 1.57, 1.43, and 1.86 times more than that of (-)-R-metalaxyl, respectively. According to the methyl tetrazolium (MTT) assay, the EC50 values (24 h) for rac-, (+)-S-, and (-)-R-metalaxyl were 1788.22, 2066.73, and 2263.71 mu M, respectively. An accordant enantioselective effect on oxidative stress suggested that the enantioselective cytotoxicity induced by metalaxyl enantiomers may partly contribute to enantioselective oxidative damage and mitochondrial dysfunction. Such results could be of great importance for credible environmental and toxicological risk assessment of metalaxyl.

分类号： X5`X

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