生物信息学
细胞色素P450
氯氰菊酯
类固醇
药理学
生物
体内
化学
激素
生物化学
基因
酶
遗传学
农学
杀虫剂
作者
Quan Zhang,Shuqing Yu,Xiaoyang Chen,Lili Fu,Wei Dai,Sijia Gu
标识
DOI:10.1016/j.jhazmat.2021.125389
摘要
Despite the ubiquity of cypermethrin (CYP) stereoisomers in environment biota, the stereoisomeric selectivity of endocrine-disrupting potency of α-CYP, β-CYP, and θ-CYP has not been well studied. In this study, dual-luciferase reporter gene assays were adopted to analyze their potential endocrine-disrupting effects via four receptors (ERα, GRα, MR and RXR). The results showed that α-CYP was antagonistic to ERα, GRα, and MR with RIC20 of 9.1 × 10−7, 7.6 × 10−7, and 1.0 × 10−6 M, respectively. β-CYP exhibited only ERα-mediated agonistic activity with a REC20 of 2.1 × 10−6 M. None of the CYP stereoisomers interacted with RXR. Molecular docking indicated that α-CYP had the strongest binding capacity to GRα among the compounds. The expression levels of steroid hormone-related genes in human adrenocortical carcinoma (H295R) cells displayed that all three compounds inhibited the transcription of 3-βHSD, indicating the block of turning cholesterol into different hormones. Both α-CYP and β-CYP upregulated genes encoding estrogen- and aldosterone-forming enzymes including 17-βHSD, CYP19, STAR, and CYP11B2. Mortality and malformation toxicity assays in zebrafish embryos revealed that the order of toxicity was α-CYP > β-CYP > θ-CYP. Our results indicated that α-CYP may pose the strongest endocrine-disrupting effects. The data provided here will be helpful to systematically understand stereoisomeric selectivity in the endocrine-disrupting effects of cypermethrin.
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