Ecological threat caused by malathion and its chiral metabolite in a honey bee-rape system: Stereoselective exposure risk and the mechanism revealed by proteome

文献类型： 外文期刊

第一作者： Tong, Zhou

作者： Tong, Zhou;Shen, Yan;Meng, DanDan;Yi, XiaoTong;Sun, MingNa;Dong, Xu;Chu, Yue;Duan, JinSheng;Tong, Zhou;Meng, DanDan;Yi, XiaoTong;Sun, MingNa;Dong, Xu;Chu, Yue;Duan, JinSheng;Dong, Xu

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关键词： Malathion; Metabolite; Stereoselective exposure risk; Mechanism; Proteome

期刊名称：SCIENCE OF THE TOTAL ENVIRONMENT （ 影响因子：9.8； 五年影响因子：9.6 ）

ISSN： 0048-9697

年卷期： 2023 年 874 卷

页码：

收录情况： SCI

摘要： Honey bees play an important role in the ecological environment. Regrettably, a decline in honey bee colonies caused by chemical insecticides has occurred throughout the world. Potential stereoselective toxicity of chiral insecticides may be a hidden source of danger to bee colonies. In this study, the stereoselective exposure risk and mechanism of malathion and its chiral metabolite malaoxon were investigated. The absolute configurations were identified using an electron circular dichroism (ECD) model. Ultrahigh-performance liquid chromatography-tandem mass spectrometry (UPLC-MS/MS) was used for chiral separation. In pollen, the initial residues of malathion and malaoxon enantiomers were 3571-3619 and 397-402 mu g/kg, respectively, and R-malathion degraded relatively slowly. The oral LD50 values of R-malathion and S-malathion were 0.187 and 0.912 mu g/bee with 5 times difference, respectively, and the malaoxon values were 0.633 and 0.766 mu g/bee. The Pollen Hazard Quotient (PHQ) was used to evaluate exposure risk. R-malathion showed a higher risk. An analysis of the proteome, including Gene Ontology (GO), Kyoto Encyclopedia of Genes and Genomes (KEGG), and subcellular localization, indicated that energy metabolism and neurotransmitter transport were the main affected pathways. Our results provide a new scheme for the evaluation of the stereoselective exposure risk of chiral pesticides to honey bees.

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