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Assessing joint toxicity of four organophosphate and carbamate insecticides in common carp (Cyprinus carpio) using acetylcholinesterase activity as an endpoint

文献类型： 外文期刊

作者： Wang, Yanhua 1 ; Chen, Chen 2 ; Zhao, Xueping 1 ; Wang, Qiang 1 ; Qian, Yongzhong 2 ;

作者机构： 1.Zhejiang Acad Agr Sci, Inst Qual & Stand Agroprod, Minist Agr, Key Lab Pesticide Residue Detect,State Key Lab Br, Hangzhou 310021, Zhejiang, Peoples R China

2.Chinese Acad Agr Sci, Inst Qual Stand & Testing Technol Agroprod, Key Lab Agroprod Qual & Safety, Minist Agr, Beijing 100081, Peoples R China

关键词： Acetylcholinesterase;Cyprinus carpio;Combined toxicity;Risk assessment

期刊名称：PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY （ 影响因子：3.963； 五年影响因子：4.454 ）

ISSN：

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收录情况： SCI

摘要： Mixtures of organophosphate (OP) and carbamate (CB) pesticides are commonly detected in freshwater ecosystems. These pesticides inhibit the activity of acetylcholinesterase (AChE) and have potential to interfere with behaviors that may be essential for the survival of species. Although the effects of individual anticholinesterase insecticides on aquatic species have been studied for decades, the neurotoxicity of mixtures is still poorly understood. In the present study, brain AChE inhibition in carp (Cyprinus ccupio) exposed to a series of concentrations of the organophosphates (malathion and triazophos) as well as the carbamates (fenobucarb and carbosulfan) was measured. In equitoxic mixtures, the observed AChE activity inhibition of the malathion plus triazophos, and triazophos plus carbosulfan mixtures, was synergism. In equivalent concentration mixtures, the combination of malathion plus fenobucarb mixture conformed to synergism, while the observed AChE activity inhibition of the remaining pairings was less than additive. Single pesticide risk assessments are likely to underestimate the impacts of these insecticides on carps in aquatic environment where mixtures occur. Moreover, mixtures of pesticides that have been commonly reported in aquatic ecosystems may pose a more important challenge than previously anticipated. (C) 2014 Elsevier Inc. All rights reserved.

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