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Ecotoxocological effects of short-term exposure to a human pharmaceutical Verapamil in juvenile rainbow trout (Oncorhynchus mykiss)

文献类型： 外文期刊

作者： Li, Zhi-Hua 1 ; Li, Ping 1 ; Randak, Tomas 1 ;

作者机构： 1.Univ S Bohemia Ceske Budejovice, Fac Fisheries & Protect Waters, Res Inst Fish Culture & Hydrobiol, Vodnany 38925, Czech Republic

2.Chinese Acad Fishery Sci, Yangtze River Fisheries Res Inst, Jinzhou 434000, Peoples R China

关键词： Lethal concentration;Behavior alteration;Oxidative stress;RNA/DNA ratio;Calcium antagonist

期刊名称：COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY C-TOXICOLOGY & PHARMACOLOGY （ 影响因子：3.228； 五年影响因子：3.289 ）

ISSN： 1532-0456

年卷期： 2010 年 152 卷 3 期

页码：

收录情况： SCI

摘要： Verapamil (VRP) is a calcium channel blocker that is a highly prescribed compound and commonly present in aquatic environment, but the ecotoxicological effects of this pharmaceutical in fish have not been fully documented. In this study, the toxic effects of VRP were studied in juvenile rainbow trout, Oncorhynchus mykiss, by acute static bioassay. In the acute test, the median lethal concentration (LC50, 2.72 mg/L) was evaluated and the behavioral changes were obviously intensified with increasing VRP concentrations. Compared to the control, oxidative stress was observed in fish tissues with different levels after short-term exposure to sublethal concentrations (0.27 and 1.35 mg/L) of VRP. Activities of SOD and GPx in fish brain were induced at 0.27 mg/L VRP, but all the antioxidant enzymes (SOD, GPx and GR) in fish brain were decreased at 1.35 mg/L VRP. When compared to the control, all the antioxidant enzymes in gill were decreased in both treated groups, but there was no significant change in muscle. Additional, muscle DNA/RNA ratio in fish exposed at 1.35 mg/L VRP was significantly lower than that in the control. Furthermore, through chemometrics of all parameters measured in fish exposed to sublethal VRP concentrations using principal component analysis, two groups with 89.8% of total accumulated variance were distinguished. In short, the physiological and biochemical responses in of fish indicated that VRP-induced environmental stress: but according to VRP residual status in the natural environment, more long-term experiments at lower concentrations will be necessary in the future. (C) 2010 Elsevier Inc. All rights reserved.

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