吡啶硫酮金属对华美盘管虫抗氧化性的影响Effect of Metal Pyrithione on Antioxidant Activity in Hydroides elegans
陈新;覃宗敏;李紫薇;王超超;商群;唐敏;
摘要(Abstract):
我国近岸局部海域的重金属污染严重威胁着生态环境和人类健康。吡啶硫酮铜(CuPT)和吡啶硫酮锌(ZnPT)在海洋防污和化工产品中的应用近来逐年增加,对其生态毒性及其机理进行研究迫在眉睫。本文以我国南海常见多毛类——华美盘管虫(Hydroides elegans Haswell)为受试生物,研究了CuPT和ZnPT对华美盘管虫的抗氧化系统的影响。试验结果表明在CuPT和ZnPT胁迫下,华美盘管虫体内的超氧化物歧化酶(SOD)、过氧化氢酶(CAT)和谷胱甘肽还原酶(GR)的活性,以及还原型谷胱甘肽含量(GSH)和丙二醛(MDA)含量发生与暴露毒物种类、浓度和时间相关的变化。SOD、CAT和GR的活性在较低浓度(25μg·L~(-1))的CuPT胁迫6 h后呈显著上升趋势,但随暴露时间延长(12 h和24 h),GR的活性显著下降;而暴露于较低浓度(50μg·L~(-1))的Zn PT中,仅SOD活性显著升高,CAT和GR的活性都显著下降。在较高Cu PT(100μg·L~(-1))或Zn PT(200μg·L~(-1))浓度中,CAT和GR的活性都显著下降。GSH含量对Cu PT或Zn PT胁迫的响应呈现明显的时间效应,即随暴露时间的延长,通常由显著上升转为显著下降。MDA含量在Cu PT(100μg·L~(-1))或Zn PT(200μg·L~(-1))高浓度组中呈显著升高趋势。
关键词(KeyWords): 吡啶硫酮金属;华美盘管虫;氧化损伤;抗氧化酶;脂质过氧化
基金项目(Foundation): 国家自然科学基金项目(31160098,31360105,31660128);; 海南省自然科学基金项目(313104);; 海南大学博士科研启动基金项目(kyqd1046)
作者(Author): 陈新;覃宗敏;李紫薇;王超超;商群;唐敏;
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