Bioaccumulation and physiological responses in juvenile Marsupenaeus japonicus exposed to cadmium

文献类型： 外文期刊

第一作者： Ren, Xianyun

作者： Ren, Xianyun;Wang, Xiang;Liu, Ping;Li, Jian;Ren, Xianyun;Wang, Xiang;Liu, Ping;Li, Jian;Wang, Xiang

作者机构：

关键词： Marsupenaeus japonicus; Cadmium; Bioaccumulation; Antioxidant system; Biomolecular damage; Apoptosis

期刊名称：AQUATIC TOXICOLOGY （ 影响因子：4.964； 五年影响因子：5.071 ）

ISSN： 0166-445X

年卷期： 2019 年 214 卷

页码：

收录情况： SCI

摘要： The heavy metal cadmium readily accumulates in organisms, causing damage. In this study, juvenile marine shrimp Marsupenaeus japonicus were exposed to cadmium (Cd2+; 5, 50 and 500 mu g L-1). Cd accumulation and antioxidant-related indices were determined, and damage to biomolecules was assessed, after 24, 48 and 96 h. Cd bioaccumulation in M. japonicus increased with exposure time and concentration, which reached the highest value at 96 h. The data showed that 5, 50 and 500 mu g L-1 Cd increased glutathione (GSH) content and the activities of superoxide dismutase (SOD) and glutathione S-transferase (GST) in a Cd-dose-dependent manner, but 5 and 50 mu g L-1 Cd had no effect on caspase-3 activity. The expression levels of SOD, GST, heat shock protein 70 (HSP70), metallothionein (MT), p.53 and caspase-3 genes were rapidly increased after 50 and 500 mu g L-1 Cd exposure, and remained at a significantly higher level than in the control after 96 h of exposure. After exposure to 5, 50 and 500 mu g L-1 Cd, F-value (the ratio between double-stranded DNA and total DNA) remained high at 24 h, however, as the exposure time increased, the F-value decreased in a dose-dependent manner. An increase in malondialdehyde content was also observed following exposure to 50 and 500 mu g L-1 Cd. Our data suggest that Cd induces oxidative stress, molecular damage and apoptosis in juvenile M. japonicus in a concentration- and time-dependent manner.

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