Effect of nitrite exposure on oxidative stress, DNA damage and apoptosis in mud crab (Scylla paramamosain)

文献类型： 外文期刊

第一作者： Cheng, Chang-Hong

作者： Cheng, Chang-Hong;Su, You-Lu;Ma, Hong-Ling;Deng, Yi-Qin;Feng, Juan;Chen, Xiao-Long;Jie, Yu-Kun;Guo, Zhi-Xun

作者机构：

关键词： Scylla paramamosain; Nitrite exposure; Oxidative stress; Apoptosis

期刊名称：CHEMOSPHERE （ 影响因子：7.086； 五年影响因子：6.956 ）

ISSN： 0045-6535

年卷期： 2020 年 239 卷

页码：

收录情况： SCI

摘要： Nitrite is one of major environmental pollutants that can impact immunological parameters in aquatic organisms. In the present study, we investigated the effects of nitrite exposure on oxidative stress, DNA damage and apoptosis in mud crab (Scylla paramamosain). Mud crab were exposed to 0, 5, 10 and 15 mg L-1 nitrite for 72 h. These data showed that acid phosphatase (ACP) and alkaline phosphatase (ALP) activity significantly decreased in treatments with various concentrations of nitrite (5, 10 and 15 mg L-1) after 24 and 48 h, while the levels of nitric oxide (NO) significantly increased in these treatments. Nitrite exposure could suppress superoxide dismutase (SOD) and catalase (CAT) activity, and increase the formation of malondialdehyde (MDA) after 48 and 72 h of exposure. In addition, nitrite exposure decreased total haemocyte counts after 48 and 72 h of exposure. Cytological damage, DNA damage and apoptosis was observed obviously at 72 h after nitrite exposure. Moreover, nitrite exposure significantly induced the mRNA levels of phosphorylated Jun N-terminal kinases UNK), and eventually activated p53 signaling and caspase-3. These results indicated that nitrite exposure could induce oxidative stress, which further caused DNA damage and apoptosis in mud crab. Our results will be helpful to understand the mechanism of nitrite toxicity on crustaceans. (C) 2019 Elsevier Ltd. All rights reserved.

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