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Selenium-CulturedPotamogeton maackianusin the Diet Can Alleviate Oxidative Stress and Immune Suppression in Chinese Mitten Crab (Eriocheir sinensis) Under Copper Exposure

文献类型： 外文期刊

作者： Qiang, Jun 1 ; Duan, Xue-Jun 2 ; Zhu, Chuan-Kun 3 ; He, Jie 1 ; Bao, Jin-Wen 1 ; Tao, Yi-Fan 1 ; Zhu, Hao-Jun 1 ; Xu, Pao 1 ;

作者机构： 1.Chinese Acad Fishery Sci, Minist Agr, Key Lab Freshwater Fisheries & Germplasm Resource, Freshwater Fisheries Res Ctr, Wuxi, Jiangsu, Peoples R China

2.Wuxi Inst Technol, Adult Educ Coll, Wuxi, Jiangsu, Peoples R China

3.Huaiyin Normal Univ, Jiangsu Collaborat Innovat Ctr Reg Modern Agr & E, Huaian, Peoples R China

关键词： selenium; Chinese mitten crab (Eriocheir sinensis); Potamogeton maackianus; oxidative stress; immune regulation; Cu(2+)exposure

期刊名称：FRONTIERS IN PHYSIOLOGY （ 影响因子：4.566； 五年影响因子：4.804 ）

ISSN： 1664-042X

年卷期： 2020 年 11 卷

页码：

收录情况： SCI

摘要： Selenium (Se) is an essential trace element for aquatic animals. The aquatic plantPotamogeton maackianusis an important natural food of Chinese mitten crab (Eriocheir sinensis). The aim of this study was to determine whether the antioxidant and immune responses of Chinese mitten crab are affected by including Se-culturedP. maackianusin the diet. Three groups ofP. maackianuswere cultured at levels of 0.02 mg/kg Se, 8.83 mg/kg Se, and 16.92 mg/kg Se, and the plants in these groups were used in experimental diets fed to crabs (dietary Se content of 0.05, 0.43, and 0.82 mg/kg, respectively). Compared with crabs in the 0.05 mg/kg group, those in the 0.82 mg/kg group showed significantly increased specific growth rate, protease and lipase activities, triglyceride and cholesterol contents, and Se content in the hepatopancreas and muscle (P< 0.05); increased activities of glutathione peroxidase, glutathione reductase, and catalase in the antioxidant system; increased transcript levels ofMT(encoding metallothionein); and decreased malondialdehyde content (P< 0.05). At the end of the rearing experiment, the crabs in the different groups were exposed to copper (Cu2+) stress for 96 h. All the juvenile crabs in the 0.43 and 0.82 mg/kg groups survived 96 h of Cu(2+)stress. Crabs in the 0.82 mg/kg group showed enhanced antioxidant responses under Cu(2+)stress, increased transcript levels ofMTandLYZ, and increased resistance. Therefore, supplementation of the diet of Chinese mitten crab with increased levels of Se-culturedP. maackianuscan reduce oxidative stress under Cu(2+)exposure, activate the immune response, and benefit growth.

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