Cu/Zn Superoxide Dismutase and Catalase of Yangtze Sturgeon, Acipenser dabryanus: Molecular Cloning, Tissue Distribution and Response to Fasting and Refeeding
文献类型： 外文期刊
作者： Shi, Qingchao 1 ; Xiong, Xiaoqin 1 ; Wen, Zhengyong 1 ; Qin, Chuanjie 1 ; Li, Rui 1 ; Zhang, Zhiyong 1 ; Gong, Quan 2 ; Wu, Xiaoyun 2 ;
作者机构： 1.Neijiang Normal Univ, Key Lab Sichuan Prov Fishes Conservat & Utilizat, Neijiang 641000, Peoples R China
2.Sichuan Acad Agr Sci, Fishery Inst, Chengdu 611730, Peoples R China
关键词： Yangtze sturgeon; Cu; Zn-SOD; CAT; fasting; refeeding
期刊名称：FISHES （ 影响因子：3.17； 五年影响因子：3.098 ）
ISSN：
年卷期： 2022 年 7 卷 1 期
页码：
收录情况： SCI
摘要： Superoxide dismutase and catalase are two major antioxidant enzymes in the fish antioxidant defense system, which can remove excess reactive oxygen species and protect fish from stress-induced oxidative damage. The present study aimed to clone the sequences of Yangtze sturgeon, Acipenser dabryanus, Cu/Zn superoxide dismutase (AdCu/Zn-SOD) and catalase (AdCAT), and to explore changes of gene expression in the liver and intestine during fasting and refeeding. A total of 120 fish were exposed to four fasting and refeeding protocols (fasting for 0, 3, 7, or 14 d and then refeeding for 14 d). The coding sequences of AdCu/Zn-SOD and AdCAT encoded 155 and 526 amino acid proteins, respectively, both of which were expressed mainly in the liver. During fasting, when compared to the control group, liver AdCu/Zn-SOD expression was significantly higher in the 3- and 14-d groups, whereas its intestinal expression increased significantly only in the 7-d group. Liver AdCAT expression increased significantly in the 3-, 7-, and 14-d groups. During refeeding, liver AdCu/Zn-SOD expression increased significantly in the 3-, 7-, and 14-d groups compared with those in the control group. Similarly, intestinal AdCu/Zn-SOD expression increased significantly in the 3- and 7-d groups. Moreover, intestinal AdCAT expression was significantly higher in the 3-d group than in the control group, but decreased significantly in the 14-d group. Our findings indicated that AdCu/Zn-SOD and AdCAT play important roles in protecting fish against starvation-induced oxidative stress. Yangtze sturgeon exhibited the potential to adapt to a starvation and refeeding regime.
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