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Cloning of the gene encoding acyl-CoA thioesterase 11 and its functional characterization in hybrid yellow catfish (Pelteobagrus fulvidraco female x Pelteobagrus vachelli male) under heat stress

文献类型： 外文期刊

作者： Zhang, Li 1 ; Qiang, Jun 1 ; Tao, Yi-Fan 1 ; Bao, Jing-Wen 2 ; Zhu, Hao-Jun 1 ; He, Jie 1 ; Xu, Pao 1 ;

作者机构： 1.Nanjing Agr Univ, Wuxi Fisheries Coll, 9 East Shanshui Rd, Wuxi 214081, Jiangsu, Peoples R China

2.Chinese Acad Fishery Sci, Freshwater Fisheries Res Ctr, Minist Agr, Key Lab Freshwater Fisheries & Germplasm Resource, Wuxi 214081, Jiangsu, Peoples R China

关键词： Hybrid yellow catfish; Heat stress; Liver and serum biochemistry; Acyl-CoA thioesterase 11; Lipid metabolism

期刊名称：JOURNAL OF THERMAL BIOLOGY （ 影响因子：2.902； 五年影响因子：3.102 ）

ISSN： 0306-4565

年卷期： 2020 年 93 卷

页码：

收录情况： SCI

摘要： Members of the ACOT (acyl-CoA thioesterase) family hydrolyze fatty acyl-CoA to form free fatty acids (FFAs) and coenzyme A (CoA). These enzymes play important roles in fatty acid metabolism. Here, we report the cloning and functional analysis of acot11 beta in hybrid yellow catfish (Pelteobagrus fulvidraco female x P. vachelli male). The open reading frame of acot11 beta was found to be 594 bp in length, encoding 198 amino acids. We determined the transcript levels of acot11 beta in ten tissues of hybrid yellow catfish by qRT-PCR and found that it was highly expressed in the liver, so we chose the liver for further analysis. We determined the transcript levels of acot11 beta in hybrid yellow catfish under heat stress conditions, and analyzed the changes in serum biochemical parameters, liver biochemical parameters, and transcript levels of lipid metabolism-related genes. Healthy yellow catfish were subjected to heat stress at 35 degrees C for 96 h, and the experimental results were compared with those from fish in a control group (28 degrees C). The levels of glucose (GLU), total cholesterol (TC), and triglyceride (TG) in serum were significantly increased in the heat-stressed group compared with the control group (P < 0.05). Acute heat stress led to decreased liver glycogen contents, but significantly increased TC and TG contents in the liver (P < 0.05). The transcript levels of acot11 beta acc, and fas were significantly reduced, while that of ppar alpha was significantly increased in hybrid yellow catfish exposed to heat stress (P < 0.05). Our results indicate that acot11 beta plays an important role in regulating lipid metabolism in hybrid yellow catfish, and this metabolic process is greatly affected by temperature. These results may be useful for developing effective strategies to prevent or reduce metabolic disorders of yellow catfish caused by high temperature.

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