Fish protein hydrolysate in diets of turbot affects muscle fibre morphometry, and the expression of muscle growth-related genes
文献类型： 外文期刊
作者： Wei, Yuliang 1 ; Li, Benxiang 1 ; Xu, Houguo 1 ; Liang, Mengqing 1 ;
作者机构： 1.Chinese Acad Fishery Sci, Yellow Sea Fisheries Res Inst, 1 Wenhai Rd, Qingdao 266237, Peoples R China
2.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Fisheries Sci & Food Prod Proc, 1 Wenhai Rd, Qingdao 266237, Peoples R China
关键词： fish protein hydrolysate; gene expression; growth performance; muscle fibre morphometry; muscle growth; turbot
期刊名称：AQUACULTURE NUTRITION （ 影响因子：3.497； 五年影响因子：3.78 ）
ISSN： 1353-5773
年卷期： 2020 年 26 卷 5 期
页码：
收录情况： SCI
摘要： The study was conducted to investigate the effects of fish protein hydrolysate (FPH) in diets for turbot on growth performance, muscle fibre morphometry, and the expression of muscle growth-related genes. A control diet (FPH0) contained 0 g/kg FPH, and four experimental diets were formulated replacing fishmeal with FPH at levels of 45 (FPH4.5), 120 (FPH12), 180 (FPH18) and 300 (FPH30) g/kg. Fish fed the FPH12 and FPH18 diets had higher specific growth rate (SGR) than fish fed the FPH0 diet (p < .05), and a quadratic regression was found between SGR and dietary FPH level (p = .001,R-2 = .677). Cross-section area (CSA) and the length of sarcomere in the FPH12 group increased compared with the control group (p < .05), and a quadratic regression was observed between CSA and dietary FPH level (p = .006,R-2 = .574) and between sarcomere length and dietary FPH level (p = .018,R-2 = .788). An appropriate level of FPH down-regulated myostatin 2 gene expression and up-regulated proliferating cell nuclear antigen gene expression, while the expression of myogenic regulatory factors was not affected by dietary treatments (p > .05). To conclude, an appropriate level of FPH may improve muscle growth by regulating the expression of muscle growth-related genes, and muscle microstructure and ultrastructure.
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