Response of Turbot Scophthalmus maximus (Linnaeus, 1758) to Imbalanced Branched-Chain Amino Acids in Diets
文献类型： 外文期刊
作者： Wang, Lu 1 ; Liu, Jinshi 2 ; Li, Yanlu 2 ; Ma, Qiang 2 ; Xu, Houguo 2 ; Liang, Mengqing 2 ; Wei, Yuliang 2 ;
作者机构： 1.Shanghai Ocean Univ, Coll Fisheries & Life Sci, Shanghai 201306, Peoples R China
2.Chinese Acad Fishery Sci, Yellow Sea Fisheries Res Inst, Qingdao 266071, Peoples R China
3.Laoshan Lab, Lab Marine Fisheries Sci & Food Prod Proc, Qingdao 266237, Peoples R China
关键词： branched-chain amino acid metabolism; postprandial amino acid concentration; antagonism; leucine; isoleucine; valine
期刊名称：FISHES （ 影响因子：2.3； 五年影响因子：2.4 ）
ISSN：
年卷期： 2023 年 8 卷 11 期
页码：
收录情况： SCI
摘要： The aim of this study was to investigate the effects of imbalanced dietary BCAAs, especially Leu, on the growth and BCAA metabolism in turbot. A control diet was formulated by keeping optimum levels of Leu, Ile and Val. Four experimental diets were prepared by removing supplemental crystalline Leu (deficiency) or supplementing double the amount of Leu, Ile or Val (excess) in the control diet. The growth was not significantly decreased by an excess of Leu, Ile or Val. Fish fed an excess of any particular BCAA significantly increased its postprandial (2 and 6 h) concentration in the plasma, muscles, and liver, but did not decrease the other two BCAA concentrations. The expression of intestinal b0at1 was down-regulated by excessive dietary Leu, Ile or Val. For BCAA catabolism, the mRNA levels of bcat2 in the muscles as well as bckdha and bckdhb in the livers of the Leu-deficient group were the lowest among all the groups, but were up-regulated by excess dietary Leu, Ile or Val. In conclusion, in terms of growth, turbot had high plasticity to an excess of any particular BCAA. Meanwhile, the antagonistic effect caused by an excess of one BCAA were reflected in intestinal amino acid absorption and BCAA catabolism.
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