期刊
AQUACULTURE RESEARCH
卷 46, 期 5, 页码 1197-1208出版社
WILEY
DOI: 10.1111/are.12275
关键词
non-protein energy sources; lipid deposition site; lipid metabolism; gene expression; grass carp
类别
资金
- National Natural Science Foundation of China [31172420, 31072219]
- National Basic Research Program of China [2009CB118702]
- Special Fund for Agro-Scientific Research in the Public Interest of China [201003020]
- Fundamental Research Funds for the Central Universities [2010PY010, 2011PY030]
A study was conducted to determine the effects of dietary non-protein energy sources on growth, tissue lipid accumulation and lipid metabolism-related genes expression of grass carp. Triplicate groups of fish were fed for 9weeks on four isonitrogenous (300gkg(-1)) experimental diets with four levels of non-protein energy (6.52kJg(-1) control diet, 5.32kJg(-1) high-CEL diet, 8.46kJg(-1) high-CHO diet and 8.53kJg(-1) high-LIP diet respectively). Increasing dietary non-protein energy source levels did not improve the growth, and the high-CEL diet reduced the growth of grass carp. The high-CHO diet tended to induce high hepatosomatic index, with high fat and glycogen content of liver. However, the high-LIP diet caused the high mesenteric fat index, but did not increase liver fat. The mRNA abundance and activities of hepatic lipogenic enzymes were significantly increased in the high-CHO diet group, whereas the opposite tendencies were observed in the high-LIP diet group. Peroxisome proliferator-actived receptor- (PPAR) in liver and PPAR in mesenteric adipose tissue were up-regulated in the high-CEL diet group. Lipoprotein lipase (LPL) gene expression was significantly increased both in liver and mesenteric adipose tissue of fish fed the high-LIP diet, while the LPL gene expression was up-regulated in liver but down-regulated in mesenteric adipose tissue of fish fed the high-CEL diet. These findings suggest that an increase in dietary non-protein energy sources alters the genes expression of lipid metabolism and increased lipid deposition.
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