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Comparative analysis of effects of dietary arachidonic acid and EPA on growth, tissue fatty acid composition, antioxidant response and lipid metabolism in juvenile grass carp, Ctenopharyngodon idellus

文献类型： 外文期刊

作者： Tian, Jing-jing 1 ; Lei, Cai-xia 1 ; Ji, Hong 1 ; Kaneko, Gen 3 ; Zhou, Ji-shu 1 ; Yu, Hai-bo 1 ; Li, Yang 1 ; Yu, Er-men 1 ;

作者机构： 1.Northwest A&F Univ, Coll Anim Sci & Technol, Yangling 712100, Peoples R China

2.Chinese Acad Fishery Sci, Pearl River Fisheries Res Inst, Key Lab Trop & Subtrop Fishery Resource Applicat, Minist Agr, Guangzhou 510380, Guangdong, Peoples R China

3.Univ Houston Victoria, Sch Arts & Sci, Victoria, TX

关键词： Long-chain PUFA;Principle component analysis;Antioxidant status;Lipid metabolism;Ctenopharyngodon idellus

期刊名称：BRITISH JOURNAL OF NUTRITION （ 影响因子：3.718； 五年影响因子：4.816 ）

ISSN： 0007-1145

年卷期： 2017 年 118 卷 6 期

页码：

收录情况： SCI

摘要： Four isonitrogenous and isoenergetic purified diets containing free arachidonic acid (ARA) or EPA (control group), 0.30 % ARA, 0.30 % EPA and 0.30 % ARA+EPA (equivalent) were designed to feed juvenile grass carp (10.21 (sd 0.10) g) for 10 weeks. Only the EPA group presented better growth performance compared with the control group (P < 0.05). Dietary ARA and EPA were incorporated into polar lipids more than non-polar lipids in hepatopancreas but not intraperitoneal fat (IPF) tissue. Fish fed ARA and EPA showed an increase of serum superoxide dismutase and catalase activities, and decrease of glutathione peroxidase activity and malondialdehyde contents (P < 0.05). The hepatopancreatic TAG levels decreased both in ARA and EPA groups (P < 0.05), accompanied by the decrease of lipoprotein lipase (LPL) activity in the ARA group (P < 0.05). Fatty acid synthase (FAS), diacylglycerol O-acyltransferase and apoE gene expression in the hepatopancreas decreased in fish fed ARA and EPA, but only the ARA group exhibited increased mRNA level of adipose TAG lipase (ATGL) (P < 0.05). Decreased IPF index and adipocyte sizes were found in the ARA group (P < 0.05). Meanwhile, the ARA group showed decreased expression levels of adipogenic genes CCAAT enhancer-binding protein alpha, LPL and FAS, and increased levels of the lipid catabolic genes PPAR, ATGL, hormone-sensitive lipase and carnitine palmitoyltransferase 1 (CPT-1) in IPF, whereas the EPA group only increased PPAR and CPT-1 mRNA expression and showed less levels than the ARA group. Overall, dietary EPA is beneficial to the growth performance, whereas ARA is more potent in inducing lipolysis and inhibiting adipogenesis, especially in IPF. Meanwhile, dietary ARA and EPA showed the similar preference in esterification and the improvement in antioxidant response.

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