Influence of dietary nicotinic acid supplementation on lipid metabolism and related gene expression in two distinct broiler breeds of female chickens
文献类型: 外文期刊
作者: Jiang, R. R.;Zhao, G. P.;Zhao, J. P.;Chen, J. L.;Zheng, M. Q.;Liu, R. R.;Wen, J.;Jiang, R. R.
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关键词: chicken;fat deposition;hepatic gene expression;nicotinic acid;plasma metabolites
期刊名称: JOURNAL OF ANIMAL PHYSIOLOGY AND ANIMAL NUTRITION
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收录情况: SCI
摘要: This study aimed to evaluate the influence of supplemental dietary nicotinic acid (NA) on lipid metabolism and hepatic expression of related genes in female chickens of two distinct broiler strains [Arbor Acres (AA) and Beijing-You (BJY)]. The treatments were arranged in a 2x4 factorial in a completely randomized design. Day-old females (n=384) were allocated to four treatments with six cages per treatment and fed diets (basal contained approximately 25mgNA/kg) supplemented with 0, 30, 60 and 120mgNA/kg. A sample of 72 birds from each breed was slaughtered and sampled at their different market times (8week for AA and 16week for BJY). Arbor Acres broilers had thickness of subcutaneous fat plus the skin (SFS), and plasma concentration of low-density lipoprotein cholesterol (LDLC) and lower percentage of abdominal fat (PAF), plasma concentrations of TG, NEFA and adiponectin than the BJY line. The hepatic transcription of apolipoprotein A-I (ApoA-I), apolipoproteinB (ApoB), and adiponectin was significantly higher in AA broilers than in BJY broilers. In both breeds, BW, PAF, SFS, NEFA and TG were increased with increasing supplementation from 0 to 60mgNA/kg, but then decreased slightly with 120mg added NA/kg. With increasing supplementation, hepatic expression and plasma concentrations of adiponectin decreased from 0 to 60mg added NA/kg and then increased with 120mg added NA/kg. The expression of ApoA-I and ApoB mRNA showed linear response to dietary supplementation with NA. These findings indicate that: (i) supplementation of NA influenced the lipid metabolism and related gene expression; (ii) when supplemented with 120mgNA/kg, some pharmacologic actions on lipid metabolism appeared; and (iii) changes in BW and fat deposition appeared to be associated with hepatic expression of adiponectin.
分类号: S8
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