Genome wide transcriptome analysis provides bases on hepatic lipid metabolism disorder affected by increased dietary grain ratio in fattening lambs
文献类型： 外文期刊
作者： Mi, Hui 1 ; Hu, Fan 1 ; Gebeyew, Kefyalew 1 ; Cheng, Yan 1 ; Du, Ruiping 3 ; Gao, Min 3 ; He, Zhixiong 1 ; Tan, Zhiliang 1 ;
作者机构： 1.Chinese Acad Sci, Inst Subtrop Agr, South Cent Expt Stn Anim Nutr & Feed Sci, Minist Agr,Hunan Prov Engn Res Ctr Hlth Livestock, Changsha 410125, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Inner Mongolia Acad Agr & Anim Husb Sci, Hohhot 010031, Inner Mongolia, Peoples R China
关键词： Hepatic lipid metabolism; Fattening lamb; Dietary grain ratio; RNA-sequencing
期刊名称：BMC GENOMICS （ 影响因子：4.4； 五年影响因子：4.7 ）
ISSN： 1471-2164
年卷期： 2023 年 24 卷 1 期
页码：
收录情况： SCI
摘要： BackgroundThe liver is a principal metabolic organ and has a major role in regulating lipid metabolism. With the development of rapidly fattening livestock in the modern breeding industry, the incidence of hepatic steatosis and accumulation in animals was significantly increased. However, the molecular mechanisms responsible for hepatic lipid metabolic disturbances in a high concentrate diet remain unclear. The objective of this study was to evaluate the effects of increasing concentrate level in a fattening lamb diet on biochemical indices, hepatic triglycerides (TG) concentration, and hepatic transcriptomic profiles. In the present study, 42 weaned lambs (about 3 & PLUSMN; 0.3 months old) were randomly assigned to the GN60 group (60% concentrate of dry matter, GN60, n = 21) or GN70 group (70% concentrate of dry matter, n = 21) for a 3-months feeding trial.ResultsNo difference was observed in the growth performance or plasma biochemical parameters between the GN60 group and the GN70 group. The hepatic TG concentration was higher in the GN70 group than GN60 group (P < 0.05). Hepatic transcriptomic analysis showed that there were 290 differentially expressed genes identified between GN60 and GN70 groups, with 125 genes up-regulated and 165 genes down-regulated in the GN70 group. The enriched Gene Ontology (GO) items and KEGG pathways and protein-protein interaction (PPI) network of differentially expressed genes (DEGs) revealed that the majority of enriched pathways were related to lipid metabolism. Further analysis revealed that the fatty acid synthesis was up-regulated, while fatty acid transport, oxidation, and TG degradation were down-regulated in the GN70 group when compared with the GN60 group.ConclusionsThese results indicated that GN70 induced excess lipid deposition in the liver of lambs during the fattening period, with high synthesis rates and low degradation rates of TG. The identified mechanisms may help understand hepatic metabolism in lambs with a high concentrate diet and provide insight into decreasing the risk of liver metabolism disorder in animals.
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