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Changes of Metabolites and Gene Expression under Different Feeding Systems Associated with Lipid Metabolism in Lamb Meat

文献类型： 外文期刊

作者： Wang, Bo 1 ; Zhao, Xingang 1 ; Li, Zhen 1 ; Luo, Hailing 1 ; Zhang, Hao 2 ; Guo, Yanping 1 ; Zhang, Can 1 ; Ma, Qing 3 ;

作者机构： 1.China Agr Univ, State Key Lab Anim Nutr, Coll Anim Sci & Technol, Beijing 100193, Peoples R China

2.China Agr Univ, Beijing Adv Innovat Ctr Food Nutr & Human Hlth, Coll Food Sci & Nutr Engn, Beijing 100083, Peoples R China

3.Ningxia Acad Agr & Forestry Sci, Res Ctr Grass & Livestock, Yinchuan 750002, Ningxia, Peoples R China

关键词： lamb meat; lipid metabolism; fatty acids; metabolites; gene expression; feeding system

期刊名称：FOODS （ 影响因子：4.35； 五年影响因子：4.957 ）

ISSN：

年卷期： 2021 年 10 卷 11 期

页码：

收录情况： SCI

摘要： The effects of the different feeding systems, graze feeding (GSF), time-limited graze feeding (GF), and stall-feeding (SF)) on the fatty acid content, metabolites, and genes expression of the longissimus dorsi (LD) in Tan lambs were investigated in the present study. Thirty-nine 4-month-old male Tan lambs with similar body weight (24.91 & PLUSMN; 1.74 kg) were selected and divided into the three feeding systems (n = 13) randomly. Lambs were slaughtered after 83 days of the feeding trails, and LD muscle samples were collected for further analysis. The results indicated that different feeding systems have no significant effect on short-chain fatty acids in Tan lambs (p > 0.05). However, the total saturated fatty acids ( n-ary sumation SFA) and monounsaturated fatty acids ( n-ary sumation MUFA) in the GSF and GF groups were lower than those in the SF group (p < 0.001). The total polyunsaturated fatty acids ( n-ary sumation PUFA) in the GSF group were higher than those in the GF and SF groups (p < 0.001). Moreover, in the comparison of both GF vs GSF groups and SF vs GSF groups, metabolomic analysis showed that metabolites such as cis-(6,9,12)-linolenic acid, arachidic acid, acetylcarnitine, and L-carnitine with lower concentration were significantly enriched in the biosynthesis of unsaturated fatty acid pathway (p < 0.05), but metabolites such as phosphorylcholine, glycerophosphocholine, cytidine 5'-diphosphocholine, and glycerol-3-phosphate with higher concentrations were enriched in the glycerophospholipid metabolism pathway. KEGG (Kyoto Encyclopedia of Genes and Genomes) analysis of the results indicated that in the comparison of the GSF group with the SF group, differentially expressed genes (DEGs) such as LIPC, ERFE, FABP3, PLA2R1, LDLR, and SLC10A6, were enriched in the steroid biosynthesis and cholesterol metabolism pathways. In addition, differential metabolites and genes showed a significant correlation with the content of n-ary sumation SFA, n-ary sumation MUFA, and n-ary sumation PUFA in lamb meat (p < 0.05). These findings demonstrated that the feeding system was an important factor in regulating fatty acid content by affecting lipid-metabolism-related metabolites and gene expression in muscle, and graze-feeding system provided lamb meat with higher n-ary sumation PUFA content than time-limited-grazing and stall-feeding systems.

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