The Effect of the Feeding System on Fat Deposition in Yak Subcutaneous Fat

文献类型： 外文期刊

第一作者： Xiong, Lin

作者： Xiong, Lin;Pei, Jie;Bao, Pengjia;Wang, Xingdong;Guo, Shaoke;Cao, Mengli;Kang, Yandong;Yan, Ping;Guo, Xian;Xiong, Lin;Pei, Jie;Bao, Pengjia;Wang, Xingdong;Guo, Shaoke;Cao, Mengli;Kang, Yandong;Yan, Ping;Guo, Xian;Xiong, Lin;Pei, Jie;Bao, Pengjia;Wang, Xingdong;Guo, Shaoke;Cao, Mengli;Kang, Yandong;Yan, Ping;Guo, Xian

作者机构：

关键词： yak; feeding system; subcutaneous fat; fat deposition; regulatory mechanism

期刊名称：INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES （ 影响因子：5.6； 五年影响因子：6.2 ）

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年卷期： 2023 年 24 卷 8 期

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收录情况： SCI

摘要： Fat deposition is very important to the growth and reproduction of yaks. In this study, the effect of the feeding system on fat deposition in yaks was explored by transcriptomics and lipidomics. The thickness of the subcutaneous fat in yaks under stall (SF) and graze feeding (GF) was evaluated. The transcriptomes and lipidomes of the subcutaneous fat in yaks under different feeding systems were detected by RNA-sequencing (RNA-Seq) and non-targeted lipidomics based on ultrahigh-phase liquid chromatography tandem mass spectrometry (UHPLC-MS), respectively. The differences in lipid metabolism were explored, and the function of differentially expressed genes (DEGs) was evaluated by gene ontology (GO) and Kyoto encyclopedia of genes and genome (KEGG) analysis. Compared with GF yaks, SF yaks possessed stronger fat deposition capacity. The abundance of 12 triglycerides (TGs), 3 phosphatidylethanolamines (PEs), 3 diglycerides (DGs), 2 sphingomyelins (SMs) and 1 phosphatidylcholine (PC) in the subcutaneous fat of SF and GF yaks was significantly different. Under the mediation of the cGMP-PKG signaling pathway, the blood volume of SF and GF yaks may be different, which resulted in the different concentrations of precursors for fat deposition, including non-esterified fatty acid (NEFA), glucose (GLU), TG and cholesterol (CH). The metabolism of C16:0, C16:1, C17:0, C18:0, C18:1, C18:2 and C18:3 in yak subcutaneous fat was mainly realized under the regulation of the INSIG1, ACACA, FASN, ELOVL6 and SCD genes, and TG synthesis was regulated by the AGPAT2 and DGAT2 genes. This study will provide a theoretical basis for yak genetic breeding and healthy feeding.

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