数字农科院2.0

Integrated multiomic profiling of tail adipose tissue highlights novel genes, lipids, and metabolites involved in tail fat deposition in sheep

文献类型： 外文期刊

作者： Xie, Yujing;Li, Xin;Liang, Huili;Chu, Mingxing;Cao, Guiling;Jiang, Yunliang

作者机构：

关键词： Sheep;Tail adipose tissues;Transcriptome;Lipidome;Metabolome

期刊名称： BMC GENOMICS

ISSN： 1471-2164

年卷期： 2025 年 26 卷 1 期

页码：

收录情况： SCIE（2025版）

摘要： Background Tail fat is important for fat-tailed or fat-rumped sheep to survive in harsh environments. However, the molecular mechanism underlying tail fat deposition in sheep remains unclear. In this study, we comprehensively characterized the transcriptome, untargeted lipidome, and targeted metabolome profiles of the tail adipose tissues from Large-tailed Han sheep (long fat-tailed sheep) and Hu sheep (short fat-tailed sheep). Results We identified 183 differentially expressed genes (DEGs), 55 differential lipids (DLs) and 17 differential metabolites (DMs) in the adipose tissues of the tails from Large-tailed Han and Hu sheep. Among the 183 DEGs selected (Q values <= 0.05 and & boxv;Log2(FC)& boxv;>= 0.5), 18 DEGs, such as UCP3, ELOVL7 and GDF10, were directly associated with lipid metabolism identified via Gene Ontology (GO) analysis. Some genes, such as PPP3R1A, ADRA1, and DSLC46A2, were reportedly associated with lipid metabolism. A fold change >= 1.2 or <= 0.83 and a P-value < 0.05 were set as the default threshold to select the DLs and DMs. Among the 55 DLs, 36 DLs were phosphatidylcholines and 9 DLs were phosphatidylethanolamines. The top six DLs with the greatest differences in content were LPE (20:4) (up), PC (42:10) (up), PC (42:8) (up), PC (16:1/16:1) (down), PC (29:0) (down), and PC (32:2) (down). DMs related to the tricarboxylic acid cycle, such as D-glucose, cis-aconitic acid and citric acid were abundant in the tail fat of Large-tailed Han sheep. The DEGs, DLs and DMs were enriched mainly in the ferroptosis, the extracellular matrix (ECM)-receptor interaction, cGMP-PKG, calcium signaling and pathways related to cardiomyopathy and the tricarboxylic acid cycle. Conclusion This study obtained profiles of the transcriptome, lipidome and metabolome of the tail fat tissues of sheep with long and short fat tails. The findings suggested that ELOVL7, UCP3 and ferroptosis, ECM-receptor interaction pathways contributed to the difference in fat deposition, and phosphatidylcholines biosynthesis and tricarboxylic acid cycle may affect lipid metabolism in sheep tails. The results enhance our understanding of the differences in fat deposition in sheep tail.

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