数字农科院2.0

Transcriptome analysis reveals the synergistic involvement of MGLL and LPIN1 in fatty acid synthesis in broiler pectoral muscles

文献类型： 外文期刊

作者： Yanji Chen;Yongli Wang;Xiaojing Liu;Yanke Wang;Jie Wen;Guiping Zhao;Huanxian Cui

作者机构：

关键词： Broiler;Fatty acid;Muscle;Regulatory gene;Weighted gene co-expression network

期刊名称： Heliyon

ISSN： 2405-8440

年卷期： 2024 年 10 卷 15 期

页码：

收录情况： SCIE（2024版）

摘要： Fatty acids (FAs) are one of the most important bioactive compounds affecting the quality of meat. In this study, we compared the expression profiles of genes involved in FA production in the breast muscle of Jingxing Yellow chickens at different days of age determined by transcriptomic analysis to identify key genes and pathways regulating the FA composition of the breast muscle. Through clustering analysis of gene expression data, the growth process of broiler chickens can be divided into two stages, namely the growth and development stage at the 35th and 63rd days of age (D35, D63), and the mature stage at the 119th day of age (D119). The content of some important unsaturated fatty acids (UFAs), such as C18:2n6c, C20:4n6, and C22:6n3, in the pectoral muscles, differed significantly between these two stages (p < 0.05). Therefore, we compared the gene expression profiles at D35 and D63 with those at D119, and identified differentially expressed genes (DEGs). The gene modules related to the five UFAs with significant changes were identified by weighted gene co-expression network analysis (WGCNA), and then 150 crossover genes were identified by crossover analysis of the detected DEGs and WGCNA. The results of the pathway enrichment analysis revealed the glycerolipid metabolism pathway related to lipid metabolism, in which the MGLL and LPIN1 genes were particularly enriched. In this study, the expression levels of MGLL and LPIN1 showed an increasing trend during the growth process of broilers, with a negative regulatory effect on the significantly reduced content of C18:2n6c in the pectoral muscle, and a positive regulatory effect on the significantly increased content of C20:4n6. These findings indicated that MGLL and LPIN1 synergistically promote the deposition of FAs, which may further promote the conversion of linoleic acid (C18:2n6c) to arachidonic acid (C20:4n6). Therefore, screening and identifying FA production-related functional genes are key to elucidate the regulatory molecular mechanism of production of FAs in chicken muscle, aiming to provide a theoretical basis for improving chicken meat quality.

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