Metabolome and RNA-seq reveal discrepant metabolism and secretory metabolism profile in skeletal muscle between obese and lean pigs at different ages

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作者
Liu Guo [1 ,2 ]
Junfei Xu [1 ]
Wenyue Zhou [1 ]
Sisi Chen [1 ,2 ]
Hanjing Shi [1 ]
Mengmeng Han [1 ,2 ]
Zekun Yang [1 ]
Yehui Duan [1 ]
Weijun Pang [3 ]
Yulong Yin [1 ,4 ]
Fengna Li [1 ,4 ]
机构
[1] Laboratory of Animal Nutritional Physiology and Metabolic Process, Key Laboratory of Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences
[2] University of Chinese Academy of Sciences
[3] Laboratory of Animal Fat Deposition and Muscle Development, College of Animal Science and Technology, Northwest A&F University
[4] College of Advanced Agricultural Sciences, University of Chinese Academy of
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摘要
Metabolites and metabolism-related gene expression profiles in skeletal muscle change dramatically under obesity, aging and metabolic disease. Since obese and lean pigs are ideal models for metabolic research. Here, we compared metabolome and transcriptome of Longissimus dorsi(LD) muscle between Taoyuan black(TB, obese) and Duroc(lean) pigs at different ages. We defined the “window phase” of intramuscular fat(IMF) deposition in TB pig, which has significantly higher IMF than Duroc pig. Our results displayed discrepant lipid composition and different expression genes(DEGs) enriched in lipid metabolism, and both metabolome and transcriptome analyses revealed stronger energy expenditure and more active amino acid and protein metabolism in Duroc pig. 10 up-and 51 down-regulated biomarker metabolites with age-and breed-specificity were identified. Potential secretory metabolites, including organic acid(fumaric acid, succinate,malic acid, and gamma-aminobutyric acid), amino acid(L-lysine, and L-glutamic acid), lipid(2-hydroxyisovaleric acid, and L-carnitine) were demonstrated a significant correlation with IMF deposition. Our research highlights the huge difference of metabolic spectrum in skeletal muscle between obese and lean model and muscle-derived secretory metabolites might act as an ambassador of intercellular communication to regulate systematic metabolism.
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页码:1102 / 1117
页数:16
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