Integrated targeted metabolomics and transcriptomics analysis reveals heterogeneity of subcutaneous and pericardial adipose tissues in Yili horses.
Abstract: Fat deposition is a key economic trait in livestock, yet distinct adipose depots often display marked functional heterogeneity. The molecular basis underlying this divergence in Yili horses, however, remains poorly understood. Therefore, we hypothesized that the heterogeneity in fatty acid composition between subcutaneous (SAT) and pericardial adipose tissues (PCAT) in Yili horses is associated with distinct transcriptional programs, which can be explored using an integrated multi-omics approach. Using targeted metabolomics, we found that PCAT contained significantly higher levels of total, saturated, and polyunsaturated fatty acids, but lower monounsaturated fatty acids (MUFAs) compared with SAT. Transcriptomic profiling identified 1513 differentially expressed genes (DEGs), which were primarily enriched in metabolic, endocrine, and signal transduction pathways. Integrative analysis further highlighted , , , , , and as key regulators associated with depot-specific fatty acid differences. Collectively, these findings demonstrate the molecular heterogeneity between SAT and PCAT in Yili horses, support our original hypothesis, and provide a molecular basis for understanding adipose depot-specific lipid metabolism, with potential implications for improving fat deposition traits in Yili horses.
© 2026 The Authors.
Publication Date: 2026-01-26 PubMed ID: 41660677PubMed Central: PMC12874588DOI: 10.1016/j.fochms.2026.100365Google Scholar: Lookup
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Summary
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Overview
- This study investigates the differences in fat composition and gene expression between two types of fat tissue (subcutaneous and pericardial adipose tissues) in Yili horses using combined metabolic and gene expression analyses.
- The research reveals distinct fatty acid profiles and identifies key genes that regulate these differences, providing insights into fat metabolism specific to these fat depots.
Introduction and Rationale
- Fat deposition is an important economic trait for livestock, influencing meat quality and animal health.
- Adipose tissue is heterogeneous; different fat depots have varied functions and molecular characteristics.
- In Yili horses, the molecular mechanisms behind the functional heterogeneity between subcutaneous adipose tissue (SAT) and pericardial adipose tissue (PCAT) are not well understood.
- The hypothesis is that differences in fatty acid composition between SAT and PCAT correspond to distinct gene expression patterns, which can be uncovered by integrative metabolomics and transcriptomics (multi-omics) analysis.
Methods
- Targeted metabolomics was used to quantify various fatty acids in both SAT and PCAT, including total, saturated, monounsaturated (MUFAs), and polyunsaturated fatty acids (PUFAs).
- Transcriptomic profiling (e.g., RNA sequencing) was employed to identify differentially expressed genes (DEGs) between the two adipose tissue types.
- Integrated analysis combined metabolite data with gene expression data to pinpoint genes involved in fatty acid metabolism and regulation specific to each tissue.
Results
- Metabolomics revealed distinct fatty acid profiles:
- PCAT had significantly higher levels of total fatty acids, saturated fatty acids, and polyunsaturated fatty acids compared to SAT.
- PCAT had lower levels of monounsaturated fatty acids than SAT.
- Transcriptomic analysis identified 1,513 differentially expressed genes between SAT and PCAT.
- These genes were mainly enriched in pathways related to:
- Metabolic processes
- Endocrine functions
- Signal transduction
- Integration of metabolite and gene expression data highlighted several key regulators (the exact genes were not specified in the abstract) that are strongly associated with fatty acid differences between the two adipose depots.
Conclusions and Implications
- The study confirms molecular heterogeneity between SAT and PCAT in Yili horses at both metabolic and transcriptional levels.
- These results support the initial hypothesis that fatty acid composition differences correspond to distinct transcriptional profiles.
- The identified molecular signatures provide a better understanding of depot-specific lipid metabolism in horses.
- This knowledge has practical implications for breeding or managing Yili horses to improve fat deposition traits, potentially enhancing economic value and animal health.
- Overall, the research underscores the benefit of integrated multi-omics approaches to dissect complex biological traits like fat heterogeneity across different adipose tissues.
Cite This Article
APA
Yang L, Shen Z, Song L, Lu Z, Zeng Y, Wang J, Ren W, Yao X, Meng J.
(2026).
Integrated targeted metabolomics and transcriptomics analysis reveals heterogeneity of subcutaneous and pericardial adipose tissues in Yili horses.
Food Chem (Oxf), 12, 100365.
https://doi.org/10.1016/j.fochms.2026.100365 Publication
Researcher Affiliations
- College of Animal Science, Xinjiang Agricultural University, Urumqi 830052, Xinjiang, China.
- College of Animal Science, Xinjiang Agricultural University, Urumqi 830052, Xinjiang, China.
- College of Animal Science, Xinjiang Agricultural University, Urumqi 830052, Xinjiang, China.
- College of Animal Science, Xinjiang Agricultural University, Urumqi 830052, Xinjiang, China.
- College of Animal Science, Xinjiang Agricultural University, Urumqi 830052, Xinjiang, China.
- Xinjiang Key Laboratory of Horse Breeding and Sports Physiology, Xinjiang Agricultural University, Urumqi 830052, Xinjiang, China.
- Horse Industry Research Institute, Xinjiang Agricultural University, Urumqi 830052, Xinjiang, China.
- College of Animal Science, Xinjiang Agricultural University, Urumqi 830052, Xinjiang, China.
- Xinjiang Key Laboratory of Horse Breeding and Sports Physiology, Xinjiang Agricultural University, Urumqi 830052, Xinjiang, China.
- Horse Industry Research Institute, Xinjiang Agricultural University, Urumqi 830052, Xinjiang, China.
- College of Animal Science, Xinjiang Agricultural University, Urumqi 830052, Xinjiang, China.
- Xinjiang Key Laboratory of Horse Breeding and Sports Physiology, Xinjiang Agricultural University, Urumqi 830052, Xinjiang, China.
- Horse Industry Research Institute, Xinjiang Agricultural University, Urumqi 830052, Xinjiang, China.
- College of Animal Science, Xinjiang Agricultural University, Urumqi 830052, Xinjiang, China.
- Xinjiang Key Laboratory of Horse Breeding and Sports Physiology, Xinjiang Agricultural University, Urumqi 830052, Xinjiang, China.
- Horse Industry Research Institute, Xinjiang Agricultural University, Urumqi 830052, Xinjiang, China.
- College of Animal Science, Xinjiang Agricultural University, Urumqi 830052, Xinjiang, China.
- Xinjiang Key Laboratory of Horse Breeding and Sports Physiology, Xinjiang Agricultural University, Urumqi 830052, Xinjiang, China.
- Horse Industry Research Institute, Xinjiang Agricultural University, Urumqi 830052, Xinjiang, China.
Conflict of Interest Statement
The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
References
This article includes 50 references
- Arfuso F, Giannetto C, Panzera MF, Fazio F, Piccione G. Uncoupling protein-1 (UCP1) in the adult horse: Correlations with body weight, rectal temperature and lipid profile.. Animals 2021;11(6):1836–1844.
- Ayuso M, Fernández A, Isabel B, Rey A, Benítez R, Daza A, Óvilo C. Long term vitamin a restriction improves meat quality parameters and modifies gene expression in Iberian pigs.. Journal of Animal Science 2015;93(6):2730–2744.
- Beldarrain LR, Morán L, Sentandreu M, Insausti K, LJ RB, Aldai N. Muscle and subcutaneous fatty acid composition and the evaluation of ageing time on meat quality parameters of hispano-bretón horse breed.. Animals 2021;11(5):1421–1438.
- Blaj I, Tetens J, Preuß S, Bennewitz J, Thaller G. Genome-wide association studies and meta-analysis uncovers new candidate genes for growth and carcass traits in pigs.. PLoS One 2018;13(10).
- Chakraborty D, Sharma N, Kour S, Sodhi SS, Gupta MK, Lee SJ, Son YO. Applications of omics technology for livestock selection and improvement.. Frontiers in Genetics 2022;13.
- Chen M, Liang H, Wu M, Ge H, Ma Y, Shen Y, Lu S, Shen C, Zhang H, Wang Z, Tang L. Fgf9 regulates bone marrow mesenchymal stem cell fate and bone-fat balance in osteoporosis by PI3K/AKT/hippo and MEK/ERK signaling.. International Journal of Biological Sciences 2024;20(9):3461–3479.
- Demmert TT, Klambauer K, Moser LJ, Mergen V, Eberhard M, Alkadhi H. Epicardial and pericardial adipose tissue: Anatomy, physiology, imaging, segmentation, and treatment effects.. The British Journal of Radiology 2025;98(1170).
- Du L, Chang T, An B, Liang M, Deng T, Li K, Cao S, Du Y, Gao X, Xu L, Zhang L, Li J, Gao H. Transcriptomics and lipid metabolomics analysis of subcutaneous, visceral, and abdominal adipose tissues of beef cattle.. Genes 2023;14(1):37–57.
- Gozalo-Marcilla M, Buntjer J, Johnsson M, Batista L, Diez F, Werner CR, Ros-Freixedes R. Genetic architecture and major genes for backfat thickness in pig lines of diverse genetic backgrounds.. Genetics Selection Evolution 2021;53(1):76.
- Grohmann M, Sabin M, Holly J, Shield J, Crowne E, Stewart C. Characterization of differentiated subcutaneous and visceral adipose tissue from children: The influences of TNF-alpha and IGF-I.. Journal of Lipid Research 2005;46(1):93–103.
- Guiu-Jurado E, Unthan M, Böhler N, Kern M, Landgraf K, Dietrich A, Schleinitz D, Ruschke K, Klöting N, Faßhauer M, Tönjes A, Stumvoll M, Körner A, Kovacs P, Blüher M. Bone morphogenetic protein 2 (BMP2) may contribute to partition of energy storage into visceral and subcutaneous fat depots.. Obesity (Silver Spring) 2016;24(10):2092–2100.
- Hou B, Zhao Y, He P, Xu C, Ma P, Lam SM, Du G. Targeted lipidomics and transcriptomics profiling reveal the heterogeneity of visceral and subcutaneous white adipose tissue.. Life Sciences 2020;245.
- Jia M, Yue H, Wang X, Zong A, Xu T, Xu YJ, Liu Y. Medium-chain triglyceride attenuates obesity by activating brown adipose tissue via upregulating the AMPK signaling pathway.. Journal of Nutritional Biochemistry 2025;141.
- Jin M, Liu G, Liu E, Wang L, Jiang Y, Zheng Z, Lu J, Lu Z, Ma Y, Liu Y, Quan K, Jin H, Jiang X, Fei X, Li T, Cao J, Yuan Z, Du L, Wang H, Wei C. Genomic insights into the population history of fat-tailed sheep and identification of two mutations that contribute to fat tail adipogenesis.. Journal of Advanced Research 2025;57.
- Jump DB, Tripathy S, Depner CM. Fatty acid-regulated transcription factors in the liver.. Annual Review of Nutrition 2013;33:249–269.
- Kawaguchi F, Okura K, Oyama K, Mannen H, Sasazaki S. Identification of leptin gene polymorphisms associated with carcass traits and fatty acid composition in Japanese black cattle.. Animal Science Journal 2017;88(3):433–438.
- Kong Y, Zhang X, Wang Z, Li F, Yue X. Integrating lipidomics and transcriptomics to reveal the heterogeneity of sheep adipose tissues.. Food Bioscience 2024;60.
- Kotikalapudi N, Ramachandran D, Vieira D, Rubio WB, Gipson GR, Troncone L, Banks AS. Acute regulation of murine adipose tissue lipolysis and insulin resistance by the TGFβ superfamily protein GDF3.. Nature Communications 2025;16(1):4432.
- Lee JH, Yamamoto I, Jeong JS, Nade T, Arai T, Kimura N. Relationship between adipose maturity and fatty acid composition in various adipose tissues of Japanese black, Holstein and crossbred (F1) steers.. Animal Science Journal 2011;82(5):689–697.
- Lefterova MI, Haakonsson AK, Lazar MA, Mandrup S. PPARγ and the global map of adipogenesis and beyond.. Trends in Endocrinology and Metabolism 2014;25(6):293–302.
- Liu J, Jiang Y, Chen C, Zhang L, Wang J, Yang C, Wu T, Yang S, Tao C, Wang Y. Bone morphogenetic protein 2 enhances porcine beige adipogenesis via AKT/mTOR and MAPK signaling pathways.. International Journal of Molecular Sciences 2024;25(7):3915–3931.
- Liu J, Sebastià C, Jové-Juncà T, Quintanilla R, González-Rodríguez O, Passols M, Folch JM. Identification of genomic regions associated with fatty acid metabolism across blood, liver, backfat and muscle in pigs.. Genetics Selection Evolution 2024;56(1):66.
- Liu P, Li D, Zhang J, He M, Li Y, Liu R, Li M. Transcriptomic and lipidomic profiling of subcutaneous and visceral adipose tissues in 15 vertebrates.. Scientific Data 2023;10(1):453.
- Lu Y, Li M, Gao Z, Ma H, Chong Y, Hong J, Wu J, Wu D, Xi D, Deng W. Innovative insights into single-cell technologies and multi-omics integration in livestock and poultry.. International Journal of Molecular Sciences 2024;25(23).
- Lu Z, Wen M, Yao X, Meng J, Wang J, Zeng Y, Li L, Ren W. Differential analysis of testicular LncRNA in Kazakh horses of different ages.. International Journal of Biological Macromolecules 2025;321.
- Ma F, Zou Q, Zhao X, Liu H, Du H, Xing K, Ding X, Wang C. Multi-omics integration reveals the regulatory mechanisms of APC and CREB5 genes in lipid biosynthesis and fatty acid composition in pigs.. Food Chemistry 2025;482.
- Mejdell CM, Bøe KE, Jørgensen GHM. Caring for the horse in a cold climate-reviewing principles for thermoregulation and horse preferences.. Applied Animal Behaviour Science 2020;231.
- Nawaz A, Zhang J, Meng Y, Sun L, Zhou H, Geng C, Liu H, Jin Y, Ji S. Fatty acid profiles unveiled: Gene expression in Yanbian yellow cattle adipose tissues offers new insights into lipid metabolism.. Archives Animal Breeding 2024;67(4):469–480.
- Orrù L, Cifuni GF, Piasentier E, Corazzin M, Bovolenta S, Moioli B. Association analyses of single nucleotide polymorphisms in the LEP and SCD1 genes on the fatty acid profile of muscle fat in Simmental bulls.. Meat Science 2011;87(4):344–348.
- Pawlak M, Lefebvre P, Staels B. Molecular mechanism of PPARα action and its impact on lipid metabolism, inflammation and fibrosis in non-alcoholic fatty liver disease.. Journal of Hepatology 2015;62(3):720–733.
- Rosen ED, Spiegelman BM. What we talk about when we talk about fat.. Cell 2014;156(1–2):20–44.
- Ros-Freixedes R, Gol S, Pena RN, Tor M, Ibáñez-Escriche N, Dekkers JC, Estany J. Genome-wide association study singles out SCD and LEPR as the two main loci influencing intramuscular fat content and fatty acid composition in duroc pigs.. PLoS One 2016;11(3).
- Sacks HS, Fain JN. Human epicardial adipose tissue: a review.. American Heart Journal 2007;153(6):907–917.
- Scheidl TB, Brightwell AL, Easson SH, Thompson JA. Maternal obesity and programming of metabolic syndrome in the offspring: Searching for mechanisms in the adipocyte progenitor pool.. BMC Medicine 2023;21(1):50.
- Simcox J, Lamming DW. The central moTOR of metabolism.. Developmental Cell 2022;57(6):691–706.
- Suárez-Mesa R, Ros-Freixedes R, Pena RN, Reixach J, Estany J. Impact of the leptin receptor gene on pig performance and quality traits.. Scientific Reports 2024;14(1):10652.
- Tegeler AP, Ford HR, Fiallo-Diez JF, Michelotti TC, Johnson BJ, Benitez OJ, Strieder-Barboza C. Transcriptome and cellular evidence of depot-specific function in beef cattle intramuscular, subcutaneous, and visceral adipose tissues.. Biology 2025;14(7):848–872.
- Wadood AA, Bordbar F, Zhang X. Integrating omics approaches in livestock biotechnology: Innovations in production and reproductive efficiency.. Frontiers in Animal Science 2025;6:1551244.
- Wahli W, Michalik L. PPARs at the crossroads of lipid signaling and inflammation.. Trends in Endocrinology and Metabolism 2012;23(7):351–363.
- Wang B, Li P, Zhou W, Gao C, Liu H, Li H, Niu P, Zhang Z, Li Q, Zhou J, Huang R. Association of twelve candidate gene polymorphisms with the intramuscular fat content and average backfat thickness of chinese suhuai pigs.. Animals 2019;9(11):858–870.
- Wang D, Qin P, Zhang K, Wang Y, Guo Y, Cheng Z, Li Z, Tian Y, Kang X, Li H, Liu X. Integrated LC/MS-based lipidomics and transcriptomics analyses revealed lipid composition heterogeneity between pectoralis intramuscular fat and abdominal fat and its regulatory mechanism in chicken.. Food Research International 2023;172.
- Wang J, Ren W, Li Z, Li L, Wang R, Ma S, Zeng Y, Meng J, Yao X. Plasma lipidomics and proteomics analyses pre- and post-5000 m race in Yili horses.. Animals 2025;15(7):994–1011.
- Wang T, Yang X, Ren W, Meng J, Yao X, Chu H, Yao R, Zhai M, Zeng Y. Integrating miRNA, mRNA, and targeted metabolomics analyses to explore the regulatory mechanism of cardiac remodeling in Yili horses.. Biology 2025;14(11):1535–1554.
- Wood JD, Enser M, Fisher AV, Nute GR, Sheard PR, Richardson RI, Whittington FM. Fat deposition, fatty acid composition and meat quality: A review.. Meat Science 2008;78(4):343–358.
- Zhang D, Wu W, Huang X, Xu K, Zheng C, Zhang J. Comparative analysis of gene expression profiles in differentiated subcutaneous adipocytes between Jiaxing black and large white pigs.. BMC Genomics 2021;22(1):61.
- Zhang T, Niu Q, Wang T, Zheng X, Li H, Gao X, Xu L. Comparative transcriptomic analysis reveals diverse expression pattern underlying fatty acid composition among different beef cuts.. Foods 2022;11(1):117–134.
- Zhang X, Wu D, Wang C, Luo Y, Ding X, Yang X, Liu M. Sustained activation of autophagy suppresses adipocyte maturation via a lipolysis-dependent mechanism.. Autophagy 2020;16(9):1668–1682.
- Zhao W, Hu J, Li L, Xue L, Tian J, Zhang T, Yang L, Gu Y, Zhang J. Integrating lipidomics and metabolomics to reveal biomarkers of fat deposition in chicken meat.. Food Chemistry 2025;464.
- Zheng S, Hou H, Li X, Wang X, Meng Q, Qiao Z, Tu Y, Yang Y, He D, Shen X, Yao J. Fatty acid composition and gene regulatory network analysis of pectoral muscle in pigeons across developmental stages.. Food Chemistry 2025;11.
- Zhong J, Guo J, Zhang X, Feng S, Di W, Wang Y, Zhu H. The remodeling roles of lipid metabolism in colorectal cancer cells and immune microenvironment.. Oncology Research 2022;30(5):231–242.
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