Animal Bioscience

Asian Australasian Association of Animal Production Societies (아세아태평양축산학회)
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Epigenetic regulation of key gene of PCK1 by enhancer and super-enhancer in the pathogenesis of fatty liver hemorrhagic syndrome

  • Yi Wang (Department of Pathophysiology, Anhui Medical University) ;
  • Shuwen Chen (Department of Pathophysiology, Anhui Medical University) ;
  • Min Xue (Department of Pathophysiology, Anhui Medical University) ;
  • Jinhu Ma (Department of Pathophysiology, Anhui Medical University) ;
  • Xinrui Yi (Department of Pathophysiology, Anhui Medical University) ;
  • Xinyu Li (Department of Pathophysiology, Anhui Medical University) ;
  • Xuejin Lu (Department of Pathophysiology, Anhui Medical University) ;
  • Meizi Zhu (Department of Pathophysiology, Anhui Medical University) ;
  • Jin Peng (Department of Pathophysiology, Anhui Medical University) ;
  • Yunshu Tang (Department of Pathophysiology, Anhui Medical University) ;
  • Yaling Zhu (Department of Pathophysiology, Anhui Medical University)
  • Received : 2023.10.18
  • Accepted : 2024.02.18
  • Published : 2024.08.01
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Abstract

Objective: Rare study of the non-coding and regulatory regions of the genome limits our ability to decode the mechanisms of fatty liver hemorrhage syndrome (FLHS) in chickens. Methods: Herein, we constructed the high-fat diet-induced FLHS chicken model to investigate the genome-wide active enhancers and transcriptome by H3K27ac target chromatin immunoprecipitation sequencing (ChIP-seq) and RNA sequencing (RNA-Seq) profiles of normal and FLHS liver tissues. Concurrently, an integrative analysis combining ChIP-seq with RNA-Seq and a comparative analysis with chicken FLHS, rat non-alcoholic fatty liver disease (NAFLD) and human NAFLD at the transcriptome level revealed the enhancer and super enhancer target genes and conservative genes involved in metabolic processes. Results: In total, 56 and 199 peak-genes were identified in upregulated peak-genes positively regulated by H3K27ac (Cor (peak-gene correlation) ≥0.5 and log2(FoldChange) ≥1) (PP) and downregulated peak-genes positively regulated by H3K27ac (Cor (peak-gene correlation) ≥0.5 and log2(FoldChange)≤-1) (PN), respectively; then we screened key regulatory targets mainly distributing in lipid metabolism (PCK1, APOA4, APOA1, INHBE) and apoptosis (KIT, NTRK2) together with MAPK and PPAR signaling pathway in FLHS. Intriguingly, PCK1 was also significantly covered in up-regulated super-enhancers (SEs), which further implied the vital role of PCK1 during the development of FLHS. Conclusion: Together, our studies have identified potential therapeutic biomarkers of PCK1 and elucidated novel insights into the pathogenesis of FLHS, especially for the epigenetic perspective.

Keywords

Acknowledgement

This work was supported by the National Natural Science Foundation of China (31960690) and Natural Science Foundation of the Anhui Higher Education Institutions (KJ2021 A0205) and Basic and Clinical cooperative research program of Anhui Medical University (2022xkjT013). We are grateful to colleagues in College of Animal Science and Technology, Jiangxi Agricultural University for data collection and experiments.

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