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Zhu YL, Meng LL, Ma JH, Yuan X, Chen SW, Yi XR, Li XY, Wang Y, Tang YS, Xue M, Zhu MZ, Peng J, Lu XJ, Huang JZ, Song ZC, Wu C, Zheng KZ, Dai QQ, Huang F, Fang HS. Loss of LBP triggers lipid metabolic disorder through H3K27 acetylation-mediated C/EBPβ- SCD activation in non-alcoholic fatty liver disease. Zool Res 2024; 45:79-94. [PMID: 38114435 PMCID: PMC10839665 DOI: 10.24272/j.issn.2095-8137.2023.022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2023] [Accepted: 08/24/2023] [Indexed: 12/21/2023] Open
Abstract
Non-alcoholic fatty liver disease (NAFLD) is associated with mutations in lipopolysaccharide-binding protein ( LBP), but the underlying epigenetic mechanisms remain understudied. Herein, LBP -/- rats with NAFLD were established and used to conduct integrative targeting-active enhancer histone H3 lysine 27 acetylation (H3K27ac) chromatin immunoprecipitation coupled with high-throughput and transcriptomic sequencing analysis to explore the potential epigenetic pathomechanisms of active enhancers of NAFLD exacerbation upon LBP deficiency. Notably, LBP -/- reduced the inflammatory response but markedly aggravated high-fat diet (HFD)-induced NAFLD in rats, with pronounced alterations in the histone acetylome and regulatory transcriptome. In total, 1 128 differential enhancer-target genes significantly enriched in cholesterol and fatty acid metabolism were identified between wild-type (WT) and LBP -/- NAFLD rats. Based on integrative analysis, CCAAT/enhancer-binding protein β (C/EBPβ) was identified as a pivotal transcription factor (TF) and contributor to dysregulated histone acetylome H3K27ac, and the lipid metabolism gene SCD was identified as a downstream effector exacerbating NAFLD. This study not only broadens our understanding of the essential role of LBP in the pathogenesis of NAFLD from an epigenetics perspective but also identifies key TF C/EBPβ and functional gene SCD as potential regulators and therapeutic targets.
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Affiliation(s)
- Ya-Ling Zhu
- Department of Pathophysiology, Anhui Medical University, Hefei, Anhui 230032, China
- Laboratory Animal Research Center, School of Basic Medical Sciences, Anhui Medical University, Hefei, Anhui 230032, China
| | - Lei-Lei Meng
- Department of Pathophysiology, Anhui Medical University, Hefei, Anhui 230032, China
| | - Jin-Hu Ma
- Department of Pathophysiology, Anhui Medical University, Hefei, Anhui 230032, China
| | - Xin Yuan
- Department of Pathophysiology, Anhui Medical University, Hefei, Anhui 230032, China
| | - Shu-Wen Chen
- Department of Pathophysiology, Anhui Medical University, Hefei, Anhui 230032, China
| | - Xin-Rui Yi
- Department of Pathophysiology, Anhui Medical University, Hefei, Anhui 230032, China
| | - Xin-Yu Li
- Department of Pathophysiology, Anhui Medical University, Hefei, Anhui 230032, China
| | - Yi Wang
- Department of Pathophysiology, Anhui Medical University, Hefei, Anhui 230032, China
| | - Yun-Shu Tang
- Department of Pathophysiology, Anhui Medical University, Hefei, Anhui 230032, China
- Laboratory Animal Research Center, School of Basic Medical Sciences, Anhui Medical University, Hefei, Anhui 230032, China
| | - Min Xue
- Department of Pathophysiology, Anhui Medical University, Hefei, Anhui 230032, China
| | - Mei-Zi Zhu
- Department of Pathophysiology, Anhui Medical University, Hefei, Anhui 230032, China
| | - Jin Peng
- Department of Pathophysiology, Anhui Medical University, Hefei, Anhui 230032, China
| | - Xue-Jin Lu
- Department of Pathophysiology, Anhui Medical University, Hefei, Anhui 230032, China
| | - Jian-Zhen Huang
- College of Animal Science and Technology, Jiangxi Agricultural University, Nanchang, Jiangxi 330045, China
| | - Zi-Chen Song
- Department of Pathophysiology, Anhui Medical University, Hefei, Anhui 230032, China
| | - Chong Wu
- Department of Pathophysiology, Anhui Medical University, Hefei, Anhui 230032, China
| | - Ke-Zhong Zheng
- Department of Hepatobiliary Surgery, First Affiliated Hospital of Anhui Medical University, Hefei, Anhui 230022, China
| | - Qing-Qing Dai
- Department of Hepatobiliary Surgery, First Affiliated Hospital of Anhui Medical University, Hefei, Anhui 230022, China
| | - Fan Huang
- Department of Hepatobiliary Surgery, First Affiliated Hospital of Anhui Medical University, Hefei, Anhui 230022, China. E-mail:
| | - Hao-Shu Fang
- Department of Pathophysiology, Anhui Medical University, Hefei, Anhui 230032, China
- Laboratory Animal Research Center, School of Basic Medical Sciences, Anhui Medical University, Hefei, Anhui 230032, China. E-mail:
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