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Li Z, Sun X. Epigenetic regulation in liver regeneration. Life Sci 2024; 353:122924. [PMID: 39038511 DOI: 10.1016/j.lfs.2024.122924] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2023] [Revised: 07/15/2024] [Accepted: 07/17/2024] [Indexed: 07/24/2024]
Abstract
The liver is considered unique in its enormous capacity for regeneration and self-repair. In contrast to other regenerative organs (i.e., skin, skeletal muscle, and intestine), whether the adult liver contains a defined department of stem cells is still controversial. In order to compensate for the massive loss of hepatocytes following liver injury, the liver processes a precisely controlled transcriptional reprogram that can trigger cell proliferation and cell-fate switch. Epigenetic events are thought to regulate the organization of chromatin architecture and gene transcription during the liver regenerative process. In this review, we will summarize how changes to the chromatin by epigenetic modifiers are translated into cell fate transitions to restore liver homeostasis during liver regeneration.
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Affiliation(s)
- Zilong Li
- Institute of Brain Science and Brain-inspired Research, Shandong First Medical University & Shandong Academy of Medical Sciences, 250117 Jinan, Shandong, China; Department of Gastroenterology, Shandong Provincial Hospital Affiliated to Shandong First Medical University, 250021 Jinan, Shandong, China.
| | - Xinyue Sun
- Department of Pharmacology, China Pharmaceutical University, 210009 Nanjing, Jiangsu, China
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2
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Swer PB, Kharbuli B, Syiem D, Sharma R. Age-related decline in the expression of BRG1, ATM and ATR are partially reversed by dietary restriction in the livers of female mice. Biogerontology 2024:10.1007/s10522-024-10117-7. [PMID: 38970714 DOI: 10.1007/s10522-024-10117-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2024] [Accepted: 06/26/2024] [Indexed: 07/08/2024]
Abstract
BRG1 (Brahma-related gene 1) is a member of the SWI/SNF (switch/sucrose nonfermentable) chromatin remodeling complex which utilizes the energy from ATP hydrolysis for its activity. In addition to its role of regulating the expression of a vast array of genes, BRG1 mediates DNA repair upon genotoxic stress and regulates senescence. During organismal ageing, there is accumulation of unrepaired/unrepairable DNA damage due to progressive breakdown of the DNA repair machinery. The present study investigates the expression level of BRG1 as a function of age in the liver of 5- and 21-month-old female mice. It also explores the impact of dietary restriction on BRG1 expression in the old (21-month) mice. Salient findings of the study are: Real-time PCR and Western blot analyses reveal that BRG1 levels are higher in 5-month-old mice but decrease significantly with age. Dietary restriction increases BRG1 expression in the 21-month-old mice, nearly restoring it to the level observed in the younger group. Similar expression patterns are observed for DNA damage response genes ATM (Ataxia Telangiectasia Mutated) and ATR (Ataxia Telangiectasia and Rad3-related) with the advancement in age and which appears to be modulated by dietary restriction. BRG1 transcriptionally regulates ATM as a function of age and dietary restriction. These results suggest that BRG1, ATM and ATR are downregulated as mice age, and dietary restriction can restore their expression. This implies that dietary restriction may play a crucial role in regulating BRG1 and related gene expression, potentially maintaining liver repair and metabolic processes as mice age.
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Affiliation(s)
- Pynskhem Bok Swer
- Department of Biochemistry, North-Eastern Hill University, Shillong, 793022, India
| | | | - Donkupar Syiem
- Department of Biochemistry, North-Eastern Hill University, Shillong, 793022, India
| | - Ramesh Sharma
- Department of Biochemistry, North-Eastern Hill University, Shillong, 793022, India.
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3
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Singh S, Kumar PVSNK, Kumar JP, Tomo S, Yadav D, Sharma P, Rao M, Banerjee M. Genetic and Epigenetic Basis of Drug-Induced Liver Injury. Semin Liver Dis 2023; 43:163-175. [PMID: 37225145 DOI: 10.1055/a-2097-0531] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Drug-induced liver injury (DILI) is a rare but severe adverse drug reaction seen in pharmacotherapy and a major cause of postmarketing drug withdrawals. Advances in genome-wide studies indicate that genetic and epigenetic diversity can lead to inter-individual differences in drug response and toxicity. It is necessary to identify how the genetic variations, in the presence of environmental factors, can contribute to development and progression of DILI. Studies on microRNA, histone modification, DNA methylation, and single nucleotide polymorphisms related to DILI were retrieved from databases and were analyzed for the current research and updated to develop this narrative review. We have compiled some of the major genetic, epigenetic, and pharmacogenetic factors leading to DILI. Many validated genetic risk factors of DILI, such as variants of drug-metabolizing enzymes, HLA alleles, and some transporters were identified. In conclusion, these studies provide useful information in risk alleles identification and on implementation of personalized medicine.
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Affiliation(s)
- Snigdha Singh
- Department of Biochemistry, All India Institute of Medical Sciences, Jodhpur, Rajasthan, India
| | - P V S N Kiran Kumar
- Department of Biochemistry, All India Institute of Medical Sciences, Jodhpur, Rajasthan, India
| | - J Pradeep Kumar
- Department of Biochemistry, All India Institute of Medical Sciences, Jodhpur, Rajasthan, India
| | - Sojit Tomo
- Department of Biochemistry, All India Institute of Medical Sciences, Jodhpur, Rajasthan, India
| | - Dharamveer Yadav
- Department of Biochemistry, All India Institute of Medical Sciences, Jodhpur, Rajasthan, India
| | - Praveen Sharma
- Department of Biochemistry, All India Institute of Medical Sciences, Jodhpur, Rajasthan, India
| | - Mahadev Rao
- Department of Pharmacy Practice, Manipal College of Pharmaceutical Sciences, Manipal, Karnataka, India
| | - Mithu Banerjee
- Department of Biochemistry, All India Institute of Medical Sciences, Jodhpur, Rajasthan, India
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4
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Fan Z, Kong M, Dong W, Dong C, Miao X, Guo Y, Liu X, Miao S, Li L, Chen T, Qu Y, Yu F, Duan Y, Lu Y, Zou X. Trans-activation of eotaxin-1 by Brg1 contributes to liver regeneration. Cell Death Dis 2022; 13:495. [PMID: 35614068 PMCID: PMC9132924 DOI: 10.1038/s41419-022-04944-0] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2021] [Revised: 05/10/2022] [Accepted: 05/12/2022] [Indexed: 12/14/2022]
Abstract
Infiltration of eosinophils is associated with and contributes to liver regeneration. Chemotaxis of eosinophils is orchestrated by the eotaxin family of chemoattractants. We report here that expression of eotaxin-1 (referred to as eotaxin hereafter), but not that of either eotaxin-2 or eotaxin-3, were elevated, as measured by quantitative PCR and ELISA, in the proliferating murine livers compared to the quiescent livers. Similarly, exposure of primary murine hepatocytes to hepatocyte growth factor (HGF) stimulated eotaxin expression. Liver specific deletion of Brahma-related gene 1 (Brg1), a chromatin remodeling protein, attenuated eosinophil infiltration and down-regulated eotaxin expression in mice. Brg1 deficiency also blocked HGF-induced eotaxin expression in cultured hepatocytes. Further analysis revealed that Brg1 could directly bind to the proximal eotaxin promoter to activate its transcription. Mechanistically, Brg1 interacted with nuclear factor kappa B (NF-κB)/RelA to activate eotaxin transcription. NF-κB knockdown or pharmaceutical inhibition disrupted Brg1 recruitment to the eotaxin promoter and blocked eotaxin induction in hepatocytes. Adenoviral mediated over-expression of eotaxin overcame Brg1 deficiency caused delay in liver regeneration in mice. On the contrary, eotaxin depletion with RNAi or neutralizing antibodies retarded liver regeneration in mice. More important, Brg1 expression was detected to be correlated with eotaxin expression and eosinophil infiltration in human liver specimens. In conclusion, our data unveil a novel role of Brg1 as a regulator of eosinophil trafficking by activating eotaxin transcription.
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Affiliation(s)
- Zhiwen Fan
- grid.428392.60000 0004 1800 1685Department of Pathology, Nanjing Drum Tower Hospital Affiliated with Nanjing University School of Medicine, Nanjing, China ,grid.428392.60000 0004 1800 1685Department of Gastroenterology, Nanjing Drum Tower Hospital Affiliated with Nanjing University School of Medicine, Nanjing, China
| | - Ming Kong
- grid.89957.3a0000 0000 9255 8984Key Laboratory of Targeted Intervention of Cardiovascular Disease and Collaborative Innovation Center for Cardiovascular Translational Medicine, Department of Pathophysiology, Nanjing Medical University, Nanjing, China
| | - Wenhui Dong
- grid.89957.3a0000 0000 9255 8984Key Laboratory of Targeted Intervention of Cardiovascular Disease and Collaborative Innovation Center for Cardiovascular Translational Medicine, Department of Pathophysiology, Nanjing Medical University, Nanjing, China
| | - Chunlong Dong
- grid.410745.30000 0004 1765 1045Department of Hepatobiliary Surgery, Nanjing Drum Tower Hospital, Clinical College of Traditional Chinese and Western Medicine, Nanjing University of Chinese Medicine, Nanjing, China
| | - Xiulian Miao
- grid.411351.30000 0001 1119 5892College of Life Sciences and Institute of Biomedical Research, Liaocheng University, Liaocheng, China
| | - Yan Guo
- grid.411351.30000 0001 1119 5892College of Life Sciences and Institute of Biomedical Research, Liaocheng University, Liaocheng, China
| | - Xingyu Liu
- grid.411351.30000 0001 1119 5892College of Life Sciences and Institute of Biomedical Research, Liaocheng University, Liaocheng, China
| | - Shuying Miao
- grid.428392.60000 0004 1800 1685Department of Pathology, Nanjing Drum Tower Hospital Affiliated with Nanjing University School of Medicine, Nanjing, China
| | - Lin Li
- grid.428392.60000 0004 1800 1685Department of Pathology, Nanjing Drum Tower Hospital Affiliated with Nanjing University School of Medicine, Nanjing, China
| | - Tingting Chen
- grid.428392.60000 0004 1800 1685Department of Pathology, Nanjing Drum Tower Hospital Affiliated with Nanjing University School of Medicine, Nanjing, China
| | - Yeqing Qu
- grid.428392.60000 0004 1800 1685Experimental Animal Center, Nanjing Drum Tower Hospital Affiliated with Nanjing University School of Medicine, Nanjing, China
| | - Fei Yu
- grid.428392.60000 0004 1800 1685Experimental Animal Center, Nanjing Drum Tower Hospital Affiliated with Nanjing University School of Medicine, Nanjing, China
| | - Yunfei Duan
- grid.490563.d0000000417578685Department of Hepatobiliary Surgery, the First People’s Hospital of Changzhou, the Third Hospital Affiliated with Soochow University, Changzhou, China
| | - Yunjie Lu
- grid.490563.d0000000417578685Department of Hepatobiliary Surgery, the First People’s Hospital of Changzhou, the Third Hospital Affiliated with Soochow University, Changzhou, China
| | - Xiaoping Zou
- grid.428392.60000 0004 1800 1685Department of Gastroenterology, Nanjing Drum Tower Hospital Affiliated with Nanjing University School of Medicine, Nanjing, China
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5
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Cai Q, Gan C, Tang C, Wu H, Gao J. Mechanism and Therapeutic Opportunities of Histone Modifications in Chronic Liver Disease. Front Pharmacol 2021; 12:784591. [PMID: 34887768 PMCID: PMC8650224 DOI: 10.3389/fphar.2021.784591] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2021] [Accepted: 11/08/2021] [Indexed: 02/05/2023] Open
Abstract
Chronic liver disease (CLD) represents a global health problem, accounting for the heavy burden of disability and increased health care utilization. Epigenome alterations play an important role in the occurrence and progression of CLD. Histone modifications, which include acetylation, methylation, and phosphorylation, represent an essential part of epigenetic modifications that affect the transcriptional activity of genes. Different from genetic mutations, histone modifications are plastic and reversible. They can be modulated pharmacologically without changing the DNA sequence. Thus, there might be chances to establish interventional solutions by targeting histone modifications to reverse CLD. Here we summarized the roles of histone modifications in the context of alcoholic liver disease (ALD), metabolic associated fatty liver disease (MAFLD), viral hepatitis, autoimmune liver disease, drug-induced liver injury (DILI), and liver fibrosis or cirrhosis. The potential targets of histone modifications for translation into therapeutics were also investigated. In prospect, high efficacy and low toxicity drugs that are selectively targeting histone modifications are required to completely reverse CLD and prevent the development of liver cirrhosis and malignancy.
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Affiliation(s)
- Qiuyu Cai
- Laboratory of Gastroenterology and Hepatology, West China Hospital, Sichuan University, Chengdu, China
- Department of Gastroenterology, West China Hospital, Sichuan University, Chengdu, China
| | - Can Gan
- Laboratory of Gastroenterology and Hepatology, West China Hospital, Sichuan University, Chengdu, China
- Department of Gastroenterology, West China Hospital, Sichuan University, Chengdu, China
| | - Chengwei Tang
- Laboratory of Gastroenterology and Hepatology, West China Hospital, Sichuan University, Chengdu, China
- Department of Gastroenterology, West China Hospital, Sichuan University, Chengdu, China
| | - Hao Wu
- Department of Gastroenterology, West China Hospital, Sichuan University, Chengdu, China
| | - Jinhang Gao
- Laboratory of Gastroenterology and Hepatology, West China Hospital, Sichuan University, Chengdu, China
- Department of Gastroenterology, West China Hospital, Sichuan University, Chengdu, China
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6
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Panda PP, Bohot M, Chaturvedi MM, Purohit JS. Purification and partial characterization of vinculin from chicken liver nuclear extract. Biologia (Bratisl) 2021. [DOI: 10.1007/s11756-021-00691-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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7
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Swer PB, Sharma R. ATP-dependent chromatin remodelers in ageing and age-related disorders. Biogerontology 2020; 22:1-17. [PMID: 32968929 DOI: 10.1007/s10522-020-09899-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2020] [Accepted: 09/16/2020] [Indexed: 11/27/2022]
Abstract
Ageing is characterized by the perturbation in cellular homeostasis associated with genomic instability, telomere attrition, epigenetic alterations, loss of proteostasis, deregulated nutrient sensing, mitochondrial dysfunction, cellular senescence, stem cell exhaustion and altered intracellular communication. Changes in the epigenome represent one of the crucial mechanisms during ageing and in age-related disorders. The ATP-dependent chromatin remodelers are an evolutionarily conserved family of nucleosome remodelling factors and generally regulate DNA repair, replication, recombination, transcription and cell cycle. Here, we review the chromatin based epigenetic changes that occur in ageing and age-related disorders with a specific reference to chromatin remodelers. We also discuss the link between dietary restriction and chromatin remodelers in regulating age-related processes with a view for consideration in future intervention studies.
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Affiliation(s)
- Pynskhem Bok Swer
- Department of Biochemistry, North-Eastern Hill University, Shillong, 793022, India
| | - Ramesh Sharma
- Department of Biochemistry, North-Eastern Hill University, Shillong, 793022, India.
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8
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Hyslip J, Martins PN. Liver Repair and Regeneration in Transplant: State of the Art. CURRENT TRANSPLANTATION REPORTS 2020. [DOI: 10.1007/s40472-020-00269-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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9
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Chromatin dynamics during liver regeneration. Semin Cell Dev Biol 2020; 97:38-46. [DOI: 10.1016/j.semcdb.2019.03.004] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2018] [Revised: 03/12/2019] [Accepted: 03/28/2019] [Indexed: 12/15/2022]
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10
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Jancewicz I, Siedlecki JA, Sarnowski TJ, Sarnowska E. BRM: the core ATPase subunit of SWI/SNF chromatin-remodelling complex-a tumour suppressor or tumour-promoting factor? Epigenetics Chromatin 2019; 12:68. [PMID: 31722744 PMCID: PMC6852734 DOI: 10.1186/s13072-019-0315-4] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2019] [Accepted: 10/31/2019] [Indexed: 02/07/2023] Open
Abstract
BRM (BRAHMA) is a core, SWI2/SNF2-type ATPase subunit of SWI/SNF chromatin-remodelling complex (CRC) involved in various important regulatory processes including development. Mutations in SMARCA2, a BRM-encoding gene as well as overexpression or epigenetic silencing were found in various human diseases including cancer. Missense mutations in SMARCA2 gene were recently connected with occurrence of Nicolaides-Baraitser genetics syndrome. By contrast, SMARCA2 duplication rather than mutations is characteristic for Coffin-Siris syndrome. It is believed that BRM usually acts as a tumour suppressor or a tumour susceptibility gene. However, other studies provided evidence that BRM function may differ depending on the cancer type and the disease stage, where BRM may play a role in the disease progression. The existence of alternative splicing forms of SMARCA2 gene, leading to appearance of truncated functional, loss of function or gain-of-function forms of BRM protein suggest a far more complicated mode of BRM-containing SWI/SNF CRCs actions. Therefore, the summary of recent knowledge regarding BRM alteration in various types of cancer and highlighting of differences and commonalities between BRM and BRG1, another SWI2/SNF2 type ATPase, will lead to better understanding of SWI/SNF CRCs function in cancer development/progression. BRM has been recently proposed as an attractive target for various anticancer therapies including the use of small molecule inhibitors, synthetic lethality induction or proteolysis-targeting chimera (PROTAC). However, such attempts have some limitations and may lead to severe side effects given the homology of BRM ATPase domain to other ATPases, as well as due to the tissue-specific appearance of BRM- and BRG1-containing SWI/SNF CRC classes. Thus, a better insight into BRM-containing SWI/SNF CRCs function in human tissues and cancers is clearly required to provide a solid basis for establishment of new safe anticancer therapies.
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Affiliation(s)
- Iga Jancewicz
- Department of Molecular and Translational Oncology, The Maria Sklodowska-Curie Institute-Oncology Center in Warsaw, Wawelska 15B, 02-034, Warsaw, Poland
| | - Janusz A Siedlecki
- Department of Molecular and Translational Oncology, The Maria Sklodowska-Curie Institute-Oncology Center in Warsaw, Wawelska 15B, 02-034, Warsaw, Poland
| | - Tomasz J Sarnowski
- Institute of Biochemistry and Biophysics Polish Academy of Sciences, Pawinskiego 5A, 02-106, Warsaw, Poland.
| | - Elzbieta Sarnowska
- Department of Molecular and Translational Oncology, The Maria Sklodowska-Curie Institute-Oncology Center in Warsaw, Wawelska 15B, 02-034, Warsaw, Poland.
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11
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Wang B, Kaufmann B, Engleitner T, Lu M, Mogler C, Olsavszky V, Öllinger R, Zhong S, Geraud C, Cheng Z, Rad RR, Schmid RM, Friess H, Hüser N, Hartmann D, von Figura G. Brg1 promotes liver regeneration after partial hepatectomy via regulation of cell cycle. Sci Rep 2019; 9:2320. [PMID: 30787318 PMCID: PMC6382836 DOI: 10.1038/s41598-019-38568-w] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2018] [Accepted: 12/21/2018] [Indexed: 12/29/2022] Open
Abstract
Brahma-related gene 1 (Brg1), a catalytic subunit of the SWItch/Sucrose Non-Fermentable (SWI/SNF) complex, is known to be involved in proliferative cell processes. Liver regeneration is initiated spontaneously after injury and leads to a strong proliferative response. In this study, a hepatocyte-specific Brg1 gene knockout mouse model was used to analyse the role of Brg1 in liver regeneration by performing a 70% partial hepatectomy (PH). After PH, Brg1 was significantly upregulated in wildtype mice. Mice with hepatocyte-specific Brg1 gene knockout showed a significantly lower liver to body weight ratio 48 h post-PH concomitant with a lower hepatocellular proliferation rate compared to wildtype mice. RNA sequencing demonstrated that Brg1 controlled hepatocyte proliferation through the regulation of the p53 pathway and several cell cycle genes. The data of this study reveal a crucial role of Brg1 for liver regeneration by promoting hepatocellular proliferation through modulation of cell cycle genes and, thus, identify Brg1 as potential target for therapeutic approaches.
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Affiliation(s)
- Baocai Wang
- Department of Surgery, TUM School of Medicine, Klinikum rechts der Isar, Technical University of Munich, Munich, 81675, Germany.,Department of General Surgery, the Affiliated Zhongda Hospital, School of Medicine, Southeast University, Nanjing, 210000, China
| | - Benedikt Kaufmann
- Department of Surgery, TUM School of Medicine, Klinikum rechts der Isar, Technical University of Munich, Munich, 81675, Germany
| | - Thomas Engleitner
- Institute of Molecular Oncology and Functional Genomics, Department of Medicine II and TranslaTUM Cancer Center, Klinikum rechts der Isar, Technical University of Munich, Munich, 81675, Germany
| | - Miao Lu
- Department of General Surgery, the Affiliated Zhongda Hospital, School of Medicine, Southeast University, Nanjing, 210000, China
| | - Carolin Mogler
- Institute of Pathology, TUM School of Medicine, Klinikum rechts der Isar, Technical University of Munich, Munich, 81675, Germany
| | - Victor Olsavszky
- Department of Dermatology, Venereology, and Allergology, University Medical Center and Medical Faculty Mannheim, Heidelberg University and Center of Excellence in Dermatology, Mannheim, 68135, Germany
| | - Rupert Öllinger
- Institute of Molecular Oncology and Functional Genomics, Department of Medicine II and TranslaTUM Cancer Center, Klinikum rechts der Isar, Technical University of Munich, Munich, 81675, Germany
| | - Suyang Zhong
- Department of Medicine II, TUM School of Medicine, Klinikum rechts der Isar, Technical University of Munich, Munich, 81675, Germany
| | - Cyrill Geraud
- Department of Dermatology, Venereology, and Allergology, University Medical Center and Medical Faculty Mannheim, Heidelberg University and Center of Excellence in Dermatology, Mannheim, 68135, Germany
| | - Zhangjun Cheng
- Department of General Surgery, the Affiliated Zhongda Hospital, School of Medicine, Southeast University, Nanjing, 210000, China
| | - Roland R Rad
- Institute of Molecular Oncology and Functional Genomics, Department of Medicine II and TranslaTUM Cancer Center, Klinikum rechts der Isar, Technical University of Munich, Munich, 81675, Germany
| | - Roland M Schmid
- Department of Medicine II, TUM School of Medicine, Klinikum rechts der Isar, Technical University of Munich, Munich, 81675, Germany
| | - Helmut Friess
- Department of Surgery, TUM School of Medicine, Klinikum rechts der Isar, Technical University of Munich, Munich, 81675, Germany
| | - Norbert Hüser
- Department of Surgery, TUM School of Medicine, Klinikum rechts der Isar, Technical University of Munich, Munich, 81675, Germany
| | - Daniel Hartmann
- Department of Surgery, TUM School of Medicine, Klinikum rechts der Isar, Technical University of Munich, Munich, 81675, Germany.
| | - Guido von Figura
- Department of Medicine II, TUM School of Medicine, Klinikum rechts der Isar, Technical University of Munich, Munich, 81675, Germany.
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12
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Li N, Kong M, Zeng S, Hao C, Li M, Li L, Xu Z, Zhu M, Xu Y. Brahma related gene 1 (Brg1) contributes to liver regeneration by epigenetically activating the Wnt/β-catenin pathway in mice. FASEB J 2018; 33:327-338. [PMID: 30001167 DOI: 10.1096/fj.201800197r] [Citation(s) in RCA: 50] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Liver regeneration is a complicated pathophysiologic process that is regulated by a myriad of signaling pathways and transcription factors. The interaction among these pathways and factors, either cooperatively or antagonistically, may ultimately lead to recovery and restoration of liver function or permanent loss of liver function and liver failure. In the present study, we investigated the mechanism whereby the chromatin remodeling protein brahma related gene 1 (Brg1) regulates liver regeneration in mice. The Smarca4-Flox strain of mice was crossbred with the Alb-Cre strain to generate hepatocyte-specific Brg1 knockout mice. Liver injury was induced by partial hepatectomy (PHx). We report that Brg1 deletion in hepatocyte compromised liver regeneration and dampened survival after PHx in mice. Brg1 interacted with β-catenin to potentiate Wnt signaling and promote hepatocyte proliferation. Mechanistically, Brg1 recruited lysine demethylase 4 (KDM4) to activate β-catenin target genes. Our data suggest that Brg1 might play an essential role maintaining hepatic homeostasis and contributing to liver repair.-Li, N., Kong, M., Zeng, S., Hao, C., Li, M., Li, L., Xu, Z., Zhu, M., Xu, Y. Brahma related gene 1 (Brg1) contributes to liver regeneration by epigenetically activating the Wnt/β-catenin pathway in mice.
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Affiliation(s)
- Nan Li
- Department of Pathophysiology, Key Laboratory of Targeted Intervention of Cardiovascular Disease, Collaboration Center for Cardiovascular Translational Medicine, Nanjing Medical University, Nanjing, China
| | - Ming Kong
- Department of Pathophysiology, Key Laboratory of Targeted Intervention of Cardiovascular Disease, Collaboration Center for Cardiovascular Translational Medicine, Nanjing Medical University, Nanjing, China
| | - Sheng Zeng
- Department of Pathophysiology, Key Laboratory of Targeted Intervention of Cardiovascular Disease, Collaboration Center for Cardiovascular Translational Medicine, Nanjing Medical University, Nanjing, China
| | - Chenzhi Hao
- Department of Pathophysiology, Key Laboratory of Targeted Intervention of Cardiovascular Disease, Collaboration Center for Cardiovascular Translational Medicine, Nanjing Medical University, Nanjing, China
| | - Min Li
- Department of Pathophysiology, Key Laboratory of Targeted Intervention of Cardiovascular Disease, Collaboration Center for Cardiovascular Translational Medicine, Nanjing Medical University, Nanjing, China
| | - Luyang Li
- Department of Pathophysiology, Key Laboratory of Targeted Intervention of Cardiovascular Disease, Collaboration Center for Cardiovascular Translational Medicine, Nanjing Medical University, Nanjing, China
| | - Zheng Xu
- Department of Pathophysiology, Key Laboratory of Targeted Intervention of Cardiovascular Disease, Collaboration Center for Cardiovascular Translational Medicine, Nanjing Medical University, Nanjing, China
| | - Min Zhu
- Department of Anatomy, Nanjing Medical University, Nanjing, China
| | - Yong Xu
- Department of Pathophysiology, Key Laboratory of Targeted Intervention of Cardiovascular Disease, Collaboration Center for Cardiovascular Translational Medicine, Nanjing Medical University, Nanjing, China
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