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Hsu MF, Koike S, Chen CS, Najjar SM, Meng TC, Haj FG. Pharmacological inhibition of the Src homology phosphatase 2 confers partial protection in a mouse model of alcohol-associated liver disease. Biomed Pharmacother 2024; 175:116590. [PMID: 38653109 DOI: 10.1016/j.biopha.2024.116590] [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: 09/26/2023] [Revised: 04/06/2024] [Accepted: 04/10/2024] [Indexed: 04/25/2024] Open
Abstract
Alcohol-associated liver disease (ALD) is a leading factor of liver-related death worldwide. ALD has various manifestations that include steatosis, hepatitis, and cirrhosis and is currently without approved pharmacotherapies. The Src homology phosphatase 2 (Shp2) is a drug target in some cancers due to its positive regulation of Ras-mitogen-activated protein kinase signaling and cell proliferation. Shp2 pharmacological inhibition yields beneficial outcomes in animal disease models, but its impact on ALD remains unexplored. This study aims to investigate the effects of Shp2 inhibition and its validity using a preclinical mouse model of ALD. We report that the administration of SHP099, a potent and selective allosteric inhibitor of Shp2, partially ameliorated ethanol-induced hepatic injury, inflammation, and steatosis in mice. Additionally, Shp2 inhibition was associated with reduced ethanol-evoked activation of extracellular signal-regulated kinase (ERK), oxidative, and endoplasmic reticulum (ER) stress in the liver. Besides the liver, excessive alcohol consumption induces multi-organ injury and dysfunction, including the intestine. Notably, Shp2 inhibition diminished ethanol-induced intestinal inflammation and permeability, abrogated the reduction in tight junction protein expression, and the activation of ERK and stress signaling in the ileum. Collectively, Shp2 pharmacological inhibition mitigates the deleterious effects of ethanol in the liver and intestine in a mouse model of ALD. Given the multifactorial aspects underlying ALD pathogenesis, additional studies are needed to decipher the utility of Shp2 inhibition alone or as a component in a multitherapeutic regimen to combat this deadly malady.
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Affiliation(s)
- Ming-Fo Hsu
- Department of Nutrition, University of California Davis, One Shields Ave, Davis, CA 95616, USA.
| | - Shinichiro Koike
- Department of Nutrition, University of California Davis, One Shields Ave, Davis, CA 95616, USA
| | - Chang-Shan Chen
- Institute of Biological Chemistry, Academia Sinica, Nankang, Taipei, Taiwan
| | - Sonia M Najjar
- Department of Biomedical Sciences, Heritage College of Osteopathic Medicine, Ohio University, Athens, OH 45701, USA; Diabetes Institute, Heritage College of Osteopathic Medicine, Ohio University, Athens, OH 45701, USA
| | - Tzu-Ching Meng
- Institute of Biological Chemistry, Academia Sinica, Nankang, Taipei, Taiwan
| | - Fawaz G Haj
- Department of Nutrition, University of California Davis, One Shields Ave, Davis, CA 95616, USA; Comprehensive Cancer Center, University of California Davis, Sacramento, CA 95817, USA; Division of Endocrinology, Diabetes, and Metabolism, Department of Internal Medicine, University of California Davis, Sacramento, CA 95817, USA.
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Hsu MF, LeBleu G, Flores L, Parkhurst A, Nagy LE, Haj FG. Hepatic protein tyrosine phosphatase Shp2 disruption mitigates the adverse effects of ethanol in the liver by modulating oxidative stress and ERK signaling. Life Sci 2024; 340:122451. [PMID: 38253311 DOI: 10.1016/j.lfs.2024.122451] [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: 11/13/2023] [Revised: 01/09/2024] [Accepted: 01/17/2024] [Indexed: 01/24/2024]
Abstract
AIMS Chronic excessive alcohol intake is a significant cause of alcohol-associated liver disease (ALD), a leading contributor to liver-related morbidity and mortality. The Src homology phosphatase 2 (Shp2; encoded by Ptpn11) is a widely expressed protein tyrosine phosphatase that modulates hepatic functions, but its role in ALD is mostly uncharted. MAIN METHODS Herein, we explore the effects of liver-specific Shp2 genetic disruption using the established chronic-plus-binge mouse model of ALD. KEY FINDINGS We report that the hepatic Shp2 disruption had beneficial effects and partially ameliorated ethanol-induced injury, inflammation, and steatosis in the liver. Consistently, Shp2 deficiency was associated with decreased ethanol-evoked activation of extracellular signal-regulated kinase (ERK) and oxidative stress in the liver. Moreover, primary hepatocytes with Shp2 deficiency exhibited similar outcomes to those observed upon Shp2 disruption in vivo, including diminished ethanol-induced ERK activation, inflammation, and oxidative stress. Furthermore, pharmacological inhibition of ERK in primary hepatocytes mimicked the effects of Shp2 deficiency and attenuated oxidative stress caused by ethanol. SIGNIFICANCE Collectively, these findings highlight Shp2 as a modulator of hepatic oxidative stress upon ethanol challenge and suggest the evaluation of this phosphatase as a potential therapeutic target for ALD.
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Affiliation(s)
- Ming-Fo Hsu
- Department of Nutrition, University of California Davis, Davis, CA 95616, USA.
| | - Grace LeBleu
- Department of Nutrition, University of California Davis, Davis, CA 95616, USA
| | - Lizbeth Flores
- Department of Nutrition, University of California Davis, Davis, CA 95616, USA
| | - Amy Parkhurst
- Department of Nutrition, University of California Davis, Davis, CA 95616, USA
| | - Laura E Nagy
- Department of Inflammation and Immunity, Cleveland Clinic, Cleveland, OH 44195, USA
| | - Fawaz G Haj
- Department of Nutrition, University of California Davis, Davis, CA 95616, USA; Comprehensive Cancer Center, University of California Davis, Sacramento, CA 95817, USA; Division of Endocrinology, Diabetes, and Metabolism, Department of Internal Medicine, University of California Davis, Sacramento, CA 95817, USA.
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3
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Wang H, Shen H, Seo W, Hwang S. Experimental models of fatty liver diseases: Status and appraisal. Hepatol Commun 2023; 7:e00200. [PMID: 37378635 DOI: 10.1097/hc9.0000000000000200] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/24/2023] [Accepted: 05/16/2023] [Indexed: 06/29/2023] Open
Abstract
Fatty liver diseases, including alcohol-associated liver disease (ALD) and nonalcoholic fatty liver disease nonalcoholic fatty liver disease (NAFLD), affect a large number of people worldwide and become one of the major causes of end-stage liver disease, such as liver cirrhosis and hepatocellular carcinoma (HCC). Unfortunately, there are currently no approved pharmacological treatments for ALD or NAFLD. This situation highlights the urgent need to explore new intervention targets and discover effective therapeutics for ALD and NAFLD. The lack of properly validated preclinical disease models is a major obstacle to the development of clinical therapies. ALD and NAFLD models have been in the development for decades, but there are still no models that recapitulate the full spectrum of ALD and NAFLD. Throughout this review, we summarize the current in vitro and in vivo models used for research on fatty liver diseases and discuss the advantages and limitations of these models.
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Affiliation(s)
- Hua Wang
- Department of Oncology, The First Affiliated Hospital of Anhui Medical University, Hefei, China
- Inflammation and Immune Mediated Diseases Laboratory of Anhui Province, Anhui Medical University, Hefei, China
| | - Haiyuan Shen
- Department of Oncology, The First Affiliated Hospital of Anhui Medical University, Hefei, China
- Inflammation and Immune Mediated Diseases Laboratory of Anhui Province, Anhui Medical University, Hefei, China
| | - Wonhyo Seo
- Laboratory of Hepatotoxicity, College of Pharmacy, Ewha Womans University, Seoul, Republic of Korea
| | - Seonghwan Hwang
- College of Pharmacy and Research Institute for Drug Development, Pusan National University, Busan, Republic of Korea
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Zhu L, Li HD, Xu JJ, Li JJ, Cheng M, Meng XM, Huang C, Li J. Advancements in the Alcohol-Associated Liver Disease Model. Biomolecules 2022; 12:biom12081035. [PMID: 36008929 PMCID: PMC9406170 DOI: 10.3390/biom12081035] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2022] [Revised: 07/22/2022] [Accepted: 07/25/2022] [Indexed: 02/06/2023] Open
Abstract
Alcohol-associated liver disease (ALD) is an intricate disease that results in a broad spectrum of liver damage. The presentation of ALD can include simple steatosis, steatohepatitis, liver fibrosis, cirrhosis, and even hepatocellular carcinoma (HCC). Effective prevention and treatment strategies are urgently required for ALD patients. In previous decades, numerous rodent models were established to investigate the mechanisms of alcohol-associated liver disease and explore therapeutic targets. This review provides a summary of the latest developments in rodent models, including those that involve EtOH administration, which will help us to understand the characteristics and causes of ALD at different stages. In addition, we discuss the pathogenesis of ALD and summarize the existing in vitro models. We analyse the pros and cons of these models and their translational relevance and summarize the insights that have been gained regarding the mechanisms of alcoholic liver injury.
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Affiliation(s)
| | | | | | | | | | - Xiao-Ming Meng
- Correspondence: (X.-M.M.); (C.H.); (J.L.); Tel.: +86-551-65161001 (J.L.); Fax: +86-551-65161001 (J.L.)
| | - Cheng Huang
- Correspondence: (X.-M.M.); (C.H.); (J.L.); Tel.: +86-551-65161001 (J.L.); Fax: +86-551-65161001 (J.L.)
| | - Jun Li
- Correspondence: (X.-M.M.); (C.H.); (J.L.); Tel.: +86-551-65161001 (J.L.); Fax: +86-551-65161001 (J.L.)
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The Use of Chitosan-Coated Nanovesicles in Repairing Alcohol-Induced Damage of Liver Cells in Mice. MEDICINA (KAUNAS, LITHUANIA) 2022; 58:medicina58060762. [PMID: 35744025 PMCID: PMC9229649 DOI: 10.3390/medicina58060762] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/30/2022] [Revised: 05/28/2022] [Accepted: 06/03/2022] [Indexed: 11/30/2022]
Abstract
Background and Objectives In the past few decades, the studies concerning the natural polysaccharide chitosan have been centered on a new direction: its hepatoprotective action. The aim of our study was to evaluate the influence of previously designed chitosan lipid vesicles on the liver damage induced by alcohol consumption in mice. Materials and Methods The study involved the oral administration of substances in one daily dose as follows: Group 1 (control): water; Group 2 (control alcohol): 5% alcohol in water; Group 3 (CHIT): 0.1 mL/10 g body weight chitosan solution in animals treated with alcohol; Group 4 (CHIT-ves): 0.1 mL/10 g body chitosan vesicles in animals treated with alcohol; Group 5 (AcA): 200 mg/kg body ascorbic acid in animals treated with alcohol. In order to evaluate liver damage after alcohol consumption, the following hematological parameters were tested: the activity of alanine aminotransferase, aspartate aminotransferase and lactate dehydrogenase; serum values of urea and creatinine; the phagocytic capacity of polymorphonuclear neutrophilsin peripheral blood;serum opsonic capacity;bactericidal capacity of peritoneal macrophages; and the activity of malondialdehyde, glutathione peroxidase, superoxide dismutase and lactate dehydrogenase. Results and Conclusions The treatment with chitosan vesicles decreased liver enzyme activity and reduced the oxidative stress disturbances in alcoholic mice, thus repairing the hepatic functional and structural damages. These beneficial activities of chitosan vesicles were comparable with ascorbic acid effects in alcoholic mice.
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Liu SX, Du YC, Zeng T. A mini-review of the rodent models for alcoholic liver disease: shortcomings, application, and future prospects. Toxicol Res (Camb) 2021; 10:523-530. [PMID: 34141166 DOI: 10.1093/toxres/tfab042] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2021] [Revised: 04/12/2021] [Accepted: 04/15/2021] [Indexed: 12/19/2022] Open
Abstract
Rodents are the most common models in studies of alcoholic liver disease (ALD). Although several rodents ALD models have been established and multiple mechanisms have been elucidated based on them, these models have some non-negligible shortcomings, specifically only inducing early stage (mainly steatosis, slight to moderate steatohepatitis) but not the whole spectrum of human ALD. The resistance of rodents to advanced ALD has been suggested to be due to the physiological differences between rodents and human beings. Previous studies have reported significant interstrain differences in the susceptibility to ethanol-induced liver injury and in the manifestation of ALD (such as different alteration of lipid profiles). Therefore, it would be interesting to characterize the manifestation of ethanol-induced liver damage in various rodents, which may provide a recommendation to investigators of ALD. Furthermore, more severe ALD models need to be established for the study of serious ALD forms, which may be achieved by using genetic modified rodents.
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Affiliation(s)
- Shi-Xuan Liu
- Institute of Toxicology, School of Public Health, Cheeloo College of Medicine, Shandong University, 44 Wenhua Xi Road, Jinan, Shandong, 250012, China
| | - Yan-Chao Du
- Jinan Institute for Product Quality Inspection, 1311 Longao Bei Road, Jinan, Shandong, 250102, China
| | - Tao Zeng
- Institute of Toxicology, School of Public Health, Cheeloo College of Medicine, Shandong University, 44 Wenhua Xi Road, Jinan, Shandong, 250012, China
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Zhang Y, Sun Y, Zhang Y, Miao Q, Wang Q, Yang B, Li Y, Li L, Zhang R. Nuclear factor Y participates in alcoholic liver disease by activating SREBP1 expression in mice. Biochem Biophys Res Commun 2021; 541:90-94. [PMID: 33485268 DOI: 10.1016/j.bbrc.2021.01.011] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2021] [Accepted: 01/05/2021] [Indexed: 01/11/2023]
Abstract
Chronic and excessive alcohol consumption leads to alcoholic liver disease (ALD). However, the molecular mechanisms in the regulation of ALD have not been fully deciphered. Liver lipid accumulation is an important research direction in ALD. In this study, the physiological role of nuclear factor Y (NF-Y) in ALD and the related mechanisms were investigated using murine hepatocytes and an ethanol-induced liver injury mouse model. In this study, ethanol promoted hepatic NF-Y expression in a mouse model and Hepa1-6 mouse hepatocytes. Lentivirus-mediated NF-Y overexpression in Hepa1-6 cells markedly increased sterol regulatory element binding protein 1 (SREBP1) and fatty acid synthase (FASN) expression compared with empty vector control cells. Conversely, CRISPR/Cas9-mediated knockdown of NF-Y subunit A (NF-YA) attenuated FASN and SREBP1 expression. Mechanistically, luciferase reporter gene assays and chromatin immunoprecipitation (ChIP) analysis indicated that NF-Y activates the transcription of SREBP1 by directly binding to the CCAAT regulatory sequence motif in the promoter. Overall, our results reveal a previously unrecognized physiological function of NF-Y in ALD by activating sterol regulatory element-binding protein 1 (SREBP1). Modulation of hepatic NF-Y expression may therefore offer an attractive therapeutic approach to manage ALD.
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Affiliation(s)
- Yanjie Zhang
- Henan Key Laboratory of Biological Psychiatry, The Second Affiliated Hospital of Xinxiang Medical University, Xinxiang, 453002, Henan Province, China
| | - Yajun Sun
- Department of Pharmacy, The Second Affiliated Hospital of Xinxiang Medical University, Xinxiang, 453002, Henan Province, China
| | - Yange Zhang
- Institute of Oceanography, Minjiang University, Fuzhou, 350108, Fujian Province, China
| | - Qin Miao
- Department of Addiction, Second Affiliated Hospital of Xinxiang Medical University, Xinxiang, 453002, Henan Province, China
| | - Qi Wang
- Henan Key Laboratory of Biological Psychiatry, The Second Affiliated Hospital of Xinxiang Medical University, Xinxiang, 453002, Henan Province, China
| | - Bin Yang
- Henan Key Laboratory of Biological Psychiatry, The Second Affiliated Hospital of Xinxiang Medical University, Xinxiang, 453002, Henan Province, China
| | - Yanzhong Li
- Henan Key Laboratory of Biological Psychiatry, The Second Affiliated Hospital of Xinxiang Medical University, Xinxiang, 453002, Henan Province, China
| | - Lin Li
- Henan Key Laboratory of Biological Psychiatry, The Second Affiliated Hospital of Xinxiang Medical University, Xinxiang, 453002, Henan Province, China
| | - Ruiling Zhang
- Henan Key Laboratory of Biological Psychiatry, The Second Affiliated Hospital of Xinxiang Medical University, Xinxiang, 453002, Henan Province, China.
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8
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Bloomer SA, Broadhurst KA, Maleah Mathahs M, Brown KE. Effects of long-term ethanol ingestion on hepatic iron metabolism in two mouse strains. Clin Exp Pharmacol Physiol 2020; 48:534-542. [PMID: 33319364 DOI: 10.1111/1440-1681.13445] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2020] [Revised: 11/23/2020] [Accepted: 11/26/2020] [Indexed: 01/21/2023]
Abstract
The mechanisms responsible for dysregulation of iron metabolism in response to ethanol ingestion are poorly understood. Relatively brief ethanol exposures in rodents are associated with reduced hepatic hepcidin expression without increases in hepatic iron content. This study evaluated the effects of long-term ethanol treatment on hepatic iron metabolism in two mouse strains. Ethanol was administered in the drinking water to C57BL/6 and BALB/c mice for up to 11 months. Hepatic histology and iron concentrations (HIC) were assessed, along with expression of relevant genes and proteins by real-time RT-PCR and western blot, respectively. The livers of ethanol-consuming mice of both strains showed mild steatosis without inflammation or fibrosis. Stainable hepatocyte iron was modestly increased in both strains ingesting ethanol, although hepatic iron concentrations were significantly higher only in C57BL/6 mice. Long-term ethanol did not affect hepcidin mRNA (Hamp1 or Hamp2) in either strain, nor was the expression of several oxidative stress-responsive genes (glutamate cysteine ligase, gamma-glutamyl transpeptidase, heme oxygenase-1 and growth differentiation factor 15) altered in response to ethanol, suggesting that oxidative stress and suppression of hepcidin expression in short-term ethanol feeding models may be transient phenomena that resolve as mice adapt to ethanol exposure. This murine model of chronic ethanol ingestion demonstrates modest increases in hepatic iron without changes in hepcidin expression, markers of oxidative stress or significant histologic liver injury. Further investigations are needed to characterize the mechanisms of dysregulated iron metabolism resulting from chronic ethanol ingestion.
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Affiliation(s)
- Steven A Bloomer
- Division of Science and Engineering, Penn State Abington, Abington, PA, USA
| | - Kimberly A Broadhurst
- Division of Gastroenterology-Hepatology, Department of Internal Medicine, University of Iowa Carver College of Medicine, Iowa City, IA, USA
| | - M Maleah Mathahs
- Division of Gastroenterology-Hepatology, Department of Internal Medicine, University of Iowa Carver College of Medicine, Iowa City, IA, USA
| | - Kyle E Brown
- Division of Gastroenterology-Hepatology, Department of Internal Medicine, University of Iowa Carver College of Medicine, Iowa City, IA, USA.,Iowa City Veterans Administration Medical Center, Iowa City, IA, USA.,Program in Free Radical and Radiation Biology, Department of Radiation Oncology, University of Iowa Carver College of Medicine, Iowa City, IA, USA
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9
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Hsu MF, Koike S, Mello A, Nagy LE, Haj FG. Hepatic protein-tyrosine phosphatase 1B disruption and pharmacological inhibition attenuate ethanol-induced oxidative stress and ameliorate alcoholic liver disease in mice. Redox Biol 2020; 36:101658. [PMID: 32769011 PMCID: PMC7408361 DOI: 10.1016/j.redox.2020.101658] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2020] [Revised: 06/29/2020] [Accepted: 07/21/2020] [Indexed: 12/19/2022] Open
Abstract
Alcoholic liver disease (ALD) is a major health problem and a significant cause of liver-related death. Currently, the mainstay for ALD therapy is alcohol abstinence highlighting the need to develop pharmacotherapeutic approaches. Protein-tyrosine phosphatase 1B (PTP1B) is an established regulator of hepatic functions, but its role in ALD is mostly unexplored. In this study, we used mice with liver-specific PTP1B disruption as well as pharmacological inhibition to investigate the in vivo function of this phosphatase in ALD. We report upregulation of hepatic PTP1B in the chronic plus binge mouse model and, importantly, in liver biopsies of alcoholic hepatitis patients. Also, mice with hepatic PTP1B disruption attenuated ethanol-induced injury, inflammation, and steatosis compared with ethanol-fed control animals. Moreover, PTP1B deficiency was associated with decreased ethanol-induced oxidative stress in vivo and ex vivo. Further, pharmacological modulation of oxidative balance in hepatocytes identified diminished oxidative stress as a contributor to the salutary effects of PTP1B deficiency. Notably, PTP1B pharmacological inhibition elicited beneficial effects and mitigated hepatic injury, inflammation, and steatosis caused by ethanol feeding. In summary, these findings causally link hepatic PTP1B and ALD and define a potential therapeutic target for the management of this disease.
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Affiliation(s)
- Ming-Fo Hsu
- Department of Nutrition, University of California Davis, One Shields Ave, Davis, CA, 95616, USA.
| | - Shinichiro Koike
- Department of Nutrition, University of California Davis, One Shields Ave, Davis, CA, 95616, USA
| | - Aline Mello
- Department of Nutrition, University of California Davis, One Shields Ave, Davis, CA, 95616, USA
| | - Laura E Nagy
- Department of Inflammation and Immunity, Cleveland Clinic Foundation, Cleveland, OH, 44195, USA
| | - Fawaz G Haj
- Department of Nutrition, University of California Davis, One Shields Ave, Davis, CA, 95616, USA; Comprehensive Cancer Center, University of California Davis, Sacramento, CA, 95817, USA; Division of Endocrinology, Diabetes, and Metabolism, Department of Internal Medicine, University of California Davis, Sacramento, CA, 95817, USA.
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Nevzorova YA, Boyer-Diaz Z, Cubero FJ, Gracia-Sancho J. Animal models for liver disease - A practical approach for translational research. J Hepatol 2020; 73:423-440. [PMID: 32330604 DOI: 10.1016/j.jhep.2020.04.011] [Citation(s) in RCA: 122] [Impact Index Per Article: 30.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/02/2020] [Revised: 04/06/2020] [Accepted: 04/06/2020] [Indexed: 12/11/2022]
Abstract
Animal models are crucial for improving our understanding of human pathogenesis, enabling researchers to identify therapeutic targets and test novel drugs. In the current review, we provide a comprehensive summary of the most widely used experimental models of chronic liver disease, starting from early stages of fatty liver disease (non-alcoholic and alcoholic) to steatohepatitis, advanced cirrhosis and end-stage primary liver cancer. We focus on aspects such as reproducibility and practicality, discussing the advantages and weaknesses of available models for researchers who are planning to perform animal studies in the near future. Additionally, we summarise current and prospective models based on human tissue bioengineering.
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Affiliation(s)
- Yulia A Nevzorova
- Department of Genetics, Physiology and Microbiology, Faculty of Biology, Complutense University, Madrid, Spain; 12 de Octubre Health Research Institute (imas12), Madrid, Spain; Department of Internal Medicine III, University Hospital RWTH Aachen, Aachen, Germany
| | - Zoe Boyer-Diaz
- Liver Vascular Biology Research Group, Barcelona Hepatic Hemodynamic Unit, IDIBAPS Biomedical Research Institute, Barcelona, Spain; Barcelona Liver Bioservices, Barcelona, Spain
| | - Francisco Javier Cubero
- 12 de Octubre Health Research Institute (imas12), Madrid, Spain; Department of Immunology, Ophthalmology & ENT, Complutense University School of Medicine, Madrid, Spain.
| | - Jordi Gracia-Sancho
- Liver Vascular Biology Research Group, Barcelona Hepatic Hemodynamic Unit, IDIBAPS Biomedical Research Institute, Barcelona, Spain; Barcelona Liver Bioservices, Barcelona, Spain; Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBEREHD), Madrid, Spain; Hepatology, Department of Biomedical Research, University of Bern, Bern, Switzerland.
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11
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Jeng KS, Lu SJ, Wang CH, Chang CF. Liver Fibrosis and Inflammation under the Control of ERK2. Int J Mol Sci 2020; 21:ijms21113796. [PMID: 32471201 PMCID: PMC7312875 DOI: 10.3390/ijms21113796] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2020] [Revised: 05/19/2020] [Accepted: 05/25/2020] [Indexed: 12/16/2022] Open
Abstract
Chronic liver injury could lead the formation of liver fibrosis, eventually some would develop to hepatocellular carcinoma (HCC), one of the leading malignancies worldwide. The aim of the study is to dissect the role of extracellular signal-regulated kinase 2 (ERK2) signaling in liver fibrosis and inflammation. The choline-deficient, ethionine-supplemented (CDE) diet could lead to fatty livers and generate oval cells, activate hepatocyte stellate cell (HSC) and recruit immune cells as the liver fibrosis model mice. WT and ERK2 deficient (ERK2−/−) mice were compared in terms of liver weight/body weight, liver function, liver fibrosis markers and the differential gene expression in hepatotoxicity. ERK2−/− mice display the less degree of liver fibrosis when compared to WT mice. The protein level of alpha smooth muscle (α-SMA) was reduced and several hepatocellular carcinoma-related genes such as MMP9, FoxM1 were down-regulated. In addition, the cell proliferation and the percentages of activated T cells were reduced in ERK2−/− mice upon liver injury. Therefore, ERK2 plays an important role in regulating liver cirrhosis and inflammation.
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Guo FF, Xiao M, Wang SY, Zeng T, Cheng L, Xie Q. Downregulation of mitogen-activated protein kinases (MAPKs) in chronic ethanol-induced fatty liver. Toxicol Mech Methods 2020; 30:407-416. [PMID: 32237978 DOI: 10.1080/15376516.2020.1747126] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
Mitogen-activated protein kinases (MAPKs) are versatile proteins that have been suggested to be involved in the regulation of lipid metabolism. This study was designed to investigate the responses of MAPK signaling to chronic ethanol exposure in vivo and in vitro, and try to explore its role in the pathogenesis of alcoholic fatty liver (AFL). Mice were fed with Lieber-Decarli liquid diet (5% ethanol, w/v) for 4 weeks to induce fatty liver, and the chronological changes of MAPK phosphorylation were measured using western blotting. We found that chronic ethanol feeding led to accumulation of triglyceride (TG), decreased phosphorylation of MAPKs, decreased protein level of peroxisomal proliferator activation receptor α (PPARα), and increased protein expression of cytochrome P4502E1 (CYP2E1) in mice liver. In vitro study showed that overexpression of CYP2E1 blunted the response of MAPKs to ethanol, and MAPK phosphatase 1 (MKP-1) knockdown by siRNA led to upregulation of PPARα protein level. Lastly, epidermal growth factor (EGF), a well-known MAPK activator, significantly suppressed chronic ethanol-induced hepatic fat accumulation and decline of PPARα expression in mice liver. Collectively, MAPK suppression, possibly due to the activation of hepatic CYP2E1, may be involved in chronic ethanol-induced hepatic steatosis.
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Affiliation(s)
- Fang-Fang Guo
- Department of Pharmacy, Qilu Hospital of Shandong University, Jinan, China
| | - Mo Xiao
- Institute of Toxicology, School of Public Health, Shandong University, Jinan, China
| | - Shao-Yi Wang
- Department of Orthopaedic Surgery, Qilu Hospital of Shandong University, Jinan, China
| | - Tao Zeng
- Institute of Toxicology, School of Public Health, Shandong University, Jinan, China
| | - Lei Cheng
- Department of Orthopaedic Surgery, Qilu Hospital of Shandong University, Jinan, China
| | - Qing Xie
- Department of Pharmacy, Qilu Hospital of Shandong University, Jinan, China
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Tsai JJ, Chen JH, Chen CH, Chung JG, Hsu FT. Apoptosis induction and ERK/NF-κB inactivation are associated with magnolol-inhibited tumor progression in hepatocellular carcinoma in vivo. ENVIRONMENTAL TOXICOLOGY 2020; 35:167-175. [PMID: 31714653 DOI: 10.1002/tox.22853] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/23/2019] [Revised: 08/19/2019] [Accepted: 08/21/2019] [Indexed: 06/10/2023]
Abstract
Although hepatitis B and/or hepatitis C virus were recognized as major risk factor for the development of hepatocellular carcinoma (HCC), certain occupational, environmental, and lifestyle factors also play key roles in HCC tumorigenesis. Moreover, in molecular signaling route, extracellular signal-regulated kinase (ERK)/nuclear factor kappa-light-chain-enhancer of activated B cells (NF-κB) signaling was found to be overexpressed and linked to poor prognosis in HCC. Thus, to identify possible nature compound that can suppress ERK/NF-κB may be benefit to HCC patient. Magnolol, a natural compound derived from herbal plant Magnolia officinalis, has been recognized as a liver protection and antitumor reagent. However, whether magnolol-inhibited HCC progression correlates with disruption of ERK/NF-κB signaling is remained unclear. In this studies, we performed SK-Hep1/luc2 HCC bearing animal model to investigate the anticancer efficacy and mechanism of magnolol on tumor progression. Tumor size and tumor growth rate were dramatically suppressed after treatment of magnolol. In addition, expression of phospho-ERK (p-ERK), NF-κB p65 (Ser536), and tumor progression-associated proteins, such as matrix metallopeptidase 9 (MMP-9), vascular endothelial growth factor (VEGF), X-linked inhibitor of apoptosis protein (XIAP), and CyclinD1 were all significantly decreased by magnolol. Most important, major extrinsic and intrinsic apoptosis signaling factors, including active caspase-8 and caspase-9 were both enhanced by magnolol. This study indicated that apoptosis induction through extrinsic/intrinsic pathways and blockage of ERK/NF-κB activation were associated with magnolol-inhibited tumor progression in HCC in vivo.
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Affiliation(s)
- Jai-Jen Tsai
- Division of Gastroenterology, Department of Medicine, National Yang-Ming University Hospital, Yilan, Taiwan, ROC
- Department of Medicine, National Yang-Ming University, Taipei, Taiwan, ROC
| | - Jiann-Hwa Chen
- Department of Emergency Medicine, Cathay General Hospital, Taipei, Taiwan, ROC
- School of Medicine, Fu Jen Catholic University, Taipei, Taiwan, ROC
| | - Cheng Hsien Chen
- Surgical Intensive Care Unit, Department of Surgery, Changhua Show Chwan Memorial Hospital, Changhua, Taiwan, ROC
| | - Jing-Gung Chung
- Department of Biological Science and Technology, China Medical University, Taichung, Taiwan, ROC
- Department of Biotechnology, Asia University, Taichung, Taiwan, ROC
| | - Fei-Ting Hsu
- Department of Biological Science and Technology, China Medical University, Taichung, Taiwan, ROC
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14
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Feng HZ, Jin JP. Transgenic expression of carbonic anhydrase III in cardiac muscle demonstrates a mechanism to tolerate acidosis. Am J Physiol Cell Physiol 2019; 317:C922-C931. [PMID: 31390226 DOI: 10.1152/ajpcell.00130.2019] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Carbonic anhydrase III (CAIII) is abundant in liver, adipocytes, and skeletal muscles, but not heart. A cytosolic enzyme that catalyzes conversions between CO2 and HCO3- in the regulation of intracellular pH, its physiological role in myocytes is not fully understood. Mouse skeletal muscles lacking CAIII showed lower intracellular pH during fatigue, suggesting its function in stress tolerance. We created transgenic mice expressing CAIII in cardiomyocytes that lack endogenous CAIII. The transgenic mice showed normal cardiac development and life span under nonstress conditions. Studies of ex vivo working hearts under normal and acidotic conditions demonstrated that the transgenic and wild-type mouse hearts had similar pumping functions under normal pH. At acidotic pH, however, CAIII transgenic mouse hearts showed significantly less decrease in cardiac function than that of wild-type control as shown by higher ventricular pressure development, systolic and diastolic velocities, and stroke volume via elongating the time of diastolic ejection. In addition to the effect of introducing CAIII into cardiomyocytes on maintaining homeostasis to counter acidotic stress, the results demonstrate the role of carbonic anhydrases in maintaining intracellular pH in muscle cells as a potential mechanism to treat heart failure.
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Affiliation(s)
- Han-Zhong Feng
- Department of Physiology, Wayne State University School of Medicine, Detroit, Michigan
| | - J-P Jin
- Department of Physiology, Wayne State University School of Medicine, Detroit, Michigan
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15
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Shukla SD, Restrepo R, Aroor AR, Liu X, Lim RW, Franke JD, Ford DA, Korthuis RJ. Binge Alcohol Is More Injurious to Liver in Female than in Male Rats: Histopathological, Pharmacologic, and Epigenetic Profiles. J Pharmacol Exp Ther 2019; 370:390-398. [PMID: 31262967 DOI: 10.1124/jpet.119.258871] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2019] [Accepted: 06/19/2019] [Indexed: 12/20/2022] Open
Abstract
Binge alcohol consumption is a health problem, but differences between the sexes remain poorly defined. We have examined the in vivo effects of three acute, repeat binge alcohol administration on the liver in male and female rats. Sprague-Dawley rats were gavaged with alcohol (5 g/kg body weight) three times at 12-hour intervals. Blood and liver tissues were collected 4 hours after the last binge ethanol. Subsequently, several variables were analyzed. Compared with male rats, females had higher levels of blood alcohol, alanine aminotransferase, and triglycerides. Liver histology showed increased lipid vesicles that were larger in females. Protein levels of liver cytochrome P4502E1 were higher in the liver of females than in the liver of males after binge. Hepatic phospho-extracellular signal-regulated kinase 1/2 and phosph-p38 mitogen-activated protein kinase levels were lower in females compared with males after binge alcohol, but no differences were found in the phospho-C-jun N-terminal kinase levels. Peroxisome proliferator-activated receptor γ-coactivator 1α and cyclic AMP response element binding (CREB) protein levels increased more in female than in male livers; however, increases in phospho-CREB levels were lower in females. Remarkably, c-fos was reduced substantially in the livers of females, but no differences in c-myc protein were found. Binge ethanol caused elevation in acetylated (H3AcK9) and phosphoacetylated (H3AcK9PS10) histone H3 in both sexes but without any difference. Binge alcohol caused differential alterations in the levels of various species of phosphatidylethanol and a larger increase in the diacylglycerol kinase-α protein levels in the liver of female rats compared with male rats. These data demonstrate, for the first time, similarities and differences in the sex-specific responses to repeat binge alcohol leading to an increased susceptibility of female rats to have liver injury in vivo. SIGNIFICANCE STATEMENT: This study examines the molecular responses of male and female rat livers to acute binge alcohol in vivo and demonstrates significant differences in the susceptibility between sexes.
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Affiliation(s)
- Shivendra D Shukla
- Department of Medical Pharmacology and Physiology, School of Medicine, University of Missouri, Columbia (S.D.S.,R.R.,A.R.A.,X.L.,R.W.L.,R.J.K.), and Department of Biochemistry and Molecular Biology and Center for Cardiovascular Research, Saint Louis University, St. Louis (J.D.F.,D.A.F.), Missouri
| | - Ricardo Restrepo
- Department of Medical Pharmacology and Physiology, School of Medicine, University of Missouri, Columbia (S.D.S.,R.R.,A.R.A.,X.L.,R.W.L.,R.J.K.), and Department of Biochemistry and Molecular Biology and Center for Cardiovascular Research, Saint Louis University, St. Louis (J.D.F.,D.A.F.), Missouri
| | - Annayya R Aroor
- Department of Medical Pharmacology and Physiology, School of Medicine, University of Missouri, Columbia (S.D.S.,R.R.,A.R.A.,X.L.,R.W.L.,R.J.K.), and Department of Biochemistry and Molecular Biology and Center for Cardiovascular Research, Saint Louis University, St. Louis (J.D.F.,D.A.F.), Missouri
| | - Xuanyou Liu
- Department of Medical Pharmacology and Physiology, School of Medicine, University of Missouri, Columbia (S.D.S.,R.R.,A.R.A.,X.L.,R.W.L.,R.J.K.), and Department of Biochemistry and Molecular Biology and Center for Cardiovascular Research, Saint Louis University, St. Louis (J.D.F.,D.A.F.), Missouri
| | - Robert W Lim
- Department of Medical Pharmacology and Physiology, School of Medicine, University of Missouri, Columbia (S.D.S.,R.R.,A.R.A.,X.L.,R.W.L.,R.J.K.), and Department of Biochemistry and Molecular Biology and Center for Cardiovascular Research, Saint Louis University, St. Louis (J.D.F.,D.A.F.), Missouri
| | - Jacob D Franke
- Department of Medical Pharmacology and Physiology, School of Medicine, University of Missouri, Columbia (S.D.S.,R.R.,A.R.A.,X.L.,R.W.L.,R.J.K.), and Department of Biochemistry and Molecular Biology and Center for Cardiovascular Research, Saint Louis University, St. Louis (J.D.F.,D.A.F.), Missouri
| | - David A Ford
- Department of Medical Pharmacology and Physiology, School of Medicine, University of Missouri, Columbia (S.D.S.,R.R.,A.R.A.,X.L.,R.W.L.,R.J.K.), and Department of Biochemistry and Molecular Biology and Center for Cardiovascular Research, Saint Louis University, St. Louis (J.D.F.,D.A.F.), Missouri
| | - Ronald J Korthuis
- Department of Medical Pharmacology and Physiology, School of Medicine, University of Missouri, Columbia (S.D.S.,R.R.,A.R.A.,X.L.,R.W.L.,R.J.K.), and Department of Biochemistry and Molecular Biology and Center for Cardiovascular Research, Saint Louis University, St. Louis (J.D.F.,D.A.F.), Missouri
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16
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Gao H, Lv Y, Liu Y, Li J, Wang X, Zhou Z, Tipoe GL, Ouyang S, Guo Y, Zhang J, Hao X, Li W, Koike K, So KF, Xiao J. Wolfberry-Derived Zeaxanthin Dipalmitate Attenuates Ethanol-Induced Hepatic Damage. Mol Nutr Food Res 2019; 63:e1801339. [PMID: 30938072 DOI: 10.1002/mnfr.201801339] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2018] [Revised: 03/06/2019] [Indexed: 11/11/2022]
Abstract
SCOPE Besides abstinence and nutritional support, there is no proven clinical treatment for patients with alcoholic fatty liver disease (AFLD). Here, the therapeutic effects and mechanisms of action of wolfberry-derived zeaxanthin dipalmitate (ZD) on AFLD models are demonstrated. METHODS AND RESULTS The hepatoprotective effects of ZD are evaluated in vitro and in vivo. Direct interacting receptors of ZD on cell membranes are identified by liver-specific knockdown and biophysical measurements. Downstream signaling pathways are delineated using molecular and cellular biological methods. It is demonstrated that ZD attenuates hepatocyte and whole-liver injury in ethanol-treated cells (dose: 1 µm) and a chronic binge AFLD rat model (dose: 10 mg kg-1 ), respectively. The direct targets of ZD on the cell membrane include receptor P2X7 and adiponectin receptor 1 (adipoR1). Signals from P2X7 and adipoR1 modulate the phosphatidylinositide 3-kinase-Akt and/or AMP-activated protein kinase-FoxO3a pathways, to restore mitochondrial autophagy (mitophagy) functions suppressed by ethanol intoxication. In addition, ZD alleviates hepatic inflammation partially via the inhibition of Nod-like receptor 3 inflammasome, whose activation is a direct consequence of suppressed mitophagy. Liver-specific inhibition of receptors or mitophagy significantly impairs the beneficial effects of ZD. CONCLUSIONS ZD is an effective and promising agent for the potential treatment of AFLD.
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Affiliation(s)
- Hao Gao
- Institute of Traditional Chinese Medicine and Natural Products, College of Pharmacy, Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research, Jinan University, Guangzhou, China.,Clinical Medicine Research Institute, The First Affiliated Hospital of Jinan University, Guangzhou, China
| | - Yi Lv
- Laboratory of Neuroendocrinology, School of Biological Sciences, Fujian Normal University, Fuzhou, China
| | - Yingxia Liu
- State Key Discipline of Infectious Diseases, Department of Infectious Diseases, Shenzhen Third People's Hospital, Shenzhen, China
| | - Jingjing Li
- GMH Institute of CNS Regeneration, Guangdong Medical Key Laboratory of Brain Function and Diseases, Jinan University, Guangzhou, China
| | - Xiaogang Wang
- Beijing Advanced Innovation Center for Big Data-Based Precision Medicine, Beihang University, Beijing, China
| | - Zhengqun Zhou
- Institute of Traditional Chinese Medicine and Natural Products, College of Pharmacy, Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research, Jinan University, Guangzhou, China
| | - George L Tipoe
- School of Biomedical Sciences, The University of Hong Kong, Pokfulam, Hong Kong
| | - Songying Ouyang
- Laboratory of Neuroendocrinology, School of Biological Sciences, Fujian Normal University, Fuzhou, China
| | - Yutong Guo
- Yinchuan Bairuiyuan Biotechnology, Yinchuan, China
| | | | | | - Wei Li
- Faculty of Pharmaceutical Sciences, Toho University, Chiba, Japan
| | - Kazuo Koike
- Faculty of Pharmaceutical Sciences, Toho University, Chiba, Japan
| | - Kwok-Fai So
- GMH Institute of CNS Regeneration, Guangdong Medical Key Laboratory of Brain Function and Diseases, Jinan University, Guangzhou, China
| | - Jia Xiao
- Clinical Medicine Research Institute, The First Affiliated Hospital of Jinan University, Guangzhou, China.,School of Biomedical Sciences, The University of Hong Kong, Pokfulam, Hong Kong
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17
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Wang M, Ma LJ, Yang Y, Xiao Z, Wan JB. n-3 Polyunsaturated fatty acids for the management of alcoholic liver disease: A critical review. Crit Rev Food Sci Nutr 2018; 59:S116-S129. [PMID: 30580553 DOI: 10.1080/10408398.2018.1544542] [Citation(s) in RCA: 83] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Excess alcohol exposure leads to alcoholic liver disease (ALD), a predominant cause of liver-related morbidity and mortality worldwide. In the past decade, increasing attention has been paid to understand the association between n-3 polyunsaturated fatty acids (n-3 PUFAs) and ALD. In this review, we summarize the metabolism of n-3 PUFAs, animal model of ALD, and the findings from recent studies determining the role of n-3 PUFAs in ALD as a possible treatment. The animal models of acute ethanol exposure, chronic ethanol exposure and chronic-plus-single binge ethanol feeding have been widely used to explore the impact of n-3 PUFAs. Although the results of studies regarding the role of n-3 PUFAs in ALD have been inconsistent or controversial, increasing evidence has demonstrated that n-3 PUFAs may be useful in alleviating alcoholic steatosis and alcohol-induced liver injury through multiple mechanisms, including decreased de novo lipogenesis and lipid mobilization from adipose tissue, enhanced mitochondrial fatty acid β-oxidation, reduced hepatic inflammation and oxidative stress, and promoted intestinal homeostasis, positively suggesting that n-3 PUFAs might be promising for the management of ALD. The oxidation of n-3 PUFAs ex vivo in an experimental diet was rarely considered in most n-3 PUFA-related studies, likely contributing to the inconsistent results. Thus, the role of n-3 PUFAs in ALD deserves greater research efforts and remains to be evaluated in randomized, placebo-controlled clinic trial. ABBREVIATION AA arachidonic acid ACC acetyl-CoA carboxylase ACLY ATP-citrate lyase ACO acyl-CoA oxidase ALA α-linolenic acid ALD alcoholic liver disease ALP alkaline phosphatase ALT alanine aminotransferase AMPK AMP-activated protein kinase AST aspartate aminotransferase ATGL adipose triglyceride lipase cAMP cyclic adenosine 3',5'-monophosphate COX cyclooxygenases CPT1 carnitine palmitoyltransferase 1 CYP2E1 cytochrome P450 2E1 DGAT2 diacylglycerol acyltransferase 2 DGLA dihomo-γ-linolenic acid DHA docosahexaenoic acid DPA docosapentaenoic acid DTA docosatetraenoic acid EPA eicosapentaenoic acid ER endoplasmic reticulum ETA eicosatetraenoic acid FAS fatty acid synthase FATPs fatty acid transporter proteins GLA,γ linolenic acid GPR120 G protein-coupled receptor 120 GSH glutathione; H&E haematoxylin-eosin; HO-1 heme oxygenase-1; HSL hormone-sensitive lipase; IL-6 interleukin-6 iNOS nitric oxide synthase LA linoleic acid LBP lipopolysaccharide binding protein LOX lipoxygenases LXR liver X receptor LXREs LXR response elements MCP-1 monocyte chemotactic protein-1 MTP microsomal triglyceride transfer protein MUFA monounsaturated fatty acids MyD88 myeloid differentiation factor 88 n-3 PUFAs omega-3 polyunsaturated fatty acid NAFLD nonalcoholic fatty liver disease NASH nonalcoholic steatohepatitis NF-κB transcription factor nuclear factor κB PDE3B phosphodiesterase 3B PPAR peroxisome proliferator-activated receptor ROS reactive oxygen species RXR retinoid X receptor SCD-1 stearyl CoA desaturase-1 SDA stearidonic acid SFA saturated fatty acids SIRT1 sirtuin 1 SOD superoxide dismutase SREBP sterol regulatory element-binding protein TB total bilirubin TC total cholesterol TG triacylglycerol TLR4 Toll-like receptor-4 TNF-α tumor necrosis factor-α VLDLR very low-density lipoprotein receptor WT wild type; ZO-1 zonula occludens-1.
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Affiliation(s)
- Meng Wang
- a State Key Laboratory of Quality Research in Chinese Medicine , Institute of Chinese Medical Sciences, University of Macau , Macao , China.,b Center for Drug Innovation and Discovery, College of Life Science, Hebei Normal University , Shijiazhuang , Hebei , China
| | - Li-Juan Ma
- a State Key Laboratory of Quality Research in Chinese Medicine , Institute of Chinese Medical Sciences, University of Macau , Macao , China
| | - Yan Yang
- c Department of Nutrition, School of Public Health , Sun Yat-Sen University , Guangzhou , China
| | - Zeyu Xiao
- d Collaborative Translational Medicine Collaborative Innovation Center, Department of Pharmacology and Chemical Biology, Institute of Medical Sciences, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Jian-Bo Wan
- a State Key Laboratory of Quality Research in Chinese Medicine , Institute of Chinese Medical Sciences, University of Macau , Macao , China
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18
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Lamas-Paz A, Hao F, Nelson LJ, Vázquez MT, Canals S, Gómez del Moral M, Martínez-Naves E, Nevzorova YA, Cubero FJ. Alcoholic liver disease: Utility of animal models. World J Gastroenterol 2018; 24:5063-5075. [PMID: 30568384 PMCID: PMC6288648 DOI: 10.3748/wjg.v24.i45.5063] [Citation(s) in RCA: 79] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/18/2018] [Revised: 11/08/2018] [Accepted: 11/09/2018] [Indexed: 02/06/2023] Open
Abstract
Alcoholic liver disease (ALD) is a major cause of acute and chronic liver injury. Extensive evidence has been accumulated on the pathological process of ALD during the past decades. However, effective treatment options for ALD are very limited due to the lack of suitable in vivo models that recapitulate the full spectrum of ALD. Experimental animal models of ALD, particularly rodents, have been used extensively to mimic human ALD. An ideal animal model should recapitulate all aspects of the ALD process, including significant steatosis, hepatic neutrophil infiltration, and liver injury. A better strategy against ALD depends on clear diagnostic biomarkers, accurate predictor(s) of its progression and new therapeutic approaches to modulate stop or even reverse the disease. Numerous models employing rodent animals have been established in the last decades to investigate the effects of acute and chronic alcohol exposure on the initiation and progression of ALD. Although significant progress has been made in gaining better knowledge on the mechanisms and pathology of ALD, many features of ALD are unknown, and require further investigation, ideally with improved animal models that more effectively mimic human ALD. Although differences in the degree and stages of alcoholic liver injury inevitably exist between animal models and human ALD, the acquisition and translational relevance will be greatly enhanced with the development of new and improved animal models of ALD.
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Affiliation(s)
- Arantza Lamas-Paz
- Department of Immunology, Ophthalmology and ORL, Complutense University School of Medicine, Madrid 28040, Spain
- Yulia A Nevzovova, Francisco Javier Cubero, 12 de Octubre Health Research Institute (imas12), Madrid 28041, Spain
| | - Fengjie Hao
- Department of Immunology, Ophthalmology and ORL, Complutense University School of Medicine, Madrid 28040, Spain
- Yulia A Nevzovova, Francisco Javier Cubero, 12 de Octubre Health Research Institute (imas12), Madrid 28041, Spain
| | - Leonard J Nelson
- Institute for Bioengineering (IBioE), School of Engineering, Faraday Building, The University of Edinburgh, Edinburgh EH9 3 JL, Scotland, United Kingdom
| | - Maria Teresa Vázquez
- Department of Human Anatomy and Embryology, Complutense University School of Medicine, Madrid 28040, Spain
| | - Santiago Canals
- Instituto de Neurociencias, Consejo Superior de Investigaciones Científicas, Universidad Miguel Hernández, San Juan de Alicante 03550, Spain
| | - Manuel Gómez del Moral
- Department of Cell Biology, Complutense University School of Medicine, Madrid 28040, Spain
| | - Eduardo Martínez-Naves
- Department of Immunology, Ophthalmology and ORL, Complutense University School of Medicine, Madrid 28040, Spain
- Yulia A Nevzovova, Francisco Javier Cubero, 12 de Octubre Health Research Institute (imas12), Madrid 28041, Spain
| | - Yulia A Nevzorova
- Department of Genetics, Physiology and Microbiology, Faculty of Biology, Universidad Complutense, Madrid 28040, Spain
- Department of Internal Medicine III, University Hospital RWTH Aachen, Aachen 52062, Germany
| | - Francisco Javier Cubero
- Department of Immunology, Ophthalmology and ORL, Complutense University School of Medicine, Madrid 28040, Spain
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19
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Guo F, Zheng K, Benedé-Ubieto R, Cubero FJ, Nevzorova YA. The Lieber-DeCarli Diet-A Flagship Model for Experimental Alcoholic Liver Disease. Alcohol Clin Exp Res 2018; 42:1828-1840. [DOI: 10.1111/acer.13840] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2018] [Accepted: 07/09/2018] [Indexed: 02/06/2023]
Affiliation(s)
- Feifei Guo
- Department of Genetics, Physiology and Microbiology; Faculty of Biology; Complutense University of Madrid; Madrid Spain
| | - Kang Zheng
- Department of Immunology, Ophthalmology & ORL; School of Medicine; Complutense University of Madrid; Madrid Spain
- 12 de Octubre Health Research Institute (imas12); Madrid Spain
| | - Raquel Benedé-Ubieto
- Department of Genetics, Physiology and Microbiology; Faculty of Biology; Complutense University of Madrid; Madrid Spain
| | - Francisco Javier Cubero
- Department of Immunology, Ophthalmology & ORL; School of Medicine; Complutense University of Madrid; Madrid Spain
- 12 de Octubre Health Research Institute (imas12); Madrid Spain
| | - Yulia A. Nevzorova
- Department of Genetics, Physiology and Microbiology; Faculty of Biology; Complutense University of Madrid; Madrid Spain
- Department of Internal Medicine III; University Hospital RWTH Aachen; Aachen Germany
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20
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Ghosh Dastidar S, Warner JB, Warner DR, McClain CJ, Kirpich IA. Rodent Models of Alcoholic Liver Disease: Role of Binge Ethanol Administration. Biomolecules 2018; 8:biom8010003. [PMID: 29342874 PMCID: PMC5871972 DOI: 10.3390/biom8010003] [Citation(s) in RCA: 71] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2017] [Revised: 01/09/2018] [Accepted: 01/11/2018] [Indexed: 12/14/2022] Open
Abstract
Both chronic and acute (binge) alcohol drinking are important health and economic concerns worldwide and prominent risk factors for the development of alcoholic liver disease (ALD). There are no FDA-approved medications to prevent or to treat any stage of ALD. Therefore, discovery of novel therapeutic strategies remains a critical need for patients with ALD. Relevant experimental animal models that simulate human drinking patterns and mimic the spectrum and severity of alcohol-induced liver pathology in humans are critical to our ability to identify new mechanisms and therapeutic targets. There are several animal models currently in use, including the most widely utilized chronic ad libitum ethanol (EtOH) feeding (Lieber–DeCarli liquid diet model), chronic intragastric EtOH administration (Tsukamoto–French model), and chronic-plus-binge EtOH challenge (Bin Gao—National Institute on Alcohol Abuse and Alcoholism (NIAAA) model). This review provides an overview of recent advances in rodent models of binge EtOH administration which help to recapitulate different features and etiologies of progressive ALD. These models include EtOH binge alone, and EtOH binge coupled with chronic EtOH intake, a high fat diet, or endotoxin challenge. We analyze the strengths, limitations, and translational relevance of these models, as well as summarize the liver injury outcomes and mechanistic insights. We further discuss the application(s) of binge EtOH models in examining alcohol-induced multi-organ pathology, sex- and age-related differences, as well as circadian rhythm disruption.
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Affiliation(s)
- Shubha Ghosh Dastidar
- Division of Gastroenterology, Hepatology and Nutrition, Department of Medicine, University of Louisville School of Medicine, Louisville, KY 40202, USA.
| | - Jeffrey B Warner
- Division of Gastroenterology, Hepatology and Nutrition, Department of Medicine, University of Louisville School of Medicine, Louisville, KY 40202, USA.
| | - Dennis R Warner
- Division of Gastroenterology, Hepatology and Nutrition, Department of Medicine, University of Louisville School of Medicine, Louisville, KY 40202, USA.
| | - Craig J McClain
- Division of Gastroenterology, Hepatology and Nutrition, Department of Medicine, University of Louisville School of Medicine, Louisville, KY 40202, USA.
- Department of Pharmacology and Toxicology, University of Louisville School of Medicine, Louisville, KY 40202, USA.
- Robley Rex Veterans Medical Center, Louisville, KY 40202, USA.
- University of Louisville Alcohol Research Center and Hepatobiology & Toxicology COBRE, University of Louisville, Louisville, KY 40202, USA.
| | - Irina A Kirpich
- Division of Gastroenterology, Hepatology and Nutrition, Department of Medicine, University of Louisville School of Medicine, Louisville, KY 40202, USA.
- Department of Pharmacology and Toxicology, University of Louisville School of Medicine, Louisville, KY 40202, USA.
- University of Louisville Alcohol Research Center and Hepatobiology & Toxicology COBRE, University of Louisville, Louisville, KY 40202, USA.
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21
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Restrepo RJ, Lim RW, Korthuis RJ, Shukla SD. Binge alcohol alters PNPLA3 levels in liver through epigenetic mechanism involving histone H3 acetylation. Alcohol 2017; 60:77-82. [PMID: 28433418 DOI: 10.1016/j.alcohol.2017.01.009] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2016] [Accepted: 01/10/2017] [Indexed: 02/06/2023]
Abstract
The human PNPLA3 (patatin-like phospholipase domain-containing 3) gene codes for a protein which is highly expressed in adipose tissue and liver, and is implicated in lipid homeostasis. While PNPLA3 protein contains regions homologous to functional lipolytic proteins, the regulation of its tissue expression is reflective of lipogenic genes. A naturally occurring genetic variant of PNPLA3 in humans has been linked to increased susceptibility to alcoholic liver disease. We have examined the modulatory effect of alcohol on PNPLA3 protein and mRNA expression as well as the association of its gene promoter with acetylated histone H3K9 by chromatin immunoprecipitation (ChIP) assay in rat hepatocytes in vitro, and in vivo in mouse and rat models of acute binge, chronic, and chronic followed by acute binge ethanol administration. Protein expression of PNPLA3 was significantly increased by alcohol in all three models used. PNPLA3 mRNA also increased, albeit to a varying degree. ChIP assay using H3AcK9 antibody showed increased association with the promoter of PNPLA3 in hepatocytes and in mouse liver. This was less evident in rat livers in vivo except under chronic treatment. It is concluded for the first time that histone acetylation plays a role in the modulation of PNPLA3 levels in the liver exposed to binge ethanol both in vitro and in vivo.
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22
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Matsumoto A, Thompson DC, Chen Y, Kitagawa K, Vasiliou V. Roles of defective ALDH2 polymorphism on liver protection and cancer development. Environ Health Prev Med 2016; 21:395-402. [PMID: 27714678 DOI: 10.1007/s12199-016-0579-2] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2016] [Accepted: 08/25/2016] [Indexed: 12/12/2022] Open
Abstract
Because serum transaminases elevate alcohol dose dependently as a consequence of liver injury, they serve as useful biological markers of excessive drinking. However, these markers are inadequate in individuals with a defective allele of the aldehyde dehydrogenase 2 gene, ALDH2*2, because they show a different correlation with the amount of ethanol. For example, the serum alanine aminotransferase (ALT) level could become even lower than the baseline after alcohol intake in ALDH2*2 carriers. In fact, multiple studies suggest that ALDH2*2 is a hepato-protective factor in healthy individuals. Importantly, excessive drinking is particularly dangerous in carriers of ALDH2*2 because the risk of alcohol-related cancer is much higher than that for ALDH2*1/*1 carriers. Without recognizing the genotype interaction on serum transaminase, the opportunity to warn people about potential cancer risks is missed owing to incorrect interpretation. This is particularly important in East Asian countries where approximately half of the population carries the ALDH2*2 allele. To date, the mechanism of liver protection from ethanol load in individuals with ALDH2*2 has not been fully elucidated. However, some reasonable mechanisms have been suggested by experimental studies, including remodelling of detoxifying systems. Further studies to uncover the whole mechanism are anticipated.
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Affiliation(s)
- Akiko Matsumoto
- Department of Social Medicine, Saga University School of Medicine, Saga, 849-8501, Japan.
| | - David C Thompson
- Department of Clinical Pharmacy, University of Colorado School of Pharmacy, 12850 E. Aurora, Denver, CO, 80045, USA
| | - Ying Chen
- Department of Environmental Health Sciences, Yale School of Public Health, New Haven, CT, 06520-8034, USA
| | - Kyoko Kitagawa
- Department of Molecular Biology, Hamamatsu University School of Medicine, Hamamatsu, 431-3125, Japan
| | - Vasilis Vasiliou
- Department of Environmental Health Sciences, Yale School of Public Health, New Haven, CT, 06520-8034, USA
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Wang HJ, Murray GJ, Jung MK. Host homeostatic responses to alcohol-induced cellular stress in animal models of alcoholic liver disease. Expert Rev Gastroenterol Hepatol 2016; 9:1193-205. [PMID: 26293978 DOI: 10.1586/17474124.2015.1069705] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Humans develop various clinical phenotypes of severe alcoholic liver disease, including alcoholic hepatitis and cirrhosis, generally after decades of heavy drinking. In such individuals, following each episode of drinking, their livers experience heightened intracellular and extracellular stresses that are closely associated with alcohol consumption and alcohol metabolism. This article focuses on the latest advances made in animal models on evolutionarily conserved homeostatic mechanisms for coping with and resolving these stress conditions. The mechanisms discussed include the stress-activated protein kinase JNK, energy regulator AMPK, autophagy and the inflammatory response. Over time, the host may respond variably to stress with protective mechanisms that are critical in determining an individual's vulnerability to developing severe alcoholic liver disease. A systematic review of these mechanisms and their temporal changes in animal models provides the basis for general conclusions, and raises questions for future studies. The relevance of these data to human conditions is also discussed.
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Affiliation(s)
- He Joe Wang
- a Division of Metabolism and Health Effect, National Institute of Alcohol Abuse and Alcoholism/NIH, 5635 Fishers Lane, MSC 9304, Bethesda, MD 20892-9304, USA
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Bukong TN, Iracheta-Vellve A, Gyongyosi B, Ambade A, Catalano D, Kodys K, Szabo G. Therapeutic Benefits of Spleen Tyrosine Kinase Inhibitor Administration on Binge Drinking-Induced Alcoholic Liver Injury, Steatosis, and Inflammation in Mice. Alcohol Clin Exp Res 2016; 40:1524-30. [PMID: 27177528 PMCID: PMC4930418 DOI: 10.1111/acer.13096] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2016] [Accepted: 04/06/2016] [Indexed: 12/13/2022]
Abstract
BACKGROUND Binge drinking is increasingly recognized as an important cause of liver disease with limited therapeutic options for patients. Binge alcohol use, similar to chronic alcohol consumption, induces numerous deregulated signaling events that drive liver damage, steatosis, and inflammation. In this article, we evaluated the role of spleen tyrosine kinase (SYK), which modulates numerous signaling events previously identified linked in the development alcohol-induced liver pathology. METHODS A 3-day alcohol binge was administered to C57BL/6 female mice, and features of alcoholic liver disease were assessed. Some mice were treated daily with intraperitoneal injections of a SYK inhibitor (R406; 5 to 10 mg/kg body weight) or drug vehicle control. Liver and serum samples were collected and were assessed by Western blotting, biochemical, ELISA, electrophoretic mobility shift assays, real-time quantitative polymerase chain reaction, and histopathological analysis. RESULTS We found that binge drinking induced significant SYK activation (SYK(Y525/526) ) with no change in total SYK expression in the liver. Functional inhibition of SYK activation using a potent SYK inhibitor, R406, was associated with a significant decrease in alcohol-induced hepatic inflammation as demonstrated by decreased phospho-nuclear factor kappa beta (NF-κB) p65, NF-κB nuclear binding, tumor necrosis factor-alpha, and monocyte chemoattractant protein-1 mRNA in the liver. Compared to vehicle controls, SYK inhibitor treatment decreased alcohol binge-induced hepatocyte injury indicated by histology and serum alanine aminotransferase. Strikingly, SYK inhibitor treatment also resulted in a significant reduction in alcohol-induced liver steatosis. CONCLUSIONS Our novel observations demonstrate the role of SYK, activation in the pathomechanism of binge drinking-induced liver disease highlighting SYK a potential multifaceted therapeutic target.
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Affiliation(s)
- Terence N Bukong
- University of Massachusetts Medical School, Worcester, Massachusetts
| | | | - Benedek Gyongyosi
- University of Massachusetts Medical School, Worcester, Massachusetts
| | - Aditya Ambade
- University of Massachusetts Medical School, Worcester, Massachusetts
| | - Donna Catalano
- University of Massachusetts Medical School, Worcester, Massachusetts
| | - Karen Kodys
- University of Massachusetts Medical School, Worcester, Massachusetts
| | - Gyongyi Szabo
- University of Massachusetts Medical School, Worcester, Massachusetts
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Boye A, Zou YH, Yang Y. Metabolic derivatives of alcohol and the molecular culprits of fibro-hepatocarcinogenesis: Allies or enemies? World J Gastroenterol 2016; 22:50-71. [PMID: 26755860 PMCID: PMC4698508 DOI: 10.3748/wjg.v22.i1.50] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/28/2015] [Revised: 10/12/2015] [Accepted: 11/19/2015] [Indexed: 02/06/2023] Open
Abstract
Chronic intake of alcohol undoubtedly overwhelms the structural and functional capacity of the liver by initiating complex pathological events characterized by steatosis, steatohepatitis, hepatic fibrosis and cirrhosis. Subsequently, these initial pathological events are sustained and ushered into a more complex and progressive liver disease, increasing the risk of fibro-hepatocarcinogenesis. These coordinated pathological events mainly result from buildup of toxic metabolic derivatives of alcohol including but not limited to acetaldehyde (AA), malondialdehyde (MDA), CYP2E1-generated reactive oxygen species, alcohol-induced gut-derived lipopolysaccharide, AA/MDA protein and DNA adducts. The metabolic derivatives of alcohol together with other comorbidity factors, including hepatitis B and C viral infections, dysregulated iron metabolism, abuse of antibiotics, schistosomiasis, toxic drug metabolites, autoimmune disease and other non-specific factors, have been shown to underlie liver diseases. In view of the multiple etiology of liver diseases, attempts to delineate the mechanism by which each etiological factor causes liver disease has always proved cumbersome if not impossible. In the case of alcoholic liver disease (ALD), it is even more cumbersome and complicated as a result of the many toxic metabolic derivatives of alcohol with their varying liver-specific toxicities. In spite of all these hurdles, researchers and experts in hepatology have strived to expand knowledge and scientific discourse, particularly on ALD and its associated complications through the medium of scientific research, reviews and commentaries. Nonetheless, the molecular mechanisms underpinning ALD, particularly those underlying toxic effects of metabolic derivatives of alcohol on parenchymal and non-parenchymal hepatic cells leading to increased risk of alcohol-induced fibro-hepatocarcinogenesis, are still incompletely elucidated. In this review, we examined published scientific findings on how alcohol and its metabolic derivatives mount cellular attack on each hepatic cell and the underlying molecular mechanisms leading to disruption of core hepatic homeostatic functions which probably set the stage for the initiation and progression of ALD to fibro-hepatocarcinogenesis. We also brought to sharp focus, the complex and integrative role of transforming growth factor beta/small mothers against decapentaplegic/plasminogen activator inhibitor-1 and the mitogen activated protein kinase signaling nexus as well as their cross-signaling with toll-like receptor-mediated gut-dependent signaling pathways implicated in ALD and fibro-hepatocarcinogenesis. Looking into the future, it is hoped that these deliberations may stimulate new research directions on this topic and shape not only therapeutic approaches but also models for studying ALD and fibro-hepatocarcinogenesis.
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In Vivo Acute on Chronic Ethanol Effects in Liver: A Mouse Model Exhibiting Exacerbated Injury, Altered Metabolic and Epigenetic Responses. Biomolecules 2015; 5:3280-94. [PMID: 26610587 PMCID: PMC4693278 DOI: 10.3390/biom5043280] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2015] [Accepted: 11/17/2015] [Indexed: 01/06/2023] Open
Abstract
Chronic alcoholics who also binge drink (i.e., acute on chronic) are prone to an exacerbated liver injury but its mechanism is not understood. We therefore investigated the in vivo effects of chronic and binge ethanol ingestion and compared to chronic ethanol followed by three repeat binge ethanol on the liver of male C57/BL6 mice fed ethanol in liquid diet (4%) for four weeks followed by binge ethanol (intragastric administration, 3.5 g/kg body weight, three doses, 12h apart). Chronic followed by binge ethanol exacerbated fat accumulation, necrosis, decrease in hepatic SAM and SAM:SAH ratio, increase in adenosine levels, and elevated CYP2E1 levels. Histone H3 lysine acetylation (H3AcK9), dually modified phosphoacetylated histone H3 (H3AcK9/PS10), and phosphorylated H2AX increased after binge whereas phosphorylation of histone H3 ser 10 (H3S10) and H3 ser 28 (H3S28) increased after chronic ethanol-binge. Histone H3 lysine 4 and 9 dimethylation increased with a marked dimethylation in H3K9 in chronic ethanol binge group. Trimethylated histone H3 levels did not change. Nuclear levels of histone acetyl transferase GCN5 and histone deacetylase HDAC3 were elevated whereas phospho-CREB decreased in a distinctive manner. Taken together, acute on chronic ethanol ingestion caused amplification of liver injury and elicited characteristic profiles of histone modifications, metabolic alterations, and changes in nuclear protein levels. These findings demonstrate that chronic ethanol exposure renders liver more susceptible to repeat acute/binge ethanol induced acceleration of alcoholic liver disease.
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Relja B, Weber R, Maraslioglu M, Wagner N, Borsello T, Jobin C, Marzi I, Lehnert M. Differential Relevance of NF-κB and JNK in the Pathophysiology of Hemorrhage/Resususcitation-Induced Liver Injury after Chronic Ethanol Feeding. PLoS One 2015; 10:e0137875. [PMID: 26367181 PMCID: PMC4569329 DOI: 10.1371/journal.pone.0137875] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2015] [Accepted: 08/22/2015] [Indexed: 12/18/2022] Open
Abstract
BACKGROUND Chronic ethanol (EtOH) abuse worsens pathophysiological derangements after hemorrhagic shock and resuscitation (H/R) that induce hepatic injury and strong inflammatory changes via JNK and NF-κB activation. Inhibiting JNK with a cell-penetrating, protease-resistant peptide D-JNKI-1 after H/R in mice with healthy livers ameliorated these effects. Here, we studied if JNK inhibition by D-JNKI-1 in chronically EtOH-fed mice after hemorrhagic shock prior to the onset of resuscitation also confers protection. METHODS Male mice were fed a Lieber-DeCarli diet containing EtOH or an isocaloric control (ctrl) diet for 4 weeks. Animals were hemorrhaged for 90 min (32 ± 2 mm Hg) and randomly received either D-JNKI-1 (11 mg/kg, intraperitoneally, i. p.) or sterile saline as vehicle (veh) immediately before the onset of resuscitation. Sham animals underwent surgical procedures without H/R and were either D-JNKI-1 or veh treated. Two hours after resuscitation, blood samples and liver tissue were harvested. RESULTS H/R induced hepatic injury with increased systemic interleukin (IL)-6 levels, and enhanced local gene expression of NF-κB-controlled genes such as intercellular adhesion molecule (ICAM)-1 and matrix metallopeptidase (MMP)9. c-Jun and NF-κB phosphorylation were increased after H/R. These effects were further increased in EtOH-fed mice after H/R. D-JNKI-1 application inhibited the proinflammatory changes and reduced significantly hepatic injury after H/R in ctrl-fed mice. Moreover, D-JNKI-1 reduces in ctrl-fed mice the H/R-induced c-Jun and NF-κB phosphorylation. However, in chronically EtOH-fed mice, JNK inhibition did not prevent the H/R-induced hepatic damage and proinflammatory changes nor c-Jun and NF-κB phosphorylation after H/R. CONCLUSIONS These results indicate, that JNK inhibition is protective only in not pre-harmed liver after H/R. In contrast, the pronounced H/R-induced liver damage in mice being chronically fed with ethanol cannot be prevented by JNK inhibition after H/R and seems to be under the control of NF-κB.
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Affiliation(s)
- Borna Relja
- Department of Trauma, Hand and Reconstructive Surgery, University Hospital Frankfurt, Goethe University, Frankfurt, Germany
- * E-mail:
| | - Roxane Weber
- Department of Trauma, Hand and Reconstructive Surgery, University Hospital Frankfurt, Goethe University, Frankfurt, Germany
| | - Miriam Maraslioglu
- Department of Trauma, Hand and Reconstructive Surgery, University Hospital Frankfurt, Goethe University, Frankfurt, Germany
| | - Nils Wagner
- Department of Trauma, Hand and Reconstructive Surgery, University Hospital Frankfurt, Goethe University, Frankfurt, Germany
| | - Tiziana Borsello
- Neuronal Death and Neuroprotection Unit, Instituto Di Ricerche Farmacologiche "Mario Negri", Milano, Italy
| | - Christian Jobin
- Department of Medicine, Division of Gastroenterology, Hepatology, and Nutrition, University of Florida, Gainesville, Florida, United States of America
| | - Ingo Marzi
- Department of Trauma, Hand and Reconstructive Surgery, University Hospital Frankfurt, Goethe University, Frankfurt, Germany
| | - Mark Lehnert
- Department of Trauma, Hand and Reconstructive Surgery, University Hospital Frankfurt, Goethe University, Frankfurt, Germany
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Shukla SD, Restrepo R, Fish P, Lim RW, Ibdah JA. Different Mechanisms for Histone Acetylation by Ethanol and Its Metabolite Acetate in Rat Primary Hepatocytes. J Pharmacol Exp Ther 2015; 354:18-23. [DOI: 10.1124/jpet.115.223867] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/30/2023] Open
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29
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Rodrigues GB, Rocha SWS, Santos LAMD, de Oliveira WH, Gomes FODS, de França MEDR, Lós DB, Peixoto CA. Diethylcarbamazine: Possible therapeutic alternative in the treatment of alcoholic liver disease in C57BL/6 mice. Clin Exp Pharmacol Physiol 2015; 42:369-79. [DOI: 10.1111/1440-1681.12369] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2014] [Revised: 01/12/2015] [Accepted: 01/28/2015] [Indexed: 12/12/2022]
Affiliation(s)
| | | | | | | | | | | | - Deniele Bezerra Lós
- Postgraduate Program in Biotechnology (RENORBIO); Federal University of Pernambuco; Pernambuco Brazil
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Schattenberg JM, Czaja MJ. Regulation of the effects of CYP2E1-induced oxidative stress by JNK signaling. Redox Biol 2014; 3:7-15. [PMID: 25462060 PMCID: PMC4218941 DOI: 10.1016/j.redox.2014.09.004] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2014] [Revised: 09/18/2014] [Accepted: 09/19/2014] [Indexed: 02/07/2023] Open
Abstract
The generation of excessive amounts of reactive oxygen species (ROS) leads to cellular oxidative stress that underlies a variety of forms of hepatocyte injury and death including that from alcohol. Although ROS can induce cell damage through direct effects on cellular macromolecules, the injurious effects of ROS are mediated largely through changes in signal transduction pathways such as the mitogen-activated protein kinase c-Jun N-terminal kinase (JNK). In response to alcohol, hepatocytes have increased levels of the enzyme cytochrome P450 2E1 (CYP2E1) which generates an oxidant stress that promotes the development of alcoholic steatosis and liver injury. These effects are mediated in large part through overactivation of JNK that alters cell death pathways. Targeting the JNK pathway or its downstream effectors may be a useful therapeutic approach to the oxidative stress generated by CYP2E1 in alcoholic liver disease.
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Affiliation(s)
- Jörn M Schattenberg
- I. Department of Medicine, University Medical Center of the Johannes Gutenberg University, 55131 Mainz, Germany
| | - Mark J Czaja
- Department of Medicine and Marion Bessin Liver Research Center, Albert Einstein College of Medicine, 1300 Morris Park Avenue, Bronx, NY 10461, USA.
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31
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Aroor AR, Restrepo RJ, Kharbanda KK, Shukla SD. Epigenetic histone modifications in a clinically relevant rat model of chronic ethanol-binge-mediated liver injury. Hepatol Int 2014. [PMID: 26201320 DOI: 10.1007/s12072-014-9546-4] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
PURPOSE Ethanol binge augments liver injury after chronic ethanol consumption in humans, but the mechanism behind the enhanced liver injury by ethanol binge is not known. In this study we used a clinically relevant rat model in which liver injury is amplified by binge after chronic ethanol treatment and investigated the importance of histone modifications. METHODS Eight-week-old Sprague-Dawley rats were fed ethanol in a liquid diet for 4 weeks. Control rats were fed an isocaloric liquid diet. This was followed by three binge administrations of ethanol (intragastric 5 g/kg body weight, 12 h apart). In the control, ethanol was replaced by water. Four hours after the last binge administration, liver samples were analyzed for histone modifications and parameters of liver injury. RESULTS Chronic ethanol administration alone caused an increase in histone H3 ser10 and ser28 (H3S10 or S28) phosphorylation, and binge ethanol reduced their levels. Levels of dually modified phosphoacetylated histone H3 (H3AcK9/PS10) increased after acute binge ethanol and remained same after chronic ethanol binge. In contrast, histone H3 lysine-9 acetylation (H3AcK9) was not increased after chronic ethanol but increased significantly after acute binge and chronic ethanol binge. Increase in histone acetylation was accompanied by increased phospho-ERK1/2 in the nuclear extracts. Increased acetylation after chronic ethanol binge was also accompanied by increased protein levels of GCN5 histone acetyl transferase and a modest increase in HDAC3 in the nucleus. Histone lysine-9 dimethylation was significantly increased after chronic ethanol binge. Chronic ethanol binge also resulted in a decrease in the SAM:SAH ratio with a relative decrease of SAM levels and a corresponding increase in SAH levels. CONCLUSIONS Ethanol binge after chronic ethanol altered the profile of site-specific histone modifications and may underlie the mechanism of augmented liver injury by chronic-ethanol-binge-treated rats.
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Affiliation(s)
- Annayya R Aroor
- Department of Medical Pharmacology and Physiology, University of Missouri School of Medicine, Columbia, MO, 65212, USA
| | - Ricardo J Restrepo
- Department of Medical Pharmacology and Physiology, University of Missouri School of Medicine, Columbia, MO, 65212, USA
| | - Kusum K Kharbanda
- Veterans Affairs Nebraska-Western Iowa Health Care System, Omaha, NE, 68105, USA
| | - Shivendra D Shukla
- Department of Medical Pharmacology and Physiology, University of Missouri School of Medicine, Columbia, MO, 65212, USA.
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Tian C, Jin X, Ye X, Wu H, Ren W, Zhang R, Long J, Ying C. Long term intake of 0.1% ethanol decreases serum adiponectin by suppressing PPARγ expression via p38 MAPK pathway. Food Chem Toxicol 2014; 65:329-34. [PMID: 24412557 DOI: 10.1016/j.fct.2014.01.007] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2013] [Revised: 12/13/2013] [Accepted: 01/01/2014] [Indexed: 02/06/2023]
Abstract
Light alcohol consumption was reported to be negatively associated with insulin resistance and risk of cardiovascular diseases; however, the results were inconsistent. We here investigate whether long term intake of low-concentration ethanol can affect adiponectin levels. Male Wistar rats were exposed to 0.1% ethanol in drinking water for 26weeks. Visceral adipose tissue (VAT) was cultured and treated with ethanol, SB203580, GW9662, or rosiglitazone. Adiponectin in serum and culture supernatant were measured by ELISA, mRNA levels of adiponectin and PPARγ were determined by RT-PCR, and protein expressions of PPARγ, p38 MAPK and phospho-p38 MAPK were determined by Western blot. In vivo, ethanol decreased the mRNA of adiponectin in VAT and serum adiponectin significantly. Decreased PPARγ and increased activation of p38 MAPK were observed in ethanol treated group. In vitro, SB203580 increased the adiponectin and PPARγ levels in normal DMEM cultured VAT and ameliorated ethanol-induced decrease of adiponectin and PPARγ expressions. GW9662 also decreased the adiponectin levels; Both ethanol and GW9662 weakened the rosiglitazone-induced elevation of adiponectin levels in cultured VAT. These data suggest that long term intake of 0.1% ethanol down-regulated adiponectin levels, and the regulation of PPARγ via p38 MAPK pathway plays an important role in the mechanism underneath.
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Affiliation(s)
- Chong Tian
- Department of Nutrition & Food Hygiene, School of Public Health, Tongji Medical College, Huazhong University of Science & Technology, Wuhan 430030, PR China; Department of Nursing, Tongji Medical College, Huazhong University of Science & Technology, Wuhan 430030, PR China
| | - Xin Jin
- Department of Nutrition & Food Hygiene, School of Public Health, Tongji Medical College, Huazhong University of Science & Technology, Wuhan 430030, PR China; Ministry of Education Key Lab of Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science & Technology, Wuhan, PR China
| | - Xiaolei Ye
- Department of Public Health, Wenzhou Medical University, Wenzhou, PR China
| | - Hongmei Wu
- Department of Public Health, Wenzhou Medical University, Wenzhou, PR China
| | - Weiye Ren
- Department of Nutrition & Food Hygiene, School of Public Health, Tongji Medical College, Huazhong University of Science & Technology, Wuhan 430030, PR China; Ministry of Education Key Lab of Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science & Technology, Wuhan, PR China
| | - Rui Zhang
- Department of Nutrition & Food Hygiene, School of Public Health, Tongji Medical College, Huazhong University of Science & Technology, Wuhan 430030, PR China; Ministry of Education Key Lab of Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science & Technology, Wuhan, PR China
| | - Jia Long
- Department of Nutrition & Food Hygiene, School of Public Health, Tongji Medical College, Huazhong University of Science & Technology, Wuhan 430030, PR China; Ministry of Education Key Lab of Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science & Technology, Wuhan, PR China
| | - Chenjiang Ying
- Department of Nutrition & Food Hygiene, School of Public Health, Tongji Medical College, Huazhong University of Science & Technology, Wuhan 430030, PR China; Ministry of Education Key Lab of Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science & Technology, Wuhan, PR China.
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Chang YY, Lin YL, Yang DJ, Liu CW, Hsu CL, Tzang BS, Chen YC. Hepatoprotection of noni juice against chronic alcohol consumption: lipid homeostasis, antioxidation, alcohol clearance, and anti-inflammation. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2013; 61:11016-11024. [PMID: 24152092 DOI: 10.1021/jf4038419] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Chronic alcohol consumption leads to steatohepatitis and cirrhosis. Naturally fermented noni juice (NJ) contains polyphenols, polysaccharides, and some trace minerals. This study explored protective effects of NJ against chronic alcohol consumption. Mice were assigned randomly to one of the following groups: (1) control, control liquid diet and distilled water; (2) alcohol, alcohol liquid diet and distilled water; (3) Alc+NJ_1X, alcohol liquid diet and 5 mL NJ/kg BW; (4) Alc+NJ_2X, alcohol liquid diet and 10 mL NJ/kg BW; (5) Alc+NJ_3X, alcohol and 15 mL NJ/kg BW for 4 weeks. NJ decreased (p < 0.05) serum AST, ALT, and alcohol levels and liver lipids, as well as increased (p < 0.05) daily fecal lipid outputs in alcohol-diet fed mice. NJ supplementation not only down-regulated (p < 0.05) lipogenesis but also up-regulated (p < 0.05) fatty acid β-oxidation in livers of alcohol-diet fed mice. NJ also accelerated alcohol clearance via increased (p < 0.05) hepatic ADH and ALDH activities. NJ increased (p < 0.05) hepatic TEAC and GSH levels but decreased (p < 0.05) TBARS value and TLR2/4, P38, ERK 1/2, NFκB P65, iNOS, COX-2, TNF-α, and IL-1β expressions in alcohol-diet fed mice. NJ promotes hepatoprotection against alcohol-induced injury due to regulations of lipid homeostasis, antioxidant status, alcohol metabolism, and anti-inflammatory responses.
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Affiliation(s)
- Yuan-Yen Chang
- Department of Microbiology and Immunology and Institute of Microbiology and Immunology, School of Medicine, Chung-Shan Medical University , Taichung 402, Taiwan
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Abstract
Chronic alcohol consumption is a leading cause of chronic liver disease worldwide, leading to cirrhosis and hepatocellular carcinoma. Currently, the most widely used model for alcoholic liver injury is ad libitum feeding with the Lieber-DeCarli liquid diet containing ethanol for 4-6 weeks; however, this model, without the addition of a secondary insult, only induces mild steatosis, slight elevation of serum alanine transaminase (ALT) and little or no inflammation. Here we describe a simple mouse model of alcoholic liver injury by chronic ethanol feeding (10-d ad libitum oral feeding with the Lieber-DeCarli ethanol liquid diet) plus a single binge ethanol feeding. This protocol for chronic-plus-single-binge ethanol feeding synergistically induces liver injury, inflammation and fatty liver, which mimics acute-on-chronic alcoholic liver injury in patients. This feeding protocol can also be extended to chronic feeding for longer periods of time up to 8 weeks plus single or multiple binges. Chronic-binge ethanol feeding leads to high blood alcohol levels; thus, this simple model will be very useful for the study of alcoholic liver disease (ALD) and of other organs damaged by alcohol consumption.
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Shukla SD, Pruett SB, Szabo G, Arteel GE. Binge ethanol and liver: new molecular developments. Alcohol Clin Exp Res 2013; 37:550-7. [PMID: 23347137 DOI: 10.1111/acer.12011] [Citation(s) in RCA: 63] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2012] [Accepted: 08/10/2012] [Indexed: 02/06/2023]
Abstract
Binge consumption of alcohol is an alarming global health problem. Binge (acute) ethanol (EtOH) is implicated in the pathophysiology of alcoholic liver disease (ALD). New studies from experimental animals and from humans indicate that binge EtOH has profound effects on immunological, signaling, and epigenetic parameters of the liver. This is in addition to the known metabolic effects of acute EtOH. Binge EtOH alters the levels of several cellular components and dramatically amplifies liver injury in chronically EtOH exposed liver. These studies highlight the importance of molecular investigations into binge effects of EtOH for a better understanding of ALD and also to develop therapeutic strategies to control it. This review summarizes these recent developments.
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Affiliation(s)
- Shivendra D Shukla
- Department of Medical Pharmacology and Physiology, University of Missouri School of Medicine, Columbia, MO 65202, USA.
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Brandon-Warner E, Schrum LW, Schmidt CM, McKillop IH. Rodent models of alcoholic liver disease: of mice and men. Alcohol 2012; 46:715-25. [PMID: 22960051 DOI: 10.1016/j.alcohol.2012.08.004] [Citation(s) in RCA: 95] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2012] [Revised: 07/18/2012] [Accepted: 08/14/2012] [Indexed: 02/07/2023]
Abstract
Alcoholic liver disease (ALD) is a major cause of acute and chronic liver disease worldwide. The progressive nature of ALD is well described; however, the complex interactions under which these pathologies evolve remain to be fully elucidated. Clinically there are no clear biomarkers or universally accepted, effective treatment strategies for ALD. Experimental models of ALD are an important component in identifying underlying mechanisms of alcohol-induced injury to develop better diagnostic markers, predictors of disease progression, and therapeutic targets to manage, halt, or reverse disease progression. Rodents remain the most accessible model for studying ALD pathology. Effective rodent models must mimic the natural history of ALD while allowing examination of complex interactions between multiple hepatic, and non-hepatic, cell types in the setting of altered metabolic or oxidative/nitrosative stress, inflammatory responses, and sensitivity to cytotoxic stress. Additionally, mode and duration of alcohol delivery influence hepatic response and present unique challenges in understanding disease pathology. This review provides an overview of rodent models of ALD, their strengths and weaknesses relative to human disease states, and provides insight of the potential to develop novel rodent models to simulate the course of human ALD.
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Aroor AR, Roy LJ, Restrepo RJ, Mooney BP, Shukla SD. A proteomic analysis of liver after ethanol binge in chronically ethanol treated rats. Proteome Sci 2012; 10:29. [PMID: 22545783 PMCID: PMC3504578 DOI: 10.1186/1477-5956-10-29] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2011] [Accepted: 04/30/2012] [Indexed: 12/16/2022] Open
Abstract
Background Binge ethanol in rats after chronic ethanol exposure augments necrosis and steatosis in the liver. In this study, two-dimensional gel electrophoresis proteomic profiles of liver of control, chronic ethanol, control-binge, and chronic ethanol- binge were compared. Results The proteomic analysis identified changes in protein abundance among the groups. The levels of carbonic anhydrase 3 (CA3) were decreased after chronic ethanol and decreased further after chronic ethanol-binge. Ethanol binge alone in control rats had no effect on this protein suggesting its possible role in increased susceptibility to injury by binge after chonic ethanol treatment. A protein spot, in which both cytosolic isocitrate dehydrogenase (IDH1) and glutamine synthetase (GS) were identified, showed a small decrease after chronic ethanol binge but western blot demonstrated significant decrease only for glutamine synthetase in chronic ethanol treated rats. The level of gluathione S-transferase mu isoform (GSTM1) increased after chronic ethanol but was lower after chronic ethanol-binge compared to chronic ethanol treatment. The protein levels of the basic form of protein disulfide isomerase associated protein 3 (PDIA3) were significantly decreased and the acidic forms were increased after chronic ethanol- binge but not in chronic ethanol treated rats or ethanol binge in control rats. The significant changes in proteome profile in chronic ethanol binge were accompanied by a marked increase in liver injury as evidenced by enhanced steatosis, necrosis, increased 4-hydroxynonenal labeled proteins, CYP2E1 expression, and decreased histone H2AX phosphorylation. Conclusions Given the role of CA3, IDH1 and GST in oxidative stress; PDIA3 in protein quality control, apoptosis and DNA repair and decreased glutamine synthetase as a sensitive marker of pericentral liver injury this proteome study of chronic ethanol-binge rat model identifies these proteins for the first time as molecular targets with potential role in progression of liver injury by binge ethanol drinking.
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Affiliation(s)
- Annayya R Aroor
- Department of Medical Pharmacology & Physiology, University of Missouri, Columbia, MO 65212, USA.
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Lee YJ, Eun JR. Cilostazol Decreases Ethanol-Mediated TNFalpha Expression in RAW264.7 Murine Macrophage and in Liver from Binge Drinking Mice. THE KOREAN JOURNAL OF PHYSIOLOGY & PHARMACOLOGY : OFFICIAL JOURNAL OF THE KOREAN PHYSIOLOGICAL SOCIETY AND THE KOREAN SOCIETY OF PHARMACOLOGY 2012; 16:131-8. [PMID: 22563259 PMCID: PMC3339289 DOI: 10.4196/kjpp.2012.16.2.131] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/28/2012] [Revised: 03/15/2012] [Accepted: 04/03/2012] [Indexed: 01/18/2023]
Abstract
Alcoholic hepatitis is a leading cause of liver failure in which the increased production of tumor necrosis factor α (TNFα) plays a critical role in progression of alcoholic liver disease. In the present study, we investigated the effects of cilostazol, a selective inhibitor of type III phosphodiesterase on ethanol-mediated TNFα production in vitro and in vivo, and the effect of cilostazol was compared with that of pentoxifylline, which is currently used in clinical trial. RAW264.7 murine macrophages were pretreated with ethanol in the presence or absence of cilostazol then, stimulated with lipopolysacchride (LPS). Cilostazol significantly suppressed the level of LPS-stimulated TNFα mRNA and protein with a similar degree to that by pentoxifylline. Cilostazol increased the basal AMP-activated protein kinase (AMPK) activity as well as normalized the decreased AMPK by LPS. AICAR, an AMPK activator and db-cAMP also significantly decreased TNFα production in RAW264.7 cells, but cilostazol did not affect the levels of intracellular cAMP and reactive oxygen species (ROS) production. The in vivo effect of cilostazol was examined using ethanol binge drinking (6 g/kg) mice model. TNFα mRNA and protein decreased in liver from ethanol gavaged mice compared to that from control mice. Pretreatment of mice with cilostazol or pentoxifylline further reduced the TNFα production in liver. These results demonstrated that cilostazol effectively decrease the ethanol-mediated TNFα production both in murine macrophage and in liver from binge drinking mice and AMPK may be responsible for the inhibition of TNFα production by cilostazol.
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Affiliation(s)
- Youn Ju Lee
- Department of Pharmacology, School of Medicine, Catholic University of Daegu, Daegu 705-718, Korea
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Aroor AR, Jackson DE, Shukla SD. Dysregulated phosphorylation and nuclear translocation of cyclic AMP response element binding protein (CREB) in rat liver after chronic ethanol binge. Eur J Pharmacol 2012; 679:101-8. [PMID: 22269225 DOI: 10.1016/j.ejphar.2011.12.045] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2011] [Revised: 12/21/2011] [Accepted: 12/28/2011] [Indexed: 01/26/2023]
Abstract
Binge ethanol during chronic ethanol abuse augments liver injury but the underlying mechanism remains unknown. CREB (cyclic AMP response element binding protein) is implicated as a key transcription factor in liver regeneration and hepatic glucose and lipid metabolism. We examined the effects of ethanol on the phosphorylation of CREB in hepatocytes, and in vivo in rat liver after chronic ethanol binge. For in vivo studies, rats were fed ethanol in liquid diet for 4 weeks followed by single binge administration of ethanol (intragastric, 5 g/kg body weight). Four hours after binge administration, liver samples were collected and analyzed. Treatment of hepatocytes with ethanol caused increased phosphorylation of p38 MAPK (mitogen activated protein kinase), MSK-1 (mitogen and stress activated kinase) and CREB in the nuclear compartment without activation of ERK1/2 (extracellular regulated kinase); whereas angiotensin II induced activation of CREB was accompanied by activation of ERK1/2. In chronic ethanol-binge studies, analysis of the whole cell extracts showed increased phosphorylation of CREB, with no effect on CREB protein levels; increased phospho-ERK1/2, and decreased phospho-p38 MAPK. In contrast, the nuclear levels of phospho-CREB and CREB protein were reduced. Reduction in phospho-CREB and CREB proteins in the nuclear extracts was accompanied by suppression of mRNA levels for CPT-1 (carnitine palmitoyl transferase-1) and increase in hepatic steatosis after binge. It is concluded that binge ethanol causes defect in the nuclear accumulation of CREB protein, phospho-CREB, and an exaggerated hepatic steatosis. These in vivo effects are distinct from the effects of ethanol on hepatocytes in vitro.
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Affiliation(s)
- Annayya R Aroor
- Department of Medical Pharmacology and Physiology, University of Missouri School of Medicine, Columbia, MO 65212, United States
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Aroor AR, Shukla SD. Binge ethanol intake in chronically exposed rat liver decreases LDL-receptor and increases angiotensinogen gene expression. World J Hepatol 2011; 3:250-5. [PMID: 21969878 PMCID: PMC3182283 DOI: 10.4254/wjh.v3.i9.250] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/03/2011] [Revised: 07/06/2011] [Accepted: 08/10/2011] [Indexed: 02/06/2023] Open
Abstract
AIM To investigated the status of low-density lipoprotein (LDL)-receptor and angiotensionogen gene expression in rats treated chronically with ethanol followed by binge administration, a model that mimics the human scenario. METHODS Rats were chronically treated with ethanol in liquid diet for 4 wk followed by a single binge mode of ethanol administration (5 mg/kg body weight). Samples were processed 4 h after binge ethanol administration (chronic ethanol binge). Control rats were fed isocaloric diet. In the control for binge, ethanol was replaced by water. Expression of mRNA for angiotensinogen, c-fos and LDL-receptor, and nuclear accumulation of phospho-extracellular regulated kinases (ERK)1/2 and ERK1/2 protein were examined. RESULTS Binge ethanol administration in chronically treated rats caused increase in steatosis and necrosis. Chronic ethanol alone had negligible effect on mRNA levels of LDL-receptor, or on the levels of nuclear ERK1/2 and phospho-ERK1/2. But, chronic ethanol followed by binge caused a decrease in LDL-receptor mRNA, and also decreased the levels of ERK1/2 and phospho-ERK1/2 in the nuclear compartment. On the other hand, chronic ethanol-binge increased mRNA expression of angiotensinogen and c-fos. CONCLUSION Binge ethanol after chronic exposure, causes transcriptional dysregulation of LDL-receptor and angiotensinogen genes, both cardiovascular risk factors.
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Affiliation(s)
- Annayya R Aroor
- Annayya R Aroor, Shivendra D Shukla, Department of Medical Pharmacology and Physiology, University of Missouri School of Medicine, Columbia, MO 65212, United States
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