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Kim KH, Lee JM, Zhou Y, Harpavat S, Moore DD. Glucocorticoids Have Opposing Effects on Liver Fibrosis in Hepatic Stellate and Immune Cells. Mol Endocrinol 2016; 30:905-16. [PMID: 27355192 DOI: 10.1210/me.2016-1029] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Liver fibrosis is a reversible wound-healing process that is protective in the short term, but prolonged fibrotic responses lead to excessive accumulation of extracellular matrix components that suppresses hepatocyte regeneration, resulting in permanent liver damage. Upon liver damage, nonparenchymal cells including immune cells and hepatic stellate cells (HSCs) have crucial roles in the progression and regression of liver fibrosis. Here, we report differential roles of the glucocorticoid receptor (GR), acting in immune cells and HSCs, in liver fibrosis. In the carbon tetrachloride hepatotoxin-induced fibrosis model, both steroidal and nonsteroidal GR ligands suppressed expression of fibrotic genes and decreased extracellular matrix deposition but also inhibited immune cell infiltration and exacerbated liver injury. These counteracting effects of GR ligands were dissociated in mice with conditional GR knockout in immune cells (GR(LysM)) or HSC (GR(hGFAP)): the impacts of dexamethasone on immune cell infiltration and liver injury were totally blunted in GR(LysM) mice, whereas the suppression of fibrotic gene expression was diminished in GR(hGFAP) mice. The effect of GR activation in HSC was further confirmed in the LX-2 HSC cell line, in which antifibrotic effects were mediated by GR ligand inhibition of Sma and mad-related protein 3 (SMAD3) expression. We conclude that GR has differential roles in immune cells and HSCs to modulate liver injury and liver fibrosis. Specific activation of HSC-GR without alteration of GR activity in immune cells provides a potential therapeutic approach to treatment of hepatic fibrosis.
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Affiliation(s)
- Kang Ho Kim
- Department of Molecular and Cellular Biology (K.H.K., J.M.L., Y.Z., D.D.M.), Baylor College of Medicine, Houston, Texas 77030; Department of Biochemistry and Cell Biology (J.M.L.), School of Medicine, Kyungpook National University, Daegu, Republic of Korea 41944; Integrative Molecular and Biomedical Sciences Graduate Program (Y.Z., D.D.M.), Baylor College of Medicine, Houston, Texas 77030; and Department of Pediatrics (S.H.), Baylor College of Medicine and Texas Children's Hospital, Houston, Texas 77030
| | - Jae Man Lee
- Department of Molecular and Cellular Biology (K.H.K., J.M.L., Y.Z., D.D.M.), Baylor College of Medicine, Houston, Texas 77030; Department of Biochemistry and Cell Biology (J.M.L.), School of Medicine, Kyungpook National University, Daegu, Republic of Korea 41944; Integrative Molecular and Biomedical Sciences Graduate Program (Y.Z., D.D.M.), Baylor College of Medicine, Houston, Texas 77030; and Department of Pediatrics (S.H.), Baylor College of Medicine and Texas Children's Hospital, Houston, Texas 77030
| | - Ying Zhou
- Department of Molecular and Cellular Biology (K.H.K., J.M.L., Y.Z., D.D.M.), Baylor College of Medicine, Houston, Texas 77030; Department of Biochemistry and Cell Biology (J.M.L.), School of Medicine, Kyungpook National University, Daegu, Republic of Korea 41944; Integrative Molecular and Biomedical Sciences Graduate Program (Y.Z., D.D.M.), Baylor College of Medicine, Houston, Texas 77030; and Department of Pediatrics (S.H.), Baylor College of Medicine and Texas Children's Hospital, Houston, Texas 77030
| | - Sanjiv Harpavat
- Department of Molecular and Cellular Biology (K.H.K., J.M.L., Y.Z., D.D.M.), Baylor College of Medicine, Houston, Texas 77030; Department of Biochemistry and Cell Biology (J.M.L.), School of Medicine, Kyungpook National University, Daegu, Republic of Korea 41944; Integrative Molecular and Biomedical Sciences Graduate Program (Y.Z., D.D.M.), Baylor College of Medicine, Houston, Texas 77030; and Department of Pediatrics (S.H.), Baylor College of Medicine and Texas Children's Hospital, Houston, Texas 77030
| | - David D Moore
- Department of Molecular and Cellular Biology (K.H.K., J.M.L., Y.Z., D.D.M.), Baylor College of Medicine, Houston, Texas 77030; Department of Biochemistry and Cell Biology (J.M.L.), School of Medicine, Kyungpook National University, Daegu, Republic of Korea 41944; Integrative Molecular and Biomedical Sciences Graduate Program (Y.Z., D.D.M.), Baylor College of Medicine, Houston, Texas 77030; and Department of Pediatrics (S.H.), Baylor College of Medicine and Texas Children's Hospital, Houston, Texas 77030
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Gao B, Tsukamoto H. Inflammation in Alcoholic and Nonalcoholic Fatty Liver Disease: Friend or Foe? Gastroenterology 2016; 150:1704-9. [PMID: 26826669 PMCID: PMC4887345 DOI: 10.1053/j.gastro.2016.01.025] [Citation(s) in RCA: 222] [Impact Index Per Article: 27.8] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/14/2015] [Revised: 01/12/2016] [Accepted: 01/20/2016] [Indexed: 02/06/2023]
Affiliation(s)
- Bin Gao
- Laboratory of Liver Diseases, National Institute on Alcohol Abuse and Alcoholism, National Institutes of Health, Bethesda, Maryland.
| | - Hidekazu Tsukamoto
- Southern California Research Center for Alcoholic Liver and Pancreatic Diseases and Cirrhosis, Department of Pathology, The Keck School of Medicine of The University of Southern California, Los Angeles, California; Department of Veterans Affairs Greater Los Angeles Healthcare System, Los Angeles, California.
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53
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Robinson MW, Harmon C, O'Farrelly C. Liver immunology and its role in inflammation and homeostasis. Cell Mol Immunol 2016; 13:267-76. [PMID: 27063467 PMCID: PMC4856809 DOI: 10.1038/cmi.2016.3] [Citation(s) in RCA: 646] [Impact Index Per Article: 80.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2015] [Revised: 01/08/2016] [Accepted: 01/09/2016] [Indexed: 12/12/2022] Open
Abstract
The human liver is usually perceived as a non-immunological organ engaged primarily in metabolic, nutrient storage and detoxification activities. However, we now know that the healthy liver is also a site of complex immunological activity mediated by a diverse immune cell repertoire as well as non-hematopoietic cell populations. In the non-diseased liver, metabolic and tissue remodeling functions require elements of inflammation. This inflammation, in combination with regular exposure to dietary and microbial products, creates the potential for excessive immune activation. In this complex microenvironment, the hepatic immune system tolerates harmless molecules while at the same time remaining alert to possible infectious agents, malignant cells or tissue damage. Upon appropriate immune activation to challenge by pathogens or tissue damage, mechanisms to resolve inflammation are essential to maintain liver homeostasis. Failure to clear 'dangerous' stimuli or regulate appropriately activated immune mechanisms leads to pathological inflammation and disrupted tissue homeostasis characterized by the progressive development of fibrosis, cirrhosis and eventual liver failure. Hepatic inflammatory mechanisms therefore have a spectrum of roles in the healthy adult liver; they are essential to maintain tissue and organ homeostasis and, when dysregulated, are key drivers of the liver pathology associated with chronic infection, autoimmunity and malignancy. In this review, we explore the changing perception of inflammation and inflammatory mediators in normal liver homeostasis and propose targeting of liver-specific immune regulation pathways as a therapeutic approach to treat liver disease.
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Affiliation(s)
- Mark W Robinson
- School of Biochemistry and Immunology, Trinity Biomedical Sciences Institute, Trinity College Dublin, Dublin D2, Ireland
| | - Cathal Harmon
- School of Biochemistry and Immunology, Trinity Biomedical Sciences Institute, Trinity College Dublin, Dublin D2, Ireland
| | - Cliona O'Farrelly
- School of Biochemistry and Immunology, Trinity Biomedical Sciences Institute, Trinity College Dublin, Dublin D2, Ireland
- School of Medicine, Trinity Biomedical Sciences Institute, Trinity College Dublin, Dublin D2, Ireland
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54
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Ju C, Tacke F. Hepatic macrophages in homeostasis and liver diseases: from pathogenesis to novel therapeutic strategies. Cell Mol Immunol 2016; 13:316-27. [PMID: 26908374 PMCID: PMC4856798 DOI: 10.1038/cmi.2015.104] [Citation(s) in RCA: 365] [Impact Index Per Article: 45.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2015] [Revised: 11/21/2015] [Accepted: 11/21/2015] [Indexed: 12/20/2022] Open
Abstract
Macrophages represent a major cell type of innate immunity and have emerged as a critical player and therapeutic target in many chronic inflammatory diseases. Hepatic macrophages consist of Kupffer cells, which are originated from the fetal yolk-sack, and infiltrated bone marrow-derived monocytes/macrophages. Hepatic macrophages play a central role in maintaining homeostasis of the liver and in the pathogenesis of liver injury, making them an attractive therapeutic target for liver diseases. However, the various populations of hepatic macrophages display different phenotypes and exert distinct functions. Thus, more research is required to better understand these cells to guide the development of macrophage-based therapeutic interventions. This review article will summarize the current knowledge on the origins and composition of hepatic macrophages, their functions in maintaining hepatic homeostasis, and their involvement in both promoting and resolving liver inflammation, injury, and fibrosis. Finally, the current strategies being developed to target hepatic macrophages for the treatment of liver diseases will be reviewed.
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Affiliation(s)
- Cynthia Ju
- Skaggs School of Pharmacy and Pharmaceutical Sciences and Integrated Immunology, University of Colorado Anschutz Medical Campus, Aurora, USA
| | - Frank Tacke
- Department of Medicine III, University Hospital Aachen, Aachen, Germany
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Lanthier N, Spahr L. [SPINK1, hepatic macrophages and progenitor cells: new tools for liver regeneration in alcoholic hepatitis?]. Med Sci (Paris) 2016; 32:149-52. [PMID: 26936169 DOI: 10.1051/medsci/20163202005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Affiliation(s)
- Nicolas Lanthier
- Gastroenterology and hepatology, university hospitals of Geneva, Geneva, Suisse - Service d'hépato-gastroentérologie, cliniques universitaires Saint-Luc, université catholique de Louvain, Brussels, Belgique - Laboratory of hepatogastroenterology, institut de recherche expérimentale et clinique, université catholique de Louvain, Brussels, Belgique
| | - Laurent Spahr
- Gastroenterology and hepatology, university hospitals of Geneva, Geneva, Suisse
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Eckert C, Kim YO, Julich H, Heier EC, Klein N, Krause E, Tschernig T, Kornek M, Lammert F, Schuppan D, Lukacs-Kornek V. Podoplanin discriminates distinct stromal cell populations and a novel progenitor subset in the liver. Am J Physiol Gastrointest Liver Physiol 2016; 310:G1-12. [PMID: 26564718 PMCID: PMC4698439 DOI: 10.1152/ajpgi.00344.2015] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/30/2015] [Accepted: 11/05/2015] [Indexed: 01/31/2023]
Abstract
Podoplanin/gp38(+) stromal cells present in lymphoid organs play a central role in the formation and reorganization of the extracellular matrix and in the functional regulation of immune responses. Gp38(+) cells are present during embryogenesis and in human livers of primary biliary cirrhosis. Since little is known about their function, we studied gp38(+) cells during chronic liver inflammation in models of biliary and parenchymal liver fibrosis and steatohepatitis. Gp38(+) cells were analyzed using flow cytometry and confocal microscopy, and the expression of their steady state and inflammation-associated genes was evaluated from healthy and inflamed livers. Gp38(+) cells significantly expanded in all three models of liver injury and returned to baseline levels during regression of inflammation. Based on CD133 and gp38 expression in the CD45(-)CD31(-)Asgpr1(-) liver cell fraction, numerous subsets could be identified that were negative for CD133 (gp38(hi)CD133(-), gp38(low)CD133(-), and gp38(-)CD133(-)). Moreover, among the CD133(+) cells, previously identified as progenitor population in injured liver, two subpopulations could be distinguished based on their gp38 expression (gp38(-)CD133(+) and CD133(+)gp38(+)). Importantly, the distribution of the identified subsets in inflammation illustrated injury-specific changes. Moreover, the gp38(+)CD133(+) cells exhibited liver progenitor cell characteristics similar to the gp38(-)CD133(+) population, thus representing a novel subset within the classical progenitor cell niche. Additionally, these cells expressed distinct sets of inflammatory genes during liver injury. Our study illuminates a novel classification of the stromal/progenitor cell compartment in the liver and pinpoints a hitherto unrecognized injury-related alteration in progenitor subset composition in chronic liver inflammation and fibrosis.
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MESH Headings
- AC133 Antigen
- ATP Binding Cassette Transporter, Subfamily B/deficiency
- ATP Binding Cassette Transporter, Subfamily B/genetics
- Animals
- Antigens, CD/metabolism
- Biomarkers/metabolism
- Cell Separation/methods
- Cells, Cultured
- Chemical and Drug Induced Liver Injury/genetics
- Chemical and Drug Induced Liver Injury/metabolism
- Chemical and Drug Induced Liver Injury/pathology
- Flow Cytometry
- Gene Expression Regulation
- Glycoproteins/metabolism
- Inflammation Mediators/metabolism
- Liver/metabolism
- Liver/pathology
- Liver Cirrhosis, Biliary/genetics
- Liver Cirrhosis, Biliary/metabolism
- Liver Cirrhosis, Biliary/pathology
- Liver Cirrhosis, Experimental/genetics
- Liver Cirrhosis, Experimental/metabolism
- Liver Cirrhosis, Experimental/pathology
- Male
- Membrane Glycoproteins/metabolism
- Mice, Inbred C57BL
- Mice, Knockout
- Microscopy, Confocal
- Non-alcoholic Fatty Liver Disease/genetics
- Non-alcoholic Fatty Liver Disease/metabolism
- Non-alcoholic Fatty Liver Disease/pathology
- Peptides/metabolism
- Phenotype
- Stem Cells/metabolism
- Stem Cells/pathology
- Stromal Cells/metabolism
- Stromal Cells/pathology
- ATP-Binding Cassette Sub-Family B Member 4
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Affiliation(s)
- Christoph Eckert
- Department of Medicine II, Saarland University Medical Center, Homburg, Germany
| | - Yong Ook Kim
- Institute of Translational Immunology and Research Center for Immunotherapy, University Medical Center, Johannes Gutenberg University, Mainz, Germany
| | - Henrike Julich
- Department of Medicine II, Saarland University Medical Center, Homburg, Germany
| | - Eva-Carina Heier
- Department of Medicine II, Saarland University Medical Center, Homburg, Germany
| | - Niklas Klein
- Department of Medicine II, Saarland University Medical Center, Homburg, Germany
| | - Elmar Krause
- Department of Physiology, Center for Integrative Physiology and Molecular Medicine, University of Saarland, Saarland, Germany
| | - Thomas Tschernig
- Insitute of Anatomy and Cell Biology, University of Saarland, Saarland, Germany; and
| | - Miroslaw Kornek
- Department of Medicine II, Saarland University Medical Center, Homburg, Germany
| | - Frank Lammert
- Department of Medicine II, Saarland University Medical Center, Homburg, Germany
| | - Detlef Schuppan
- Institute of Translational Immunology and Research Center for Immunotherapy, University Medical Center, Johannes Gutenberg University, Mainz, Germany
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