1. Kupffer cells hasten resolution of liver immunopathology in mouse models of viral hepatitis
- Author
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Nico van Rooijen, Roberto Aiolfi, Francis V. Chisari, Matteo Iannacone, Cristina Scozzesi, Masanori Isogawa, Giovanni Sitia, Luca G. Guidotti, Marco Bianchi, Ulrich H. von Andrian, Molecular cell biology and Immunology, CCA - Immuno-pathogenesis, Sitia, G, Iannacone, M, Aiolfi, R, Isogawa, M, van Rooijen, N, Scozzesi, C, Bianchi, MARCO EMILIO, von Andrian, Uh, Chisari, Fv, and Guidotti, Luca
- Subjects
Male ,Time Factors ,Neutrophils ,Gastroenterology and hepatology ,Anti-Inflammatory Agents ,Apoptosis ,Gadolinium ,CD8-Positive T-Lymphocytes ,Adaptive Immunity ,medicine.disease_cause ,Hepatitis ,Mice ,0302 clinical medicine ,Immunopathology ,Cytotoxic T cell ,lcsh:QH301-705.5 ,Immune Response ,Liver injury ,Receptors, Scavenger ,0303 health sciences ,Bone Density Conservation Agents ,T Cells ,Hepatitis B ,3. Good health ,Infectious hepatitis ,Liver ,030220 oncology & carcinogenesis ,Medicine ,Infectious diseases ,Viral hepatitis ,Research Article ,lcsh:Immunologic diseases. Allergy ,Hepatitis B virus ,Kupffer Cells ,Immune Cells ,Immunology ,Mice, Transgenic ,Viral diseases ,Biology ,Microbiology ,03 medical and health sciences ,HMGB Proteins ,Virology ,Genetics ,medicine ,Animals ,RNA, Messenger ,Scavenger receptor ,Molecular Biology ,Immunity to Infections ,Liver diseases ,030304 developmental biology ,Immunity ,medicine.disease ,eye diseases ,Mice, Inbred C57BL ,Disease Models, Animal ,lcsh:Biology (General) ,Liposomes ,Hepatocytes ,Parasitology ,Clodronic Acid ,lcsh:RC581-607 - Abstract
Kupffer cells (KCs) are widely considered important contributors to liver injury during viral hepatitis due to their pro-inflammatory activity. Herein we utilized hepatitis B virus (HBV)-replication competent transgenic mice and wild-type mice infected with a hepatotropic adenovirus to demonstrate that KCs do not directly induce hepatocellular injury nor do they affect the pathogenic potential of virus-specific CD8 T cells. Instead, KCs limit the severity of liver immunopathology. Mechanistically, our results are most compatible with the hypothesis that KCs contain liver immunopathology by removing apoptotic hepatocytes in a manner largely dependent on scavenger receptors. Apoptotic hepatocytes not readily removed by KCs become secondarily necrotic and release high-mobility group box 1 (HMGB-1) protein, promoting organ infiltration by inflammatory cells, particularly neutrophils. Overall, these results indicate that KCs resolve rather than worsen liver immunopathology., Author Summary Kupffer cells (KCs), the resident macrophages of the liver, are considered important contributors to liver injury during viral hepatitis due to their pro-inflammatory activity. Herein we utilized two different mouse models of viral hepatitis (where liver damage is triggered, as during viral hepatitis in humans, by virus-specific CD8 T cells) to show that KCs do not directly induce liver injury nor do they affect the pathogenic potential of virus-specific CD8 T cells. Instead, KCs limit the severity of liver immunopathology. Mechanistically, our results are most compatible with the hypothesis that KCs contain liver immunopathology by removing dying hepatocytes. Dying hepatocytes not readily removed by KCs release high-mobility group box 1 (HMGB-1) protein, promoting organ infiltration by inflammatory cells, particularly neutrophils. These results indicate that KCs resolve rather than worsen liver disease.
- Published
- 2010
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