Abstract
Among seven human hepatitis viruses (A to E, G and TT virus), hepatitis B (HBV) and C (HCV) viruses are able to persist in the host for years and principally contribute to the establishment of chronic hepatitis. During the course of persistent infection, continuous intrahepatic inflammation maintains a cycle of liver cell destruction and regeneration that often terminates in hepatocellular carcinoma (HCC). While the expression and retention of viral proteins in hepatocytes may influence the severity and progression of liver disease, the mechanisms of liver injury in viral hepatistis are defined to be due not to the direct cytopathic effects of viruses, but to the host immune response to viral proteins expressed by infected hepatocytes. In the process of liver injury, hepatocellular death (apoptosis) induced by the proapoptotic molecules of T cells activated following antigen recognition triggers a cascade of antigen nonspecific effector systems and causes necroinflammatory disease. Accordingly, the regulation of the immune response, e.g., via the cell death pathways, in chronically infected patients should prevent the development of HCC.
Keywords: viral hepatitis, hepatitis viruses, hepatitis b, hepatocellular carcinoma
Current Molecular Medicine
Title: Mechanisms of Viral Hepatitis Induced Liver Injury
Volume: 3 Issue: 6
Author(s): Yasunari Nakamoto and Shuichi Kaneko
Affiliation:
Keywords: viral hepatitis, hepatitis viruses, hepatitis b, hepatocellular carcinoma
Abstract: Among seven human hepatitis viruses (A to E, G and TT virus), hepatitis B (HBV) and C (HCV) viruses are able to persist in the host for years and principally contribute to the establishment of chronic hepatitis. During the course of persistent infection, continuous intrahepatic inflammation maintains a cycle of liver cell destruction and regeneration that often terminates in hepatocellular carcinoma (HCC). While the expression and retention of viral proteins in hepatocytes may influence the severity and progression of liver disease, the mechanisms of liver injury in viral hepatistis are defined to be due not to the direct cytopathic effects of viruses, but to the host immune response to viral proteins expressed by infected hepatocytes. In the process of liver injury, hepatocellular death (apoptosis) induced by the proapoptotic molecules of T cells activated following antigen recognition triggers a cascade of antigen nonspecific effector systems and causes necroinflammatory disease. Accordingly, the regulation of the immune response, e.g., via the cell death pathways, in chronically infected patients should prevent the development of HCC.
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Cite this article as:
Nakamoto Yasunari and Kaneko Shuichi, Mechanisms of Viral Hepatitis Induced Liver Injury, Current Molecular Medicine 2003; 3 (6) . https://dx.doi.org/10.2174/1566524033479591
DOI https://dx.doi.org/10.2174/1566524033479591 |
Print ISSN 1566-5240 |
Publisher Name Bentham Science Publisher |
Online ISSN 1875-5666 |
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