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[The extrahepatic manifestations in hepatitis C virus (HCV) infection]
Insights
Hepatitis C virus (HCV) infection impacts more than the liver, causing numerous extrahepatic lesions. Understanding these diverse manifestations is crucial for effective treatment strategies.
Area of Science:
- Hepatology
- Virology
- Immunology
Context:
- Hepatitis C virus (HCV) infection is increasingly recognized for its systemic effects beyond the liver.
- Extrahepatic manifestations (EHMs) associated with HCV are diverse and numerous.
- Established links exist between HCV and conditions like mixed cryoglobulinemia, membranoproliferative glomerulonephritis, and porphyria cutanea tarda.
Purpose:
- To explore the expanding range of extrahepatic lesions associated with Hepatitis C virus (HCV) infection.
- To discuss the potential pathogenetic mechanisms, including immune system involvement and viral replication, underlying HCV-related EHMs.
- To highlight the therapeutic challenges posed by the poorly understood mechanisms of HCV EHMs.
Summary:
- HCV infection affects multiple organs and systems, leading to a growing list of documented extrahepatic lesions.
- Confirmed associations include mixed cryoglobulinemia, membranoproliferative glomerulonephritis, and porphyria cutanea tarda.
- HCV's role in thyroid disease, Sjögren's syndrome, lichen planus, diabetes, and antiphospholipid syndrome is under investigation.
- Pathogenesis may involve immune dysregulation or direct viral activity in affected tissues.
- Unclear mechanisms complicate treatment choices, particularly regarding interferon and corticosteroids.
Impact:
- This research underscores the systemic nature of HCV infection, necessitating a broader clinical perspective.
- It emphasizes the need for further research into the pathogenesis of HCV-related extrahepatic manifestations.
- Improved understanding of these mechanisms could lead to more targeted and effective therapeutic interventions for HCV patients.
Abstract:
The hepatitis C virus (HCV) infection could affect not only the liver, but also other tissues, organs and systems. The number of the reported in the literature extrahepatic lesions by HCV incessantly increases. A reliable association between the infections by HCV and the mixed cryoglobulinaemias, membrano-proliferative glomerulonephritis and porphyria cutanea tarda is confirmed. The participation of HCV in the pathogenesis of some diseases of the thyroid gland, the lymphocytic sialadenitis, lichen planus, diabetes mellitus, thrombocytopenia, antiphospholipid syndrome, etc., is assumed. The extrahepatic lesions by HCV are probably connected with the participation of the immune system, but they may be as well due to the replicating virus in the affected tissues, organs and systems. The pathogenetic mechanisms of the extrahepatic and autoimmune manifestations of the infection with HCV are not elucidated, which poses difficult therapeutic problems regarding the choice of interferon and/or corticosteroid hormones.