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Published on: September 30, 2021
[Consequences of extrahepatic manifestations of hepatitis C viral infection (HCV)]
1Zakład Immunopatologii Chorób Zakaźnych i Pasożytniczych Warszawski Uniwersytet Medyczny.
Insights
Chronic hepatitis C virus (HCV) infection causes numerous extrahepatic symptoms. Understanding these HCV manifestations and their mechanisms can improve diagnosis and treatment efficacy.
Area of Science:
- Hepatology
- Virology
- Immunology
Background:
- Hepatitis C virus (HCV) primarily infects the liver but causes diverse extrahepatic symptoms.
- These manifestations include cryoglobulinemia, kidney disease, neurological disorders, and endocrine/lymphoid issues.
- Mechanisms involve direct viral effects, immune responses (cytokines, oxidative stress), and antiviral treatments.
Purpose of the Study:
- To review the incidence of extrahepatic manifestations in HCV infection.
- To elucidate the pathogenetic mechanisms underlying these conditions.
- To identify risk factors associated with HCV-related extrahepatic diseases.
Main Methods:
- Literature review of scientific articles.
- Analysis of studies on HCV extrahepatic manifestations.
- Synthesis of pathogenetic pathways and risk factors.
Main Results:
- HCV infection is linked to a wide range of extrahepatic conditions.
- Both direct viral impact and indirect immune-mediated responses contribute to pathogenesis.
- Antiviral treatments can also influence the development or course of these symptoms.
Conclusions:
- Extrahepatic manifestations are a significant aspect of chronic HCV infection.
- Further research into mechanisms can identify prognostic factors for early diagnosis.
- Improved understanding may lead to enhanced therapeutic strategies for HCV patients.
Abstract:
The hepatitis C virus (HCV) is a primarily hepatotropic virus. However, numerous extrahepatic symptoms are observed in patients chronically infected with HCV, e.g. cryoglobulinemia, lymphoproliferative disorders, kidney diseases, disturbances of the central and peripheral nervous system, thyroid gland, pancreas, lymph nodes and pituitary gland, that develop at various times after the infection. Complex mechanisms underlie these processes, both molecular, related to direct effects of the virus on cells or tissues and indirect mechanisms, resulting from the response of the immune system to infection (via cytokines or oxidative stress), and from the antiviral treatment used. Understanding these mechanisms may contribute to the definition of new prognostic factors, important for the early diagnosis of the infection, which in turn may improve treatment efficacy. This paper is a review of the incidence of selected extrahepatic manifestations of HCV infection and their underlying pathogenetic mechanisms and risk factors.
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