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Hepatitis C virus infection: diagnosis, natural course and therapy
1Department of Gastroenterology and Hepatology, Medizinische Hoschschule Hannover, Germany.
Insights
Hepatitis C virus infection often leads to chronic carriers, diagnosed by detecting antibodies and RNA. Treatment effectiveness varies, with specific patient factors predicting outcomes, while liver transplantation is used for advanced disease.
Area of Science:
- Virology
- Hepatology
- Immunology
Background:
- Hepatitis C virus (HCV) is a significant cause of chronic liver disease.
- Over 80% of infected individuals develop a chronic carrier state.
- Diagnosis relies on detecting HCV antibodies and HCV RNA.
Purpose of the Study:
- To review current diagnostic methods for hepatitis C.
- To discuss treatment strategies and predictive factors for response.
- To highlight knowledge gaps in hemodialysis patients.
Main Methods:
- Detection of hepatitis C virus antibodies.
- Quantification of HCV RNA levels.
- Determination of HCV genotypes.
Main Results:
- Interferon monotherapy achieves long-term response in 10-20% of patients.
- Positive predictors include low transaminases, low viremia, and low histological activity.
- Negative predictors include cirrhosis, high ferritin, and autoimmunity markers.
Conclusions:
- Combination therapy (interferon with ribavirin) is under evaluation.
- Liver transplantation is used for end-stage cirrhosis, with regular graft reinfection.
- Further research is needed on hepatitis C in hemodialysis patients.
Abstract:
The hepatitis C virus is a 9.4-kb single-stranded positive RNA virus. After infection, more than 80% of patients develop a chronic carrier state. The diagnosis is based on the detection of hepatitis C virus antibodies and of HCV RNA. Recently, methods have been established to quantify HCV RNA levels and determine HCV genotypes. Interferon treatment gives long-term response in 10-20% of individuals. Low transaminase levels, low levels of viremia and low histological activity are positive predictive parameters for treatment response. In contrast, cirrhosis, high ferritin levels and associated markers of autoimmunity are negative predictors of treatment response. At present, the combination of interferon with the nucleoside analogue ribavirin is being evaluated. Endstages of hepatitis-C-induced cirrhosis are treated with liver transplantation. Reinfection of the graft occurs regularly, the clinical implications of which are not yet clear. Our knowledge of the spontaneous course and treatment response of hepatitis C infection in hemodialysis patients is limited.