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Host-targeting agents for prevention and treatment of chronic hepatitis C - perspectives and challenges
Mirjam B Zeisel1, Joachim Lupberger, Isabel Fofana
1Inserm, U748, Strasbourg, France. Mirjam.Zeisel@unistra.fr
Abstract:
Hepatitis C virus (HCV) infection is a major cause of chronic liver disease and hepatocellular carcinoma worldwide. Furthermore, HCV-induced liver disease is a major indication of liver transplantation. In the past years, direct-acting antivirals (DAAs) targeting HCV enzymes have been developed. DAAs increase the virologic response to anti-HCV therapy but may lead to selection of drug-resistant variants and treatment failure. To date, strategies to prevent HCV infection are still lacking and antiviral therapy in immunocompromised patients, patients with advanced liver disease and HIV/HCV-co-infection remains limited. Alternative or complementary approaches addressing the limitations of current antiviral therapies are to boost the host's innate immunity or interfere with host factors required for pathogenesis. Host-targeting agents (HTAs) provide an interesting perspective for novel antiviral strategies against viral hepatitis since they have (i) a high genetic barrier to resistance, (ii) a pan-genotypic antiviral activity, and (iii) complementary mechanisms of action to DAAs and might therefore act in a synergistic manner with current standard of care or DAAs in clinical development. This review highlights HTAs against HCV infection that have potential as novel antivirals and are in preclinical or clinical development.
Insights
Host-targeting agents (HTAs) offer a promising new strategy against Hepatitis C virus (HCV) infection. These agents complement existing treatments by boosting immunity and have potential for broad application in difficult-to-treat patient groups.
Area of Science:
- Hepatology
- Virology
- Immunology
Background:
- Hepatitis C virus (HCV) causes chronic liver disease and hepatocellular carcinoma, often necessitating liver transplantation.
- Direct-acting antivirals (DAAs) have improved treatment but face challenges like drug resistance and limited efficacy in certain patient populations (e.g., immunocompromised, advanced liver disease, HIV/HCV co-infection).
Purpose of the Study:
- To review host-targeting agents (HTAs) as a novel antiviral strategy against HCV.
- To highlight HTAs in preclinical and clinical development for treating viral hepatitis.
Main Methods:
- Literature review of host-targeting agents (HTAs) for Hepatitis C virus (HCV) infection.
- Analysis of HTA characteristics, including resistance barriers, antiviral activity, and synergy with existing therapies.
Main Results:
- HTAs present a high genetic barrier to resistance and exhibit pan-genotypic antiviral activity.
- HTAs offer complementary mechanisms to DAAs, suggesting potential synergistic effects.
- Several HTAs are currently in preclinical or clinical development for HCV treatment.
Conclusions:
- HTAs represent a promising alternative or complementary approach to current antiviral therapies for HCV.
- Their unique properties make them valuable for overcoming limitations of DAAs and treating complex patient cases.
- Further development of HTAs could significantly advance HCV treatment strategies.
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