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Published on: May 9, 2025
Asunaprevir-containing regimens for the treatment of hepatitis C virus infection
Sheng-Shun Yang1, Jia-Horng Kao
1Department of Internal Medicine, Division of Gastroenterology and Hepatology, Taichung Veterans General Hospital, Taichung, Taiwan.
Insights
Hepatitis C Virus (HCV) treatment is shifting to interferon- and ribavirin-free regimens. Asunaprevir (ASV), an NS3 protease inhibitor, shows promise with fewer side effects in combination therapies.
Area of Science:
- Hepatology and Viral Gastroenterology
- Infectious Diseases and Microbiology
Background:
- Chronic Hepatitis C Virus (HCV) infection poses a significant global health burden, causing decompensated cirrhosis and hepatocellular carcinoma.
- Current interferon (IFN)-based therapies have limitations including adverse effects, contraindications, and poor tolerability, impacting patient adherence and treatment success.
Purpose of the Study:
- To review the preclinical and clinical data of asunaprevir (ASV), a novel NS3 protease inhibitor.
- To evaluate the role of ASV in emerging interferon- and ribavirin-free HCV treatment strategies.
Main Methods:
- Review of preclinical profiles and clinical proof-of-concept studies involving asunaprevir (ASV).
- Analysis of viral resistance, host genetic factors (polymorphism), and the potential of ASV in future HCV therapeutic regimens.
Main Results:
- Asunaprevir (ASV), as part of combination therapies, demonstrates promising efficacy with a favorable safety profile compared to traditional treatments.
- Emerging data suggests ASV can be utilized in both interferon/ribavirin-containing and interferon/ribavirin-free regimens.
Conclusions:
- Asunaprevir (ASV) represents a significant advancement in the development of direct-acting antivirals for HCV.
- The integration of ASV into IFN/RBV-free strategies offers a more tolerable and potentially more effective approach to HCV eradication.
Abstract:
Chronic hepatitis C virus (HCV) infection has been a tremendous health burden worldwide with an annual mortality of 300,000 people due to decompensated cirrhosis or hepatocellular carcinoma. A combination of interferon (IFN), ribavirin (RBV), and/or direct-acting antivirals (DAAs) can eradicate HCV in a various proportion of infected patients. Unfortunately, IFN-based therapy is associated with significant adverse effects, contraindications, and limited tolerability, leading to lower adherence or even treatment discontinuation. With the rapid evolution of newer DAAs or host-targeting agents, emerging HCV therapy is moving towards an IFN- and RBV-free strategy. To this end, a recently developed NS3 protease inhibitor, asunaprevir (ASV), in combination with other DAAs as IFN/RBV-containing or -free regimen, has shown promising results with fewer adverse effects. In this review, preclinical profiles and clinical proof-of-concept studies of ASV, including viral resistance, host polymorphism, and role of ASV in future HCV therapy are reviewed and discussed.
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