alexa New direct-acting antivirals in the development for hepatitis C virus infection.
Microbiology

Microbiology

Journal of Antivirals & Antiretrovirals

Author(s): Pockros PJ

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Abstract A large number of new therapies are in development for chronic hepatitis C including direct-acting antiviral drugs (DAA), which target specific hepatitis C virus enzymes. Two of these compounds have already advanced into phase 3 development in the USA and EU, and many more are in phase 2 trials and likely to advance. In this review, the results of recent studies on ribavirin analogues, nonstructural (NS) 3/4 serine protease inhibitors, NS5B polymerase inhibitors, cyclophilin inhibitors, silimarin components, and thiazolides have been updated. Each compound includes a brief summary of its proposed mechanism of action, results of early clinical trials, and more advanced trial data where available. These compounds are likely to be the first approved in the USA and EU and will initially be used in combination with the current standard of care. It is possible that future treatment paradigms with these agents will offer the potential of interferon-free regimens. It is most likely that patients for these new therapies will be selected carefully by identifying and treating first those who have excellent sustained virologic response rates with 24 weeks of pegylated interferon and ribavirin, the current standard of care. It is also likely that there will be a need to identify those patients who are not likely to have a sustained virologic response with the addition of a protease inhibitor to the current standard of care and delaying their therapy until combination viral suppression therapy becomes an option. The cost and side effects of the DAA will be important considerations for treating physicians. This review is current through 2009; however, data are rapidly changing.
This article was published in Therap Adv Gastroenterol and referenced in Journal of Antivirals & Antiretrovirals

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