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NS5A Inhibitor Daclatasvir Has Dual Mode of Action Against Hepatitis C Virus

The promising investigational hepatitis C virus (HCV) NS5A inhibitor daclatasvir targets 2 steps of the viral replication process, enabling very rapid HCV RNA reduction, according to a mathematical model described in the February 19, 2013, advance edition of Proceedings of the National Academy of Sciences.

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Updated Boceprevir (Victrelis) Label Adds Data on Prior Null Responders

The U.S. Food and Drug Administration (FDA) announced this week that the product label information for the hepatitis C virus (HCV) protease inhibitor boceprevir (brand name Victrelis) has been updated to include data on treatment of prior null responders.

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Hepatitis C Re-treatment with Interferon Monotherapy Provides Little Benefit

Long-term re-treatment with pegylated interferon monotherapy offers little or no clinical benefit -- even though it may suppress hepatitis C virus (HCV) levels and improve liver fibrosis -- but it can cause adverse events and may be associated with higher mortality, according to a systematic review from the Cochrane Library.

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HCV Polymerase Inhibitor Mericitabine Boosts Interferon/Ribavirin Cure Rate

A 24-week response-guided triple regimen consisting of Roche's NS5B polymerase inhibitor mericitabine plus pegylated interferon and ribavirin produced a greater likelihood of sustained viral suppression than a 48-week course of pegylated interferon/ribavirin alone, according to a report in the January 28, 2013, online advance edition of Hepatology.

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Sofosbuvir Combos Match or Beat Standard Hepatitis C Therapy For All Genotypes

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The experimental hepatitis C polymerase inhibitor sofosbuvir in an all-oral regimen with ribavirin worked as well as interferon-based therapy for previously untreated people with HCV genotypes 2 or 3, while adding sofosbuvir to pegylated interferon/ribavirin increased cure rates for those with more difficult-to-treat genotypes, Gilead Sciences announced this week.

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