Achievement of a sustained virologic response (SVR) after peginterferon (PEG-IFN) and ribavirin (RBV) treatment is considered to be a marker for the cure of chronic hepatitis C virus (HCV) infection. Long-term follow-up of patients with SVR after treatment with a direct acting antiviral has not yet been described. We used a randomized placebo-controlled, double-blind, two-period phase 1b trial that was conducted in 40 HCV genotype 1 (treatment-naïve and treatment-experienced)-infected patients. Nineteen patients achieved SVR after treatment with the HCV protease inhibitor narlaprevir followed by PEG-IFN/RBV. In these patients, HCV-RNA tests were scheduled at 3, 6, 12 and 24 months after end of treatment. Patients were followed for a median of 27 months (range 15-32) after end of treatment with a median number of follow-up visits of 4 (range 3-8). All patients remained HCV-RNA negative over time. SVR achieved following narlaprevir and PEG-IFN/RBV-therapy was durable up to 32 months after the end of treatment. © 2013 Blackwell Publishing Ltd.

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Keywords direct acting antivirals, durable, hepatitis C, sustained virologic response
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Hotho, D.M, Bruijne, J, Spaan, M, Treitel, M.A, Boonstra, P.A, de Knegt, R.J, … Reesink, H.W. (2013). Sustained virologic response after therapy with the HCV protease inhibitor narlaprevir in combination with peginterferon and ribavirin is durable through long-term follow-up. doi:10.1111/jvh.12012