Sofosbuvir for previously untreated chronic hepatitis C infection

Eric Lawitz, Alessandra Mangia, David Wyles, Maribel Rodriguez-Torres, Tarek Hassanein, Stuart C. Gordon, Michael Schultz, Mitchell N. Davis, Zeid Kayali, K. Rajender Reddy, Ira M. Jacobson, Kris V. Kowdley, Lisa Nyberg, G. Mani Subramanian, Robert H. Hyland, Sarah Arterburn, Deyuan Jiang, John McNally, Diana Brainard, William T. SymondsJohn G. McHutchison, Aasim M. Sheikh, Zobair Younossi, Edward J. Gane

Research output: Contribution to journalArticlepeer-review


BACKGROUND: In phase 2 trials, the nucleotide polymerase inhibitor sofosbuvir was effective in previously untreated patients with chronic hepatitis C virus (HCV) genotype 1, 2, or 3 infection. METHODS: We conducted two phase 3 studies in previously untreated patients with HCV infection. In a single-group, open-label study, we administered a 12-week regimen of sofosbuvir plus peginterferon alfa-2a and ribavirin in 327 patients with HCV genotype 1, 4, 5, or 6 (of whom 98% had genotype 1 or 4). In a noninferiority trial, 499 patients with HCV genotype 2 or 3 infection were randomly assigned to receive sofosbuvir plus ribavirin for 12 weeks or peginterferon alfa-2a plus ribavirin for 24 weeks. In the two studies, the primary end point was a sustained virologic response at 12 weeks after the end of therapy. RESULTS: In the single-group study, a sustained virologic response was reported in 90% of patients (95% confidence interval, 87 to 93). In the noninferiority trial, a sustained response was reported in 67% of patients in both the sofosbuvir-ribavirin group and the peginterferon-ribavirin group. Response rates in the sofosbuvir-ribavirin group were lower among patients with genotype 3 infection than among those with genotype 2 infection (56% vs. 97%). Adverse events (including fatigue, headache, nausea, and neutropenia) were less common with sofosbuvir than with peginterferon. CONCLUSIONS: In a single-group study of sofosbuvir combined with peginterferon-ribavirin, patients with predominantly genotype 1 or 4 HCV infection had a rate of sustained virologic response of 90% at 12 weeks. In a noninferiority trial, patients with genotype 2 or 3 infection who received either sofosbuvir or peginterferon with ribavirin had nearly identical rates of response (67%). Adverse events were less frequent with sofosbuvir than with peginterferon. (Funded by Gilead Sciences; FISSION and NEUTRINO numbers, NCT01497366 and NCT01641640, respectively.)

Original languageEnglish
Pages (from-to)1878-1887
Number of pages10
JournalNew England Journal of Medicine
Issue number20
Publication statusPublished - May 16 2013

ASJC Scopus subject areas

  • Medicine(all)


Dive into the research topics of 'Sofosbuvir for previously untreated chronic hepatitis C infection'. Together they form a unique fingerprint.

Cite this