Vertex Pharmaceuticals announces study results of telaprevir-based regimen

Nov 2 2009

More than 80 percent of hepatitis C patients in each arm of the Phase 2 Study C208 achieved a sustained viral response (SVR) with a telaprevir-based regimen according to results of an intent-to-treat (ITT) analysis announced today by Vertex Pharmaceuticals Incorporated (Nasdaq: VRTX). The data from Study C208 will be presented in an oral presidential plenary session at the 60^th Annual Meeting of the American Association for the Study of Liver Diseases (AASLD), which began yesterday in Boston. Telaprevir is a hepatitis C virus (HCV) protease inhibitor being developed by Vertex Pharmaceuticals Incorporated in collaboration with Tibotec and Mitsubishi Tanabe Pharma.

Study C208 explored telaprevir-based regimens dosed either every 12 hours (q12h; twice daily) or every eight hours (q8h; three times daily) combined with either peg-IFN-alfa-2a (PEGASYS^®) or peg-IFN-alfa-2b (PEGINTRON^®) and ribavirin (RBV), for 12 weeks followed by an additional 12 weeks of peg-IFN and RBV in a response-guided trial design that included 161 treatment-naïve patients (intent-to-treat analysis) with genotype 1 hepatitis C virus (HCV) infection. Across the four arms, SVR rates were 82 and 83 percent in patients treated with the every 12 hour telaprevir-based regimen (PEGINTRON and PEGASYS, respectively) and 81 and 85 percent in patients treated with the every 8 hour regimen (PEGINTRON and PEGASYS, respectively). For the majority of patients, these SVR rates were obtained with a 24-week telaprevir-based regimen.

“With high SVR rates and similar safety outcomes between the twice-daily and three-times-daily treatment groups, the results from this exploratory study support the future evaluation of telaprevir-based regimens dosed twice daily,” said Professor Patrick Marcellin, M.D., from Beaujon Hospital in Clichy, France. “These results also highlight the potential future role for response-guided therapy with the goal of improving treatment outcomes and potentially shortening the duration of therapy for the majority of patients.”

Source: Vertex Pharmaceuticals