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Telaprevir Phase 3 Studies Update
  January 12, 2009 08:00 AM Eastern Time
AASLD Nov 2008 Telaprevir NATAP reports:
Phase 2 Study of Telaprevir Administered q8h or q12h with Peginterferon Alfa-2a or Alfa-2b and Ribavirin in Treatment-naive Patients with Genotype 1 Hepatitis C: Week 12 Interim Results - (11/26/08)
A Study of Telaprevir Combined with Peginterferon Alfa-2a and Ribavirin in Patients with Well-documented Non-response or Relapse After Previous Peginterferon Alfa-2a and Ribavirin Treatment: Interim Analysis - (11/20/08)
Telaprevir in Combination with Peginterferon-a-2a With or Without Ribavirin in the Treatment of Chronic Hepatitis C Treatment-Naive Genotype 1: Final Results of the PROVE2 Study (conducted in Europe) - (11/06/08)
A Phase 2b Study of Telaprevir with Peginterferon-Alfa-2a and Ribavirin in Hepatitis C Genotype 1 Null and Partial Responders and Relapsers Following a Prior Course of Peginterferon-Alfa-2a/b and Ribavirin Therapy: PROVE3 Interim Results - (11/06/08)
- Broad telaprevir registration program for treatment-naive and treatment-failure HCV patients nears enrollment completion -
Broad Clinical Development Program for Telaprevir
ADVANCE and ILLUMINATE trials in treatment-naive patients fully enrolled

* Vertex today announced that the ILLUMINATE clinical trial is fully enrolled. Together with the ADVANCE clinical trial, which was fully enrolled in October 2008, Vertex has enrolled more than 1,500 genotype 1 treatment-naive HCV patients as part of the Companyüfs broad registration program for telaprevir:
- ADVANCE: Vertex and Tibotec completed enrollment in October 2008 in the global 3-arm pivotal Phase 3 ADVANCE trial that is focused on 24-week telaprevir-based response-guided regimens in genotype 1 treatment-naive HCV patients. In the ADVANCE trial, telaprevir is being dosed for 8 or 12 weeks. All patients are expected to have completed 8 or 12 weeks of dosing with telaprevir or placebo by the end of January 2009. Vertex expects to have sustained viral response (SVR) data from the ADVANCE trial in the first half of 2010. The ADVANCE trial enrolled approximately 1,050 patients.
- ILLUMINATE: Vertex today announced that the Company has completed enrollment in the global 2-arm ILLUMINATE trial that will include evaluation of 24-week and 48-week telaprevir-based regimens in genotype 1 treatment-naive HCV patients. In the ILLUMINATE trial, telaprevir is being dosed for 12 weeks. The Company expects to have SVR data from the ILLUMINATE trial in the first half of 2010, which will supplement SVR data obtained from the pivotal Phase 3 ADVANCE trial. The ILLUMINATE trial enrolled approximately 500 patients.
Differentiated profile in treatment-failure patients
* Full enrollment of approximately 650 patients in the global 3-arm pivotal Phase 3 REALIZE clinical trial is expected in the first quarter of 2009. This trial is focused on 48-week telaprevir-based regimens in genotype 1 HCV patients who failed to achieve SVR with prior treatment of pegylated interferon (peg-IFN) and ribavirin (RBV). The REALIZE trial is expected to enroll relapser, partial responder and the most difficult to treat null responder patients who are well-documented with respect to their prior response to HCV therapy. In the REALIZE trial, telaprevir is being dosed for 12 weeks.
* Vertex presented interim clinical data, including safety information, from the Phase 2 PROVE 3 trial in November 2008 at AASLD. The data showed a 52% SVR12 rate in treatment-failure HCV patients, with a 24-week telaprevir-based treatment regimen. All patients in PROVE 3 completed dosing in the second quarter of 2008. Vertex expects to present final SVR data from the telaprevir and control arms of PROVE 3 at a medical meeting in the first half of 2009.
Vertex exploring utility of telaprevir in other patient populations and dosing regimens
* Interim results presented in November 2008 from the ongoing, Phase 2, open-label, randomized C208 study examining a twice-daily (q12h) telaprevir dosing regimen versus a three-times-daily (q8h) regimen in combination with RBV and peg-IFN-alfa-2a (PEGASYS) or peg-IFN-alfa-2b (PEGINTRON■) in treatment-naive genotype 1 HCV patients, including safety information from the study, support the potential for twice-daily dosing of telaprevir. Tibotec expects to present additional data from this trial, including SVR data for patients who completed dosing and have been followed 24 weeks post-treatment, at a medical meeting in 2009.
* Vertex and Tibotec plan to discuss a proposed HIV/HCV co-infection program with the U.S. FDA and European health authorities in the coming months.
HCV portfolio strategy advancing
* Vertex is also developing VX-500 and VX-813, additional HCV protease inhibitors that are currently in Phase 1 clinical development. Vertex expects to have safety, pharmacokinetic and viral kinetic data for VX-500 from Phase 1 studies in the first quarter of 2009.
* The combination of telaprevir with other novel specifically targeted antiviral therapies for HCV (STAT-C) is a key business priority for Vertex in 2009. The Company continues to evaluate other STAT-C agents as they advance in clinical development.
Vertex collaborator initiates Phase 3 clinical development in Japan
* Vertex today announced that its collaborator Mitsubishi Tanabe Pharma Corporation has initiated Phase 3 clinical development of telaprevir that is designed to include evaluation of 24-week telaprevir-based regimens in approximately 300 genotype 1 treatment-naive and treatment-failure HCV patients in Japan. In Phase 3 studies of telaprevir being conducted by Mitsubishi, telaprevir is being dosed for 12 weeks in combination with peg-IFN-alfa-2b (PEGINTRON■) and RBV. Mitsubishi expects to have SVR data from its Phase 3 clinical trials of telaprevir in mid-2011.
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