Vertex Pharmaceuticals Highlights HCV - Telaprevir Development Program

Main Category: Liver Disease / Hepatitis
Also Included In: Clinical Trials / Drug Trials;  Pharma Industry / Biotech Industry
Article Date: 28 Oct 2008 - 5:00 PDT

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Phase 3 Development in Treatment-Naïve Population

- Vertex and Tibotec have completed enrollment in the global 3-arm pivotal Phase 3 ADVANCE trial that is focused on 24-week telaprevir-based response-guided regimens. In the ADVANCE study, telaprevir is being dosed for 8 or 12 weeks. Vertex expects to have sustained viral response (SVR) data from the study in the first half of 2010.

- Vertex has begun enrollment in a study of 500 treatment-naïve HCV patients that will include evaluation of 24-week and 48-week telaprevir-based regimens. These regimens include 12-week telaprevir dosing durations. The Company expects to complete enrollment in this study by the end of 2008 and expects to have SVR data from the study in the first half of 2010.

Phase 3 Development in Patients Who Failed to Achieve SVR with Prior Treatment

- Patient dosing is underway in the Phase 3 REALIZE clinical study of telaprevir in patients who failed to achieve SVR with prior treatment of pegylated interferon (peg-IFN) and ribavirin (RBV). This study is focused on 48-week telaprevir-based regimens, which include dosing of telaprevir for 12 weeks. REALIZE is expected to complete enrollment of approximately 650 patients in the United States and Europe in the first quarter of 2009.

Interim Analysis of Telaprevir Twice-Daily Dosing Regimen

- In July, Vertex reported results of an interim analysis of study C208, a four-arm Phase 2a clinical study of approximately 160 genotype 1 treatment-naïve HCV patients. The interim results showed that greater than 80% of patients (intent-to-treat analysis) had undetectable HCV RNA (<10 IU/mL) at weeks 4 and 12 in both the twice-daily and three times daily dosing arms of telaprevir, with pegylated interferon alfa-2a (PEGASYS) and RBV. The type and frequency of adverse events across the study arms were generally consistent with previous studies of telaprevir. No substantial differences in safety profile between twice daily and three times daily dosing regimens were observed. These data support continued clinical evaluation of twice-daily dosing of telaprevir.

Telaprevir Clinical Data

AASLD - Six abstracts on telaprevir have been accepted for presentation at the 59th Annual Meeting of the American Association for the Study of Liver Diseases (AASLD), October 31st - November 4th in San Francisco, including presentations that include final results from the PROVE 2 study in treatment-naïve patients, interim data from the PROVE 3 study and Study 107 in treatment failure patients, and interim results from study C208 evaluating twice-daily dosing of telaprevir.

Updates on the status of telaprevir clinical trials are available at http://www.clinicaltrials.gov.

Two Additional Novel HCV Protease Inhibitors in Clinical Development

Vertex is advancing a portfolio of HCV protease inhibitors with potentially differentiated profiles. Vertex has initiated a Phase 1b clinical trial of VX-500 in patients with HCV and expects data from this study in the first quarter of 2009. Vertex also has initiated Phase 1 clinical development of VX-813.

About Vertex

Vertex Pharmaceuticals Incorporated is a global biotechnology company committed to the discovery and development of breakthrough small molecule drugs for serious diseases. The Company's strategy is to commercialize its products both independently and in collaboration with major pharmaceutical companies. Vertex's product pipeline is focused on viral diseases, inflammation, autoimmune diseases, cancer, pain and cystic fibrosis. Vertex co-discovered the HIV protease inhibitor, Lexiva, with GlaxoSmithKline.

Lexiva is a registered trademark of the GlaxoSmithKline group of companies.

PEGASYS is a registered trademark of Hoffman-La Roche Ltd.

Special Note Regarding Forward-looking Statements

This press release contains forward-looking statements, including statements regarding Vertex's expectation that (i) it is positioned to make a major impact on the treatment of HCV and CF, with the potential to conduct registration programs in parallel in 2009, (ii) it is well-positioned financially to support investment in its HCV and CF opportunities, (iii) it will have SVR data from the ADVANCE study in the first half of 2010, (iv) it will enroll approximately 500 patients in a Phase 3 clinical trial to evaluate 24-week and 48-week telaprevir-based regimens by the end of 2008 and SVR data from this study will be available in the first half of 2010, (v) the REALIZE study will complete enrollment in the first quarter of 2009, (vi) interim data from Phase 2 clinical study evaluating telaprevir dosing regimens support continued evaluation of twice-daily dosing of telaprevir, (vii) data from Phase 1b clinical trial of VX-500 in HCV patients will be available in the first quarter of 2009, (viii) it will reach agreement with regulatory authorities on a registration program for VX-770 and initiate the study in the first half of 2009, (ix) it will initiate a Phase 2a clinical trial of VX-809 in patients with CF in the first half of 2009, (x) VX-509 will be investigated for the treatment of multiple immune-mediated inflammatory diseases, (xi) the 2008 guidance (including its estimates of stock-based compensation expense) will be in the ranges referenced in the Company's previous guidance. While the Company believes the forward-looking statements contained in this press release are accurate, there are a number of factors that could cause actual events or results to differ materially from those indicated by such forward-looking statements. Those risks and uncertainties include, among other things, that the outcomes for each of its planned clinical trials and studies, and in particular its planned clinical trials of telaprevir and VX-770, may not be favorable, that regulatory authorities may require supplemental clinical trials in order to support registration of telaprevir in any particular indication, that the Company will not be able to secure agreement from regulatory authorities on a registration program for VX-770, that there may be varying interpretations of data produced in one or more of our clinical trials, that enrollment may be more difficult or slower than we currently anticipate or that planned clinical trials may not start when planned due to regulatory issues, site startup delays, availability of clinical trial material or other reasons, that regulatory authorities will require more extensive data for a telaprevir or VX-770 NDA filing than currently expected, that one or more of the Company's assumptions underlying its revenue expectations -- including clinical and scientific progress that could lead to milestone payments under existing collaboration agreements or payments under new collaborations -- or its expense expectations -- including estimates of the variables that go into determining stock-based compensation expenses -- will not be realized, that unexpected costs associated with one or more of the Company's programs will necessitate a change in the Company's financial projections, that future competitive or other market factors may adversely affect the commercial potential for the Company's product candidates in HCV or cystic fibrosis , and other risks listed under Risk Factors in Vertex's annual report and quarterly reports filed with the Securities and Exchange Commission and available through the Company's website at http://www.clinicaltrials.gov. Vertex disclaims any obligation to update the information contained in this press release as new information becomes available.

Source
Michael Partridge
Vertex Pharmaceuticals Incorporated

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