Vertex Pharma (VRTX) Says Lung Function Improvement from VX-809 Phase 2 Was Overstated in Last Release
Tweet
Share
E-mailGet Alerts VRTX Hot Sheet
Join SI Premium – FREE
Vertex Pharmaceuticals Inc. (Nasdaq: VRTX) announced a correction to the previously reported responder analysis, as well as additional data from, the recent interim analysis of an ongoing Phase 2 study of VX-809 and KALYDECO™ (ivacaftor) that showed significant improvements in lung function (forced expiratory volume in one second, FEV1) among adults with cystic fibrosis (CF) who have two copies (homozygous) of the most common mutation in the cystic fibrosis transmembrane conductance regulator (CFTR) gene, F508del. As previously announced, there was a statistically significant improvement in lung function (absolute change in percent predicted FEV1) across the combined treatment groups relative to baseline compared to placebo (p=0.002). Today’s announcement provides a correction to the responder analysis (n=37) for the absolute improvement in lung function compared to baseline and, for the first time, provides the mean absolute improvement in lung function compared to placebo observed among patients who received VX-809 (200mg, 400mg, 600mg; QD) and KALYDECO (250mg; q12h). The data reported today and earlier this month are based on 37 patients who completed 56 days of treatment with VX-809 and KALYDECO and 11 patients with one or two copies of the F508del mutation who received placebo. Vertex will host a conference call for investors and media today, May 29, 2012 at 8:00 a.m. ET, to discuss the correction and additional data.
On May 7, 2012, the company announced that approximately 46 percent (17/37) of patients with two copies of the F508del mutation experienced an improvement in lung function (FEV1) of 5 percentage points or more and approximately 30 percent (11/37) experienced an improvement of 10 percentage points or more from baseline to Day 56 when treated with the combination of VX-809 and KALYDECO. These results were relative improvements, not absolute improvements as originally reported.
The actual absolute improvements in lung function for these patients are: approximately 35 percent (13/37) experienced an absolute improvement of 5 percentage points or more and approximately 19 percent (7/37) experienced an absolute improvement of 10 percentage points or more from baseline to Day 56. As previously announced, none of the patients treated with placebo (0/11) achieved a 5 percentage-point or more mean absolute improvement in lung function from baseline to Day 56.
Additional data from the interim analysis are provided today for people with two copies of the F508del mutation. A mean absolute improvement in lung function of 8.5 percentage points was observed among those who were treated with VX-809 and KALYDECO compared to placebo (p=0.002). In addition, the within-group mean absolute improvement from baseline to Day 56 was 4.0 percentage points (p=0.002) for patients treated with the combination. From baseline to Day 56, those treated with placebo experienced a mean absolute decrease in lung function of 4.6 percentage points (p=0.04).
These data are from a planned interim analysis that was conducted after approximately half of the patients completed 56 days of treatment. Evaluation of patients with one copy (heterozygous, n=21) of the F508del mutation is ongoing. All patients have now completed dosing. Analyses are ongoing and complete data, including statistical analyses for all patient groups, will be available mid-year. Vertex plans to start a pivotal study of VX-809 and KALYDECO in people with two copies of the F508del mutation, pending final study results and discussions with regulatory agencies.
On May 7, 2012, the company announced that approximately 46 percent (17/37) of patients with two copies of the F508del mutation experienced an improvement in lung function (FEV1) of 5 percentage points or more and approximately 30 percent (11/37) experienced an improvement of 10 percentage points or more from baseline to Day 56 when treated with the combination of VX-809 and KALYDECO. These results were relative improvements, not absolute improvements as originally reported.
The actual absolute improvements in lung function for these patients are: approximately 35 percent (13/37) experienced an absolute improvement of 5 percentage points or more and approximately 19 percent (7/37) experienced an absolute improvement of 10 percentage points or more from baseline to Day 56. As previously announced, none of the patients treated with placebo (0/11) achieved a 5 percentage-point or more mean absolute improvement in lung function from baseline to Day 56.
Additional data from the interim analysis are provided today for people with two copies of the F508del mutation. A mean absolute improvement in lung function of 8.5 percentage points was observed among those who were treated with VX-809 and KALYDECO compared to placebo (p=0.002). In addition, the within-group mean absolute improvement from baseline to Day 56 was 4.0 percentage points (p=0.002) for patients treated with the combination. From baseline to Day 56, those treated with placebo experienced a mean absolute decrease in lung function of 4.6 percentage points (p=0.04).
These data are from a planned interim analysis that was conducted after approximately half of the patients completed 56 days of treatment. Evaluation of patients with one copy (heterozygous, n=21) of the F508del mutation is ongoing. All patients have now completed dosing. Analyses are ongoing and complete data, including statistical analyses for all patient groups, will be available mid-year. Vertex plans to start a pivotal study of VX-809 and KALYDECO in people with two copies of the F508del mutation, pending final study results and discussions with regulatory agencies.
Serious News for Serious Traders! Try StreetInsider.com Premium Free!
You May Also Be Interested In
- FDA authorizes 11 ZYN Ultra nicotine pouches for Philip Morris
- Sigma Lithium resumes full operations after signing TAC agreement
- CoVolt Power files for proposed IPO
Create E-mail Alert Related Categories
Corporate News, FDASign up for StreetInsider Free!
Receive full access to all new and archived articles, unlimited portfolio tracking, e-mail alerts, custom newswires and RSS feeds - and more!
