Vertex Pharmaceuticals Inc (VRTX)

[surf1944]

7:03AM Vertex Pharm interim Phase 2 data showed a combination of VX-770 and VX-809 improved function of the defective protein that causes cystic fibrosis in people with the most common form of the disease (VRTX) 53.14 : Co announces interim results from the first part of a Phase 2 study designed to evaluate multiple combination regimens of VX-770 and VX-809, Vertex's lead medicines in development that aim to treat the defective protein that causes cystic fibrosis. The first part of the study met its two primary endpoints: (1) safety and tolerability of the combination regimen and (2) the effect of the combination of VX-770 and VX-809 on CFTR function as measured by sweat chloride, a key measure of the function of the CFTR protein. There were no serious adverse events reported, and the adverse event profile during the combination-dosing portion of the study (Day 14 to Day 21) was similar to that during the VX-809 monotherapy-dosing portion (Day 0 to 14). In the arm that evaluated VX-809 (200 mg) followed by dosing of VX-770 (250 mg) in combination with VX-809, a statistically significant reduction in sweat chloride of -13.17 mmol/L (p<0.001) was observed from baseline (Day 0) through Day 21. In this arm, a -9.10 mmol/L (p<0.001) reduction was observed after VX-770 (250 mg) was added to VX-809 (200 mg) for seven days (Day 14 to 21). Vertex intends to initiate the second part of this study in the fourth quarter of 2011 after the completion of further analyses of data from Part 1. The most commonly reported adverse events were respiratory in nature and occurred in approximately half of people across all arms of the study. One person receiving VX-809 in the monotherapy portion of the study discontinued treatment due to an increase in respiratory symptoms during the first 7 days of the study.