Theravance Announces Positive Phase 2 Clinical Results In The MABA Respiratory Program For The Treatment Of COPD
"We are very encouraged by the results of this study," said Rick Winningham, Chief Executive Officer of Theravance. "'081 is the first compound studied in COPD patients that combines the activity of both a beta2 agonist and a muscarinic antagonist in a single small molecule. We believe that this compound may provide a new monotherapy treatment option for the increasing number of patients living with COPD, or potentially as combination therapy with an anti-inflammatory medication."
GSK961081 is being investigated as an inhaled multivalent bifunctional bronchodilator that is a single small molecule functioning both as a muscarinic antagonist and a beta2 receptor agonist. This compound was discovered by Theravance through the application of multivalent design in a discovery program dedicated to finding new medicines for respiratory diseases such as COPD and asthma. '081 is under development by GSK and Theravance as a potential treatment for patients with COPD.
In the recently completed Phase 2 study, both doses of '081 (400 mcg and 1,200 mcg) administered once daily demonstrated 24-hour bronchodilation on day 14 that was statistically greater than placebo and comparable to a combination therapy active control of salmeterol (50 mcg) dosed twice daily plus tiotropium (18 mcg) dosed once daily. At 24 hours on day 14 of treatment, 400 and 1,200 mcg doses of '081 produced placebo-adjusted, dose-dependent mean changes in FEV1 (forced expiratory volume in one second) of 115 mL (p=0.013) and 168 mL (p < 0.001), respectively, while the active control of salmeterol plus tiotropium showed a change of 103 mL (p=0.009). This study was not powered to compare the results of salmeterol plus tiotropium control. Both the time to peak effect and the maximum bronchodilation of '081 at both doses were numerically better than salmeterol plus tiotropium control.
GSK961081 was generally well tolerated throughout the 14-day study. Adverse events occurred at a similar rate in the treatment and control groups, except for a low incidence of dry mouth (N=1/32) and tremor (N=2/32) in the high-dose '081 treatment group and a low incidence of abnormal taste at both doses. Adverse events were generally mild or moderate, with the most common adverse events being headache and dizziness, which were seen with similar frequency in the placebo and active control arms. There were no serious adverse events reported in the study.
The Phase 2 clinical study was a randomized, crossover, incomplete block, double-blind, double-dummy, placebo- and active-controlled study designed to evaluate the safety and efficacy of '081 (400 mcg and 1,200 mcg) administered once daily for 14 days in a dry powder inhaler. A total of 50 patients with COPD of moderate severity were randomized to receive '081 dosed once daily, the combination of salmeterol dosed twice daily plus tiotropium dosed once daily, or placebo. The primary endpoint of this study was mean change in FEV1 for '081 or salmeterol plus tiotropium-treated patients compared to placebo.
Theravance is a biopharmaceutical company with a pipeline of internally discovered product candidates. Theravance is focused on the discovery, development and commercialization of small molecule medicines across a number of therapeutic areas including respiratory disease, bacterial infections and gastrointestinal motility dysfunction. The company's key programs include: telavancin for the treatment of serious Gram-positive bacterial infections with Astellas Pharma Inc., the Horizon program with GlaxoSmithKline plc, and the Gastrointestinal Motility Dysfunction program. By leveraging its proprietary insight of multivalency toward drug discovery focused primarily on validated targets, Theravance is pursuing a next generation strategy designed to discover superior medicines in areas of significant unmet medical need. For more information, please visit the company's web site at http://www.theravance.com.
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