TY - JOUR T1 - Dose-related efficacy of GSK573719, a new long-acting muscarinic receptor antagonist (LAMA) offering sustained 24-hour bronchodilation, in COPD JF - European Respiratory Journal JO - Eur Respir J VL - 38 IS - Suppl 55 SP - p878 AU - Marc Decramer AU - Francois Maltais AU - Gregory Feldman AU - Jean Brooks AU - Lisa Willits AU - Stephanie Harris AU - Glenn Crater Y1 - 2011/09/01 UR - http://erj.ersjournals.com/content/38/Suppl_55/p878.abstract N2 - Introduction: GSK573719 is an inhaled LAMA with sustained 24-hour activity under development as a once-daily therapy for COPD.Objective: To evaluate the dose response of GSK573719 in patients with COPD.Methods: This was a multicentre, randomised, double-blind, placebo-controlled, parallel-group study evaluating GSK573719 administered once daily via a novel single-step activation dry powder inhaler in patients with COPD (FEV1 of ≥35 and ≤70% predicted). The primary endpoint was morning pre-dose (trough) FEV1 after 28 days of treatment.Results: All doses of GSK573719 significantly increased trough FEV1 compared with placebo, with improvement ranging from 150 to 168mL (p<0.001). All doses significantly increased 0–6 hour weighted mean FEV1 compared with placebo with differences ranging from 113 to 211mL (p<0.001). Additionally, all doses demonstrated significant improvements over placebo in serial FEV1 at each measured time point over 24 hours (p≤0.038). Reductions in albuterol use and improvements in FVC were also noted for all doses. All doses were well tolerated.Conclusion: Once-daily dosing with GSK573719 provides clinically significant and sustained improvement in lung function and is well tolerated over 24 hours in patients with COPD.Funded by GSK (AC4113589; NCT01030965) ER -