Conditions: Pulmonary Disease, Chronic Obstructive
Keywords: chronic obstructive pulmonary disease, GSK573719, muscarinic receptor antagonist
Allocation: RANDOMIZED | Intervention model: CROSSOVER
Enrollment: 24
Healthy volunteers: no

Brief summary:
GSK573719 is a high-affinity specific muscarinic receptor (mAChR) antagonist which is being developed for once daily treatment of chronic obstructive pulmonary disease (COPD). The long duration of action of GSK573719 when administered via inhalation in animal models supports the potential for use as a once-daily bronchodilator for COPD.

Detailed description:
A randomised, double blind, placebo-controlled, double dummy, 4-way cross-over, dose ascending study to assess the safety, tolerability, pharmacodynamics and pharmacokinetics of single inhaled doses of GSK573719 (3 escalating mcg doses will be used) and tiotropium bromide (18µg) via DPI in COPD patients

Arms:
arm 1: Participants received single doses of 4 treatments, over 4 treatment periods, in the following sequence: umeclidinium bromide (UMEC) 250 micrograms (µg), UMEC 500 µg, Tiotropium 18 µg and placebo. Treatment periods were seperated by a washout period of at least 14 days. arm 2: Participants received single doses of 4 treatments, over 4 treatment periods, in the following sequence: UMEC 250 µg, UMEC 500 µg, UMEC 1000 µg and placebo. Treatment periods were seperated by a washout period of at least 14 days. arm 3: Participants received single doses of 4 treatments, over 4 treatment periods, in the following sequence: UMEC 250 µg, placebo, UMEC 500 µg and UMEC 1000 µg. Treatment periods were seperated by a washout period of at least 14 days. arm 4: Participants received single doses of 4 treatments, over 4 treatment periods, in the following sequence: UMEC 250 µg, UMEC 500 µg, placebo and UMEC 1000 µg. Treatment periods were seperated by a washout period of at least 14 days. arm 5: Participants received single doses of 4 treatments, over 4 treatment periods, in the following sequence: Placebo, UMEC 250 µg, UMEC 500 µg and UMEC 1000 µg. Treatment periods were seperated by a washout period of at least 14 days. arm 6: Participants received single doses of 4 treatments, over 4 treatment periods, in the following sequence: UMEC 250 µg, placebo, Tiotropium 18 µg and UMEC 500 µg. Treatment periods were seperated by a washout period of at least 14 days. arm 7: Participants received single doses of 4 treatments, over 4 treatment periods, in the following sequence: Placebo, Tiotropium 18 µg, UMEC 250 µg and UMEC 500 µg. Treatment periods were seperated by a washout period of at least 14 days. arm 8: Participants received single doses of 4 treatments, over 4 treatment periods, in the following sequence: Tiotropium 18 µg, placebo, UMEC 250 µg and UMEC 500 µg. Treatment periods were seperated by a washout period of at least 14 days. arm 9: Participants received single doses of 4 treatments, over 4 treatment periods, in the following sequence: Tiotropium 18 µg, UMEC 250 µg, UMEC 500 µg and placebo. Treatment periods were seperated by a washout period of at least 14 days. arm 10: Participants received single doses of 4 treatments, over 4 treatment periods, in the following sequence: Tiotropium 18 µg, UMEC 250 µg, placebo and UMEC 500 µg. Treatment periods were seperated by a washout period of at least 14 days. arm 11: Participants received single doses of 4 treatments, over 4 treatment periods, in the following sequence: Placebo, UMEC 250 µg, Tiotropium 18 µg and UMEC 500 µg. Treatment periods were seperated by a washout period of at least 14 days. arm 12: Participants received single doses of 4 treatments, over 4 treatment periods, in the following sequence: UMEC 250 µg, placebo, UMEC 500 µg and Tiotropium 18 µg. Treatment periods were seperated by a washout period of at least 14 days.

Interventions: intervention 1: GSK573719 intervention 2: Tiotropium
Intervention descriptions: intervention 1: 250 micrograms (μg) per blister, administered via dry powder inhaler, dose-ascending study doses began at 250 ug, then 500 ug, and 1000 μg intervention 2: strips of five capsules, each containing 18 μg administered via dry powder inhaler

Protocol document: