Conditions: Gout
Keywords: Gout Chronic gout Gouty arthritis Gout flares
Allocation: RANDOMIZED | Intervention model: PARALLEL
Enrollment: 432
Healthy volunteers: no

Brief summary:
The 24-week, dose-ranging, multi-center, double-blind, double-dummy, active-controlled core study investigated the prophylactic effect of canakinumab on the signs and symptoms of acute flares in chronic gout patients initiating allopurinol therapy. The core study was followed by a 24-week open-label, multicenter extension study to assess the safety, tolerability, and efficacy of canakinumab in patients with gout who were given canakinumab at the time of gout flare.

Detailed description:

Arms:
arm 1: Canakinumab 25 mg subcutaneously (sc) once at Day 1, placebo sc at Days 29, 57, and 85 plus daily placebo capsules for 16 weeks. Allopurinol treatment was initiated at the latest at baseline (Visit 2) according to the patient's renal function / estimated creatinine clearance at screening (Visit 1). Allopurinol was administered orally to all randomized patients once daily (100 mg-300 mg) for 24 weeks. arm 2: Canakinumab 50 mg sc once at Day 1, placebo sc at Days 29, 57, and 85 plus daily placebo capsules for 16 weeks. Allopurinol treatment was initiated at the latest at baseline (Visit 2) according to the patient's renal function / estimated creatinine clearance at screening (Visit 1). Allopurinol was administered orally to all randomized patients once daily (100 mg-300 mg) for 24 weeks. arm 3: Canakinumab 100 mg sc once at Day 1, placebo sc at Days 29, 57, and 85 plus daily placebo capsules for 16 weeks. Allopurinol treatment was initiated at the latest at baseline (Visit 2) according to the patient's renal function / estimated creatinine clearance at screening (Visit 1). Allopurinol was administered orally to all randomized patients once daily (100 mg-300 mg) for 24 weeks. arm 4: Canakinumab 100 mg sc once at Day 1, placebo sc at Days 29, 57, and 85 plus daily placebo capsules for 16 weeks. Allopurinol treatment was initiated at the latest at baseline (Visit 2) according to the patient's renal function / estimated creatinine clearance at screening (Visit 1). Allopurinol was administered orally to all randomized patients once daily (100 mg-300 mg) for 24 weeks. arm 5: Canakinumab 300 mg sc once at Day 1, placebo sc at Days 29, 57, and 85 plus daily placebo capsules for 16 weeks. Allopurinol treatment was initiated at the latest at baseline (Visit 2) according to the patient's renal function / estimated creatinine clearance at screening (Visit 1). Allopurinol was administered orally to all randomized patients once daily (100 mg-300 mg) for 24 weeks. arm 6: Canakinumab 50 mg sc at Days 1, and 29 followed by canakinumab 25 mg sc on Days 57, and 85 plus daily placebo capsules for 16 weeks, repeated every 4 week (q4wk). Allopurinol treatment was initiated at the latest at baseline (Visit 2) according to the patient's renal function / estimated creatinine clearance at screening (Visit 1). Allopurinol was administered orally to all randomized patients once daily (100 mg-300 mg) for 24 weeks. arm 7: Colchicine 0.5 mg capsule orally once daily throughout the whole treatment phase of 16 weeks plus placebo matching canakinumab s.c. at Days 1, 29, 57, and 85. Allopurinol treatment was initiated at the latest at baseline (Visit 2) according to the patient's renal function / estimated creatinine clearance at screening (Visit 1). Allopurinol was administered orally to all randomized patients once daily (100 mg-300 mg) for 24 weeks. arm 8: Participants who were randomized to canakinumab in the core study and were treated with canakinumab for at least 1 flare in the extension study. arm 9: Patients who were randomized to canakinumab in the core study but did not receive treatment with canakinumab in the extension study. arm 10: Patients who were randomized to colchicine in the core study and were treated with canakinumab for at least 1 flare in the extension study. arm 11: Patients who were randomized to colchicine in the core study but did not receive treatment with canakinumab in the extension study.

Interventions: intervention 1: Canakinumab intervention 2: Colchicine intervention 3: Allopurinol intervention 4: Placebo Matching Canakinumab intervention 5: Placebo Matching Colchicine
Intervention descriptions: intervention 1: Canakinumab was supplied in glass vials as a lyophilized powder. intervention 2: 0.5 mg capsule orally once daily for 16 weeks. intervention 3: 100-300 mg orally once daily for 24 weeks. intervention 4: Subcutaneous injection. intervention 5: Capsule orally once daily for 16 weeks.

Protocol document: