Conditions: Acute Gout
Keywords: Frequent flares Gout Anti-interleukin-1β monoclonal antibody
Allocation: RANDOMIZED | Intervention model: PARALLEL
Enrollment: 226
Healthy volunteers: no

Brief summary:
The purpose of this study was to demonstrate that canakinumab given upon acute gout flares relieves the signs and symptoms and prevents recurrence of gout flares in patients with frequent flares of gout for whom non-steroidal anti-inflammatory drugs (NSAIDs) and/ or colchicine are contraindicated, not tolerated, or ineffective. The efficacy of canakinumab was compared to the corticosteroid triamcinolone acetonide.

The purpose of the first 12 week extension study was to collect additional safety, tolerability and efficacy data in patients who have completed the core study CACZ885H2357.

The purpose of the second one year open-label extension study was to confirm the long-term safety and tolerability of canakinumab in patients who had completed the first extension study.

Detailed description:

Arms:
arm 1: Participants received 1 subcutaneous (sc) injection of canakinumab 150 mg and 1 intramuscular (im) injection of placebo to triamcinolone acetonide on Day 1. Participants could receive a re-dose of study drug on demand upon the occurrence of new flares, but re-dosing could not occur until 14 days had elapsed after the previous dose. Participants completing the 12 week core study could continue to be treated in a 12 week extension study for any new gout flare on demand with the same treatment as assigned in the core study.

In the second extension study participants were to receive open-label on demand treatment with canakinumab 150 mg sc upon new flare for 1 year, for a total duration of 18 months. arm 2: Participants received 1 intramuscular (im) injection of triamcinolone acetonide 40 mg and 1 subcutaneous (sc) injection of placebo to canakinumab on Day 1. Participants could receive a re-dose of study drug on demand upon the occurrence of new flares, but re-dosing could not occur until 14 days had elapsed after the previous dose. Participants completing the 12 week core study could continue to be treated in a 12 week extension study for any new gout flare on demand with the same treatment as assigned in the core study.

In the second extension study participants were to switch to open-label on demand treatment with canakinumab 150 mg sc upon new flare for 1 year. Triamcinolone acetonide was not to be administered in the second extension study.

Interventions: intervention 1: Canakinumab 150 mg intervention 2: Triamcinolone acetonide 40 mg intervention 3: Placebo to canakinumab intervention 4: Placebo to triamcinolone acetonide
Intervention descriptions: intervention 1: Canakinumab 150 mg was supplied in 6 mL glass vials each containing nominally 150 mg canakinumab (plus 20% overfill). intervention 2: Triamcinolone acetonide 40 mg was supplied as a suspension. intervention 3: Placebo to canakinumab was supplied in 6 mL glass vials containing placebo powder as a lyophilized cake. intervention 4: Placebo triamcinolone acetonide was supplied as a lipid emulsion similar in appearance to triamcinolone acetonide.

Protocol document: