A Phase Ib/II Study of Recombinant Anti-IL-1β Humanized Monoclonal Antibody Injection in Chinese Participants With Acute Gout

A Phase Ib/II Study to Evaluate the Safety, Tolerability, Pharmacokinetics and Efficacy of Recombinant Anti-IL-1β Humanized Monoclonal Antibody Injection in Chinese Participants With Acute Gout

The purpose of this study is to determine the target dose of phase II and to evaluate the safety, tolerability, pharmacokinetics and efficacy of recombinant anti-IL-1β humanized monoclonal antibody injection at different doses in Chinese participants with acute gout.

The phase Ib study is a multi-center, open label, dose escalation study examining the effect of recombinant anti-IL-1β humanized monoclonal antibody injection and to determine the target dose of phase II for the treatment of acute flare in Chinese gout patients in whom non-steroidal anti-inflammatory drugs (NSAIDs) and/or colchicine are contraindicated, are not tolerated, or do not provide an adequate response. There are 3 dose groups (100 mg、200 mg and 300 mg) in phase Ib and 10 participants in each group.

The phase II study is a dose-ranging, multi-center, randomized, double-blind, double-dummy, active-controlled, parallel-group study examining the effect of 2 dose regimens (200 mg and 300 mg, based on the outcome of phase Ib) of recombinant anti-IL-1β humanized monoclonal antibody injection versus compound betamethasone injection for the treatment of acute flare in Chinese gout patients in whom NSAIDs and/or colchicine are contraindicated, are not tolerated, or do not provide an adequate response. The phase II recommended dose of SSGJ-613 in subjects with acute gouty was determined according to the phase Ib interim analysis results.

Inclusion Criteria:

• Must be 18 Years to 65 Years, both male and female
• Meeting the American College of Rheumatology (ACR) 2015 criteria for the classification of acute arthritis of primary gout.
• Presence of acute gout flare for no longer than 7 days
• Baseline pain intensity > or = to 50 mm on the 0-100 mm VAS
• Contraindicated for, intolerant or unresponsive to NSAIDs, colchicine or both

Exclusion Criteria:

• Secondary gout (such as gout caused by chemotherapy, transplant gout, etc.)
• Evidence/suspicion of infectious/septic arthritis, or other acute inflammatory arthritis
• Presence of severe renal function impairment
• Intolerance of subcutaneous and intramuscular injection
• Known presence or suspicion of active or recurrent bacterial, fungal or viral infection at the time of enrollment
• History of malignant tumor within 5 years before screening
• Live vaccinations within 3 months prior to the start of the study
• Use of forbidden therapy