A Study to Evaluate the Efficacy,Safety,Tolerability,Pharmacokinetics,and Immunogenicty of Plonmarlimab in Subjects With Acute Gouty Arthritis

Inclusion Criteria: * Subjects aged ≥18 years, regardless of gender. * Subjects are willing to participate in this study and voluntarily sign the informed consent form. * Meet the 2015 American College of Rheumatology (ACR)/European League Against Rheumatism (EULAR) gout classification criteria. * Experienced ≥3 episodes of acute gout flare within the 12 months prior to baseline (determination of an acute gout flare based on patient history, referral records, etc., will be made by the investigator). * Subjects have experienced an acute gout flare within 5 days prior to administration of the investigational product (determination of an acute gout flare based on patient history, referral records, etc., will be made by the investigator). * Contraindicated, intolerant, or inadequately responsive to colchicine and/or non-steroidal anti-inflammatory drugs (NSAIDs) (determination based on patient history, referral records, etc., will be made by the investigator). * Baseline pain intensity assessment in the most severely affected joint by the subject using a 0-100 mm Visual Analogue Scale (VAS) is ≥50 mm. * Subjects may or may not be receiving urate-lowering therapy. If planning to continue urate-lowering therapy during the study, it must have been at a stable dose for ≥2 weeks prior to baseline. * Subjects (including their partners) have no pregnancy plans from the screening period until 90 days after dosing and voluntarily agree to use effective contraception. Exclusion Criteria:…