A Study to Evaluate the Safety and Efficacy of SM03 in Patients With Rheumatoid Arthritis Receiving Methotrexate

A Randomized,Placebo Controlled, Double-blind, Parallel Group, Phase II Study to Evaluate the Efficacy and Safety of SM03, Compared to Placebo, in Patients With Moderate-to-Severe Active Rheumatoid Arthritis Receiving Methotrexate

This study evaluated the safety and efficacy of SM03 compared to placebo in patients with active rheumatoid arthritis(RA) receiving methotrexate

Inclusion Criteria:

• Adult patients 18-75 years of age.
• Rheumatoid arthritis (RA) for ≥ 12 months, diagnosed according to the revised 1987 American College of Rheumatology (ACR) criteria for the classification of rheumatoid arthritis.
• Moderate to severe active RA with swollen joint count (SJC) ≥ 8 (66 joint count), and tender joint count (TJC) ≥ 8 (68 joint count) at screening and baseline.
• At screening, either C-reactive protein (CRP) ≥ 0.6 mg/dL (6 mg/L), or Erythrocyte sedimentation rate (ESR) ≥ 28 mm/hour, or Morning stiffness of joint for ≥ 45 minutes
• Inadequate response to methotrexate, having received and tolerated at a dose of 7.5-20 mg/week for ≥ 12 weeks, at a stable dose over the past 4 weeks.

Exclusion Criteria:

• Rheumatic autoimmune disease other than RA.
• Use of any biological DMARDs for RA within past 6 months.
• Concurrent treatment with any Disease Modifying Anti-Rheumatic Drug (DMARD) other than methotrexate
• Active infection, or history of serious or chronic infection