Conditions: Rheumatoid Arthritis
Allocation: RANDOMIZED | Intervention model: PARALLEL
Enrollment: 243
Healthy volunteers: no

Brief summary:
Primary Objective:

-To demonstrate that sarilumab added to methotrexate (MTX) reduce signs and symptoms of rheumatoid arthritis (RA) in Japanese RA participants with an inadequate response to MTX.

Secondary Objective:

-To assess the safety of sarilumab added to MTX in Japanese RA participants with an inadequate response to MTX.

Detailed description:
The total duration of study was expected up to 62 weeks (screening period of 4 weeks, treatment period of 52 weeks, and a 6-week post treatment observation).

Arms:
arm 1: Sarilumab 150 mg subcutaneous (SC) injection once every 2 weeks (q2w) in combination with MTX and folic acid in double-blind period up to Week 24 followed by single-blind period in which participants continued with the same treatment up to Week 52. Participants with inadequate response (defined as less than 20% improvement from baseline on 2 consecutive visits \[at least 4 weeks apart\] in either tender joint count \[TJC\] or swollen joint count \[SJC\], or with any other clear lack of efficacy based on investigator's judgment) by Week 16, were rescued with open label sarilumab 200 mg q2w treatment. arm 2: Sarilumab 200 mg SC injection q2w in combination with MTX and folic acid in double-blind period up to Week 24 followed by single-blind period in which participants continued with the same treatment up to Week 52. Participants with inadequate response (defined as less than 20% improvement from baseline on 2 consecutive visits \[at least 4 weeks apart\] in either TJC or SJC, or with any other clear lack of efficacy based on investigator's judgment) by Week 16, were rescued with open label sarilumab 200 mg q2w treatment. arm 3: Placebo (for sarilumab) SC injection q2w in combination with MTX and folic acid in double-blind period up to Week 24 followed by a single-blind period in which participants were switched and received sarilumab 150 mg SC injection q2w in combination with MTX and folic acid up to Week 52. Participants with inadequate response (defined as less than 20% improvement from baseline on 2 consecutive visits \[at least 4 weeks apart\] in either TJC or SJC, or with any other clear lack of efficacy based on Investigator's judgment) by Week 16, were rescued with open label sarilumab 200 mg q2w treatment. arm 4: Placebo (for sarilumab) SC injection q2w in combination with MTX and folic acid in double-blind period up to Week 24 followed by a single-blind period in which participants were switched and received sarilumab 200 mg SC injection q2w in combination with MTX and folic acid up to Week 52. Participants with inadequate response (defined as less than 20% improvement from baseline on 2 consecutive visits \[at least 4 weeks apart\] in either TJC or SJC, or with any other clear lack of efficacy based on Investigator's judgment) by Week 16, were rescued with open label sarilumab 200 mg q2w treatment.

Interventions: intervention 1: Sarilumab SAR153191 (REGN88) intervention 2: Placebo (for sarilumab) intervention 3: Methotrexate intervention 4: Folic acid
Intervention descriptions: intervention 1: Pharmaceutical form: solution for injection Route of administration: subcutaneous intervention 2: Pharmaceutical form: solution for injection Route of administration: subcutaneous intervention 3: Dispensed according to local practice. intervention 4: Dispensed according to local practice.

Protocol document: