Gene Expression Profiling in PBMCs as a Tool for Prediction of Anakinra Responsiveness in Rheumatoid Arthritis

Inclusion Criteria: * Is age 18 years old or older Satisfies the 1987 American College of Rheumatology revised criteria for Rheumatoid arthritis Has active disease at the time of randomization as indicated by a DAS28\> 5.1 Has a disease at least refractory to DMARDs whose methotrexate or leflunomide Is capable of understanding and signing an informed consent form Agrees to use a medically accepted form of contraception during the study Exclusion Criteria: * Is pregnant or breast-feeding or without contraception Has significant concurrent medical diseases including cancer or a history of cancer within 5 years of entering the study, uncompensated congestive heart failure, significant active infection or any underlying diseases that could predispose subjects to infections (whose tuberculosis) Has renal disease (creatinin clearance level \< 30 ml/min) Has allergy to anakinra Has leukopenia (white blood cells \< 1.5 x 109 /l