Study of Two Doses of ABX464 in Participants With Moderate to Severe Rheumatoid Arthritis

Inclusion Criteria

• Patient with a confirmed and documented diagnosis of adult-onset rheumatoid arthritis, for at least 12 weeks, according to the revised 2010 American College of Rheumatology- European League Against Rheumatism (ACR-EULAR) classification criteria, including at least one positive criteria among the following: Rheumatoid Factor (RF), Anti-Citrullinated Peptide Antibody (ACPA) or bone erosion;
• Swollen joint count (SJC) of ≥ 4 (28-joint count) and tender joint count (TJC) ≥4 (28-joint count) at screening;
• Patient with a moderate to severe disease activity score Disease Activity Score (28 joints) C-Reactive Protein [DAS28 CRP] ≥ 3.2 and C-reactive Protein (CRP) ≥ 5 mg/L (≥ 4.76 nmol)/L) at screening;
• Patient who had an inadequate response (IR), or failed either methotrexate (MTX) or/and anti- Tumor Necrosis Factor alpha (TNFα) therapy (both administered for at least 12 weeks before IR) or were intolerant to anti- TNFα therapy.

Exclusion Criteria

• Patient with a known positive anti-double stranded deoxyribonucleic acid (DNA [anti-dsDNA]) and confirmed diagnosis of systemic lupus erythematosus (SLE);
• Patient with known active infections at screening such as CytoMegaloVirus (CMV), herpes virus and/or recent infectious hospitalization;
• Acute, chronic or history of clinically relevant pulmonary, cardiovascular, hepatic, pancreatic or renal functional abnormality, encephalopathy, neuropathy or unstable Central Nervous System (CNS) pathology such as seizure disorder, angina or cardiac arrhythmias, active malignancy or any other clinically significant medical problems as determined by physical examination and/or laboratory screening tests and/or medical history;
• Acute, chronic or history of immunodeficiency or other autoimmune disease;
• Patient previously treated with any non-anti-TNF biological Disease-Modifying AntiRheumatic Drugs (bDMARDs), and targeted DMARDs (tDMARDS) prior to baseline.