Abstract
Background: Rituximab (RTX), an anti-CD 20 monoclonal antibody is one of the first line biological disease-modifying anti-rheumatoid drug indicated for the treatment of rheumatoid arthritis (RA) in patient's refractory to conventional Synthetic DMARDs (csDMARDs). Limited data are available about the safety and efficacy of biosimilar version of this molecule. In this study, we assessed the clinical efficacy and safety profile of biosimilar RTX, RedituxTM. Methods: In this prospective study, 36 adults with moderate disease activity measured by the European League Against Rheumatism (EULAR) disease activity score (DAS28-erythrocyte sedimentation rate [ESR] ≥3.2), who had failed conventional therapy with at least 2 csDMARDs were initiated on RTX, 1000 mg, given on day 0 and day 15, after taking informed consent. Biomarkers including ESR, C reactive protein, Immunoglobulin G and M (IgG, IgM) and DAS28-ESR scores were measured at baseline and repeated at 2, 4, 8, 12, 16, 20, and 24 weeks. The primary endpoint was attaining EULAR good/moderate response. Results: DAS28-ESR score showed a statistically significant decline at 24 weeks (P Conclusions: RTX is a safe and effective drug for the management of seropositive RA with results comparable with the original molecule. No serious adverse effects were noted in the study except for mild infusion reactions and fall in immunoglobulin levels.
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