Multicenter, Open-Label, Long-term Extension to Describe the Safety of Tocilizumab in Patients with Early, Moderate to Severe Rheumatoid Arthritis

Abstract

Introduction: Biologic DMARDs (Disease Modifying Anti Rheumatic Drugs) have shown to be effective in the treatment of rheumatoid arthritis (RA) resistant to the use of synthetic DMARDs. The primary goal of this study was to assess the long-term safety of the use of tocilizumab in patients with early rheumatoid arthritis, moderate to severe disease activity. The secondary goal was to assess the efficiency of tocilizumab in achieving and maintaining clinical remission of the disease. Methods: ML28133 is a long-term, extended study of 13 patients with rheumatoid arthritis treated with tocilizumab. Two patients were male (15.4%), 11 (84.61%) female. The average age of patients was 53.27+/-10.68. Patients received 8 mg/kg tocilizumab i.v. every four weeks, 104 weeks overall. Safety was assessed following side effects, blood tests, physical examination and vital signs. Efficiency was assessed by achieving and maintaining clinical remission according to DAS28 (Disease Activity Score 28), global assessment of disease activity, VAS score and HAQ-DI (Health Activity Score) questionnaire. Results: Incidence of side effects was 76.92%. Infections were of special interest and were most common (15.3%). Four patients had serious adverse events, three of which associated with tocilizumab, and therapy was stopped. In 11 (84.6%) of the 13 treated patients clinical remission was achieved at times. At the end of the study, 8 out of 9 patients were in remission. Conclusion: The results have shown significant therapeutic effect of tocilizumab even in the most severe forms of the disease, which gives hope for its use as a monotherapy.