Open-label trial of anti-TNF-α in dermato- and polymyositis treated concomitantly with methotrexate

Background/Aims: To determine the efficacy of infliximab combined with weekly methotrexate in drug-naive recent-onset dermatomyositis and polymyositis. Methods: A multi-centre open-label controlled trial was conducted. Disease activity was assessed using patient's and physician's disease activity assessment, manual muscle testing (MMT), hand-held dynamometry, and serum CK. The primary objective was to assess the efficacy using MMT after a period of 26 weeks. Results: The study was terminated prematurely because of a low inclusion rate and a high drop-out rate due to disease progression and the occurrence of an infusion reaction. The few patients who did reach the primary endpoint showed improvement in all aspects studied. Conclusion: Infliximab combined with weekly methotrexate might be safe and well tolerated in a small subgroup of patients with drug-naive recent-onset myositis. At present, we do not advocate the use of this treatment because treatment response cannot be predicted beforehand. Copyright (C) 2008 S. Karger AG, Basel.