{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2024,4,28]],"date-time":"2024-04-28T11:53:31Z","timestamp":1714305211473},"reference-count":33,"publisher":"The Journal of Rheumatology","issue":"4","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["J Rheumatol"],"published-print":{"date-parts":[[2016,4]]},"abstract":"<jats:sec><jats:title>Objective.<\/jats:title><jats:p>It has been reported that organizing pneumonia (OP) develops when patients with rheumatoid arthritis (RA) are treated with biologic disease-modifying antirheumatic drugs (bDMARD). However, the clinical characteristics and pathophysiology of OP in RA remain unknown in patients treated with bDMARD. We investigated the clinical characteristics and cytokine profiles of patients with RA-OP treated with bDMARD or conventional synthetic DMARD (csDMARD).<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods.<\/jats:title><jats:p>Twenty-four patients with RA who had developed OP were enrolled. These patients included 12 treated with bDMARD (bDMARD-OP subset) and 12 treated with csDMARD (csDMARD-OP subset). We compared the clinical characteristics and cytokine profiles between the patients with OP (OP subset, n = 24) and non-OP patients (non-OP subset, n = 29).<\/jats:p><\/jats:sec><jats:sec><jats:title>Results.<\/jats:title><jats:p>There was no significant difference in clinical characteristics between the OP subset and the non-OP subset. Four patients developed OP within 2 months of bDMARD administration. In the other 8 patients, OP developed more than 1 year after the initiation of bDMARD. OP improved with corticosteroid treatment in all bDMARD-OP patients. After OP improved, bDMARD were readministered in 6 patients, and no OP recurrence was observed in any of these patients. Our multivariate analysis revealed that serum levels of interferon-\u03b1 (IFN-\u03b1), interleukin (IL)-1\u03b2, IL-6, IL-8, and interferon-\u03b3\u2013inducible protein 10 were significantly associated with the development of OP, although these cytokines tended to be lower in the bDMARD-OP subset than in the csDMARD-OP subset.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusion.<\/jats:title><jats:p>OP is unlikely to be fatal in patients treated with bDMARD or csDMARD. IFN-\u03b1 and proinflammatory cytokines are associated with the pathophysiology of OP in RA.<\/jats:p><\/jats:sec>","DOI":"10.3899\/jrheum.151019","type":"journal-article","created":{"date-parts":[[2016,2,2]],"date-time":"2016-02-02T03:15:27Z","timestamp":1454382927000},"page":"738-744","source":"Crossref","is-referenced-by-count":7,"title":["Clinical Characteristics and Cytokine Profiles of Organizing Pneumonia in Patients with Rheumatoid Arthritis Treated with or without 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