Journal
CURRENT OPINION IN RHEUMATOLOGY
Volume 28, Issue 1, Pages 76-82Publisher
LIPPINCOTT WILLIAMS & WILKINS
DOI: 10.1097/BOR.0000000000000238
Keywords
anticitrullinated protein antibodies; lungs; rheumatoid arthritis; rheumatoid factor
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Funding
- Swedish Foundation for Strategic Research
- Innovative Medicine Initiative BTCure [115142-2]
- FP7-HEALTH-INNOVATION-1 Euro-TEAM [305549-2]
- Initial Training Networks 7th framework program Osteoimmune [289150]
- Swedish Research Council
- Stockholm County Council
- Karolinska Institutet
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Purpose of reviewRecent discoveries implicate the lungs as a possible extra-articular mucosal site for initiating rheumatoid arthritis-associated immunity.Recent findingsIndividuals at risk for developing arthritis and patients with early untreated rheumatoid arthritis show signs of lung involvement on high-resolution computer tomography. Rheumatoid arthritis-associated antibodies are present in patients with respiratory complains such as bronchiectasis and unexplained dyspnea even in the absence of joint disease and might predict future development of rheumatoid arthritis in these patients. Rheumatoid arthritis-associated antibodies are detected in the sputum of individuals at risk for developing rheumatoid arthritis but not yet having disease. Signs of bronchial mucosal inflammation with germinal center formation and local production of antibodies have been described in patients with early untreated rheumatoid arthritis. Shared antigenic targets have been identified and characterized in the lungs and joints of rheumatoid arthritis patients.SummaryRecent findings support an important role for the lung as a mucosal extra-articular place were inflammation induced by external triggers (such as smoking) leads to tolerance break and generation of rheumatoid arthritis-specific immunity already before disease onset with only secondary targeting of the joints.
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