QJM. 2010 Mar;103(3):139-46. Epub 2009 Nov 19.

Autoantibodies in rheumatoid arthritis: rheumatoid factors and anticitrullinated protein antibodies.

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Division of Rheumatology, Department of Internal Medicine, Medical Research Center, Seoul National University, Seoul, Korea. ysong@snu.ac.kr

Abstract

Rheumatoid arthritis (RA) is a systemic inflammatory autoimmune disease, characterized by chronic, erosive polyarthritis and by the presence of various autoantibodies in serum and synovial fluid. Since rheumatoid factor (RF) was first described, a number of other autoantibodies have been discovered in RA patients. The autoantigens recognized by these autoantibodies include cartilage components, chaperones, enzymes, nuclear proteins and citrullinated proteins. However, the clinical significances and pathogenic roles of these antibodies are largely unknown except for RF and anticitrullinated protein antibodies (ACPAs), whose clinical usefulness has been acknowledged due to their acceptable sensitivities and specificities, and prognostic values. This review presents and discusses the current state of the art regarding RF and ACPA in RA.

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