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[Antibodies to citrullinated proteins in rheumatoid arthritis].

[Article in Japanese]

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  • 1Department of Rheumatology, Sagamihara National Hospital, National Hospital Organization.


Rheumatoid arthritis (RA) is a systemic autoimmune disease of unknown etiology, characterized by chronic joint inflammation that often leads to joint destruction. Diagnosis of RA is currently based on the revised classification criteria of the American College of Rheumatology (ACR); however, it remains imprecise, especially early in the course of disease. Rheumatoid factor (RF) has been widely used in clinical practice as a useful serological marker for diagnosis of RA. Although RF is the only serological test in the criteria of the ACR, its specificity is limited since RF can be also detected in other rheumatic diseases. Because the current therapeutic strategies in RA employ increasingly aggressive regimens from early stage of the disease, more specific serological markers than RF are desirable. Recently, anti-cyclic citrullinated peptide (anti-CCP) antibodies have attracted attention as a useful marker for the diagnosis of RA with high specificity. In addition to the diagnostic properties, anti-CCP antibodies showed to be a good prognostic marker for joint destructions. In this review, we will explain about the clinical usefulness of anti-CCP antibodies for the daily practice of RA.

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