期刊
ANNALS OF THE RHEUMATIC DISEASES
卷 60, 期 1, 页码 67-68出版社
B M J PUBLISHING GROUP
DOI: 10.1136/ard.60.1.67
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Objectives-Systemic lupus erythematosus (SLE) and rheumatoid arthritis (RA) can both present with an erosive arthritis with the small joints of the hands affected. Therefore a serological marker would be useful to distinguish between these two diseases at onset. In this study anti-RA33 antibodies, which are found in patients with SLE and RA, and anti-citrullinated peptide antibodies (anti-CCP), which have recently been described as highly specific for RA, were assessed. Methods-Two hundred and thirty one patients receiving long term follow up for SLE were evaluated for arthritis and classified as erosive and non-erosive disease. Sixty six patients were tested for anti-RA33 and anti-CCP antibodies. All the patients were tested for rheumatoid factor (RF) and HLA-DR4 status. Results-Ten patients had erosive disease, six of whom were RF positive (60%), and six anti-RA33 positive (60%),whereas only two were anti-CCP positive (20%). Two hundred and twenty one patients had nonerosive disease, 40 of whom were RF positive (18%), 14 were anti-RA33 positive (6%), whereas only one patient was found to be anti-CCP positive (0.5%). Conclusion-The presence of anti-CCP antibodies may be useful in distinguishing RA from erosive SLE. Anti-RA33 antibodies and RF are unhelpful.
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