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Sökning: swepub > Umeå universitet > Stenlund Hans > (2000-2004) > Van Venrooij Walther J

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1.
  • Berglin, Ewa, MD, PhD, 1955-, et al. (författare)
  • A combination of autoantibodies to cyclic citrullinated peptide (CCP) and HLA-DRB1 locus antigens is strongly associated with future onset of rheumatoid arthritis
  • 2004
  • Ingår i: Arthritis Research & Therapy. - : BioMed Central. - 1478-6354 .- 1478-6362 .- 1465-9905. ; 6:4, s. R303-R308
  • Tidskriftsartikel (refereegranskat)abstract
    • Antibodies against cyclic citrullinated peptide (CCP) and rheumatoid factors (RFs) have been demonstrated to predate the onset of rheumatoid arthritis (RA) by years. A nested case–control study was performed within the Northern Sweden Health and Disease study cohort to analyse the presence of shared epitope (SE) genes, defined as HLA-DRB1*0404 or DRB1*0401, and of anti-CCP antibodies and RFs in individuals who subsequently developed RA. Patients with RA were identified from among blood donors whose samples had been collected years before the onset of symptoms. Controls matched for age, sex, and date of sampling were selected randomly from the same cohort. The SE genes were identified by polymerase chain reaction sequence-specific primers. Anti-CCP2 antibodies and RFs were determined using enzyme immunoassays. Fifty-nine individuals with RA were identified as blood donors, with a median antedating time of 2.0 years (interquartile range 0.9–3.9 years) before presenting with symptoms of RA. The sensitivity for SE as a diagnostic indicator for RA was 60% and the specificity was 64%. The corresponding figures for anti-CCP antibodies were 37% and 98%, and for RFs, 17–42% and 94%, respectively. In a logistic regression analysis, SE (odds ratio [OR] = 2.35), anti-CCP antibodies (OR = 15.9), and IgA-RF (OR = 6.8) significantly predicted RA. In a combination model analysis, anti-CCP antibodies combined with SE had the highest OR (66.8, 95% confidence interval 8.3–539.4) in predicting RA, compared with anti-CCP antibodies without SE (OR = 25.01, 95% confidence interval 2.8–222.2) or SE without anti-CCP antibodies (OR = 1.9, 95% confidence interval 0.9–4.2). This study showed that the presence of anti-CCP antibodies together with SE gene carriage is associated with a very high relative risk for future development of RA.
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2.
  • Rantapää-Dahlqvist, Solbritt, et al. (författare)
  • Antibodies against cyclic citrullinated peptide and IgA rheumatoid factor predict the development of rheumatoid arthritis
  • 2003
  • Ingår i: Arthritis and Rheumatism. - : Wiley-Blackwell. - 0004-3591 .- 1529-0131. ; 48:10, s. 2741-2749
  • Tidskriftsartikel (refereegranskat)abstract
    • Methods: A case–control study was nested within the Northern Sweden Health and Disease Study and the Maternity cohorts of Northern Sweden. Patients with RA were identified among blood donors whose samples had been taken years before the onset of symptoms. Control subjects matched for age, sex, date of sampling, and residential area were selected randomly from the same cohorts. Anti‐CCP antibody and RFs were determined using enzyme immunoassays.Results: Eighty‐three individuals with RA were identified as having donated blood before presenting with any symptoms of joint disease (median 2.5 years [interquartile range 1.1–4.7] before RA). In samples obtained before the onset of RA, the prevalence of autoantibodies was 33.7% for anti‐CCP, 16.9% for IgG‐RF, 19.3% for IgM‐RF, and 33.7% for IgA‐RF (all highly significant compared with controls). The sensitivities for detecting these autoantibodies >1.5 years and ≤1.5 years before the appearance of any RA symptoms were 25% and 52% for anti‐CCP, 15% and 30% for IgM‐RF, 12% and 27% for IgG‐RF, and 29% and 39% for IgA‐RF. In conditional logistic regression models, anti‐CCP antibody and IgA‐RF were found to be significant predictors of RA.Conclusion: Anti‐CCP antibody and RFs of all isotypes predated the onset of RA by several years. The presence of anti‐CCP and IgA‐RF predicted the development of RA, with anti‐CCP antibody having the highest predictive value. This indicates that citrullination and the production of anti‐CCP and RF autoantibodies are early processes in RA.
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