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Strandberg, Gunnar
Publications (3 of 3) Show all publications
Söderlin, M., Kastbom, A., Kautiainen, H., Leirisalo-Repo, M., Strandberg, G. & Skogh, T. (2004). Antibodies against cyclic citrullinated peptide (CCP) and levels of cartilage oligomeric matrix protein (COMP) in very early arthritis: relation to diagnosis and disease activity. Scandinavian Journal of Rheumatology, 33(3), 185-188
Open this publication in new window or tab >>Antibodies against cyclic citrullinated peptide (CCP) and levels of cartilage oligomeric matrix protein (COMP) in very early arthritis: relation to diagnosis and disease activity
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2004 (English)In: Scandinavian Journal of Rheumatology, ISSN 0300-9742, Vol. 33, no 3, p. 185-188Article in journal (Refereed) Published
Abstract [en]

Objective: To measure serum levels of antibodies against cyclic citrullinated peptide (anti-CCP antibodies) and serum cartilage oligomeric matrix protein (COMP) in patients with early joint inflammation, and to study the correlation of these two tests with clinical measurements.

Methods: Adult patients with recent-onset arthritis, of <3 months' duration, were referred from primary healthcare centres to rheumatologists. Serum levels of anti-CCP antibodies and COMP at baseline were analysed by enzyme immunoassay (EIA) and compared with clinical baseline data.

Results: Sixty-nine patients were included. The specificity of the anti-CCP antibody test for RA was 96%, and the sensitivity was 44%. There was a significant difference between the four diagnosis groups in the anti-CCP antibody test, probability (p)<0.001, whereas no significant differences were found concerning COMP. The baseline serum COMP test correlated with age (p=0.0001), joint score for swollen joints (p=0.02), and C-reactive protein (CRP) (p=0.02).

Conclusion: This study confirms the high diagnostic specificity of anti-CCP antibodies for rheumatoid arthritis (RA) in a prospective population-based study of very early arthritis. Raised serum COMP levels were common in all diagnosis groups in this series, indicating cartilage involvement in both self-limiting and non-erosive disease.

Keywords
anti-CCP antibodies, COMP, rheumatoid arthritis
National Category
Medical and Health Sciences
Identifiers
urn:nbn:se:liu:diva-14376 (URN)10.1080/03009740310004856 (DOI)
Available from: 2007-04-20 Created: 2007-04-20 Last updated: 2015-08-31
Kastbom, A., Strandberg, G., Lindroos, A. & Skogh, T. (2004). Anti-CCP antibody test predicts the disease course during 3 years in early rheumatoid arthritis (the Swedish TIRA project). Annals of the Rheumatic Diseases, 63(9), 1085-1089
Open this publication in new window or tab >>Anti-CCP antibody test predicts the disease course during 3 years in early rheumatoid arthritis (the Swedish TIRA project)
2004 (English)In: Annals of the Rheumatic Diseases, ISSN 0003-4967, Vol. 63, no 9, p. 1085-1089Article in journal (Refereed) Published
Abstract [en]

Objectives: To evaluate the diagnostic sensitivity of antibodies to cyclic citrullinated peptide (CCP) in recent onset rheumatoid arthritis (RA) at diagnosis and 3 years later, and to evaluate anti-CCP antibody as a predictor of the disease course during 3 years.

Methods: 242 patients with recent onset (≤ 1 year) RA were followed up regularly during 3 years after inclusion in the Swedish multicentre study "TIRA" 1996-98. Anti-CCP antibodies were analysed by an enzyme immunoassay (EIA). Rheumatoid factors (RFs) were analysed by latex agglutination and two isotype-specific (IgM and IgA) EIAs. Disease activity was assessed by plasma CRP, ESR, 28 joint disease activity score, and the physician's global assessment of disease activity. Functional ability was evaluated by the Health Assessment Questionnaire.

Results: Overall, the diagnostic sensitivity of anti-CCP antibodies was 64% and the proportion of positive tests increased with the number of fulfilled classification criteria according to the American College of Rheumatology. The anti-CCP antibody results correlated with RF, but were better than RF as predictor of a more aggressive disease course. After 3 years 5/97 patients had changed anti-CCP status: 2 from negative to positive and 3 from positive to negative. The mean level of anti-CCP antibodies declined by 131 U/ml during the 3 year follow up (95% Cl 34 to 228 U/ml).

Conclusion: The anti-CCP antibody assay has a similar diagnostic sensitivity to that of RF in early RA, but is better as a predictor of the disease course over 3 years. Although the mean serum level declines, anti-CCP antibody positivity remains essentially unaltered 3 years after diagnosis and start of antirheumatic treatment.

Keywords
anti-CCP antibody, rheumatoid factor, early rheumatoid arthritis, inflammation, disease course
National Category
Medical and Health Sciences
Identifiers
urn:nbn:se:liu:diva-14377 (URN)10.1136/ard.2003.016808 (DOI)
Available from: 2007-04-20 Created: 2007-04-20 Last updated: 2015-08-31
Söderlin, M., Kastbom, A., Kautiainen, H., Leirisalo-Repo, M., Strandberg, G. & Skogh, T. (2003). Antibodies against cyclic citrullinated peptide (CCP) and cartilage oligomeric matrix protein (COMP) in relation to disease activity and erosions in a prospective population-based study of very early arthritis.. Arthritis and Rheumatism, 48(9)
Open this publication in new window or tab >>Antibodies against cyclic citrullinated peptide (CCP) and cartilage oligomeric matrix protein (COMP) in relation to disease activity and erosions in a prospective population-based study of very early arthritis.
Show others...
2003 (English)In: Arthritis and Rheumatism, ISSN 0004-3591, E-ISSN 1529-0131, Vol. 48, no 9, p. 194-Conference paper, Published paper (Other academic)
National Category
Medical and Health Sciences
Identifiers
urn:nbn:se:liu:diva-48476 (URN)
Available from: 2009-10-11 Created: 2009-10-11 Last updated: 2017-12-12
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