Are there autoantibodies reacting against citrullinated peptides derived from type I and type II collagens in patients with rheumatoid arthritis?. Issue 10 (14th September 2005)

• Record Type: Journal Article
• Authors: Koivula, M-K; Åman, S; Karjalainen, A; Hakala, M; Risteli, J
• Is Part Of: Annals of the rheumatic diseases. Volume 64:Issue 10(2005)
• Page Start: 1443
• Page End: 1450
• Publication Date: 2005-09-14
• Subjects: CCP, cyclic citrullinated peptide -- EIA, enzyme immunoassay -- ELISA, enzyme linked immunosorbent assay -- PADI, peptidylarginine deiminase -- RA, rheumatoid arthritis; autoantibodies -- citrullinated peptides -- collagens -- rheumatoid arthritis; Rheumatism -- Periodicals; 616.723005
• DOI: 10.1136/ard.2004.031211
• Languages: English
• ISSNs: 0003-4967

Abstract

Abstract : Objectives: To assess the possible presence in patients with rheumatoid arthritis (RA) of autoantibodies recognising citrullinated peptides derived from type I and II collagens. Methods: Firstly, the binding of four pairs of synthetic peptides (arginine-containing and artificially citrullinated forms) related to different regions of human type II collagen were tested with sera from 120 patients with RA and 81 controls. Secondly, two similar pairs of peptides related to the carboxy terminal telopeptides of the α1 and α2 chains of human type I collagen were tested. Results: 42–53% of the RA sera showed increased binding of arginine peptides related to type II collagen. However, 12 RA sera bound the citrullinated form of the α1(II) telopeptide more strongly than the corresponding arginine peptide. 20 RA sera bound the citrullinated carboxytelopeptide from the α1 chain of type I collagen (α1(I) telopeptide) more strongly than the respective arginine peptide. The correlation between the autoantibodies to type I and II collagen telopeptides was rs = 0.576, p<0.001. Anti-cyclic citrullinated peptide (anti-CCP) assay was positive in 71/120 (59%) patients with RA. An anti-CCP assay detects a different subgroup of antibodies than anti-telopeptide assays. However, both anti-telopeptide and anti-CCP antibodies were increased in patients with RA. Conclusion: Some patients with RA were identified whose sera contained antibodies that specifically bound citrullinated peptides related to the carboxy terminal telopeptides of the α1 and α2 chains of type I collagen and the α1 chains of type II collagen (sequences YYXA, FYXA, and YMXA, where X stands for citrulline).