Abstract:
:The expressions of some terminal glycotopes of synovial immunoglobulins G, A, and M were analysed in relation to rheumatoid arthritis (RA) progression defined according to early and advanced radiological changes in patients' hands. The relative amounts of terminal monosaccharides were determined by lectin-immunoblotting of immunoglobulin preparations using appropriate lectins able to recognize alpha2,6-linked (Sambucus nigra agglutinin) and alpha2,3-linked (Maackia amurensis agglutinin) sialic acid, galactose (Ricinus communis agglutinin I), N-acetylglucosamine (Griffonia simplicifolia agglutinin II) as well as alpha1,6-linked (Aleuria aurantia lectin), alpha1,3-linked (Lotus tetragonolobus agglutinin), and alpha1,2-linked (Ulex europaeus agglutinin) fucose. The results indicate differences between early and advanced RA stages in the terminal sugar exposition of synovial IgG and IgA, but not IgM. The galactose-deficient glycotope with exposed N-acetylglucosamine of the synovial 33.1-kDa IgG fragment appeared exclusively in the early stage of RA. In contrast, this glycotope of intact synovial IgG and IgA was present in both groups, although with higher proportions in advanced RA. The proportions of the sialyl and fucosyl determinants of intact synovial A and G immunoglobulins were clearly lower in the early RA group than in the advanced. The analysis of terminal oligosaccharide exposition in IgG, IgG fragments, and IgA present in the synovial fluid of RA patients might be applicable as a stage-specific marker in the diagnosis and therapy of RA patients.
journal_name
Rheumatol Intjournal_title
Rheumatology internationalauthors
Kratz EM,Borysewicz K,Katnik-Prastowska Idoi
10.1007/s00296-009-1139-5subject
Has Abstractpub_date
2010-08-01 00:00:00pages
1285-92issue
10eissn
0172-8172issn
1437-160Xjournal_volume
30pub_type
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