{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,5]],"date-time":"2026-10-05T21:58:46Z","timestamp":1791237526836,"version":"4.1.0"},"reference-count":55,"publisher":"Oxford University Press (OUP)","issue":"3","license":[{"start":{"date-parts":[[2017,6,13]],"date-time":"2017-06-13T00:00:00Z","timestamp":1497312000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/academic.oup.com\/journals\/pages\/open_access\/funder_policies\/chorus\/standard_publication_model"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2017,8,4]]},"abstract":"<jats:title>Summary<\/jats:title>\n               <jats:p>The goal of this study was to investigate the glycosylation profile of native immunoglobulin (Ig)G present in serum immune complexes in patients with rheumatoid arthritis (RA). To accomplish this, lectin binding assays, detecting the accessibility of glycans present on IgG-containing immune complexes by biotinylated lectins, were employed. Lectins capturing fucosyl residues (AAL), fucosylated tri-mannose N-glycan core sites (LCA), terminal sialic acid residues (SNA) and O-glycosidically linked galactose\/N-acetylgalactosamine (GalNac-L) were used. Patients with recent-onset RA at baseline and after 3-year follow-up were investigated. We found that native IgG was complexed significantly more often with IgM, C1q, C3c and C-reactive protein (CRP) in RA patients, suggesting alterations of the native structure of IgG. The total accessibility of fucose residues on captured immune complexes to the respective lectin was significantly higher in patients with RA. Moreover, fucose accessibility on IgG-containing immune complexes correlated positively with the levels of antibodies to cyclic citrullinated peptides (anti-CCP). We also observed a significantly higher accessibility to sialic acid residues and galactose\/GalNAc glyco-epitopes in native complexed IgG of patients with RA at baseline. While sialic acid accessibility increased during treatment, the accessibility of galactose\/GalNAc decreased. Hence, successful treatment of RA was associated with an increase in the SNA\/GalNAc-L ratio. Interestingly, the SNA\/GalNAc-L ratio in particular rises after glucocorticoid treatment. In summary, this study shows the exposure of glycans in native complexed IgG of patients with early RA, revealing particular glycosylation patterns and its changes following pharmaceutical treatment.<\/jats:p>","DOI":"10.1111\/cei.12987","type":"journal-article","created":{"date-parts":[[2017,5,16]],"date-time":"2017-05-16T10:02:59Z","timestamp":1494928979000},"page":"372-382","source":"Crossref","is-referenced-by-count":25,"title":["Altered glycan accessibility on native immunoglobulin G complexes in early rheumatoid arthritis and its changes during therapy"],"prefix":"10.1093","volume":"189","author":[{"given":"J","family":"St\u00fcmer","sequence":"first","affiliation":[{"name":"Friedrich-Alexander-University Erlangen-N\u00fcrnberg (FAU), Department of Internal Medicine 3, Rheumatology and Immunology, Universit\u00e4tsklinikum Erlangen, Erlangen, Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"M H C","family":"Biermann","sequence":"additional","affiliation":[{"name":"Friedrich-Alexander-University Erlangen-N\u00fcrnberg (FAU), Department of Internal Medicine 3, Rheumatology and Immunology, Universit\u00e4tsklinikum Erlangen, Erlangen, Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"J","family":"Knopf","sequence":"additional","affiliation":[{"name":"Friedrich-Alexander-University Erlangen-N\u00fcrnberg (FAU), Department of Internal Medicine 3, Rheumatology and Immunology, Universit\u00e4tsklinikum Erlangen, Erlangen, Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"I","family":"Magorivska","sequence":"additional","affiliation":[{"name":"Friedrich-Alexander-University Erlangen-N\u00fcrnberg (FAU), Department of Internal Medicine 3, Rheumatology and Immunology, Universit\u00e4tsklinikum Erlangen, Erlangen, Germany"},{"name":"Danylo Halytsky Lviv National Medical University, Lviv, Ukraine"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"A","family":"Kastbom","sequence":"additional","affiliation":[{"name":"Rheumatology\/Division of Neuro and Inflammation Sciences, Department of Clinical and Experimental Medicine, Link\u00f6ping University, Link\u00f6ping, Sweden"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"A","family":"Sv\u00e4rd","sequence":"additional","affiliation":[{"name":"Rheumatology Clinic, Falun Hospital, Falun, Sweden"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"C","family":"Janko","sequence":"additional","affiliation":[{"name":"Friedrich-Alexander-University Erlangen-N\u00fcrnberg (FAU), Department of Internal Medicine 3, Rheumatology and Immunology, Universit\u00e4tsklinikum Erlangen, Erlangen, Germany"},{"name":"Department of Otorhinolaryngology, Head and Neck Surgery, Section of Experimental Oncology and Nanomedicine (SEON), University Hospital Erlangen, Erlangen, Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"R","family":"Bilyy","sequence":"additional","affiliation":[{"name":"Friedrich-Alexander-University Erlangen-N\u00fcrnberg (FAU), Department of Internal Medicine 3, Rheumatology and Immunology, Universit\u00e4tsklinikum Erlangen, Erlangen, Germany"},{"name":"Danylo Halytsky Lviv National Medical University, Lviv, Ukraine"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"G","family":"Schett","sequence":"additional","affiliation":[{"name":"Friedrich-Alexander-University Erlangen-N\u00fcrnberg (FAU), Department of Internal Medicine 3, Rheumatology and Immunology, Universit\u00e4tsklinikum Erlangen, Erlangen, Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0900-2048","authenticated-orcid":false,"given":"C","family":"Sj\u00f6wall","sequence":"additional","affiliation":[{"name":"Rheumatology\/Division of Neuro and Inflammation Sciences, Department of 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