Volume 3, Issue 5 pp. 609-622
Research Article
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Changes of serum-associated fucosylated glycoproteins and changes in glycosylation of IgA in human cirrhosis

Yoann Carré

Yoann Carré

Unité Mixte de Recherche CNRS/USTL 8576, Glycobiologie Structurale et Fonctionnelle, IFR 147, Université des Sciences et Technologies de Lille 1, Villeneuve d'Ascq, France

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André Klein

André Klein

Unité Mixte de Recherche CNRS/USTL 8576, Glycobiologie Structurale et Fonctionnelle, IFR 147, Université des Sciences et Technologies de Lille 1, Villeneuve d'Ascq, France

Laboratoire de Biochimie et de Biologie Moléculaire, UAM de glycopathologies, Centre de Biologie Pathologie, CHRU Lille, Lille, France

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Philippe Mathurin

Philippe Mathurin

Services d'Hépato-Gastroentérologie, Hôpital Huriez, CHRU Lille, Lille, France

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Jean-Claude Michalski

Jean-Claude Michalski

Unité Mixte de Recherche CNRS/USTL 8576, Glycobiologie Structurale et Fonctionnelle, IFR 147, Université des Sciences et Technologies de Lille 1, Villeneuve d'Ascq, France

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Willy Morelle Dr.

Corresponding Author

Willy Morelle Dr.

Unité Mixte de Recherche CNRS/USTL 8576, Glycobiologie Structurale et Fonctionnelle, IFR 147, Université des Sciences et Technologies de Lille 1, Villeneuve d'Ascq, France

Unité Mixte de Recherche CNRS/USTL 8576, Glycobiologie Structurale et Fonctionnelle, IFR 147, Bâtiment C9, Université des Sciences et Technologies de Lille 1, 59655 Villeneuve d'Ascq Cedex, France Fax: +33-3-2043-6555Search for more papers by this author
First published: 22 April 2009
Citations: 5

Abstract

Many modifications in N-glycosylation have been demonstrated in hepatic cirrhosis. These modifications correspond to an increase of a bisecting core alpha(1,6)-fucosylated biantennary glycan, an increase in core fucosylation, and the presence of an important population of neutral oligosaccharides in human serum of cirrhotic patients. In this study, a glycoproteomic approach which consists of lectin affinity chromatography, MALDI-TOF MS for the characterization of N-glycans released from glycoproteins, one- and 2-D PAGE, electrospray ionization quadrupole ion trap (ESI-QIT) MS was used to identify serum fucosylated glycoproteins related to cirrhosis. Employing this method, we have shown that IgA is one of the major proteins that is responsible of the glycosylation modifications observed in the serum N-glycome of cirrhotic patients. To our knowledge, this is the first time that aberrant N-glycosylation of IgA in cirrhosis is described.

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