title: Macrophage polarization alters the expression and sulfation pattern of glycosaminoglycans.
abstract: Macrophages are major cells of inflammatory process and take part in a large number of physiological and pathological processes. According to tissue environment, they can polarize into pro-inflammatory (M1) or alternative (M2) cells. Although many evidences have hinted to a potential role of cell-surface glycosaminoglycans (GAGs) in the functions of macrophages, the effect of M1 or M2 polarization on the biosynthesis of these polysaccharides has not been investigated so far. GAGs are composed of repeat sulfated disaccharide units. Heparan (HS) and chondroitin/dermatan sulfates (CS/DS) are the major GAGs expressed at the cell membrane. They are involved in numerous biological processes, which rely on their ability to selectively interact with a large panel of proteins. More than 20 genes encoding sulfotransferases have been implicated in HS and CS/DS biosynthesis, and the functional repertoire of HS and CS/DS has been related to the expression of these isoenzymes. In this study, we analyzed the expression of sulfotransferases as a response to macrophage polarization. We found that M1 and M2 activation drastically modified the profiles of expression of numerous HS and CS/DS sulfotransferases. This was accompanied by the expression of GAGs with distinct structural features. We then demonstrated that GAGs of M2 macrophages were efficient to present fibroblast growth factor-2 in an assay of tumor cell proliferation, thus indicating that changes in GAG structure may contribute to the functions of polarized macrophages. Altogether, our findings suggest a regulatory mechanism in which fine modifications in GAG biosynthesis may participate to the plasticity of macrophage functions.
authors.affiliation: Unité de Glycobiologie Structurale et Fonctionnelle, UMR 8576 du Centre National de la Recherche Scientiﬁque-Université Lille 1, Sciences et Technologies, Villeneuve d'Ascq F-59655, France.
authors.forename: Pierre
authors.initials: P
authors.lastname: Martinez
authors.affiliation: Unité de Glycobiologie Structurale et Fonctionnelle, UMR 8576 du Centre National de la Recherche Scientiﬁque-Université Lille 1, Sciences et Technologies, Villeneuve d'Ascq F-59655, France.
authors.forename: Agnès
authors.initials: A
authors.lastname: Denys
authors.affiliation: Unité de Glycobiologie Structurale et Fonctionnelle, UMR 8576 du Centre National de la Recherche Scientiﬁque-Université Lille 1, Sciences et Technologies, Villeneuve d'Ascq F-59655, France.
authors.forename: Maxime
authors.initials: M
authors.lastname: Delos
authors.affiliation: Unité de Glycobiologie Structurale et Fonctionnelle, UMR 8576 du Centre National de la Recherche Scientiﬁque-Université Lille 1, Sciences et Technologies, Villeneuve d'Ascq F-59655, France.
authors.forename: Anne-Sophie
authors.initials: AS
authors.lastname: Sikora
authors.affiliation: Unité de Glycobiologie Structurale et Fonctionnelle, UMR 8576 du Centre National de la Recherche Scientiﬁque-Université Lille 1, Sciences et Technologies, Villeneuve d'Ascq F-59655, France.
authors.forename: Mathieu
authors.initials: M
authors.lastname: Carpentier
authors.affiliation: Unité de Glycobiologie Structurale et Fonctionnelle, UMR 8576 du Centre National de la Recherche Scientiﬁque-Université Lille 1, Sciences et Technologies, Villeneuve d'Ascq F-59655, France.
authors.forename: Sylvain
authors.initials: S
authors.lastname: Julien
authors.affiliation: Unité de Glycobiologie Structurale et Fonctionnelle, UMR 8576 du Centre National de la Recherche Scientiﬁque-Université Lille 1, Sciences et Technologies, Villeneuve d'Ascq F-59655, France.
authors.forename: Joël
authors.initials: J
authors.lastname: Pestel
authors.affiliation: Unité de Glycobiologie Structurale et Fonctionnelle, UMR 8576 du Centre National de la Recherche Scientiﬁque-Université Lille 1, Sciences et Technologies, Villeneuve d'Ascq F-59655, France fabrice.allain@univ-lille1.fr.
authors.forename: Fabrice
authors.initials: F
authors.lastname: Allain
mesh_terms: D002478:Cells, Cultured; D006025:Glycosaminoglycans / Q000378:metabolism*; D006801:Humans; D007527:Isoenzymes / Q000235:genetics / Q000378:metabolism; D008262:Macrophage Activation; D008264:Macrophages / Q000201:enzymology / Q000276:immunology / Q000378:metabolism*; D015238:Sulfotransferases / Q000235:genetics / Q000378:metabolism*
chemical_list: D006025:Glycosaminoglycans; D007527:Isoenzymes; C020341:glucosaminoglycans; D015238:Sulfotransferases
keywords: glycosaminoglycan; macrophage; sulfotransferases