title: Structural alterations in outer arms of IgG oligosaccharides in patients with Werner syndrome.
abstract: Werner syndrome (WS) is a heredofamilial disorder characterized by clinicopathological premature aging. In healthy individuals, structural alteration of serum IgG oligosaccharides is known to be an aging phenotype. In the present study, we determined and compared oligosaccharide structures of serum IgG among WS patients, healthy age-sex-matched individuals, and healthy elderly individuals from both sexes in order to reveal whether WS patients exhibit an aging phenotype in terms of IgG oligosaccharide structure. Sialylation and galactosylation levels of IgG oligosaccharides from WS patients were similar to those from healthy elderly individuals in which sialylation and galactosylation levels were significantly lower than those from the healthy age-sex-matched individuals. In contrast, the bisecting N-acetylglucosaminylation level of IgG oligosaccharides from WS patients was comparable to that from the healthy age-sex-matched controls and significantly lower than that of the healthy elderly controls. There was no significant sexual difference in these modifications of IgG oligosaccharides. These results suggest that WS patients exhibit an aging phenotype for structural alterations such as sialylation and galactosylation in the outer arms of IgG oligosaccharides.
authors.affiliation: Institute of Glycotechnology, Tokai University, Hiratsuka, Kanagawa, Japan.
authors.forename: Yasuhiro
authors.initials: Y
authors.lastname: Kuroda
authors.forename: Kohdoh
authors.initials: K
authors.lastname: Shikata
authors.forename: Fujio
authors.initials: F
authors.lastname: Takeuchi
authors.forename: Tomomi
authors.initials: T
authors.lastname: Akazawa
authors.forename: Naoya
authors.initials: N
authors.lastname: Kojima
authors.forename: Munehiro
authors.initials: M
authors.lastname: Nakata
authors.forename: Tsuguo
authors.initials: T
authors.lastname: Mizuochi
authors.forename: Makoto
authors.initials: M
authors.lastname: Goto
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D002240:Carbohydrate Sequence; D016022:Case-Control Studies; D002851:Chromatography, High Pressure Liquid; D005260:Female; D005690:Galactose / Q000737:chemistry; D006801:Humans; D007074:Immunoglobulin G / Q000097:blood / Q000737:chemistry*; D008297:Male; D008875:Middle Aged; D008969:Molecular Sequence Data; D015394:Molecular Structure; D009844:Oligosaccharides / Q000097:blood / Q000737:chemistry*; D010641:Phenotype; D012794:Sialic Acids / Q000737:chemistry; D014898:Werner Syndrome / Q000276:immunology*
chemical_list: D007074:Immunoglobulin G; D009844:Oligosaccharides; D012794:Sialic Acids; D005690:Galactose