title: Increase in sialylation and branching in the mouse serum N-glycome correlates with inflammation and ovarian tumour progression.
abstract: Ovarian cancer is the most lethal gynaecological cancer and is often diagnosed in late stage, often as the result of the unavailability of sufficiently sensitive biomarkers for early detection, tumour progression and tumour-associated inflammation. Glycosylation is the most common posttranslational modification of proteins; it is altered in cancer and therefore is a potential source of biomarkers. We investigated the quantitative and qualitative effects of anti-inflammatory (acetylsalicylic acid) and pro-inflammatory (thioglycolate and chlorite-oxidized oxyamylose) drugs on glycosylation in mouse cancer serum. A significant increase in sialylation and branching of glycans in mice treated with an inflammation-inducing compound was observed. Moreover, the increases in sialylation correlated with increased tumour sizes. Increases in sialylation and branching were consistent with increased expression of sialyltransferases and the branching enzyme MGAT5. Because the sialyltransferases are highly conserved among species, the described changes in the ovarian cancer mouse model are relevant to humans and serum N-glycome analysis for monitoring disease treatment and progression might be a useful biomarker.
authors.affiliation: National Institute for Bioprocessing Research and Training (NIBRT) GlycoScience Group, Dublin, Ireland.
authors.forename: Radka
authors.initials: R
authors.lastname: Saldova
authors.forename: Helene
authors.initials: H
authors.lastname: Piccard
authors.forename: Marta
authors.initials: M
authors.lastname: Pérez-Garay
authors.forename: David J
authors.initials: DJ
authors.lastname: Harvey
authors.forename: Weston B
authors.initials: WB
authors.lastname: Struwe
authors.forename: Marie C
authors.initials: MC
authors.lastname: Galligan
authors.forename: Nele
authors.initials: N
authors.lastname: Berghmans
authors.forename: Stephen F
authors.initials: SF
authors.lastname: Madden
authors.forename: Rosa
authors.initials: R
authors.lastname: Peracaula
authors.forename: Ghislain
authors.initials: G
authors.lastname: Opdenakker
authors.forename: Pauline M
authors.initials: PM
authors.lastname: Rudd
mesh_terms: D000688:Amylose / Q000008:administration & dosage / Q000031:analogs & derivatives / Q000494:pharmacology; D000818:Animals; D045744:Cell Line, Tumor; D002851:Chromatography, High Pressure Liquid; D004195:Disease Models, Animal; D018450:Disease Progression; D005260:Female; D006023:Glycoproteins / Q000097:blood* / Q000737:chemistry; D006031:Glycosylation; D006801:Humans; D007249:Inflammation / Q000097:blood* / Q000150:complications / Q000473:pathology*; D051379:Mice; D008970:Molecular Weight; D019158:N-Acetylneuraminic Acid / Q000378:metabolism*; D009438:Neuraminic Acids / Q000378:metabolism; D010051:Ovarian Neoplasms / Q000097:blood* / Q000150:complications / Q000276:immunology / Q000473:pathology*; D012799:Sialyltransferases / Q000378:metabolism; D013864:Thioglycolates / Q000008:administration & dosage / Q000494:pharmacology; D047368:Tumor Burden / Q000187:drug effects
chemical_list: D006023:Glycoproteins; D009438:Neuraminic Acids; D013864:Thioglycolates; C002668:oxyamylose; C032592:N-glycolylneuraminic acid; D000688:Amylose; D012799:Sialyltransferases; D019158:N-Acetylneuraminic Acid
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