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- W2084457519 abstract "The sialylation of the oligosaccharides from small-intestinal mucins during a 13-day infectious cycle was studied in Sprague–Dawley rats with the parasite Nippostrongylus brasiliensis. Sialic acid analysis and release, permethylation and analysis by GC-MS of the sialylated oligosaccharides isolated from the ‘insoluble’ mucin complex revealed a relative decrease (4–7-fold) of N-glycolylneuraminic acid compared with N-acetylneuraminic acid just before parasite expulsion. Northern blots showed that this effect was due to the decreased expression of a hydroxylase converting CMP-N-acetylneuraminic acid into CMP-N-glycolylneuraminic acid. Analysis of other rat strains showed that this parasite infection also caused the same effect in these animals. Detailed analysis of infected Sprague–Dawley rats revealed four sialylated oligosaccharides not found in the uninfected animals. These new oligosaccharides were characterized in detail and all shown to contain the trisaccharide epitope NeuAc/NeuGcα2-3(GalNAcβ1-4)Galβ1 (where NeuGc is N-glycolyl neuraminic acid). This epitope is similar to the Sda- and Cad-type blood-group antigens and suggests that the infection causes the induction of a GalNAcβ1-4 glycosyltransferase. This model for an intestinal infection suggests that the glycosylation of intestinal mucins is a dynamic process being modulated by the expression of specific enzymes during an infection process." @default.
- W2084457519 created "2016-06-24" @default.
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- W2084457519 date "2000-09-08" @default.
- W2084457519 modified "2023-09-27" @default.
- W2084457519 title "Identification of transient glycosylation alterations of sialylated mucin oligosaccharides during infection by the rat intestinal parasite Nippostrongylus brasiliensis" @default.
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- W2084457519 doi "https://doi.org/10.1042/bj3500805" @default.
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