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All rights reserved. http://resource.belframework.org/belframework/1.0/knowledge/large_corpus.bel http://purl.org/dc/elements/1.1/title BEL Framework Large Corpus Document http://resource.belframework.org/belframework/1.0/knowledge/large_corpus.bel http://purl.org/pav/authoredBy http://www.tkuhn.ch/bel2nanopub/RAUwNRddefiqUA9i0AsKoqsz-nBbyL7YCD9hLwqCcqJRM#_6 http://resource.belframework.org/belframework/1.0/knowledge/large_corpus.bel http://purl.org/pav/version 1.4 http://www.tkuhn.ch/bel2nanopub/RAUwNRddefiqUA9i0AsKoqsz-nBbyL7YCD9hLwqCcqJRM#_5 http://www.w3.org/ns/prov#value There is increasing evidence that inflammation may affect glycosylation and sulfation of various glycoproteins. The present study reports the effect of tumor necrosis factor alpha (TNF-alpha), a proinflammatory cytokine, on the glycosyl- and sulfotransferases of the human bronchial mucosa responsible for the biosynthesis of Lewis x epitope and of its sialylated and/or sulfated derivatives, which are expressed in human bronchial mucins. Fragments of macroscopically normal human bronchial mucosa were exposed to TNF-alpha at a concentration of 20 ng/ml. TNF-alpha was shown to increase alpha1,3-fucosyltransferase activity as well as expression of the two alpha1,3-fucosyltransferase genes expressed in the human airway, FUT3 and FUT4. It had no influence on alpha1,2-fucosyltransferase activity or FUT2 expression. It also increased alpha2,3-sialyltransferase activity and the expression of ST3Gal-III and, more importantly, ST3Gal-IV and both N-acetylglucosamine 6-O-sulfotransferase and galactose 3-O-sulfotransferase. These results are consistent with the observation of oversialylation and increased expression sialyl-Lewis x epitopes on human airway mucins secreted by patients with severe lung infection such as those with cystic fibrosis, whose airways are colonized by Pseudomonas aeruginosa. 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