title: Expression of UDP-glucuronosyltransferase 1A6 isoform in Caco-2 cells stimulated with lipopolysaccharide.
abstract: Glucuronidation is an important metabolic process of detoxification in all vertebrates. The reaction is catalyzed by a multigene family of UDP-glucuronosyltransferases (UGTs) able to convert many xenobiotics and endobiotics (hydrophobic substances) to inactive, water-soluble glucuronides. The UGTs play a protective role, facilitating the elimination of potentially toxic metabolites via urine, bile and feces; therefore, impairment of UGTs may have important toxicological consequences. The regulation of UGTs during bacterial infection or inflammation is not well described. In this study, we investigated the in vitro effect of lipopolysaccharide (LPS) on the expression of the UGT1A6 isoform in human colon carcinoma Caco-2 cells. Results demonstrated a significant down-regulation of UGT1A6 expression, both in terms of mRNA and protein levels, and a reduced UGT activity after LPS exposure of cell cultures, suggesting a role for endotoxins on UGT regulation mechanisms.
authors.affiliation: Department of Human Anatomy and Histology, University of Bari, Bari, Italy. ma.panaro@anatomia.uniba.it
authors.forename: Maria Antonietta
authors.initials: MA
authors.lastname: Panaro
authors.forename: Pasqua
authors.initials: P
authors.lastname: Cavallo
authors.forename: Angela
authors.initials: A
authors.lastname: Acquafredda
authors.forename: Antonia
authors.initials: A
authors.lastname: Cianciulli
authors.forename: Rosa
authors.initials: R
authors.lastname: Calvello
authors.forename: Vincenzo
authors.initials: V
authors.lastname: Mitolo
mesh_terms: D018938:Caco-2 Cells; D004789:Enzyme Activation; D004847:Epithelial Cells / Q000166:cytology / Q000276:immunology / Q000378:metabolism*; D005786:Gene Expression Regulation; D014453:Glucuronosyltransferase / Q000096:biosynthesis* / Q000235:genetics; D006801:Humans; D008658:Inactivation, Metabolic; D007422:Intestines / Q000166:cytology; D008070:Lipopolysaccharides / Q000378:metabolism*
chemical_list: D008070:Lipopolysaccharides; C110655:UDP-glucuronosyltransferase, UGT1A6; D014453:Glucuronosyltransferase