title: Effect of ursodeoxycholic acid treatment on the expression and function of multidrug resistance-associated protein 2 in rat intestine.
abstract: Effect of ursodeoxycholic acid (UDCA) treatment on the expression and function of intestinal multidrug resistance-associated protein (Mrp) 2 was examined in rats. When rats were orally administered 0.5% UDCA solution for 6 days, mRNA and protein levels of Mrp2 in the intestine were increased about twofold compared with those in untreated rats. In in vitro everted sac study, Mrp2-mediated efflux of 2,4-dinitrophenyl-S-glutathione (DNP-SG) to the mucosal surface was shown to be increased by UDCA treatment. In vivo intestinal exsorption clearance of DNP-SG was also increased by UDCA treatment. In addition, in situ intestinal absorption of methotrexate, a substrate of Mrp2, was decreased by the treatment. These results indicate that the expression and function of intestinal Mrp2 is up-regulated by oral administration of UDCA.
authors.affiliation: Department of Pharmaceutics and Therapeutics, Graduate School of Biomedical Sciences, Hiroshima University, 1-2-3 Kasumi, Minami-ku, Hiroshima 734-8553, Japan.
authors.forename: Ryoko
authors.initials: R
authors.lastname: Yumoto
authors.forename: Shota
authors.initials: S
authors.lastname: Hamada
authors.forename: Kaori
authors.initials: K
authors.lastname: Okada
authors.forename: Yuki
authors.initials: Y
authors.lastname: Kato
authors.forename: Mika
authors.initials: M
authors.lastname: Ikehata
authors.forename: Junya
authors.initials: J
authors.lastname: Nagai
authors.forename: Mikihisa
authors.initials: M
authors.lastname: Takano
mesh_terms: D000818:Animals; D005786:Gene Expression Regulation / Q000187:drug effects*; D007413:Intestinal Mucosa / Q000187:drug effects / Q000378:metabolism / Q000502:physiology; D007583:Jejunum / Q000187:drug effects* / Q000378:metabolism*; D008297:Male; D000089762:Multidrug Resistance-Associated Protein 2; D027425:ATP-Binding Cassette, Sub-Family C Proteins / Q000096:biosynthesis* / Q000235:genetics / Q000502:physiology; D051381:Rats; D017208:Rats, Wistar; D016896:Treatment Outcome; D014580:Ursodeoxycholic Acid / Q000494:pharmacology*
chemical_list: D000089762:Multidrug Resistance-Associated Protein 2; D027425:ATP-Binding Cassette, Sub-Family C Proteins; D014580:Ursodeoxycholic Acid