title: Drug-metabolizing enzyme and transporter expression in a mouse model of diabetes and obesity.
abstract: Obesity and type II diabetes pose a serious human health risk. Obese or diabetic patients usually take prescription drugs that require hepatic and renal metabolism and transport, and these patients sometimes display different pharmacokinetics of these drugs. Therefore, mRNA and protein expression of drug-metabolizing enzymes (DMEs) and transporters was measured in livers and kidneys of adult wild-type and ob/ob mice, which model obesity and diabetes. mRNA expression of numerous DMEs increased by at least 2-fold in livers of male ob/ob mice, including Cyp4a14, Cyp2b10, NAD(P)H:quinone oxidoreductase 1 (Nqo1), and sulfotransferase 2a1/2. In general, expression of uptake transporters was decreased in livers of ob/ob mice, namely organic anion-transporting polypeptides (Oatps) and sodium/taurocholate cotransporting polypeptide (Ntcp). In particular, Oatp1a1 mRNA and protein expression in livers of ob/ob mice was diminished to <5% and <15% of that in wild-types, respectively. Generally, the mRNA and protein expression of efflux transporters multidrug resistance-associated proteins (Mrps) was increased in livers of ob/ob mice, particularly with Mrp4 expression being elevated by at least 6-fold and Mrp2 expression at least 3-fold in livers of ob/ob mice. In kidney, Nqo1, Mrp3, 4, Oatp1a1, and organic anion transporter 2 (Oat2) showed significant alterations with mRNA expression levels in ob/ob mice, being increased for Nqo1 and Mrp4 and decreased for Mrp3, Oatp1a1, and Oat2. In summary, the expression of a number of DMEs and transporters was significantly altered in livers and kidneys of ob/ob mice. Since expression of some DMEs and transporters is regulated similarly between mouse and human, the data from this study suggest that transporter expression in liver and kidney may be changed in patients presenting with obesity and/or type II diabetes.
authors.affiliation: Department of Biomedical and Pharmaceutical Sciences, University of Rhode Island, Kingston, Rhode Island 02881, USA.
authors.forename: Qiuqiong
authors.initials: Q
authors.lastname: Cheng
authors.forename: Lauren M
authors.initials: LM
authors.lastname: Aleksunes
authors.forename: José E
authors.initials: JE
authors.lastname: Manautou
authors.forename: Nathan J
authors.initials: NJ
authors.lastname: Cherrington
authors.forename: George L
authors.initials: GL
authors.lastname: Scheffer
authors.forename: Hideki
authors.initials: H
authors.lastname: Yamasaki
authors.forename: Angela L
authors.initials: AL
authors.lastname: Slitt
mesh_terms: D000818:Animals; D001189:Aryl Hydrocarbon Hydroxylases / Q000235:genetics / Q000378:metabolism; D001692:Biological Transport; D015153:Blotting, Western; D003577:Cytochrome P-450 Enzyme System / Q000235:genetics / Q000378:metabolism; D000072467:Cytochrome P450 Family 2; D000072470:Cytochrome P450 Family 4; D003920:Diabetes Mellitus / Q000235:genetics / Q000378:metabolism* / Q000473:pathology; D004195:Disease Models, Animal; D005260:Female; D007668:Kidney / Q000378:metabolism* / Q000473:pathology; D008099:Liver / Q000378:metabolism* / Q000473:pathology; D008297:Male; D051379:Mice; D008810:Mice, Inbred C57BL; D008820:Mice, Obese; D006899:Mixed Function Oxygenases / Q000235:genetics / Q000378:metabolism; D027425:ATP-Binding Cassette, Sub-Family C Proteins / Q000235:genetics / Q000378:metabolism; D016660:NAD(P)H Dehydrogenase (Quinone); D009252:NADPH Dehydrogenase / Q000235:genetics / Q000378:metabolism; D009765:Obesity / Q000235:genetics / Q000378:metabolism* / Q000473:pathology; D027361:Organic Anion Transporters / Q000235:genetics / Q000378:metabolism*; D012333:RNA, Messenger / Q000235:genetics / Q000378:metabolism; D013250:Steroid Hydroxylases / Q000235:genetics / Q000378:metabolism; D013347:Subcellular Fractions
chemical_list: D001189:Aryl Hydrocarbon Hydroxylases; D003577:Cytochrome P-450 Enzyme System; D000072467:Cytochrome P450 Family 2; D000072470:Cytochrome P450 Family 4; D006899:Mixed Function Oxygenases; D027425:ATP-Binding Cassette, Sub-Family C Proteins; D016660:NAD(P)H Dehydrogenase (Quinone); D009252:NADPH Dehydrogenase; D027361:Organic Anion Transporters; D012333:RNA, Messenger; D013250:Steroid Hydroxylases; C436963:Cyp4a14 protein, mouse; C114462:multidrug resistance-associated protein 3; C101679:Cyp2b10 protein, mouse; C491732:Nqo1 protein, mouse