title: Effects of Adjuvant-Induced Inflammation on Disposition of Diclofenac and Its Metabolites in Perfused Rat Liver.
abstract: The reactive metabolites of diclofenac (DF) such as 1-O-acyl glucuronide (DF-Glu) are hypothesized to result in idiosyncratic hepatotoxicity. However, it is unclear whether inflammation affects the hepatic disposition of DF and its metabolites. To clarify the alterations in the disposition of DF and its metabolites in inflammatory conditions, we performed in situ perfused rat liver experiments. Using adjuvant arthritis rats as a model of inflammation, the elimination of DF, 4'-hydroxydiclofenac, and DF-Glu from the perfusate was observed to be delayed in comparison with the control. Parameter sensitivity analysis for hepatic DF disposition revealed that the area under the plasma concentration-time curve (AUC) and the maximum concentration (Cmax) of DF-Glu in the liver markedly increased along with a decrease in intrinsic excretion clearance of DF-Glu (CLint,bile,Glu) and an increase in intrinsic glucuronidation clearance (CLint,Glu) of DF-Glu. It is possible that the elimination of DF-Glu from the perfusate in adjuvant arthritis rats was delayed via reduction of biliary excretion of DF-Glu.
authors.affiliation: Department of Pharmacy, Faculty of Pharmacy, Kindai University, Higashi-osaka, Osaka 577-8502, Japan.
authors.forename: Misato
authors.initials: M
authors.lastname: Uraki
authors.affiliation: Department of Pharmacy, Faculty of Pharmacy, Kindai University, Higashi-osaka, Osaka 577-8502, Japan.
authors.forename: Atsushi
authors.initials: A
authors.lastname: Kawase
authors.affiliation: Department of Pharmacy, Faculty of Pharmacy, Kindai University, Higashi-osaka, Osaka 577-8502, Japan.
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Sayama
authors.affiliation: Department of Pharmacy, Faculty of Pharmacy, Kindai University, Higashi-osaka, Osaka 577-8502, Japan.
authors.forename: Yuka
authors.initials: Y
authors.lastname: Matsushima
authors.affiliation: Department of Pharmacy, Faculty of Pharmacy, Kindai University, Higashi-osaka, Osaka 577-8502, Japan. Electronic address: iwaki@phar.kindai.ac.jp.
authors.forename: Masahiro
authors.initials: M
authors.lastname: Iwaki
mesh_terms: D000818:Animals; D000894:Anti-Inflammatory Agents, Non-Steroidal / Q000378:metabolism / Q000627:therapeutic use; D001169:Arthritis, Experimental / Q000188:drug therapy / Q000378:metabolism*; D004008:Diclofenac / Q000378:metabolism* / Q000494:pharmacology / Q000627:therapeutic use; D005260:Female; D008099:Liver / Q000187:drug effects / Q000378:metabolism*; D010477:Perfusion / Q000379:methods*; D011485:Protein Binding / Q000187:drug effects / Q000502:physiology; D051381:Rats; D017207:Rats, Sprague-Dawley
chemical_list: D000894:Anti-Inflammatory Agents, Non-Steroidal; D004008:Diclofenac
keywords: MRP; biliary excretion; disposition; metabolism; transporters