title: Pharmacokinetics and enterohepatic circulation of (E)-2-ene valproic acid in the rat.
abstract: A pharmacologically active monounsaturated metabolite of valproic acid (VPA), (E)-2-ene VPA, was administered by an intravenous bolus dose of 20 mg/kg to normal and bile-exteriorized rats. The total plasma clearance of (E)-2-ene VPA in normal rats was 4.9 ml/min/kg and in bile-exteriorized rats, 7.7 ml/min/kg. (E)-2-ene was recycled in the plasma of normal rats due to enterohepatic circulation. Approximately 32% of the dose was excreted in the urine of normal rats. Of the administered dose to bile exteriorized rats, approximately 27% was excreted in the urine and 38% in the bile. Administration of (E)-2-ene increased bile flow rate, and the induced choleresis lasted for 3-4 h. (E)-2-ene VPA was largely excreted in apparently conjugated form in the urine and bile. The pharmacokinetics of (E)-2-ene VPA were similar to that of the parent drug VPA.
authors.affiliation: CIBA-GEIGY Corporation, Summit, NJ 07901.
authors.forename: K
authors.initials: K
authors.lastname: Singh
authors.forename: J M
authors.initials: JM
authors.lastname: Orr
authors.forename: F S
authors.initials: FS
authors.lastname: Abbott
mesh_terms: D000818:Animals; D002756:Cholagogues and Choleretics / Q000493:pharmacokinetics; D004764:Enterohepatic Circulation / Q000502:physiology*; D005229:Fatty Acids, Monounsaturated / Q000493:pharmacokinetics* / Q000494:pharmacology; D008297:Male; D008954:Models, Biological; D051381:Rats; D011919:Rats, Inbred Strains
chemical_list: D002756:Cholagogues and Choleretics; D005229:Fatty Acids, Monounsaturated; C014168:2-propyl-2-pentenoic acid