title: Effects of cysteine on the pharmacokinetics of oltipraz in rats with protein-calorie malnutrition.
abstract: Effects of cysteine on the pharmacokinetics of oltipraz were investigated after iv (10 mg/kg) and oral (30 mg/kg) administration to male control, protein-calorie malnutrition (PCM), and PCM with oral cysteine supplementation (PCMC) rats. It was reported that oltipraz was mainly metabolized via hepatic CYP1A1/2, 2B1/2, 2C11, 3A1/2, and 2D1 in male rats. The expression and mRNA levels of CYP1A2, 2C11, and 3A1/2 were also reported to decrease in male PCM rats compared with controls. Interestingly, the decreased CYP isozymes in PCM rats returned fully or partially to controls by oral cysteine supplementation (PCMC rats). Hence, it would be expected that in PCM rats, some pharmacokinetic parameters of oltipraz are fully or partially returned to controls by cysteine. This was proven by the following parameters in PCMC rats: the AUC (328, 782, and 416 mug min/mL for control, PCM, and PCMC rats, respectively, after iv administration, and 223, 456, and 242 mug min/mL after oral administration), terminal half-life (130, 212, and 143 min), mean residence time (MRT) (149, 299, and 189 min), and in vitro CL(int) (0.181, 0.107, and 0.153 mL/min/mg protein) were fully returned to controls, and CL and CL(NR) values were partially returned to controls.
authors.affiliation: College of Pharmacy and Research Institute of Pharmaceutical Sciences, Seoul National University, Seoul, South Korea.
authors.forename: Soo K
authors.initials: SK
authors.lastname: Bae
authors.forename: Si H
authors.initials: SH
authors.lastname: Yang
authors.forename: Jin W
authors.initials: JW
authors.lastname: Kim
authors.forename: Taekrho
authors.initials: T
authors.lastname: Kim
authors.forename: Jong W
authors.initials: JW
authors.lastname: Kwon
authors.forename: Myung G
authors.initials: MG
authors.lastname: Lee
mesh_terms: D000818:Animals; D002851:Chromatography, High Pressure Liquid; D003545:Cysteine / Q000494:pharmacology*; D004305:Dose-Response Relationship, Drug; D007275:Injections, Intravenous; D008297:Male; D008862:Microsomes, Liver / Q000378:metabolism; D011502:Protein-Energy Malnutrition / Q000378:metabolism*; D011719:Pyrazines / Q000493:pharmacokinetics*; D051381:Rats; D017207:Rats, Sprague-Dawley; D012556:Schistosomicides / Q000493:pharmacokinetics*; D013871:Thiones; D013876:Thiophenes
chemical_list: D011719:Pyrazines; D012556:Schistosomicides; D013871:Thiones; D013876:Thiophenes; C026209:oltipraz; D003545:Cysteine