title: A rapid and simple RP-HPLC method for quantification of kirenol in rat plasma after oral administration and its application to pharmacokinetic study.
abstract: A rapid and simple reverse-phase high-performance liquid chromatography (RP-HPLC) was developed and validated for the quantification of kirenol in rat plasma after oral administration. Kirenol and darutoside (internal standard, IS) were extracted from rat plasma using Cleanert™ C(18) solid-phase extraction (SPE) cartridge. Analysis of the extraction was performed on a Thermo ODS-2 Hypersil C(18) reversed-phase column with a gradient eluent composed of acetonitrile and 0.1% phosphoric acid. The flow rate was 1.0 mL/min and the detection wavelength was set at 215 nm. The calibration curve was linear over the range of 9.756-133.333 µg/mL (r(2) = 0.9991) in rat plasma. The lower limits of detection and quantification were 2.857 and 9.756 µg/mL, respectively. The intra- and inter-day precisions (relative standard deviation, RSD) were between 2.24 and 4.46%, with accuracies ranging from 91.80 to 102.74%. The extraction recovery ranged from 98.16 to 107.62% with RSD less than 4.81%. Stability studies showed that kirenol was stable in preparation and analytical process. The present method was successfully applied to the pharmacokinetic study of kirenol in male Sprague-Dawley rats after oral administration at a dose of 50 mg/kg.
authors.affiliation: Department of Integrated Chinese Traditional with Western Medicine, School of Basic Medical Sciences, Peking University, Xueyuan Road 38, Haidian District, Beijing, China.
authors.forename: Xiao-Li
authors.initials: XL
authors.lastname: Song
authors.forename: Qing-Ying
authors.initials: QY
authors.lastname: Zhang
authors.forename: Zhe-Ming
authors.initials: ZM
authors.lastname: Wang
authors.forename: Hong-Zheng
authors.initials: HZ
authors.lastname: Fu
authors.forename: Rui-Qin
authors.initials: RQ
authors.lastname: Qian
mesh_terms: D000284:Administration, Oral; D000438:Alcohols / Q000008:administration & dosage / Q000097:blood* / Q000493:pharmacokinetics; D000818:Animals; D019659:Asteraceae / Q000737:chemistry; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D056148:Chromatography, Reverse-Phase; D004224:Diterpenes / Q000008:administration & dosage / Q000097:blood* / Q000493:pharmacokinetics; D004355:Drug Stability; D004365:Drugs, Chinese Herbal / Q000008:administration & dosage / Q000032:analysis* / Q000493:pharmacokinetics; D016014:Linear Models; D008297:Male; D051381:Rats; D017207:Rats, Sprague-Dawley; D015203:Reproducibility of Results
chemical_list: D000438:Alcohols; D004224:Diterpenes; D004365:Drugs, Chinese Herbal; C560087:kirenol; C062909:darutoside