title: Liquid chromatography/tandem mass spectrometry for pharmacokinetic studies of 20(R)-ginsenoside Rg3 in dog.
abstract: A sensitive and specific liquid chromatography/tandem mass spectrometry (LC/MS/MS) method was developed for the investigation of the pharmacokinetics of 20(R)-ginsenoside Rg3 in dog. The plasma samples were pretreated by liquid-liquid extraction and analyzed using LC/MS/MS with an electrospray ionization interface. Dioscin was used as the internal standard. The method had a lower limit of quantitation of 0.5 ng/mL for Rg3 in 200 microL of plasma or 2 ng/mL in 100 microL of plasma, which offered a satisfactory sensitivity for the determination of Rg3 in plasma. The intra- and inter-day precisions were measured to be below 8% and accuracy between -1.5 and 1.4% for all quality control samples. This quantitation method was successfully applied to pharmacokinetic studies of Rg3 after both an oral and an intravenous administration to beagle dogs. No Rh2 and protopanaxadiol were detected in plasma.
authors.affiliation: Laboratory of Drug Metabolism and Pharmacokinetics, Shenyang Pharmaceutical University, Shenyang, China.
authors.forename: Ke
authors.initials: K
authors.lastname: Li
authors.forename: Xiaoyan
authors.initials: X
authors.lastname: Chen
authors.forename: Jinghua
authors.initials: J
authors.lastname: Xu
authors.forename: Xin
authors.initials: X
authors.lastname: Li
authors.forename: Dafang
authors.initials: D
authors.lastname: Zhong
mesh_terms: D000284:Administration, Oral; D000818:Animals; D001774:Blood Chemical Analysis / Q000379:methods*; D002853:Chromatography, Liquid / Q000379:methods*; D004285:Dogs; D005260:Female; D036145:Ginsenosides / Q000008:administration & dosage / Q000097:blood* / Q000493:pharmacokinetics*; D007269:Injections, Intra-Arterial; D008297:Male; D013058:Mass Spectrometry / Q000379:methods*; D008657:Metabolic Clearance Rate; D015203:Reproducibility of Results; D012502:Sapogenins / Q000097:blood; D012680:Sensitivity and Specificity; D014315:Triterpenes / Q000097:blood
chemical_list: D036145:Ginsenosides; D012502:Sapogenins; D014315:Triterpenes; C097367:ginsenoside Rg3; C055305:ginsenoside Rh2; C062916:protopanaxadiol