title: Liquid chromatography tandem mass spectrometry in study of the pharmacokinetics of six steroidal saponins in rats.
abstract: A rapid, simple and sensitive high-performance liquid chromatography tandem mass spectrometry method was developed and validated for simultaneous determination of six main steroidal saponins in Paris polyphylla in rat plasma. Ginsenoside Rg3 was selected as the internal standard (IS). Plasma samples were pretreated with protein precipitation, and the separation was achieved on a reverse phase Agilent poroshell120 EC-C18 column using a gradient mobile phase system of acetonitrile-water containing 0.1% formic acid. The triple quadruple mass spectrometer was set in negative electrospray ionization mode and multiple reaction monitoring (MRM) was used for six steroidal saponins quantification. The precursors to produce ion transitions monitored for polyphyllin I, polyphyllin II, polyphyllin VI, polyphyllin VII, dioscin, gracillin and IS were m/z 899.5>853.4, 1059.5>1013.5, 783.4>737.4, 1075.5>1029.5, 913.5>867.4, 929.5>883.4 and 819.5>783.4, respectively. The intra- and inter-day precisions (RSD%) were less than 13% and the average extraction recoveries ranged from 85% to 97.0% for each analyte. Six steroidal saponins were proved to be stable during sample storage, preparation and analytical procedures. The established method was employed for simultaneous quantification and successfully used for the first time for the pharmacokinetics evaluation of the six main compounds after intragastric administration of P. polyphylla extract in Sprague-Dawley rats.
authors.affiliation: Department of Pharmacy, Eastern Hepatobiliary Surgery Hospital, Second Military Medical University, Shanghai 200438, China; Shan dong Institute of Pharmaceutical Industry, Ji'nan 250101, China.
authors.forename: Benwei
authors.initials: B
authors.lastname: Wang
authors.forename: Songgang
authors.initials: S
authors.lastname: Ji
authors.forename: Hai
authors.initials: H
authors.lastname: Zhang
authors.forename: Liang
authors.initials: L
authors.lastname: Zhao
authors.forename: Lei
authors.initials: L
authors.lastname: Lv
authors.forename: Yueyue
authors.initials: Y
authors.lastname: Li
authors.forename: Guichen
authors.initials: G
authors.lastname: Zhou
authors.forename: Guoqing
authors.initials: G
authors.lastname: Zhang
mesh_terms: D000818:Animals; D002138:Calibration; D002851:Chromatography, High Pressure Liquid; D004144:Diosgenin / Q000031:analogs & derivatives* / Q000302:isolation & purification / Q000493:pharmacokinetics; D004355:Drug Stability; D036145:Ginsenosides / Q000302:isolation & purification / Q000493:pharmacokinetics; D019684:Magnoliopsida / Q000737:chemistry; D008297:Male; D051381:Rats; D017207:Rats, Sprague-Dawley; D012503:Saponins / Q000302:isolation & purification / Q000493:pharmacokinetics*; D012680:Sensitivity and Specificity; D013150:Spirostans / Q000302:isolation & purification / Q000493:pharmacokinetics; D053719:Tandem Mass Spectrometry
chemical_list: D036145:Ginsenosides; D012503:Saponins; D013150:Spirostans; C556217:polyphyllin I; C585643:polyphyllin VII; C044934:gracillin; C097367:ginsenoside Rg3; C019357:dioscin; D004144:Diosgenin
keywords: LC–MS/MS; Pharmacokinetics study; Rat plasma; Steroidal saponins