title: Highly sensitive determination of Schisandrin and Schisandrin B in plasma of rats after administration of Wurenchun (Fructus Schisandrae Chinensis Extracts) preparations by LC-ESI-MS/MS.
abstract: A sensitive and specific method based on liquid chromatography-tandem mass spectrometry using electrospray ionization (LC-ESI-MS/MS) has been developed for the determination of Schisandrin and Schisandrin B in rat plasma. A 100 microL plasma sample was extracted by methyl tert-butyl ether after spiking the samples with nimodipine (internal standard) and performed on an XTerra(R)MS-C(18) column (150 mm x 2.1 mm, 3.5 mum) with the mobile phase of acetonitrile-water-formic acid (80:20:0.2, v/v) at a flow rate of 0.2 mL/min in a run time of 8.5 min. The lower limit of quantification of the method was 40 ng/mL for Schisandrin and 20 ng/mL for Schisandrin B. The method showed reproducibility with intra-day and inter-day precision of less than 13.8% RSD, as well as accuracy, with inter- and intra-assay accuracies between 93.5 and 107.2%. Finally, the LC-ESI-MS/MS method was successfully applied to study the pharmacokinetics of Schisandrin and Schisandrin B in rats after administration of Wurenchun commercial formulations to rats.
authors.affiliation: Department of Pharmaceutics, School of Pharmacy, Harbin Medical University, Harbin, 150086, China.
authors.forename: Jingling
authors.initials: J
authors.lastname: Tang
authors.forename: Bing
authors.initials: B
authors.lastname: Shao
authors.forename: Yan
authors.initials: Y
authors.lastname: Liu
authors.forename: Hongmei
authors.initials: H
authors.lastname: Liu
authors.forename: Hongyu
authors.initials: H
authors.lastname: Ji
authors.forename: Daling
authors.initials: D
authors.lastname: Zhu
authors.forename: Linhua
authors.initials: L
authors.lastname: Wu
mesh_terms: D000818:Animals; D002853:Chromatography, Liquid / Q000379:methods*; D034242:Cyclooctanes / Q000097:blood*; D004365:Drugs, Chinese Herbal / Q000008:administration & dosage*; D017705:Lignans / Q000097:blood*; D008297:Male; D011083:Polycyclic Compounds / Q000097:blood*; D051381:Rats; D017207:Rats, Sprague-Dawley; D021241:Spectrometry, Mass, Electrospray Ionization / Q000379:methods*; D053719:Tandem Mass Spectrometry / Q000379:methods
chemical_list: D034242:Cyclooctanes; D004365:Drugs, Chinese Herbal; D017705:Lignans; D011083:Polycyclic Compounds; C015499:schizandrin B; C011105:schizandrin