title: Determination of deoxyschizandrin in rat plasma by LC-MS.
abstract: A simple, rapid and sensitive LC-MS method was developed for quantification of deoxyschizandrin in rat plasma. A 50 miccrol plasma sample was extracted by ether and performed on Elite Hypersil C(18) column (200 mm x 4.6 mm, 5 microm) with the mobile phase of methanol-water (84:16, v/v) in a run time of 6.5 min. The analyte was monitored with positive atmospheric pressure chemical ionization (APCI) by selected ion monitoring (SIM) mode. A good linear relationship was obtained over the range of 1.0-50.0 ng/ml and the validated method was successfully applied for the pharmacokinetic studies of deoxyschizandrin in rat. After oral administration of 4 mg/kg deoxyschizandrin and Schisandra extract which contained the same dose of deoxyschizandrin to male rats, the C(max) of deoxyschizandrin were 15.8+/-3.1 and 34.3+/-16.8 ng/ml, T(max) were 0.51+/-0.13 and 3.83+/-1.83 h, T(1/2) were 5.3+/-2.2 and 6.5+/-3.4h.
authors.affiliation: Department of Pharmaceutical Analysis, Shenyang Pharmaceutical University, Wenhua Road 103, Shenyang 110016, China.
authors.forename: Xinxiu
authors.initials: X
authors.lastname: Deng
authors.forename: Xiaohui
authors.initials: X
authors.lastname: Chen
authors.forename: Ran
authors.initials: R
authors.lastname: Yin
authors.forename: Zhenduo
authors.initials: Z
authors.lastname: Shen
authors.forename: Lei
authors.initials: L
authors.lastname: Qiao
authors.forename: Kaishun
authors.initials: K
authors.lastname: Bi
mesh_terms: D000818:Animals; D019540:Area Under Curve; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D034242:Cyclooctanes / Q000097:blood* / Q000737:chemistry / Q000493:pharmacokinetics; D004305:Dose-Response Relationship, Drug; D017705:Lignans / Q000097:blood* / Q000737:chemistry / Q000493:pharmacokinetics; D008297:Male; D013058:Mass Spectrometry / Q000379:methods*; D008516:Medicine, Chinese Traditional; D008657:Metabolic Clearance Rate; D015394:Molecular Structure; D010936:Plant Extracts / Q000097:blood* / Q000737:chemistry / Q000493:pharmacokinetics; D011083:Polycyclic Compounds / Q000097:blood* / Q000737:chemistry / Q000493:pharmacokinetics; D051381:Rats; D017207:Rats, Sprague-Dawley; D012044:Regression Analysis; D015203:Reproducibility of Results; D032141:Schisandra / Q000737:chemistry*; D013997:Time Factors
chemical_list: D034242:Cyclooctanes; D017705:Lignans; D010936:Plant Extracts; D011083:Polycyclic Compounds; C034734:schizandrin A