title: Determination of acteoside in Cistanche deserticola and Boschniakia rossica and its pharmacokinetics in freely-moving rats using LC-MS/MS.
abstract: A sensitive LC-MS/MS method with a simple solid-phase extraction for the determination of acteoside in rat plasma and tissue homogenates was established for the investigation of bioavailability and brain distribution in freely-moving rats. Acteoside in Cistanche deserticola and Boschniakia rossica was also determined. Acteoside and internal standard were separated on a RP-select B column (125mmx4.6mm i.d., particle size 5microm). The mobile phase consisted of 35% methanol and 65% acetic acid-water (1:100, v/v) at a flow-rate of 1mL/min. Acteoside and the internal standard were monitored using the multiple-reaction monitoring (MRM) mode at m/z transitions of 623-->161 and 609-->301, respectively. The acteoside content was 38.4+/-2.4mg/kg (n=3) for B. rossica, which is obviously lower than 21134.2+/-805.5mg/kg (n=3) of C. deserticola. The protein binding in rat plasma was 75.5+/-1.8%. The brain distribution result indicated that acteoside was evenly distributed in brain tissues (brain stem, cerebellum, the rest of the brain, cortex, hippocampus and striatum) which was about 0.45-0.68% of that in plasma (4.5+/-0.5microg/mL) after 15min of acteoside administration (10mg/kg, i.v.). After acteoside was given (3mg/kg, i.v.; 100mg/kg, p.o.), the oral bioavailability (AUC(p.o.)/dose(p.o.))/(AUC(i.v.)/dose(i.v.)) was only 0.12%.
authors.affiliation: Institute of Traditional Medicine, National Yang-Ming University, Taipei 112, Taiwan.
authors.forename: Yu-Tse
authors.initials: YT
authors.lastname: Wu
authors.forename: Lie-Chwen
authors.initials: LC
authors.lastname: Lin
authors.forename: Jung-Sung
authors.initials: JS
authors.lastname: Sung
authors.forename: Tung-Hu
authors.initials: TH
authors.lastname: Tsai
mesh_terms: D000818:Animals; D019540:Area Under Curve; D002138:Calibration; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D031671:Cistanche / Q000737:chemistry*; D005960:Glucosides / Q000097:blood / Q000493:pharmacokinetics*; D008297:Male; D031670:Orobanchaceae / Q000737:chemistry*; D010636:Phenols / Q000097:blood / Q000493:pharmacokinetics*; D051381:Rats; D017207:Rats, Sprague-Dawley; D012015:Reference Standards; D012680:Sensitivity and Specificity; D021241:Spectrometry, Mass, Electrospray Ionization / Q000379:methods*; D059808:Polyphenols
chemical_list: D005960:Glucosides; D010636:Phenols; C058956:acteoside; D059808:Polyphenols