Simultaneous determination of seven taxoids in rat plasma by UPLC-MS/MS and pharmacokinetic study after oral administration of Taxus yunnanensis extracts
- PMID: 25645339
- DOI: 10.1016/j.jpba.2015.01.001
Simultaneous determination of seven taxoids in rat plasma by UPLC-MS/MS and pharmacokinetic study after oral administration of Taxus yunnanensis extracts
Abstract
A rapid, sensitive and reliable method has been developed and validated for the simultaneous determination of seven taxoids including 10-deacetylbaccatin III (10-DAB III), baccatin III, 5-epi-canadensene, taxinine M, 10-deacetyltaxol (10-DAT), cephalomannine and paclitaxel in rat plasma using docetaxel as the internal standard (IS). The plasma samples were pretreated by liquid-liquid extraction with methyl tert-butyl ether. The chromatographic separation was achieved on a C18 column (50 mm × 2.1 mm, 1.8 μm, Waters, USA) with a gradient elution program consisting of methanol and water (containing 0.1% formic acid) at a flow rate of 0.2 mL/min. Detection was performed under the selected reaction monitoring (SRM) scan using an electrospray ionization (ESI) in the positive ion mode. The mass transitions were as follows: m/z 567.4→444.9 for 10-DAB III, m/z 609.0→549.3 for baccatin III, m/z 617.4→496.9 for 5-epi-canadensene, m/z 709.6→649.3 for taxinine M, m/z 834.8→307.9 for 10-DAT, m/z 854.5→285.4 for cephalomannine, m/z 876.8→307.3 for paclitaxel and m/z 830.8→549.6 for IS, respectively. All calibration curves exhibited good linearity (r(2)>0.99) over a wide concentration range for all components. The intra-day and inter-day precisions at three different levels were both less than 14.3% in terms of relative standard deviation (RSD) and the accuracies ranged from -8.3% to 14.8% in terms of relative error (RE). The extraction recoveries of the seven compounds ranged from 62.5% to 100.5%. The developed method was successfully applied to the pharmacokinetic study of the seven taxoids in rat plasma after oral administration of the crude extract of the twigs and leaves of Taxus yunnanensis.
Keywords: Pharmacokinetics; Plasma concentration; Taxoids; Taxus yunnanensis; UPLC–MS/MS.
Copyright © 2015 Elsevier B.V. All rights reserved.
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