NDLI: Quantitative determination of zolmitriptan in rat blood and cerebrospinal fluid by reversed phase HPLC-ESI-MS/MS analysis: application to in vivo preclinical pharmacokinetic study.

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Quantitative determination of zolmitriptan in rat blood and cerebrospinal fluid by reversed phase HPLC-ESI-MS/MS analysis: application to in vivo preclinical pharmacokinetic study.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Dalpiaz, Alessandro Marchetti, Nicola Cavazzini, Alberto Pasti, Luisa Velaga, Sitaram Gavini, Elisabetta Beggiato, Sarah Ferraro, Luca
Description	Country affiliation: Italy Author Affiliation: Dalpiaz A ( Department of Pharmaceutical Sciences, University of Ferrara, via Fossato di Mortara 19, 44121 Ferrara, Italy.)
Abstract	A fast HPLC-ESI-MS/MS method has been developed and validated for the quantification of the potent and selective antimigraine zolmitriptan in rat blood and cerebrospinal fluid (CSF). The assay has been then applied for in vivo preclinical studies. The analytical determination has been used to obtain pharmacokinetics of zolmitriptan in the two biological matrices after its intravenous or nasal administration. Liquid-liquid extraction of zolmitriptan was performed from 100 µL rat blood samples in the presence of N(6)-cyclopentyladenosine (internal standard) with the employment of ethyl acetate. Calibration standards were prepared by using blood matrix and following the same liquid-liquid extraction procedure. CSF samples were analyzed without any pre-treatment steps and by using an external calibration method in pure water matrix. Chromatographic separation was performed under reversed phase and a gradient elution condition on a C18 packed column (100 × 2.0 mm, 2.5 µm particles diameter). The mobile phase was a mixture between acetonitrile, water and formic acid (0.1% v/v). The applied HPLC-MS/MS method allowed low limits of detection, as calculated from calibration curves, of 6.6 and 24.4 ng/mL for water matrix and rat blood extracts, respectively. Linearity of the calibration curves was established up to 5 µM (1.44 µg/mL), as well as good assay accuracy. The intravenous infusion of 20 µg zolmitriptan to male Sprague-Dawley rats produced blood concentrations ranging from 9.4±0.7 to 1.24±0.07 µg/mL within 10 h, with a terminal half-life of 3.4±0.2h. The nasal administration of a water suspension of 20 µg zolmitriptan produced blood concentrations ranging from 2.92±0.21 to 0.85±0.07 µg/mL within 6h. One hour after zolmitriptan intravenous infusion or nasal administration, its CSF concentrations were 0.0539±0.0016 and 0.0453±0.0012 µg/mL, respectively. This study determined the suitability of the herein proposed method to investigate the pharmacokinetics of zolmitriptan after its administration by means of novel formulations and, hence, to evaluate the efficacy of innovative nose-to-brain drug delivery in preclinical studies.
File Format	HTM / HTML
ISSN	15700232
Volume Number	901
e-ISSN	1873376X
Journal	Journal of Chromatography B
Language	English
Publisher	Elsevier
Publisher Date	2012-07-15
Publisher Place	Netherlands
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Discipline Analytical Chemistry Chromatography, High Pressure Liquid Methods Oxazolidinones Blood Cerebrospinal Fluid Tandem Mass Spectrometry Tryptamines Adenosine Analogs & Derivatives Animals Drug Stability Linear Models Male Pharmacokinetics Rats Rats, Sprague-dawley Reproducibility Of Results Sensitivity And Specificity Spectrometry, Mass, Electrospray Ionization Journal Article Research Support, Non-u.s. Gov't
Content Type	Text
Resource Type	Article
Subject	Cell Biology Medicine Analytical Chemistry Clinical Biochemistry Biochemistry

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