title: Enantioselective liquid chromatographic-electrospray mass spectrometric assay of beta-adrenergic blockers: application to a pharmacokinetic study of sotalol in human plasma.
abstract: An enantioselective high performance liquid chromatographic-electrospray ionization mass spectrometric (HPLC-ESI-MS) method for the direct determination of several beta-adrenergic blockers was developed and validated. The method is based on the direct separation of the enantiomers of drugs on a laboratory-made chiral stationary phase (CSP) containing covalently bonded teicoplanin (TE) as chiral selector. Detection of the effluent was performed by electrospray ionization mass spectrometry, run in the selected-ion recording (SIR) mode. The method was applied to the pharmacokinetic monitoring of sotalol (STL) in the plasma of five young healthy volunteers, dosed with racemic drug. The limits of quantitation (LOQ) reached 4 ng/ml for both sotalol enantiomers. Such a method, fully validated, offers a novel, fast and very efficient tool for the direct determination of sotalol enantiomers in human plasma, and can be generally applied to the beta-adrenergic blockers stereoselective pharmacokinetics.
authors.affiliation: Dipartimento di Studi di Chimica e Tecnologia delle Sostanze Biologicamente Attive, Università La Sapienza, Piazzale Aldo Moro 5, 00185 Rome, Italy.
authors.forename: Elena
authors.initials: E
authors.lastname: Badaloni
authors.forename: Ilaria
authors.initials: I
authors.lastname: D'Acquarica
authors.forename: Francesco
authors.initials: F
authors.lastname: Gasparrini
authors.forename: Silvana
authors.initials: S
authors.lastname: Lalli
authors.forename: Domenico
authors.initials: D
authors.lastname: Misiti
authors.forename: Franco
authors.initials: F
authors.lastname: Pazzucconi
authors.forename: Cesare R
authors.initials: CR
authors.lastname: Sirtori
mesh_terms: D000319:Adrenergic beta-Antagonists / Q000097:blood / Q000493:pharmacokinetics*; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D006801:Humans; D012016:Reference Values; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D013015:Sotalol / Q000097:blood / Q000493:pharmacokinetics*; D021241:Spectrometry, Mass, Electrospray Ionization / Q000379:methods*; D013237:Stereoisomerism
chemical_list: D000319:Adrenergic beta-Antagonists; D013015:Sotalol