title: Anastrozole quantification in human plasma by high-performance liquid chromatography coupled to photospray tandem mass spectrometry applied to pharmacokinetic studies.
abstract: A rapid, sensitive and specific method for quantifying the aromatase inhibitor (anastrozole) in human plasma using dexchlorpheniramine as the internal standard (I.S.) is described herein. The analyte and the I.S. were extracted from 200 microl of human plasma by liquid-liquid extraction using a mixture of diethyl ether:dichloromethane (70:30, v/v) solution. Extracts were removed and dried in the organic phase then reconstituted with 200 microl of acetonitrile:water (50:50; v/v). The extracts were analyzed by high performance liquid chromatography coupled with photospray tandem mass spectrometry (HPLC-MS-MS). Chromatography was performed isocratically on a Genesis, C18 4 microm analytical column (100 mm x 2.1mm i.d.). The method had a chromatographic run time of 2.5 min and a linear calibration curve ranging from 0.05-10 ng ml(-1). The limit of quantification (LOQ) was 0.05 ng ml(-1). This HPLC-MS-MS procedure was used to assess pharmacokinetic studies.
authors.affiliation: Galeno Research Unit, Latino Coelho St., 1301 Parque Taquaral, 13087-010 Campinas, SP, Brazil.
authors.forename: Gustavo D
authors.initials: GD
authors.lastname: Mendes
authors.forename: Daniele
authors.initials: D
authors.lastname: Hamamoto
authors.forename: Jaime
authors.initials: J
authors.lastname: Ilha
authors.forename: Alberto dos Santos
authors.initials: Ados S
authors.lastname: Pereira
authors.forename: Gilberto
authors.initials: G
authors.lastname: De Nucci
mesh_terms: D000077384:Anastrozole; D047072:Aromatase Inhibitors / Q000097:blood* / Q000493:pharmacokinetics; D002138:Calibration; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D006801:Humans; D009570:Nitriles / Q000097:blood* / Q000493:pharmacokinetics; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D053719:Tandem Mass Spectrometry / Q000379:methods*; D014230:Triazoles / Q000097:blood* / Q000493:pharmacokinetics
chemical_list: D047072:Aromatase Inhibitors; D009570:Nitriles; D014230:Triazoles; D000077384:Anastrozole