title: Development of a high-performance liquid chromatography-tandem mass spectrometry method for the determination of flurogestone acetate in ovine plasma.
abstract: Flurogestone (FGA) is a synthetic progesterone, with a progestational action higher than that of progesterone itself. It is intended for vaginal use in large animals to induce oestrus synchronization. A quantitative method for the analysis of flurogestone acetate (FGA) in ovine plasma by high-performance liquid chromatography-tandem mass spectrometry (HPLC-MS/MS) has been developed. After the incorporation of megestrol acetate (MGA) as internal standard (IS) and followed by a liquid-liquid extraction from plasma, FGA and MGA were chromatographed using a reverse-phase HPLC column and detected by tandem mass spectrometry with a TurboIonSpray source. Multiple reaction-monitoring (MRM) mode was used for the quantitative determination of FGA in ovine plasma. The precursor ions [M+H](+) at m/z 407.2 and 385.1 for FGA and MGA, respectively, produced product ions at m/z 267.1/285.1 for FGA and m/z 267.1/224.0 for MGA. The validated concentration range was 0.2-5.0 ng/ml based on 500 microl plasma aliquots. The lower limit of quantitation was 0.2 ng/ml. Fully validated selectivity, accuracy, precision and reproducibility criteria for routine use in pharmacokinetic studies were demonstrated.
authors.affiliation: CEVA Santé Animale, Pre-clinical Development, La Ballastière, B.P. 126, 33501 Libourne Cedex, France. stephanie.monnoyer@ceva.com
authors.forename: S
authors.initials: S
authors.lastname: Monnoyer
authors.forename: S
authors.initials: S
authors.lastname: Capancioni
authors.forename: M
authors.initials: M
authors.lastname: Richard
authors.forename: M
authors.initials: M
authors.lastname: Pacaud
authors.forename: J
authors.initials: J
authors.lastname: Guyonnet
mesh_terms: D000818:Animals; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D003425:Flurogestone Acetate / Q000097:blood*; D013058:Mass Spectrometry / Q000379:methods*; D012015:Reference Standards; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D012756:Sheep
chemical_list: D003425:Flurogestone Acetate