title: High-performance liquid chromatographic assay for amiodarone N-deethylation activity in human liver microsomes using solid-phase extraction.
abstract: A selective and sensitive assay for amiodarone N-deethylation activity in human liver microsomes by high-performance liquid chromatography (HPLC) with UV detection is reported. The extraction of desethylamiodarone from incubation samples was performed by means of an original solid-phase extraction (SPE) procedure using a polymeric reversed-phase sorbent (Oasis HLB). The method was validated for the determination of desethylamiodarone with respect to specificity, linearity, precision, accuracy, recovery, limit of quantitation and stability. Amiodarone N-deethylation activity from low to high substrate concentrations using human liver microsomes was precisely determined without a concentration step. This method is applicable to the study in vitro of the metabolism of amiodarone.
authors.affiliation: Project Team for Pharmacogenetics, National Institute of Health Sciences, 1-18-1 Kamiyoga, Setagaya-ku, Tokyo 158-8501, Japan.
authors.forename: Nobumitsu
authors.initials: N
authors.lastname: Hanioka
authors.forename: Yoshiro
authors.initials: Y
authors.lastname: Saito
authors.forename: Akiko
authors.initials: A
authors.lastname: Soyama
authors.forename: Masanori
authors.initials: M
authors.lastname: Ando
authors.forename: Shogo
authors.initials: S
authors.lastname: Ozawa
authors.forename: Jun-ichi
authors.initials: J
authors.lastname: Sawada
mesh_terms: D000638:Amiodarone / Q000493:pharmacokinetics*; D000889:Anti-Arrhythmia Agents / Q000493:pharmacokinetics*; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D006801:Humans; D008862:Microsomes, Liver / Q000378:metabolism*; D012015:Reference Standards; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity
chemical_list: D000889:Anti-Arrhythmia Agents; D000638:Amiodarone