LC-MS determination of triazolam and its hydroxy metabolites in mouse dried blood spots: application to transgenic mouse pharmacokinetic studies

摘要

The objective of this study was to develop a LC-MS/MS method for the simultaneous determination of triazolam (TRZ) and its two hydroxy metabolites in transgenic mouse dried blood spots ( DBS) using BALB/c mouse blood as a surrogate biomatrix. Methodology/Results: The DBS method involved spotting volume of 10 ae l using Ahlstrom 226 sample collection cards. A 'whole spot' analysis (6-mm punch) involved extraction of analytes using water and acetonitrile containing an internal standard. DBS samples were analyzed by a validated LC-MS/MS method with a run time of 4 min. Conclusion: This validated LC-MS/MS method using DBS extraction was applied to quantitation of TRZ, alpha-hydroxytriazolam and 4-hydroxytriazolam in a CYP3A4 transgenic mouse oral pharmacokinetic study of TRZ.