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Separation of a BMS drug candidate and acyl glucuronide from seven glucuronide positional isomers in rat plasma via high‐performance liquid chromatography with tandem mass spectrometric detection
Author(s) -
Xue Y.J.,
Simmons Neal J.,
Liu Jane,
Unger Steve E.,
Anderson Danielle F.,
Jenkins Rand G.
Publication year - 2006
Publication title -
rapid communications in mass spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.528
H-Index - 136
eISSN - 1097-0231
pISSN - 0951-4198
DOI - 10.1002/rcm.2502
Subject(s) - chemistry , chromatography , glucuronide , tandem mass spectrometry , formic acid , high performance liquid chromatography , analyte , mass spectrometry , electrospray ionization , sample preparation , calibration curve , detection limit , metabolite , biochemistry
A high‐performance liquid chromatography/tandem mass spectrometry (LC/MS/MS) method has been developed and validated for the determination of a BMS drug candidate and its acyl glucuronide (1‐ O ‐ β glucuronide) in rat plasma. A 50‐µL aliquot of each plasma sample was fortified with acetonitrile containing the internal standard to precipitate proteins and extract the analytes of interest. After mixing and centrifugation, the supernatant from each sample was transferred to a 96‐well plate and injected into an LC/MS/MS system. Chromatographic separation was achieved isocratically on a Phenomenex Luna C 18 , 3 mm × 150 mm, 3 µm column. The mobile phase contained 0.075% formic acid in 70:30 (v/v) acetonitrile/water. Under the optimized chromatographic conditions, the BMS drug candidate and its acyl glucuronide were separated from its seven glucuronide positional isomers within 10 min. Resolution of the parent from all glucuronides and acyl glucuronide from its positional isomers was critical to avoid their interference with quantitation of parent or acyl glucuronide. Detection was by positive ion electrospray MS/MS on a Sciex API 4000. The standard curve, which ranged from 5 to 5000 ng/mL, was fitted to a 1/x 2 weighted quadratic regression model for both the BMS drug candidate and its acyl glucuronide. Whole blood and plasma stability experiments were conducted to establish the sample collection, storage, and processing conditions. The validation results demonstrated that this method was rugged and repeatable. The same methodology has also been used in mouse and human plasma for the determination of the BMS drug candidate and its acyl glucuronide. Copyright © 2006 John Wiley & Sons, Ltd.