In:
Bioanalysis, Future Science Ltd, Vol. 4, No. 15 ( 2012-08), p. 1855-1870
Abstract:
Background: An absolute bioavailability study that utilized an intravenous [ 14 C]microdose was conducted for saxagliptin (Onglyza ® ), a marketed drug product for the treatment of Type 2 diabetes mellitus. Concentrations of [ 14 C]saxagliptin were determined by accelerator MS (AMS) after protein precipitation, chromatographic separation by UPLC and analyte fraction collection. A series of investigative experiments were conducted to m aximize the release of the drug from high-affinity receptors and nonspecific adsorption, and to determine a suitable quantitation range. Results: A technique-appropriate validation demonstrated the accuracy, precision, specificity, stability and recovery of the AMS methodology across the concentration range of 0.025 to 15.0 dpm/ml (disintegration per minute per milliliter), the equivalent of 1.91–1144 pg/ml. Based on the study sample analysis, the mean absolute bioavailability of saxagliptin was 50% in the eight subjects with a CV of 6.6%. Incurred sample reanalysis data fell well within acceptable limits. Conclusion: This study demonstrated that the optimized sample pretreatment and chromatographic separation procedures were critical for the successful implementation of an UPLC plus AMS method for [ 14 C]saxagliptin. The use of multiple-point standards are useful, particularly during method development and validation, to evaluate and correct for concentration-dependent recovery, if observed, and to monitor and control process loss and operational variations.
Type of Medium:
Online Resource
ISSN:
1757-6180
,
1757-6199
Language:
English
Publisher:
Future Science Ltd
Publication Date:
2012
SSG:
15,3
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