| Literature DB >> 12906916 |
Ming Zhao1, Ping He, Michelle A Rudek, Manuel Hidalgo, Sharyn D Baker.
Abstract
A new simple and specific method was developed and validated for the quantitative determination of OSI-774 (Tarceva, Erlotinib) and its metabolite, OSI-420, in human plasma. Sample pretreatment involved a single protein precipitation step with acetonitrile. The analytes were separated on Waters X-Terra C(18) (50 x 2.1 mm I.D., 3.5 microm) analytical column and eluted with acetonitrile-water mobile (70:30, v/v) containing 0.1% formic acid. The analytes of interest were monitored by tandem mass spectrometry with electrospray positive ionization. The overall extraction efficiency was greater than 88% for OSI-774 and 62% for OSI-420, with values for within-day and between-day precision and accuracy of <15%. Compared to previous assays, this method is simple, specific, and reproducible and will be used to characterize the plasma pharmacokinetics of OSI-774 at doses of 50 to 150 mg to optimize treatment with this agent.Entities:
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Year: 2003 PMID: 12906916 DOI: 10.1016/s1570-0232(03)00356-8
Source DB: PubMed Journal: J Chromatogr B Analyt Technol Biomed Life Sci ISSN: 1570-0232 Impact factor: 3.205