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- W2085205517 abstract "Anabolic steroids are among the most frequently detected compounds in doping analysis. They are extensively metabolized and therefore an in-depth knowledge about steroid metabolism is needed. In this study, a liquid chromatography tandem mass spectometry (LC-MS/MS) method based on a precursor ion scan with a uPA-SCID mouse with humanized liver (a chimeric mouse) was explored for the detection of steroid metabolism. Methandienone was used as a model compound. The application of the precursor ion scan method in positive human samples and chimeric mice samples after methandienone administration allowed the detection of most steroid metabolites without any structural restriction. Three hitherto unreported metabolites were found using this approach. These metabolites were characterized using LC-MS/MS and feasible structures were proposed. The structure of one of them, 6-ene-epimethandienone, was confirmed by the synthesis of the reference compound. A selected reaction monitoring (SRM) method for the specific detection of all these metabolites has been developed. The application of this method to several human and chimeric mouse samples confirmed that more than 80% of the steroid metabolites were found in both samples. Only metabolites that are poorly detectable by LC-MS/MS were not detected in some urine samples. The metabolic nature of the unreported metabolites was also confirmed. A global strategy for the detection of steroid metabolites combining both human and chimeric mouse urine is proposed." @default.
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- W2085205517 date "2009-10-26" @default.
- W2085205517 modified "2023-10-16" @default.
- W2085205517 title "Combination of liquid-chromatography tandem mass spectrometry in different scan modes with human and chimeric mouse urine for the study of steroid metabolism" @default.
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- W2085205517 doi "https://doi.org/10.1002/dta.56" @default.
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