Long-Term Detection of Methyltestosterone Use by a Yeast Transactivation System
October 2010
in “
Archives of Toxicology
”
Studysummary This study found that the yeast androgen screen (YAS) could detect the activity of methyltestosterone in urine for a longer period than classical GC/MS, potentially identifying long-lasting metabolites.
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The study from 2010 showed that a yeast androgen screen (YAS) was effective in detecting the anabolic steroid methyltestosterone (MT) and its metabolites in human urine for up to 307 hours post-administration, which is significantly longer than the 118 hours detection window provided by the traditional gas chromatography-tandem mass spectrometry (GC-MS/MS). The YAS demonstrated high specificity and sensitivity, detecting MT at very low concentrations (10^-9 M), and was not dependent on knowing the metabolites' chemical structures. This made it a promising pre-screening tool for doping analytics, potentially enhancing the capabilities of GC-MS/MS. The study, supported by the World Anti-Doping Agency, suggested that YAS could be a cost-effective and robust addition to current doping detection methods.
