Nandrolone and estradiol biomarkers identification in bovine urine applying a liquid chromatography high-resolution mass spectrometry metabolomics approach

With the aim of specifically investigating patterns associated with three steroid treatments (17 beta-nandrolone, 17 beta-estradiol, and 17 beta-nandrolone + 17 beta-estradiol) in bovine, an reversed phase liquid chromatography (RPLC)-electrospray ionization (ESI)(+/-)-high-resolution mass spectrometry (HRMS) study was conducted to characterize the urinary profiles of involved animals. Although specific fingerprints with strong differences could be highlighted between urinary metabolite profiles within urine samples collected on control and treated animals, it appeared further that significant discriminations could also be observed between steroid treatments, evidencing thus specific patterns and candidate biomarkers associated to each treatment. An MS-2 structural elucidation step enabled level-1 identification of two biomarkers mainly involved in energy pathways, in relation to skeletal muscle functioning. These results make it possible to envisage a global strategy for the detection of anabolic practices involving steroids, while at the same time providing clues as to the compounds used, which would facilitate the confirmation stage to follow.

Automated summary

Through a study using reversed phase liquid chromatography-electrospray ionization-high-resolution mass spectrometry, specific patterns and candidate biomarkers associated with three steroid treatments in bovine urine profiles were identified. Level-1 identification of two biomarkers related to energy pathways and skeletal muscle functioning was achieved through MS-2 structural elucidation.