Titre
Discordant genotyping results using DNA isolated from anti-doping control urine samples.
Type
article
Institution
Externe
Périodique
Auteur(s)
Choong, E.
Auteure/Auteur
Schulze, J.J.
Auteure/Auteur
Ericsson, M.
Auteure/Auteur
Rane, A.
Auteure/Auteur
Ekström, L.
Auteure/Auteur
Liens vers les personnes
ISSN
1942-7611
Statut éditorial
Publié
Date de publication
2017-07
Volume
9
Numéro
7
Première page
994
Dernière page/numéro d’article
1000
Peer-reviewed
Oui
Langue
anglais
Notes
Publication types: Journal Article
Publication Status: ppublish
Publication Status: ppublish
Résumé
The UGT2B17 gene deletion polymorphism is known to correlate to urinary concentration of testosterone-glucuronide and hence this genotype exerts a large impact on the testosterone/epitestosterone (T/E) ratio, a biomarker for testosterone doping. The objective of this study was to assess if DNA isolated from athletes' urine samples (n = 713) obtained in routine doping controls could be targeted for genotyping analysis for future integration in the athlete's passport. A control population (n = 21) including both urine and blood DNA was used for genotyping concordance test. Another aim was to study a large group (n = 596) of authentic elite athletes in respect of urinary steroid profile in relation to genetic variation. First we found that the genotype results when using urine-derived DNA did not correlate sufficiently with the genotype obtained from whole blood DNA. Secondly we found males with one or two UGT2B17 alleles had higher T/E (mean 1.63 ± 0.93) than females (mean 1.28 ± 1.08), p˂0.001. Unexpectedly, we found that several male del/del athletes in power sports had a T/E ˃1. If men in power sport exert a different urinary steroid profile needs to be further investigated. The other polymorphisms investigated in the CYP17A1, UGT2B7 and UGT2B15 genes did not show any associations with testosterone and epitestosterone concentrations. Our results show that genotyping using urine samples according to our method is not useful in an anti-doping setting. Instead, it is of importance for the anti-doping test programs to include baseline values in the ABP to minimize any putative impact of genotype. Copyright © 2016 John Wiley & Sons, Ltd.
Sujets
PID Serval
serval:BIB_293F31ED40B9
PMID
Date de création
2020-12-17T11:59:01.091Z
Date de création dans IRIS
2025-05-20T14:22:31Z