Use of dried blood spots in doping control analysis of anabolic steroid esters.
Dried blood spot (DBS) sampling, a technique for whole blood sampling on a piece of filter paper, has more than 50-years tradition, particularly in the diagnostic analysis of metabolic disorders in neonatal screening. Due to the minimal invasiveness, straightforwardness, robustness against manipulation and fastness DBS sampling recommends itself as an advantageous technique in doping control analysis. The present approach highlights the development of a screening assay for the analysis of eight anabolic steroid esters (nandrolone phenylpropionate, trenbolone enanthate, testosterone acetate, testosterone cypionate, testosterone isocaproate, testosterone phenylpropionate, testosterone decanoate and testosterone undecanoate) and nandrolone in DBS. The detection of the intact esters allows an unequivocal proof of the administration of conjugates of exogenous testosterone and its derivatives. Precise, specific and linear conditions were obtained by means of liquid chromatography high resolution/high accuracy mass spectrometry. Sensitivity in the low ppb range was accomplished by the preparation of the methyloxime derivatives of the target compounds. Labeled internal standards (d3-nandrolone, d3-nandrolone caproate and d3-nandrolone undecanoate) were applied to compensate for the broad range in chain length of the esters. The assay presented here outlines the application of DBS for the analysis of anabolic steroid esters in doping controls for the first time providing great potential to simplify the proof of exogenous administration of testosterone.
Institute of Biochemistry, Center for Preventive Doping Research, German Sport University Cologne, Germany.
Laura
L
Tretzel
Institute of Biochemistry, Center for Preventive Doping Research, German Sport University Cologne, Germany.
Andreas
A
Thomas
Institute of Biochemistry, Center for Preventive Doping Research, German Sport University Cologne, Germany.
Hans
H
Geyer
Doping Control Laboratory, Seibersdorf Labor GmbH, Seibersdorf, Austria.
Günter
G
Gmeiner
Doping Control Laboratory, Seibersdorf Labor GmbH, Seibersdorf, Austria.
Guro
G
Forsdahl
Romanian Doping Control Laboratory, National Anti-Doping Agency, Bvd. Basarabia, nr. 37-39, Bucharest, Romania.
Valentin
V
Pop
Institute of Biochemistry, Center for Preventive Doping Research, German Sport University Cologne, Germany.
Wilhelm
W
Schänzer
Institute of Biochemistry, Center for Preventive Doping Research, German Sport University Cologne, Germany. Electronic address: thevis@dshs-koeln.de.
Mario
M
Thevis
D045930:Anabolic Agents / Q000032:analysis*; D002853:Chromatography, Liquid / Q000379:methods; D004300:Doping in Sports; D059788:Dried Blood Spot Testing / Q000379:methods*; D004952:Esters; D005260:Female; D006801:Humans; D008297:Male; D013058:Mass Spectrometry / Q000379:methods; D012015:Reference Standards; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D015813:Substance Abuse Detection / Q000379:methods; D013739:Testosterone / Q000032:analysis
D045930:Anabolic Agents; D004952:Esters; D013739:Testosterone
Anabolic steroid ester; Doping control analysis; Dried blood spots; LC–MS/MS; Mass spectrometry; Testosterone