Your browser doesn't support javascript.
loading
Montrer: 20 | 50 | 100
Résultats 1 - 4 de 4
Filtrer
Plus de filtres











Base de données
Gamme d'année
1.
Br J Sports Med ; 49(9): 614-22, 2015 May.
Article de Anglais | MEDLINE | ID: mdl-25878079

RÉSUMÉ

BACKGROUND: The FIFA has implemented an important antidoping programme for the 2014 FIFA World Cup. AIM: To perform the analyses before and during the World Cup with biological monitoring of blood and urine samples. METHODS: All qualified players from the 32 teams participating in the World Cup were tested out-of-competition. During the World Cup, 2-8 players per match were tested. Over 1000 samples were collected in total and analysed in the WADA accredited Laboratory of Lausanne. RESULTS: The quality of the analyses was at the required level as described in the WADA technical documents. The urinary steroid profiles of the players were stable and consistent with previously published papers on football players. During the competition, amphetamine was detected in a sample collected on a player who had a therapeutic use exemption for attention deficit hyperactivity disorder. The blood passport data showed no significant difference in haemoglobin values between out-of-competition and postmatch samples. CONCLUSIONS: Logistical issues linked to biological samples collection, and the overseas shipment during the World Cup did not impair the quality of the analyses, especially when used as the biological passport of football players.


Sujet(s)
Dopage sportif/prévention et contrôle , Football/physiologie , Amfétamine/analyse , Androstènedione/analogues et dérivés , Androstènedione/analyse , Analyse chimique du sang/méthodes , Brésil , Clenbutérol/analyse , Glucocorticoïdes/analyse , Humains , Manipulation d'échantillons/méthodes , Stéroïdes/analyse , Détection d'abus de substances/méthodes , Tramadol/analyse , Examen des urines/méthodes
2.
Forensic Sci Int ; 213(1-3): 104-8, 2011 Dec 10.
Article de Anglais | MEDLINE | ID: mdl-21816554

RÉSUMÉ

Recently, pharmaceutical industry developed a new class of therapeutics called Selective Androgen Receptor Modulator (SARM) to substitute the synthetic anabolic drugs used in medical treatments. Since the beginning of the anti-doping testing in sports in the 1970s, steroids have been the most frequently detected drugs mainly used for their anabolic properties. The major advantage of SARMs is the reduced androgenic activities which are the main source of side effects following anabolic agents' administration. In 2010, the Swiss laboratory for doping analyses reported the first case of SARMs abuse during in-competition testing. The analytical steps leading to this finding are described in this paper. Screening and confirmation results were obtained based on liquid chromatography tandem mass spectrometry (LC-MS/MS) analyses. Additional information regarding the SARM S-4 metabolism was investigated by ultra high-pressure liquid chromatography coupled to quadrupole time-of-flight mass spectrometer (UHPLC-QTOF-MS).


Sujet(s)
Acétamides/urine , Aminophénols/urine , Anabolisants/urine , Dopage sportif , Substances améliorant les performances/urine , Détection d'abus de substances/méthodes , Chromatographie en phase liquide à haute performance , Femelle , Humains , Spectrométrie de masse ESI , Spectrométrie de masse en tandem
3.
Forensic Sci Int ; 213(1-3): 73-84, 2011 Dec 10.
Article de Anglais | MEDLINE | ID: mdl-21719221

RÉSUMÉ

Tobacco consumption is a global epidemic responsible for a vast burden of disease. With pharmacological properties sought-after by consumers and responsible for addiction issues, nicotine is the main reason of this phenomenon. Accordingly, smokeless tobacco products are of growing popularity in sport owing to potential performance enhancing properties and absence of adverse effects on the respiratory system. Nevertheless, nicotine does not appear on the 2011 World Anti-Doping Agency (WADA) Prohibited List or Monitoring Program by lack of a comprehensive large-scale prevalence survey. Thus, this work describes a one-year monitoring study on urine specimens from professional athletes of different disciplines covering 2010 and 2011. A method for the detection and quantification of nicotine, its major metabolites (cotinine, trans-3-hydroxycotinine, nicotine-N'-oxide and cotinine-N-oxide) and minor tobacco alkaloids (anabasine, anatabine and nornicotine) was developed, relying on ultra-high pressure liquid chromatography coupled to triple quadrupole mass spectrometry (UHPLC-TQ-MS/MS). A simple and fast dilute-and-shoot sample treatment was performed, followed by hydrophilic interaction chromatography-tandem mass spectrometry (HILIC-MS/MS) operated in positive electrospray ionization (ESI) mode with multiple reaction monitoring (MRM) data acquisition. After method validation, assessing the prevalence of nicotine consumption in sport involved analysis of 2185 urine samples, accounting for 43 different sports. Concentrations distribution of major nicotine metabolites, minor nicotine metabolites and tobacco alkaloids ranged from 10 (LLOQ) to 32,223, 6670 and 538 ng/mL, respectively. Compounds of interest were detected in trace levels in 23.0% of urine specimens, with concentration levels corresponding to an exposure within the last three days for 18.3% of samples. Likewise, hypothesizing conservative concentration limits for active nicotine consumption prior and/or during sport practice (50 ng/mL for nicotine, cotinine and trans-3-hydroxycotinine and 25 ng/mL for nicotine-N'-oxide, cotinine-N-oxide, anabasine, anatabine and nornicotine) revealed a prevalence of 15.3% amongst athletes. While this number may appear lower than the worldwide smoking prevalence of around 25%, focusing the study on selected sports highlighted more alarming findings. Indeed, active nicotine consumption in ice hockey, skiing, biathlon, bobsleigh, skating, football, basketball, volleyball, rugby, American football, wrestling and gymnastics was found to range between 19.0 and 55.6%. Therefore, considering the adverse effects of smoking on the respiratory tract and numerous health threats detrimental to sport practice at top level, likelihood of smokeless tobacco consumption for performance enhancement is greatly supported.


Sujet(s)
Athlètes , Nicotine/urine , Tabac sans fumée/analyse , Alcaloïdes/urine , Anabasine/urine , Chromatographie en phase liquide , Cotinine/analogues et dérivés , Cotinine/urine , Dopage sportif , Humains , Spectrométrie de masse , Nicotine/analogues et dérivés , Substances améliorant les performances/urine , Pyridines/urine , Fumer/urine , Spectrométrie de masse ESI
4.
J Chromatogr B Analyt Technol Biomed Life Sci ; 877(29): 3767-70, 2009 Nov 01.
Article de Anglais | MEDLINE | ID: mdl-19800302

RÉSUMÉ

Stimulants are banned in-competition for all categories of sports by the World Anti-Doping Agency. A simple liquid chromatography-tandem mass spectrometry (LC-MS/MS) assay employing electrospray ionisation in positive mode was developed in that work for the quantification in urine specimens of 4-methyl-2-hexaneamine, a primary amine exhibiting sympathomimetic properties. Following a simple pretreatment procedure, the analyte was separated using a gradient mobile phase on reverse phase C8 column. Selected reaction monitoring m/z 116.2-->57.3 was specific for detection of 4-methyl-2-hexaneamine and the assay exhibited a linear dynamic range of 50-700 ng/mL. The validated method has been successfully applied to analyze the target compound in food supplements as well as in urine specimens. The administered drug (40 mg) was detected at the level of 350 ng/mL in the urine up to 4 days.


Sujet(s)
Amines/urine , Amines/composition chimique , Amines/pharmacocinétique , Chromatographie en phase liquide/méthodes , Dopage sportif , Chromatographie gazeuse-spectrométrie de masse/méthodes , Humains , Reproductibilité des résultats , Spectrométrie de masse en tandem/méthodes
SÉLECTION CITATIONS
DÉTAIL DE RECHERCHE