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https://www.readbyqxmd.com/read/26990774/specific-characterization-of-non-steroidal-selective-androgen-peceptor-modulators-using-supercritical-fluid-chromatography-coupled-to-ion-mobility-mass-spectrometry-application-to-the-detection-of-enobosarm-in-bovine-urine
#1
Laure Beucher, Gaud Dervilly-Pinel, Nora Cesbron, Mylène Penot, Audrey Gicquiau, Fabrice Monteau, Bruno Le Bizec
Currently under development for therapeutic purposes in human medicine, non-steroidal selective androgen receptor modulators (non-steroidal SARMs) are also known to impact growth associated pathways. As such, they present a potential for abuse in sports and food-producing animals as interesting alternative anabolic substances. Forbidden since 2008 by the World Anti-Doping Agency (WADA) these compounds are however easily available and could be (mis)used in livestock production as growth promoters. To prevent such practices, dedicated analytical strategies have to be developed for specific and sensitive detection of these compounds in biological matrices...
March 16, 2016: Drug Testing and Analysis
https://www.readbyqxmd.com/read/26969924/investigation-of-the-selective-androgen-receptor-modulators-s1-s4-and-s22-and-their-metabolites-in-equine-plasma-using-high-resolution-mass-spectrometry
#2
Annelie Hansson, Heather Knych, Scott Stanley, Mario Thevis, Ulf Bondesson, Mikael Hedeland
RATIONALE: Selective androgen receptor modulators (SARMs) are prohibited in sports due to their performance enhancing ability. It is important to investigate the metabolism to determine appropriate targets for doping control. This is the first study where the equine metabolites of SARMs S1, S4 (Andarine) and S22 (Ostarine) have been studied in plasma. METHODS: Each SARM was administered to three horses as an intravenous bolus dose and plasma samples were collected...
April 15, 2016: Rapid Communications in Mass Spectrometry: RCM
https://www.readbyqxmd.com/read/26456227/detection-of-the-selective-androgen-receptor-modulator-andarine-s-4-in-a-routine-equine-blood-doping-control-sample
#3
LETTER
Adam T Cawley, Corrine Smart, Candace Greer, Marcus Liu Lau, John Keledjian
No abstract text is available yet for this article.
February 2016: Drug Testing and Analysis
https://www.readbyqxmd.com/read/22231507/sensitive-determination-of-prohibited-drugs-in-dried-blood-spots-dbs-for-doping-controls-by-means-of-a-benchtop-quadrupole-orbitrap-mass-spectrometer
#4
Andreas Thomas, Hans Geyer, Wilhelm Schänzer, Catharina Crone, Markus Kellmann, Thomas Moehring, Mario Thevis
In the present study, a new type of mass spectrometer combining a quadrupole mass filter, a higher collision dissociation (HCD) cell and an Orbitrap detector, was evaluated for the analysis of dried blood spots (DBS) in doping controls. DBS analysis is characterized by the necessity to detect prohibited compounds in sub-nanogram-per-milliliter levels with high identification capacity. After extraction of DBS with an organic solvent and liquid chromatographic separation (using a regular C18-RP-analytical UHPLC-column) of target analytes, mass spectrometry is performed with a high-resolution full scan in positive and negative mode by means of electrospray ionisation...
May 2012: Analytical and Bioanalytical Chemistry
https://www.readbyqxmd.com/read/22135086/high-throughput-screening-for-various-classes-of-doping-agents-using-a-new-dilute-and-shoot-liquid-chromatography-tandem-mass-spectrometry-multi-target-approach
#5
S Guddat, E Solymos, A Orlovius, A Thomas, G Sigmund, H Geyer, M Thevis, W Schänzer
A new multi-target approach based on liquid chromatography--electrospray ionization tandem mass spectrometry (LC-(ESI)-MS/MS) is presented to screen for various classes of prohibited substances using direct injection of urine specimens. With a highly sensitive new generation hybrid mass spectrometer classic groups of drugs--for example, diuretics, beta2-agonists--stimulants and narcotics are detectable at concentration levels far below the required limits. Additionally, more challenging and various new target compounds could be implemented...
November 2011: Drug Testing and Analysis
https://www.readbyqxmd.com/read/21710598/mass-spectrometric-characterization-of-urinary-metabolites-of-the-selective-androgen-receptor-modulator-s-22-to-identify-potential-targets-for-routine-doping-controls
#6
Mario Thevis, Andreas Thomas, Ines Möller, Hans Geyer, James T Dalton, Wilhelm Schänzer
Drugs that promote anabolic processes with limited undesirable effects are of considerable therapeutic interest; some notable examples include those for the treatment of cancer cachexia and muscle-wasting diseases. Anabolic properties are not only therapeutically beneficial to critically ill and debilitated patients, but are also desirable to athletes seeking artificial enhancements in endurance, strength and accelerated recovery. The use of anabolic agents in the clinical setting is being reconsidered with the emergence of a new class of drugs referred to as SARMs (selective androgen receptor modulators)...
August 15, 2011: Rapid Communications in Mass Spectrometry: RCM
https://www.readbyqxmd.com/read/21204286/confiscated-black-market-products-and-nutritional-supplements-with-non-approved-ingredients-analyzed-in-the-cologne-doping-control-laboratory-2009
#7
REVIEW
Maxie Kohler, Andreas Thomas, Hans Geyer, Michael Petrou, Wilhelm Schänzer, Mario Thevis
Doping control laboratories are frequently confronted with new substances that may be misused by athletes. Besides new pharmaceuticals, where method development for their detection is dependent on the availability of the substance and corresponding administration studies, some professional and amateur athletes are using illicit 'black market' products, which either differ from known pharmaceuticals but cause similar effects or still are undergoing clinical trials and are therefore rarely available to doping control laboratories...
November 2010: Drug Testing and Analysis
https://www.readbyqxmd.com/read/20623476/mass-spectrometric-characterization-of-urinary-metabolites-of-the-selective-androgen-receptor-modulator-andarine-s-4-for-routine-doping-control-purposes
#8
Mario Thevis, Andreas Thomas, Gregor Fusshöller, Simon Beuck, Hans Geyer, Wilhelm Schänzer
Selective androgen receptor modulators (SARMs) are potent anabolic agents with tissue-selective properties. Due to their potential misuse in elite sport, the World Anti-Doping Agency (WADA) has prohibited SARMs since 2008, and although no representative drug candidate has yet received full clinical approval, recent findings of SARMs illegally sold via the internet have further supported the need to efficiently test for these compounds in doping controls. In the present communication, the mass spectrometric characterization of urinary metabolites of the SARM Andarine (also referred to as S-4) compared with earlier in vitro and animal studies is reported...
August 15, 2010: Rapid Communications in Mass Spectrometry: RCM
https://www.readbyqxmd.com/read/20355219/detection-of-the-arylpropionamide-derived-selective-androgen-receptor-modulator-sarm-s-4-andarine-in-a-black-market-product
#9
Mario Thevis, Hans Geyer, Matthias Kamber, Wilhelm Schänzer
Non-steroidal and tissue-selective anabolic agents such as selective androgen receptor modulators (SARMs) represent a promising class of therapeutics for the treatment of various diseases such as sarcopenia or cancer cachexia. Advanced compounds of SARMs are based on an arylpropionamide-derived structure and leading drug candidates have successfully completed phase-II-clinical trials. Although none of these therapeutics have been approved, their performance-enhancing qualities and the black-market availability of these products makes them a viable target for misuse in the athletic community...
August 2009: Drug Testing and Analysis
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