Implication of Human UGT2B7, 2B15, and 2B17 in 19-Norandrosterone Metabolism [PDF]
Frontiers in Endocrinology, 2013 Nandrolone (19-nortestosterone) is an anabolic androgenic steroid commonly abused for doping purposes. Nandrolone is mainly metabolized in the liver into 19-norandrosterone prior to glucuronidation and excretion through urine over an extended period of ...
Emmanuel Strahm +2 more
exaly +8 more sources
Excretion of 19‐norandrosterone after consumption of boar meat [PDF]
Drug Testing and Analysis, 2020 AbstractThe consumption of the offal of noncastrated pigs can lead to the excretion of 19‐norandrosterone (NorA) in urine of humans. In doping control, GC/C/IRMS is the method of choice to differentiate between an endogenous or exogenous origin of urinary NorA.
Frank Hülsemann +2 more
exaly +5 more sources
Significance of 19-norandrosterone in athletes' urine samples. [PDF]
Br J Sports Med, 2006 Nandrolone and other 19-norsteroid potent anabolic steroids have been prohibited in sports for 30 years. The detection of the main urinary metabolite—19-norandrosterone—in amounts greater than 2 ng/ml constitutes an adverse analytical finding. The presence in nutritional sport supplements of steroids not listed on the label has undoubtedly resulted in ...
Ayotte C.
europepmc +5 more sources
Exogenous Versus Endogenous Nandrolone in Doping Investigations: A Systematic Literature Review [PDF]
Applied SciencesNandrolone, or 19-nortestosterone, is an anabolic steroid derived from testosterone, known for its androgenic and anabolic effects. Often used illicitly by athletes to boost performance, its use is banned by the World Anti-Doping Agency (WADA) in and out
Roberto Scendoni +7 more
doaj +4 more sources
Same, but different: Variations in fragment ions among stereoisomers of a 17α-methyl steroid in gas chromatography/electron ionization mass spectrometry. [PDF]
Rapid Commun Mass SpectromRationale Gas chromatography/electron ionization mass spectrometry (GC/EI-MS) is a well-established tool for the identification of unknown compounds such as new metabolites of xenobiotics.
Steff J, Parr MK.
europepmc +4 more sources
A review of the analytical techniques for the detection of anabolic–androgenic steroids within biological matrices [PDF]
WIREs Forensic Science, Volume 6, Issue 1, January/February 2024., 2023 Anabolic–androgenic steroids (AASs) and other image and performance enhancing drugs (IPEDs) are controlled by governments and sport institutions such as the World Anti-doping Agency (WADA).
De Paoli, Giorgia +3 more
core +4 more sources
The action of physiological and synthetic steroids on the calcium channel CatSper in human sperm. [PDF]
Front Cell Dev Biol, 2023 The sperm-specific channel CatSper (cation channel of sperm) controls the intracellular Ca2+ concentration ([Ca2+]i) and plays an essential role in sperm function.
Wehrli L +9 more
europepmc +3 more sources
Intended or Unintended Doping? A Review of the Presence of Doping Substances in Dietary Supplements Used in Sports. [PDF]
Nutrients, 2017 Introduction: The use of dietary supplements is increasing among athletes, year after year. Related to the high rates of use, unintentional doping occurs.
Martínez-Sanz JM +5 more
europepmc +5 more sources
Nandrolone Decanoate: Use, Abuse and Side Effects. [PDF]
Medicina (Kaunas), 2020 Background and Objectives: Androgens play a significant role in the development of male reproductive organs. The clinical use of synthetic testosterone derivatives, such as nandrolone, is focused on maximizing the anabolic effects and minimizing the ...
Patanè FG +10 more
europepmc +3 more sources
Effects of structural characteristics of (un)conjugated steroid metabolites in their collision cross section value [PDF]
, 2023 In this work, the collision cross section (CCS) value of 103 steroids (including unconjugated metabolites and phase II metabolites conjugated with sulfate and glucuronide groups) was determined by liquid chromatography coupled to traveling wave ion ...
Alechaga Silva, Élida +5 more
core +1 more source