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LGD-4033

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https://www.readbyqxmd.com/read/29183075/chemical-composition-and-labeling-of-substances-marketed-as-selective-androgen-receptor-modulators-and-sold-via-the-internet
#1
Ryan M Van Wagoner, Amy Eichner, Shalender Bhasin, Patricia A Deuster, Daniel Eichner
Importance: Recent reports have described the increasing use of nonsteroidal selective androgen receptor modulators, which have not been approved by the US Food and Drug Administration (FDA), to enhance appearance and performance. The composition and purity of such products is not known. Objective: To determine the chemical identity and the amounts of ingredients in dietary supplements and products marketed and sold through the internet as selective androgen receptor modulators and compare the analyzed contents with product labels...
November 28, 2017: JAMA: the Journal of the American Medical Association
https://www.readbyqxmd.com/read/28137616/detection-of-sarms-in-doping-control-analysis
#2
Mario Thevis, Wilhelm Schänzer
The class of selective androgen receptor modulators (SARMs) has been the subject of intense and dedicated clinical research over the past two decades. Potential therapeutic applications of SARMs are manifold and focus particularly on the treatment of conditions manifesting in muscle loss such as general sarcopenia, cancer-associated cachexia, muscular dystrophy, etc. Consequently, based on the substantial muscle- and bone-anabolic properties of SARMs, these agents constitute substances with significant potential for misuse in sport and have therefore been added to the Word Anti-Doping Agency's (WADA's) Prohibited List in 2008...
January 27, 2017: Molecular and Cellular Endocrinology
https://www.readbyqxmd.com/read/26044265/characterization-of-a-non-approved-selective-androgen-receptor-modulator-drug-candidate-sold-via-the-internet-and-identification-of-in-vitro-generated-phase-i-metabolites-for-human-sports-drug-testing
#3
Mario Thevis, Andreas Lagojda, Dirk Kuehne, Andreas Thomas, Josef Dib, Annelie Hansson, Mikael Hedeland, Ulf Bondesson, Tina Wigger, Uwe Karst, Wilhelm Schänzer
RATIONALE: Potentially performance-enhancing agents, particularly anabolic agents, are advertised and distributed by Internet-based suppliers to a substantial extent. Among these anabolic agents, a substance referred to as LGD-4033 has been made available, comprising the core structure of a class of selective androgen receptor modulators (SARMs). METHODS: In order to provide comprehensive analytical data for doping controls, the substance was obtained and characterized by nuclear magnetic resonance spectroscopy (NMR) and liquid chromatography/electrospray ionization high resolution/high accuracy tandem mass spectrometry (LC/ESI-HRMS)...
June 15, 2015: Rapid Communications in Mass Spectrometry: RCM
https://www.readbyqxmd.com/read/25168622/identification-of-black-market-products-and-potential-doping-agents-in-germany-2010-2013
#4
Oliver Krug, Andreas Thomas, Katja Walpurgis, Thomas Piper, Gerd Sigmund, Wilhelm Schänzer, Tim Laussmann, Mario Thevis
PURPOSE: The desire to increase the athletic performance, to 'optimize' an individual's appearance, and to complement but also to arguably substitute exercise by means of drugs and drug candidates has generated a considerable (illicit) market for compounds such as anabolic-androgenic steroids, stimulants, growth promoting peptide hormones, and so on. Genuinely developed for therapeutic use, their abuse/misuse generates enormous health risks, which has necessitated comprehensive controls of compound trafficking by customs and anti-doping authorities...
November 2014: European Journal of Clinical Pharmacology
https://www.readbyqxmd.com/read/24189892/selective-androgen-receptor-modulators-for-the-prevention-and-treatment-of-muscle-wasting-associated-with-cancer
#5
REVIEW
James T Dalton, Ryan P Taylor, Michael L Mohler, Mitchell S Steiner
PURPOSE OF REVIEW: This review highlights selective androgen receptor modulators (SARMs) as emerging agents in late-stage clinical development for the prevention and treatment of muscle wasting associated with cancer. RECENT FINDINGS: Muscle wasting, including a loss of skeletal muscle, is a cancer-related symptom that begins early in the progression of cancer and affects a patient's quality of life, ability to tolerate chemotherapy, and survival. SARMs increase muscle mass and improve physical function in healthy and diseased individuals, and potentially may provide a new therapy for muscle wasting and cancer cachexia...
December 2013: Current Opinion in Supportive and Palliative Care
https://www.readbyqxmd.com/read/22459616/the-safety-pharmacokinetics-and-effects-of-lgd-4033-a-novel-nonsteroidal-oral-selective-androgen-receptor-modulator-in-healthy-young-men
#6
RANDOMIZED CONTROLLED TRIAL
Shehzad Basaria, Lauren Collins, E Lichar Dillon, Katie Orwoll, Thomas W Storer, Renee Miciek, Jagadish Ulloor, Anqi Zhang, Richard Eder, Heather Zientek, Gilad Gordon, Syed Kazmi, Melinda Sheffield-Moore, Shalender Bhasin
BACKGROUND: Concerns about potential adverse effects of testosterone on prostate have motivated the development of selective androgen receptor modulators that display tissue-selective activation of androgenic signaling. LGD-4033, a novel nonsteroidal, oral selective androgen receptor modulator, binds androgen receptor with high affinity and selectivity. Objectives. To evaluate the safety, tolerability, pharmacokinetics, and effects of ascending doses of LGD-4033 administered daily for 21 days on lean body mass, muscle strength, stair-climbing power, and sex hormones...
January 2013: Journals of Gerontology. Series A, Biological Sciences and Medical Sciences
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