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Csilla Ari, Angela M Poff, Heather E Held, Carol S Landon, Craig R Goldhagen, Nicholas Mavromates, Dominic P D'Agostino
Amyotrophic Lateral Sclerosis (ALS), also known as Lou Gehrig's disease, is a neurodegenerative disorder of motor neurons causing progressive muscle weakness, paralysis, and eventual death from respiratory failure. There is currently no cure or effective treatment for ALS. Besides motor neuron degeneration, ALS is associated with impaired energy metabolism, which is pathophysiologically linked to mitochondrial dysfunction and glutamate excitotoxicity. The Deanna Protocol (DP) is a metabolic therapy that has been reported to alleviate symptoms in patients with ALS...
2014: PloS One
Jennifer M A Tullet, Caroline Araiz, Matthew J Sanders, Catherine Au, Alexandre Benedetto, Irene Papatheodorou, Emily Clark, Kathrin Schmeisser, Daniel Jones, Eugene F Schuster, Janet M Thornton, David Gems
The DAF-16/FoxO transcription factor controls growth, metabolism and aging in Caenorhabditis elegans. The large number of genes that it regulates has been an obstacle to understanding its function. However, recent analysis of transcript and chromatin profiling implies that DAF-16 regulates relatively few genes directly, and that many of these encode other regulatory proteins. We have investigated the regulation by DAF-16 of genes encoding the AMP-activated protein kinase (AMPK), which has α, β and γ subunits...
February 2014: PLoS Genetics
Benjamin Wax, Andreas N Kavazis, Heather E Webb, Stanley P Brown
BACKGROUND: Dietary supplements containing L-arginine are marketed to improve exercise performance, but the efficacy of such supplements is not clear. Therefore, this study examined the efficacy of acute ingestion of L-arginine alpha-ketoglutarate (AAKG) muscular strength and endurance in resistance trained and untrained men. METHODS: Eight resistance trained and eight untrained healthy males ingested either 3000mg of AAKG or a placebo 45 minutes prior to a resistance exercise protocol in a randomized, double-blind crossover design...
2012: Journal of the International Society of Sports Nutrition
Darryn S Willoughby, Tony Boucher, Jeremy Reid, Garson Skelton, Mandy Clark
BACKGROUND: Arginine-alpha-ketoglutarate (AAKG) supplements are alleged to increase nitric oxide production, thereby resulting in vasodilation during resistance exercise. This study sought to determine the effects of AAKG supplementation on hemodynamics and brachial-artery blood flow and the circulating levels of L-arginine, nitric oxide metabolites (NOx; nitrate/nitrite), asymmetric dimethyl arginine (ADMA), and L-arginine:ADMA ratio after resistance exercise. METHODS: Twenty-four physically active men underwent 7 days of AAKG supplementation with 12 g/day of either NO(2) Platinum or placebo (PLC)...
August 2011: International Journal of Sport Nutrition and Exercise Metabolism
Beau K Greer, Brett T Jones
Dietary supplement companies claim that arginine supplements acutely enhance skeletal muscular endurance. The purpose of this study was to determine whether acute arginine α-ketoglutarate supplementation (AAKG) will affect local muscle endurance of the arm and shoulder girdle or the blood pressure (BP) response to anaerobic exercise. Twelve trained college-aged men (22.6 ± 3.8 years) performed 2 trials of exercise separated by at least 1 week. At 4 hours before, and 30 minutes before exercise, a serving of an AAKG supplement (3,700 mg arginine alpha-ketoglutarate per serving) or placebo was administered...
July 2011: Journal of Strength and Conditioning Research
Bobby L LaRue, Pamela A Padilla
BACKGROUND: Preconditioning environments or therapeutics, to suppress the cellular damage associated with severe oxygen deprivation, is of interest to our understanding of diseases associated with oxygen deprivation. Wildtype C. elegans exposed to anoxia enter into a state of suspended animation in which energy-requiring processes reversibly arrest. C. elegans at all developmental stages survive 24-hours of anoxia exposure however, the ability of adult hermaphrodites to survive three days of anoxia significantly decreases...
February 3, 2011: PloS One
J M Prosser, N Majlesi, G M Chan, D Olsen, R S Hoffman, L S Nelson
The athletic performance supplement industry is a multibillion-dollar business and one popular category claims to increase nitric oxide (NO) production. We report three patients presenting to the emergency department with adverse effects. A 33-year-old man presented with palpitations, dizziness, vomiting, and syncope, after the use of NO(2) platinum. His examination and electrocardiogram (ECG) were normal. The dizziness persisted, requiring admission overnight. A 21-year-old man with palpitations and near syncope had used a "nitric oxide" supplement...
May 2009: Human & Experimental Toxicology
Bill Campbell, Mike Roberts, Chad Kerksick, Colin Wilborn, Brandon Marcello, Lem Taylor, Erika Nassar, Brian Leutholtz, Rodney Bowden, Chris Rasmussen, Mike Greenwood, Richard Kreider
OBJECTIVE: We evaluated the pharmacokinetics, safety, and efficacy of l-arginine alpha-ketoglutarate (AAKG) in trained adult men. METHODS: Subjects participated in two studies that employed a randomized, double-blind, controlled design. In study 1, 10 healthy men (30-50 y old) fasted for 8 h and then ingested 4 g of time-released or non-timed-released AAKG. Blood samples were taken for 8 h after AAKG ingestion to assess the pharmacokinetic profile of L-arginine...
September 2006: Nutrition
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