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Title: Thermogenic effects of various beta-adrenoceptor agonists in humans: their potential usefulness in the treatment of obesity. Author: Jéquier E, Munger R, Felber JP. Journal: Am J Clin Nutr; 1992 Jan; 55(1 Suppl):249S-251S. PubMed ID: 1345888. Abstract: The thermogenic effect of various beta-agonists was studied in humans by using indirect calorimetry. Epinephrine was found to be markedly thermogenic: at infusion rates of 0.01, 0.03, and 0.1 microgram.min-1.kg fat-free mass-1 resting energy expenditure (REE) increased by 8%, 16%, and 29%, respectively; in addition, a dose-dependent increase in heart rate was observed. Dopamine at high infusion rates also induces beta-agonist effects: at 5 and 10 micrograms.min-1.kg-1, REE increased by 6% and 15%, respectively, an effect that could be mediated by the release of endogenous norepinephrine. The phenethanolamine derivative Ro 16-8714 given per os at a single dose of 5 and 20 mg led to an increase of REE of 10% and 21%, whereas heart rate was enhanced by 8% and 49%, respectively. The new beta-adrenoreceptor agonist Ro 40-2148, given per os to six normal-weight young subjects at a single dose of 200 or 400 mg, induced no significant change in REE, whereas after 800 mg, REE was increased in all subjects (+3 to +17%, mean + 8%) without inducing tachycardia.[Abstract] [Full Text] [Related] [New Search]