Effects of Dietary Clenbuterol on Metabolism of the Hindquarters in Steers

摘要: The objective of this study was to measure acute (d 1) and chronic 9) effects dietary clenbuterol on heart rate, blood flow, oxygen uptake, net uptake/release metabolites in the hindquarters growing steers. design a single reversal with two 9-d periods control or 8 mg clenbuterol/d 5 d between periods. Within 2 h initial consumption 1), rate flow doubled arterial plasma concentrations glucose, L-lactate nonesterified fatty acid (NEFA) increased, whereas alpha-NH2 N NH3 decreased, demonstrating an response. Uptake increased uptake decreased. Net release both NEFA increased. On 9, there were no responses consumption; however, concentration remained chronically elevated, acetate propionate decreased compared feeding. N, by 9 Changes arteriovenous (AV) difference contributed changes uptake/release. metabolic consistent retention through protein synthesis, use reliance for cellular energy. In conclusion, data show that perturbation homeostatic regulation 1 evolved establishment homeorhetic is skeletal accretion