PMID: 7009527Jan 1, 1981Paper

Control of exercise-induced muscular glycogenolysis by adrenal medullary hormones in rats

Journal of Applied Physiology: Respiratory, Environmental and Exercise Physiology
E A RichterN J Christensen

Abstract

We have previously shown that adrenodemedullation combined with chemical sympathectomy decreases the exercise-induced muscular glycogen breakdown in rats. Now we have elucidated to what extent the effect of combined adrenodemedullation and sympathectomy can be ascribed to the lack of either the adrenal medulla or of the peripheral sympathetic nerve endings. Rats were either adrenodemedullated or underwent sham operation and subsequent unilateral hindleg sympathectomy. Three weeks after adrenodemedullation and 1 wk after sympathectomy, the rats either rested or swam with a tail weight for 75 min or continued swimming to exhaustion. The exercise-induced muscular glycogenolysis was markedly impeded by adrenodemedullation but not by sympathectomy. During the first 75 min of exercise, hepatic glycogenolysis was decreased in adrenodemedullated rats compared with sham-operated rats, and blood glucose only increased in the latter. At exhaustion, plasma insulin and glucagon were higher and lower, respectively, in adrenodemedullated rats than in sham-operated rats, whereas blood glucose did not differ significantly between these groups. During prolonged swimming in rats, adrenomedullary hormones enhance muscular glycogenolysis, glucagon ...Continue Reading

Citations

Aug 24, 1999·The Journal of Physiology·K HowlettM Kjaer
Nov 22, 2001·Journal of Applied Physiology·J J HamannL B Gladden
Jun 24, 2004·International Journal of Obesity and Related Metabolic Disorders : Journal of the International Association for the Study of Obesity·K CouturierR Favier
Jan 1, 1983·Acta Medica Scandinavica. Supplementum·A Juhlin-Dannfelt
Jan 1, 1984·European Journal of Applied Physiology and Occupational Physiology·E A RichterH Galbo
Jan 1, 1983·European Journal of Applied Physiology and Occupational Physiology·J M LavoieP J Provencher
Feb 26, 1998·Journal of Applied Physiology·M A FebbraioM Hargreaves
Jan 1, 1982·The American Journal of Physiology·E A RichterH Galbo
Jun 1, 1991·The American Journal of Physiology·D H Wasserman, A D Cherrington
Aug 11, 1984·The American Journal of Physiology·M VranicH L Lickley
Oct 1, 1988·The American Journal of Physiology·J M MoatesD H Wasserman
Dec 1, 1990·Physiology & Behavior·A J Scheurink, A B Steffens

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