Yajima M, Hosokawa T, Ui M. An involvement of alpha-adrenergic stimulation in exercise-induced hypoglycemia.
Eur J Pharmacol 1977;
42:1-9. [PMID:
191260 DOI:
10.1016/0014-2999(77)90184-4]
[Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Hypoglycemia developed in fasted rats during forced swimming. This hypoglycemia was mostly abolished by phentolamine, an alpha-adrenolytic agent, or by hexamethonium; was potentiated by propranolol, a beta-adrenolytic agent, of by 5-methoxyindole-2-carboxylic acid, a gluconeogenic inhibitor; and was not affected by anti-insulin serum. The turnover rate of blood glucose estimated from the decay curve of blood [14C]glucose increased significantly during exercise. There was a slight but significantly increase during exercise in the transfer of 3-O-methyl-[14C]glucose into muscle and adipose tissues, when it was corrected for by [3H]mannitol transfer to the same tissues. It is concluded that the alpha-receptor-mediated action of endogenous catecholamine stimulates peripheral glucose utilization leading to hypoglycemia during exercise. The action of alpha- and beta-adrenergic mechanisms, directly on peripheral tissues or via insulin secretion, in fine regulation of blood glucose level is discussed.
Collapse