Insulin Release during Alpha-Adrenergic Receptor Blockade: Primacy of the Glycemic Stimulus
Abstract
Insulin release during alpha-adrenergic receptor blockade in a variety of experimental animals has raised the possibility of a direct effect of alpha-blockade on insulin secretion. However, in 7 unanesthetized baboons, an increase in the serum insulin concentration during phentolamine-induce alpha- adrenergic receptor blockade occurred only in hyperglycemic animals and the magnitude of the increase in serum insulin was significantly correlated with the serum glucose concentration immediately prior to phentolamine. These findings are consistent with observations showing no effect of alpha-adrenergic inhibitors on basal insulin concentration in (normoglycemic) man and indicate that insulin secretion during alpha-adrenergic receptor blockade occurs only in the presence of an appropriate glycemic stimulus.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 22, 1971
- Accession Number
- AD0740955
Entities
People
- Clifford M. Herman
- Jonas Sode
- Philip E. Cryer
Organizations
- Naval Medical Research Center