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“Conversely, the hyperglycaemia which accompanies sympathetic overactivity is accompanied by reduced plasma insulin levels because adrenaline inhibits pancreatic insulin by an alpha-adrenergic mechanism.”
“The beta 2-receptor agonist (albuterol), but not alpha-receptor agonists (phenylphrine and clonidine) or beta 1-receptor agonist (dobutamine), mimicked the effect of adrenaline.”
Rinsho shinkeigaku = Clinical neurology • 1997 | View Paper
“These results demonstrate that epinephrine has a direct stimulatory effect on adrenal cortisol secretion via an alpha-adrenergic mechanism and also suggest that not only adrenocorticotropin but also epinephrine is a most important factor for the regulation of cortisol secretion.”