Abstract
Beta-adrenergic agonists have been shown to stimulate aldosterone secretion. Angiotensin II (AII) is one of the important stimuli of aldosterone secretion; conceivably beta-adrenergic influences affect the stimulatory potential of AII. Using cultured rat adrenal capsules, we found that 10 −7 M epinephrine and 10 −7 M isoproterenol enhanced 10 −7 M AII-stimulated aldosterone production. Propranolol (10 −7 M) completely inhibited the ability of epinephrine to augment the stimulatory actions of AII. In conclusion, beta-adrenergic agonists promote stimulation of aldosterone secretion by AII.
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