Effect of catecholamine on aldosterone release in isolated rat glomerulosa cell suspensions |
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| Authors: | T Horiuchi K Tanaka N Shimizu |
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| Affiliation: | 1. Western College of Veterinary Medicine, University of Saskatchewan, 52 Campus Dr., Saskatoon, S7N 5B4, Canada;2. College of Agriculture and Bioresources, University of Saskatchewan, Saskatoon, Canada;3. Department of Agricultural, Food and Nutritional Science, University of Alberta, Edmonton, Canada;4. Department of Animal Sciences, Purdue University, West Lafayette, United States of America. |
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| Abstract: | Effect of adrenergic activity on the adrenal steroidogenesis and the modulation by catecholamines of aldosterone release were studied in isolated rat adrenal cell suspensions. Isoproterenol, norepinephrine and epinephrine, but not dopamine, caused statistically significant increase in aldosterone release. Both prazosin (alpha 1 antagonist) and yohimbine (alpha 2 antagonist) suppressed the norepinephrine-induced aldosterone release in a dose dependent manner, respectively. Both atenolol (beta 1 antagonist) and ICI 118-551 (beta 2 antagonist) also blocked (-)-isoproterenol-induced aldosterone release in a dose dependent manner, respectively. Neither (-)-isoproterenol nor (+/-)-norepinephrine at concentrations of 10(-6) M potentiated aldosterone release stimulated by angiotensin II or ACTH. These results suggest that catecholamines stimulate aldosteroidogenesis, but it appears unlikely that aldosterone release induced by ACTH or angiotensin-II is modulated by adrenergic stimulation. |
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