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Breidert, M.* ; Bornstein, S.R.* ; Ehrhart-Bornstein, M.* ; Scherbaum, W.A.* ; Holst, J.J.*

Angiotensin II regulates both adrenocortical and adrenomedullary function in isolated perfused pig adrenals.

Peptides 17, 287-292 (1996)

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The effect of angiotensin II (ANG II) on all four zones of the adrenal gland was studied in preparations of isolated perfused porcine adrenals. The experimental design offered the possibility to analyze directly the actions of ANG II while preserving the structure of the gland. ANG II stimulated aldosterone, cortisol, and androstenedione release in a dose-dependent manner. At a final ANG II concentration of 10(-8) M aldosterone increased from 0.7 +/- 0.05 to 3.4 +/- 0.9 ng/ml, cortisol from 50 +/- 5 to 430 +/- 60 micrograms/l, and androstenedione from 1.4 +/- 0.2 to 4.4 +/- 0.8 ng/ml. In addition, ANG II provoked a release of adrenaline from 4.1 +/- 0.6 to 27.5 +/- 0.5 micrograms/ml and of noradrenaline from 5.5 +/- 1.1 to 36.0 +/- 8.7 micrograms/ml. Our results show that secretion of both adrenocortical steroids and adrenomedullary catecholamines can be evoked by ANG II. ANG II seems to influence not only the function of the zona glomerulosa but the function of the entire adrenal gland.

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