Suppression of plasma ACTH concentration by angiotensin II infusion in normal humans and in a subject with a steroid 17 alpha-hydroxylase defect.

Abstract:

:Six healthy subjects were infused with angiotensin II and plasma concentrations of angiotensin, ACTH and cortisol were measured before, during and after the infusion. In all cases the plasma ACTH concentration fell as plasma angiotensin increased and rose again, sometimes to higher than basal levels, when the angiotensin infusion was terminated. These effects were most marked at the highest rate of infusion (8 pmol/kg/min) and, at the lower rates (2 and 4 pmol/kg/min), there was some recovery of ACTH levels during the infusion period in some subjects. Plasma ACTH concentrations also fell when angiotensin was infused into a patient with high ACTH levels due to a steroid 17 alpha-hydroxylation defect. The inhibition of ACTH secretion is not due to a rise in plasma cortisol operating a negative feedback inhibition. It could be a direct effect of the infused angiotensin on the brain-hypothalamus-pituitary complex or an effect on the metabolism of ACTH.

journal_name

Clin Endocrinol (Oxf)

journal_title

Clinical endocrinology

authors

Semple PF,Buckingham JC,Mason PA,Fraser R

doi

10.1111/j.1365-2265.1979.tb01359.x

subject

Has Abstract

pub_date

1979-02-01 00:00:00

pages

137-44

issue

2

eissn

0300-0664

issn

1365-2265

journal_volume

10

pub_type

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