Effect of Corticotropin on Aldosterone Excretion and Plasma Renin in Normal Subjects, in Essential Hypertension and in Primary Aldosteronism
1968
ABSTRACT Administration of a large dose of ACTH caused an acute increase in aldosterone excretion in normal subjects, in cases of uncomplicated essential hypertension and in primary aldosteronism. Plasma renin levels were unaltered. The continued administration of ACTH for several days led to a fall in aldosterone excretion to below the control value in most cases, even when the subjects were maintained on a low salt diet. On the day after ceasing ACTH treatment, aldosterone transiently fell to even lower levels, which were also inappropriate to the low sodium intake. These various changes in aldosterone excretion produced by ACTH administration cannot be explained by any concurrent changes in activity of the renin-angiotensin system. The data also suggest that any changes in electrolyte metabolism induced by ACTH are only a minor influence in causing the depression in aldosterone secretion which follows its initial rise. This second part of the biphasic response therefore appears to result from a direct ...
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