The effect of acute metabolic acidosis on plasma cortisol, renin activity and aldosterone

Hormone Research
G O PerezC A Vaamonde


The effect of metabolic acidosis on the renin-aldosterone system remains unclear. In the present study anesthetized mongrel dogs (n = 19) were infused at similar rates with 0.45% NaCl (controls), HCl or NH4Cl (2.5mEq/kg) for 1--3 h. The induced metabolic acidosis in the two experimental groups was not associated with increases in plasma renin activity. Plasma cortisol (as a marker for ACTH secretion) and serum potassium concentration increased in both HCl- and NH4Cl-treated animals. Plasma aldosterone increased after 30 min in the HCl group and 60 min in the NH4Cl group and did not change in controls. These findings demonstrate that metabolic acidosis induced by HCl or NH4Cl is associated with increased aldosterone production without concomitant changes in plasma renin activity.


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Related Concepts

Metabolic Acidosis
Aldosterone, (+-)-Isomer
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Canis familiaris
Hydrocortisone, (9 beta,10 alpha,11 alpha)-Isomer
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