Hypertension, Vol 8, 317-322, Copyright © 1986 by American Heart Association
CE Hall and CE Gomez-Sanchez
The hypertensogenic effect of 18-oxocortisol, an aldosterone analogue
possessing both mineralocorticoid and glucocorticoid properties, was
studied at the same dosage but under different experimental conditions in
two experiments. Under experimental conditions conducive to the development
of mineralocorticoid hypertension (i.e., rats with a single kidney on a
high NaCl intake), there was an extremely rapid onset of saline polydipsia
and hypertension accompanied by cardiac and renal enlargement, marked
thymic involution without adrenal atrophy, cardiovascular lesions, and
hypokalemia. With the exception of the thymic changes, the same changes
occurred in rats given the biologically equivalent dose of
deoxycorticosterone acetate. Under circumstances favoring the development
of glucocorticoid hypertension (i.e., intact rats on a normal sodium
intake), the same dose had only a transient blood pressure-elevating
effect, attaining prehypertensive levels at most, and caused neither
chronic hypertension nor hypokalemia. The biologically equivalent
glucocorticoid dosage of cortisol was similarly ineffective. Under these
circumstances, both steroids caused thymus involution but only
18-oxocortisol caused kidney enlargement.
ARTICLES
Hypertensive potency of 18-oxocortisol in the rat
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