Key result
Captopril increased renin secretion in conscious rats via sympathetic activation and interruption of the ANG II short feedback loop, without prostaglandin involvement.
Why the study?
Does captopril increase renin release via prostaglandins, beta-adrenergic activation, or angiotensin II feedback in conscious rats?
Population
Conscious rats
Comparison
Captopril in drinking water for 5 days, with or… vs Controls
Design
Preclinical
Follow-up
5 days
Authors
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Cautions against extrapolating rat mechanisms to patients; leaves open confirmation of sympathetic and ANG II pathways in human ACE inhibitor responses.
Does captopril increase renin release via prostaglandins, beta-adrenergic activation, or angiotensin II feedback in conscious rats?
p-value: p=<0.05
Captopril-induced renin release in rats is mediated by sympathetic activation and interruption of ANG II feedback, rather than prostaglandin pathways.
Schiffrin et al. (1981) studied this question. Captopril vs. Controls was evaluated on Plasma renin activity (PRA) (p=<0.05). Captopril increased renin secretion in conscious rats via sympathetic activation and interruption of the ANG II short feedback loop, without prostaglandin involvement.
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