Key result
Subcutaneous capsaicin decreased urinary flow and sodium excretion by 30% to 40% in Wistar rats, a response blocked by intracerebroventricular losartan but absent in spontaneously hypertensive rats.
Population
Anesthetized normotensive Wistar rats and stroke-prone spontaneously hypertensive rats (SHRSP)
Comparison
Subcutaneous capsaicin stimulation with or… vs Baseline responses without…
Design
Preclinical
Authors
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No immediate clinical implications; leaves open central angiotensin II role in hypertension-related renal reflexes.
Brain angiotensin II is essential for the somatorenal reflex causing antidiuresis and antinatriuresis in normotensive rats, but this endogenous mechanism is impaired in stroke-prone spontaneously hypertensive rats.
Huang et al. (2001) studied Hypertension. Intracerebroventricular losartan and subcutaneous capsaicin vs. Baseline / Wistar vs SHRSP was evaluated on Blood pressure, urinary flow, and sodium excretion. Subcutaneous capsaicin decreased urinary flow and sodium excretion by 30% to 40% in Wistar rats, a response blocked by intracerebroventricular losartan but absent in spontaneously hypertensive rats.
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