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March 1, 1990Circulation ResearchOpen Access

Role of oxygen-derived free radicals in acute angiotensin II--induced hypertensive vascular disease in the rat.

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Randomized trial investigates role of free radicals in vascular damage during hypertension, suggesting important implications for treatment.

This research aims to determine the role of oxygen-derived free radicals in acute angiotensin II-induced hypertensive vascular disease.
Rats were infused with angiotensin II to induce acute hypertension.
Free radical scavengers, including SOD, catalase, and DMSO, were administered to assess their effects on vascular damage.
Vascular lesions and permeability changes were quantified using stereomicroscopy, light and transmission electron microscopy.
Scavenger treatment did not significantly affect vascular constriction patterns or blood pressure.
Electron microscopy showed untreated hypertensive rats had more severe endothelial and smooth muscle lesions compared to scavenger-treated groups.
Smooth muscle necrosis was reduced by approximately equal amounts in scavenger-treated hypertensive groups (p < 0.01).

S. K. Wilson (1990) studied this question.

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Randomized trial investigates role of free radicals in vascular damage during hypertension, suggesting important implications for treatment.