Geslachtsspecifieke bloeddruk en hersenvasculaire kenmerken bij laag-renine hypertensie

BACKGROUND:Hypertension is a leading risk factor for negative health outcomes due to end-organ effects that include small vessel disease in the brain. Low-renin hypertension is understudied at the blood pressure (BP), microvascular, and mechanistic level, and in relation to biological sex. This study examined the effects of low-renin hypertension, produced by activation of the brain renin-angiotensin system in a deoxycorticosterone acetate (DOCA) salt model.METHODS:C57BL/6J mice were treated with DOCA (or sham) and given tap H2O and H2O with 0.15 mol/L NaCl for 3 to 4 weeks followed by assessment of the microvasculature. Mean arterial pressure and BP variability were measured using radiotelemetry.RESULTS:Baseline and diurnal changes in mean arterial pressure, increases in mean arterial pressure, and BP variability during DOCA salt, were greater in male than female mice. Compared with sham treatment, endothelial function of cerebral arterioles in vivo was reduced by >70% by DOCA