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Effect Of Chronic Intermittent Hypoxia On Angiotensin Ii Receptors In The Central Nervous System., Barbara J Morgan, Nicole Schrimpf, Morgan Rothman, Ann Mitzey, Mark S Brownfield, Robert Charles Speth, John M Dopp

Faculty Articles

Chronic intermittent hypoxia (CIH) increases basal sympathetic nervous system activity, augments chemoreflex-induced sympathoexcitation, and raises blood pressure. All effects are attenuated by systemic or intracerebroventricular administration of angiotensin II type 1 receptor (AT₁R) antagonists. This study aimed to quantify the effects of CIH on AT₁R- and AT₂R-like immunoreactivity in the rostroventrolateral medulla (RVLM) and paraventricular nucleus of the hypothalamus (PVN), central regions that are important components of the extended chemoreflex pathway. Eighteen Sprague-Dawley rats were exposed to intermittent hypoxia (F_IO₂ = 0.10, 1 min at 4-min intervals) for 10 hr/day for …