Endothelin 1–Dependent Neurovascular Dysfunction in Chronic Intermittent Hypoxia
نویسندگان
چکیده
منابع مشابه
Endothelin 1-dependent neurovascular dysfunction in chronic intermittent hypoxia.
Obstructive sleep apnea, a condition resulting in chronic intermittent hypoxia (CIH), is an independent risk factor for stroke and dementia, but the mechanisms of the effect are unknown. We tested the hypothesis that CIH increases cerebrovascular risk by altering critical mechanisms regulating cerebral blood flow thereby lowering cerebrovascular reserves. Male C57Bl6/J mice were subjected to CI...
متن کاملEndothelin‐1 and ET receptors impair left ventricular function by mediated coronary arteries dysfunction in chronic intermittent hypoxia rats
Obstructive sleep apnea (OSA) results in cardiac dysfunction and vascular endothelium injury. Chronic intermittent hypoxia (CIH), the main characteristic of OSAS, is considered to be mainly responsible for cardiovascular system impairment. This study is aimed to evaluate the role of endothelin-1(ET-1) system in coronary injury and cardiac dysfunction in CIH rats. In our study, Sprague-Dawley ra...
متن کاملAugmented endothelin vasoconstriction in intermittent hypoxia-induced hypertension.
We reported previously that simulating sleep apnea in rats by exposing them 7 hours per day to intermittent hypoxia/hypercapnia (IH) elevates plasma endothelin-1 and causes hypertension, which is reversed by an endothelin-1 antagonist. We hypothesized that in this model of sleep apnea-induced hypertension, vascular sensitivity to endothelin-1 is increased in combination with the elevated plasma...
متن کاملRole of endothelin in intermittent hypoxia-induced hypertension.
Clinical studies suggest that sleep apnea causes systemic hypertension. In addition, patients with sleep apnea have elevated plasma levels of endothelin-1 (ET-1). We hypothesized that the intermittent hypoxia/hypercapnia (IH) associated with sleep apnea causes hypertension by increasing ET-1 production. To test this hypothesis, rats with arterial and venous catheters were placed in Plexiglas ch...
متن کاملChronic and intermittent hypoxia induce different degrees of myocardial tolerance to hypoxia-induced dysfunction.
Chronic hypoxia (CH) is believed to induce myocardial protection, but this is in contrast with clinical evidence. Here, we test the hypothesis that repeated brief reoxygenation episodes during prolonged CH improve myocardial tolerance to hypoxia-induced dysfunction. Male 5-week-old Sprague-Dawley rats (n = 7-9/group) were exposed for 2 weeks to CH (F(I)O(2) = 0.10), intermittent hypoxia (IH, sa...
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ژورنال
عنوان ژورنال: Hypertension
سال: 2012
ISSN: 0194-911X,1524-4563
DOI: 10.1161/hypertensionaha.112.193672