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Effects of blood pressure and glucose on endothelial function
1Cardiology and Cardiovascular Research, University Hospital, Ramistrasse 100, CH-8091 Zurich, Switzerland.
Insights
Hypertension and diabetes mellitus impair nitric oxide (NO) production, a key factor in preventing atherosclerosis. This endothelial dysfunction contributes to cardiovascular disease, highlighting the need for new preventive strategies.
Area of Science:
- Cardiovascular Science
- Endocrinology
- Vascular Biology
Background:
- Hypertension and diabetes mellitus accelerate atherosclerosis and cardiovascular disease.
- Endothelial dysfunction, specifically impaired nitric oxide (NO) bioavailability, links these conditions to cardiovascular complications.
- NO plays a crucial role in the endothelium's anti-atherosclerotic properties.
Purpose of the Study:
- To review evidence on impaired NO-mediated vasodilation in hypertension and diabetes.
- To explore mechanisms of endothelial dysfunction in these conditions.
- To identify potential new preventive strategies for cardiovascular morbidity and mortality.
Main Methods:
- Review of experimental and clinical studies.
- Analysis of data on NO bioavailability and vasodilation.
- Examination of mechanisms involving reactive oxygen species and NO inactivation.
Main Results:
- Evidence shows impaired NO-mediated vasodilation in hypertension and diabetes.
- Reduced NO bioavailability is a common pathway in endothelial dysfunction.
- Reactive oxygen species contribute to NO inactivation in these conditions.
Conclusions:
- Endothelial dysfunction, characterized by reduced NO bioavailability, is central to hypertensive and diabetic vascular disease.
- Understanding these mechanisms can lead to novel preventive strategies.
- Targeting endothelial dysfunction may reduce cardiovascular risk in patients with hypertension and diabetes.
Abstract:
Hypertension and diabetes mellitus are associated with accelerated atherosclerosis and an increased prevalence of cardiovascular disease. Loss of the modulatory role of the endothelium can be considered the link between these conditions and cardiovascular disease. Substantial evidence suggests that vasodilation mediated by endothelium-derived nitric oxide (NO) is impaired in animal models and in patients with hypertension and diabetes mellitus. NO is a principal factor involved in the anti-atherosclerotic properties of the endothelium. Therefore, the pathogenesis of hypertensive and diabetic vascular disease may involve a reduced bioavailability of endothelium-derived NO. Inactivation of NO by reactive oxygen species is an important common mechanism by which endothelial dysfunction may occur. This review summarizes experimental and clinical evidence for impaired NO-mediated vasodilation in the presence of high blood pressure and hyperglycemia. A better understanding of the mechanisms leading to endothelial dysfunction may unmask new preventive strategies to reduce cardiovascular morbidity and mortality in these conditions.