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[Role of hypertension in atherosclerosis]
M Takahashi1, U Ikeda, K Shimada
1Department of cardiology, Jichi Medical School.
Insights
Hypertension contributes to atherosclerosis through mechanical stress and vasoactive substances, impacting arterial cells. This suggests hypertension and atherosclerosis may share a common underlying cause, despite blood pressure control.
Area of Science:
- Cardiovascular Science
- Cell Biology
- Hypertension Research
Context:
- Hypertension frequently leads to cardiovascular complications from atherosclerosis.
- Blood pressure control in hypertensive patients does not always reduce cardiovascular complications.
- Understanding the link between hypertension and atherosclerosis is crucial for cardiovascular health.
Purpose:
- To explore the mechanisms by which hypertension influences atherogenesis.
- To investigate the role of mechanical stress and vasoactive substances in hypertension-induced arterial changes.
- To determine if hypertension and atherosclerosis share a common underlying cause.
Summary:
- Hypertension impacts atherogenesis via mechanical stress on arterial wall cells (endothelial, smooth muscle) and vasoactive substances (angiotensin, endothelin) promoting smooth muscle cell proliferation.
- These factors induce tropic changes in smooth muscle cells, potentially reflecting shared cellular reactivity with atherosclerosis.
- The study proposes that hypertension and atherosclerosis might be manifestations of a single underlying cause.
Impact:
- Provides insights into the complex relationship between hypertension and atherosclerosis.
- Highlights potential shared etiological factors for these two conditions.
- May inform future research directions for preventing and treating cardiovascular diseases associated with hypertension.
Abstract:
Hypertension is frequently associated with clinical cardiovascular complications due to atherosclerosis. However, several previous studies have showed that incidence of cardiovascular complication due to atherosclerosis hypertensives do not decrease even when the blood pressure was well controlled. The effects of hypertension on atherogenesis appears to be mainly due to two factors: (1) The mechanical stress which induces the change of cell functions of arterial wall cells such as endothelial cells, smooth muscle cells and extracellular matrix, (2) Vasoactive substances, such as angiotensin and endothelin, which may plays a role for smooth muscle cell proliferation. The tropic changes in smooth muscle cells induced by above two factors in hypertension might reflect common alternations in cellular reactivity as observed in atherosclerosis. If so, hypertension and atherosclerosis could be regarded as two effects with one underlying cause.