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Pathology of small blood vessel disease in hypertension
Insights
Arteriolar lesions like hyaline arteriolosclerosis are linked to hypertension. Understanding the extracellular matrix
Area of Science:
- Cardiovascular Research
- Nephrology
- Pathology
Background:
- The pathogenic role of arterioles in hypertension has been long suspected.
- Anatomical changes in renal arterioles, including arteriolonecrosis, myointimal hyperplasia, and hyaline arteriolosclerosis, are established correlates of hypertension.
Purpose of the Study:
- To discuss the pathogenesis of arteriolar lesions in hypertension.
- To explore the contribution of these lesions to the perpetuation of hypertension.
- To examine the role of the extracellular matrix in hyaline arteriolosclerosis and its relation to hemodynamic factors.
Main Methods:
- Review of existing literature on arteriolar pathology in hypertension.
- Correlation of extracellular matrix dynamics with hemodynamic and pathophysiologic consequences of elevated transmural pressure.
Main Results:
- Hyaline arteriolosclerosis development is significantly influenced by the extracellular matrix.
- Increased transmural pressure in hypertension exacerbates arteriolar damage through pathophysiologic mechanisms.
- Arteriolar lesions contribute to the self-perpetuation of hypertension.
Conclusions:
- Arteriolar disease is a key component in the pathophysiology of hypertension.
- Therapeutic strategies targeting arteriolar pathology may offer a means to manage or reverse hypertensive damage.
Abstract:
A pathogenic role for arterioles in hypertension has been postulated for many decades. Renal arteriolonecrosis, myointimal hyperplasia, and hyaline arteriolosclerosis are anatomic correlates of hypertension. The pathogenesis of these lesions is discussed as is contribution of these lesions to the perpetuation of hypertension. The importance of the extracellular matrix in the initiation and development of hyaline arteriolosclerosis is presented and correlated with the hemodynamic and pathophysiologic consequences of increased transmural pressure. The possibility of aiming therapy at arresting or ameliorating arteriolar disease is presented.