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[Captopril in improving vascular structure and lowering blood pressure]
1Hypertension Unit, First Affiliated Hospital, Fujian Medical College, Fuzhou.
Zhonghua Yi Xue Za Zhi
|June 1, 1995
Summary
Captopril treatment in spontaneously hypertensive rats (SHRs) prevented vascular hypertrophy and improved blood vessel function, even after treatment cessation. This suggests captopril benefits vascular health independently of its blood pressure-lowering effects.
Area of Science:
- Cardiovascular Pharmacology
- Vascular Biology
- Hypertension Research
Context:
- Spontaneously hypertensive rats (SHRs) exhibit vascular structural and functional abnormalities.
- Angiotensin-converting enzyme (ACE) inhibitors like captopril are used to treat hypertension.
- The long-term effects of captopril on vascular remodeling and function in SHRs require further investigation.
Purpose:
- To investigate the effects of early-life captopril treatment on vascular structure and function in SHRs.
- To determine if captopril's vascular benefits persist after treatment withdrawal.
- To explore the potential separation of captopril's vascular effects from its hypotensive action.
Summary:
- Early-life captopril administration (20-100 mg/kg/day) in SHRs prevented vascular hypertrophy and normalized vascular responsiveness to phenylephrine, similar to normotensive WKY rats.
- These vascular improvements persisted even after captopril treatment was removed at 16 weeks of age.
- Captopril modulated vasoconstrictor responses involving nitric oxide pathways, suggesting improved endothelial cell function.
Impact:
- Captopril treatment can induce lasting improvements in vascular structure and endothelial function in SHRs.
- The vascular benefits of captopril may be independent of its acute blood pressure-lowering effects.
- These findings suggest potential clinical utility of captopril for improving vascular health in patients with resistant hypertension.