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The impact of angiotensin converting enzyme inhibitors on the arterial wall
1Department of Clinical Pharmacology, Ninewells Hospital and Medical School, Dundee, UK.
Insights
Angiotensin converting enzyme (ACE) inhibitors show potential in reducing arterial damage from cardiovascular risk factors. Further research is needed, but these drugs may help lower cardiovascular mortality and morbidity.
Area of Science:
- Cardiovascular Medicine
- Pharmacology
Background:
- Cardiovascular risk factors like hypertension and hyperlipidaemia can damage arterial walls.
- Angiotensin converting enzyme inhibitors (ACE inhibitors) are known for blood pressure reduction.
- Debate exists on whether ACE inhibitors offer additional benefits to arterial structure and function beyond traditional antihypertensives.
Purpose of the Study:
- To explore the potential of ACE inhibitors in mitigating arterial damage caused by cardiovascular risk factors.
- To investigate the mechanisms by which ACE inhibitors might protect the arterial wall.
- To assess the potential excess benefit of ACE inhibitors over other antihypertensive drugs.
Main Methods:
- Review of existing evidence on ACE inhibitors and arterial health.
- Examination of animal models demonstrating ACE inhibition's effect on hyperlipidaemia-induced arterial damage.
- Analysis of the biochemical pathways affected by ACE inhibitors, including angiotensin II and bradykinin.
Main Results:
- ACE inhibitors may reduce arterial damage linked to hypertension, hyperlipidaemia, and ageing.
- Evidence suggests ACE inhibition is effective in reducing experimental hyperlipidaemia-induced arterial damage in animal models.
- ACE inhibitors impact both the renin-angiotensin system and bradykinin metabolism, offering potential protective mechanisms.
Conclusions:
- ACE inhibitors possess mechanisms that could suppress intimal hypertrophy and prevent endothelial dysfunction, key precursors to arteriosclerosis.
- While further research into mechanisms is required, ACE inhibitors show significant promise in reducing cardiovascular mortality and morbidity.
- These drugs are particularly relevant for high-risk cardiovascular patient groups.
Abstract:
There is recent interest in the possibility that angiotensin converting enzyme inhibitors (ACE inhibitors) may reduce the damage inflicted on the arterial wall by common cardiovascular risk factors such as hypertension, hyperlipidaemia and ageing. The efficacy of these drugs in blood pressure reduction is accepted, but whether there is an excess benefit on arterial structure and function, conferred by use of ACE inhibitors over more traditional antihypertensives, is still under debate. There is also evidence in animal models to suggest that ACE inhibition is effective in reduction of arterial damage due to experimental hyperlipidaemia. ACE inhibitors not only reduce the conversion of angiotensin I and angiotensin II, which can interact with the sympathetic nervous system, but also prevent the degradation of bradykinin. This means that ACE inhibitors have several potential mechanisms through which they could suppress intimal hypertrophy and prevent endothelial dysfunction, which is believed to precede arteriosclerosis in man. Although much further work is needed to clarify the mechanism underlying the beneficial effects on the arterial wall of this group of drugs, they do appear to have significant potential in the effort to reduce cardiovascular mortality and morbidity, especially in high risk groups.