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Published on: September 26, 2018
Aldosterone: a risk factor for vascular disease
Mario Fritsch Neves1, Ernesto L Schiffrin
1Clinical Research Institute of Montreal, 110 Pine Avenue West, Montreal, Quebec, Canada H2W 1R7. schiffe@ircm.qc.ca
Insights
Aldosterone receptor antagonism offers benefits for hypertensive patients, potentially mitigating cardiovascular events. This approach addresses the aldosterone escape phenomenon, protecting vasculature from harmful effects.
Area of Science:
- Cardiovascular Medicine
- Endocrinology
- Pharmacology
Background:
- Renin-angiotensin-aldosterone system blockade with ACE inhibitors or ARBs benefits hypertension but doesn't fully control cardiovascular events.
- The aldosterone escape phenomenon may contribute to suboptimal outcomes in treated hypertensive patients.
- Aldosterone directly impacts vasculature, causing hypertrophy, dysfunction, fibrosis, and injury.
Purpose of the Study:
- To explore the role of aldosterone in cardiovascular events despite renin-angiotensin-aldosterone system blockade.
- To highlight the therapeutic potential of aldosterone receptor antagonism in managing hypertension and its vascular complications.
Main Methods:
- Review of animal models and clinical trials investigating aldosterone's effects.
- Analysis of the aldosterone escape phenomenon in patients treated with ACE inhibitors or ARBs.
Main Results:
- Aldosterone antagonism has demonstrated benefits in preclinical and clinical studies.
- Hyperaldosteronism is more prevalent in "essential" hypertension than previously recognized.
Conclusions:
- Aldosterone receptor antagonism is a promising therapeutic strategy for hypertensive patients.
- Blocking aldosterone action may protect the vasculature from detrimental effects, improving cardiovascular outcomes.
- Increased recognition of hyperaldosteronism supports wider use of aldosterone blockers.
Abstract:
Blockade of the renin-angiotensin-aldosterone system with angiotensin-converting enzyme (ACE) inhibitors or angiotensin receptor antagonists has resulted in beneficial effects in essential hypertensive patients. However, occurrence of cardiovascular events has not been appropriately controlled beyond a certain percentage. One reason could be the effects of aldosterone, the final component of the system. The aldosterone escape phenomenon could explain undesirable outcomes observed in hypertensive patients even under treatment with ACE inhibitors or angiotensin antagonists. Aldosterone has direct effects on the vasculature and has been associated with vascular smooth muscle cell hypertrophy, endothelial dysfunction, cardiac fibrosis, proteinuria, and renal vascular injury. Animal models and clinical trials have proven the benefit of aldosterone receptor antagonism. With increased recognition of the prevalence of hyperaldosteronism in patients thought to have "essential" hypertension, the use of drugs that block aldosterone action may become more widespread and protect the vasculature from the deleterious effects of aldosterone.
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