Two Opposing Functions of Angiotensin-Converting Enzyme (ACE) That Links Hypertension, Dementia, and Aging

Area of Science:

• Biochemistry
• Cardiovascular Science
• Neuroscience

Background:

• Hypertension affects over 103 million American adults.
• Angiotensin-converting enzyme (ACE) inhibitors are first-line treatments for hypertension, chronic kidney disease, and heart failure.
• ACE genetic variants show conflicting associations with Alzheimer's disease (AD) risk.

Purpose of the Study:

• To clarify the dual roles of ACE in health and disease.
• To explore the opposing effects of ACE on blood pressure and neurological conditions like AD.
• To provide an overview of ACE and its inhibitors in relation to age-related comorbidities.

Main Methods:

• Dissecting the two primary functions of ACE: its role in the renin-angiotensin system and its function as an amyloid-degrading enzyme.
• Reviewing existing literature on ACE inhibitors' efficacy in human hypertension and their potential impact on AD.
• Analyzing studies on ACE gene variants and their association with AD risk and protective effects.

Main Results:

• ACE plays a critical role in regulating blood pressure via the renin-angiotensin system.
• ACE can degrade beta-amyloid, suggesting a neuroprotective function.
• ACE inhibitors are effective for hypertension, but their specific impact on AD requires further investigation.

Conclusions:

• ACE exhibits dual functions, impacting both cardiovascular health and potentially neurological disorders like AD.
• Understanding these dual roles is crucial for developing effective therapeutic strategies for age-related diseases.
• Further research is needed to fully elucidate the complex relationship between ACE, its inhibitors, and Alzheimer's disease.