Angiotensin-Converting Enzyme 2 Overexpression Protects Heart from Aging-Induced Injury in C57BL/6 Mice

Area of Science:

• Cardiovascular Biology
• Aging Research
• Molecular Cardiology

Background:

• Cardiovascular disease (CVD) is a major global health concern, particularly in older adults.
• Cardiac function declines with age, mirroring observations in both humans and C57BL/6 mice.
• The renin-angiotensin system (RAS) plays a complex role in CVD, with Angiotensin-converting enzyme 2 (ACE2) acting as a key counter-regulatory component.

Purpose of the Study:

• To investigate the protective effects of ACE2 against age-related cardiac decline using transgenic K18-hACE2 mice.
• To elucidate the molecular mechanisms underlying ACE2's role in mitigating cardiac aging phenotypes.
• To assess ACE2's potential as a therapeutic target for anti-aging interventions in cardiovascular health.

Main Methods:

• Histological and morphometric analyses of cardiac tissue from K18-hACE2 and wild-type mice.
• Assessment of age-related cardiac aging markers, including mitochondrial function and telomere length.
• Evaluation of immune system regulation in the context of cardiac aging and ACE2 expression.

Main Results:

• K18-hACE2 mice exhibited reduced heart weight and improved cardiac structure compared to wild-type controls.
• Progressive cardiac aging phenotypes, such as mitochondrial dysfunction, telomere shortening, and immune dysregulation, were significantly attenuated in K18-hACE2 mice.
• These findings highlight the beneficial impact of enhanced ACE2 activity on cardiac health during aging.

Conclusions:

• ACE2 demonstrates a significant protective role in preventing cardiac aging.
• Targeting ACE2 may offer a novel therapeutic strategy for combating age-related cardiovascular disease.
• Further research into ACE2-based interventions could lead to advancements in anti-aging therapies for cardiovascular health.