Angiotensin-converting enzyme and vascular remodeling

Area of Science:

• Cardiovascular biology
• Pharmacology
• Vascular medicine

Background:

• Vascular remodeling involves intricate changes in vascular tone and structure.
• The renin-angiotensin system, particularly angiotensin II (Ang II), plays a critical role in these processes.

Purpose of the Study:

• To review the role of angiotensin-converting enzyme (ACE) and ACE inhibition in vascular remodeling.
• To discuss the impact of ACE inhibition across various vascular conditions including injury, restenosis, hypertension, atherosclerosis, and aneurysm formation.

Main Methods:

• Review of existing literature on ACE, Ang II, and their role in vascular remodeling.
• Analysis of findings from animal studies and clinical trials concerning ACE inhibition.

Main Results:

• ACE and Ang II significantly contribute to neointimal thickening, arterial remodeling in hypertension, and inflammatory responses in atherosclerosis, primarily via AT(1) receptor signaling.
• ACE inhibition shows promise in counteracting aneurysm formation, potentially through effects on matrix metalloproteinase activity.
• Clinical trial results for ACE inhibitors in atherosclerosis remain inconclusive.

Conclusions:

• ACE and Ang II are key regulators of vascular remodeling in multiple pathological conditions.
• ACE inhibition is a viable therapeutic strategy for certain vascular remodeling processes, such as aneurysms, but its efficacy in atherosclerosis warrants further research.
• The role of ACE2 in vascular remodeling needs further elucidation.