From endothelial dysfunction to vascular occlusion: role of the renin-angiotensin system

Area of Science:

• Cardiovascular Science
• Vascular Biology
• Renal Physiology

Background:

• The renin-angiotensin system (RAS) plays a critical role in cardiovascular homeostasis.
• Evidence links RAS activity to the development and progression of atherosclerotic disease.
• Key components include angiotensin-converting enzyme (ACE) and angiotensin II (Ang II).

Purpose of the Study:

• To elucidate the multifaceted role of the RAS in the pathogenesis of atherosclerosis.
• To detail the mechanisms by which RAS components influence vascular dysfunction and plaque development.
• To highlight the impact of Ang II on inflammatory responses and plaque stability.

Main Methods:

• Review of existing scientific literature on RAS and atherosclerosis.
• Analysis of studies investigating endothelial function and vascular inflammation.
• Examination of research on Ang II's effects on vascular smooth muscle cells and plaque components.

Main Results:

• RAS activation promotes endothelial dysfunction, an early marker of vascular disease.
• Inflammatory cells contribute ACE and Ang II to the vascular wall, driving atherosclerotic progression.
• Ang II stimulates vascular smooth muscle cell migration and phenotypic changes, accelerating disease.
• Ang II modulates inflammatory responses, influencing plaque instability and thrombotic events.

Conclusions:

• The RAS is a key mediator in the continuum of cardiovascular disease, particularly in atherosclerosis.
• Ang II is a central player, promoting vascular damage, inflammation, plaque progression, and acute ischemic events.
• Targeting the RAS may offer therapeutic strategies for managing atherosclerotic and cardiovascular diseases.