Primary Cilia and Atherosclerosis

Area of Science:

• Cardiovascular Biology
• Cellular Mechanosensing
• Endothelial Function

Background:

• Endothelial cell (EC) function is influenced by blood flow shear stress.
• Disturbed shear stress promotes inflammation and atherogenesis, while laminar flow is protective.
• Primary cilia are cellular organelles that sense mechanical forces.

Purpose of the Study:

• To review the role of primary cilia in the cardiovascular system.
• To explore the relationship between primary cilia, shear stress, and endothelial cell function.
• To discuss ciliogenesis, ciliary structure, distribution, and signaling in the context of cardiovascular health.

Main Methods:

• Literature review of studies on primary cilia and shear stress in the cardiovascular system.
• Analysis of primary cilia distribution in relation to blood flow patterns.
• Examination of signaling pathways modulated by primary cilia in ECs.

Main Results:

• Primary cilia are enriched in disturbed shear stress regions (e.g., artery branches, bifurcations) and sparse in laminar flow areas.
• Primary cilia protect against EC mesenchymal transition, calcification, and disturbed shear stress-induced damage.
• Primary cilia modulate Ca2+ influx and nitric oxide (NO) release, inhibiting atherosclerosis.

Conclusions:

• Primary cilia are critical mechanosensors in the cardiovascular system.
• The distribution and function of primary cilia are integral to maintaining endothelial health and preventing atherosclerosis.
• Targeting primary cilia may offer novel therapeutic strategies for cardiovascular diseases.