VEGF-A, cytoskeletal dynamics, and the pathological vascular phenotype

Area of Science:

• Molecular Biology
• Cell Biology
• Pathology

Background:

• Normal angiogenesis forms functional vascular networks from endothelial cells (ECs).
• Pathological angiogenesis, common in tumors and ischemic diseases, results in aberrant vessels with poor barrier function.
• Vascular endothelial growth factor-A (VEGF-A) is a key driver of pathological angiogenesis.

Purpose of the Study:

• To review pathological angiogenesis from a novel perspective.
• To highlight the role of endothelial cytoskeletal dynamics in vascular morphogenesis.
• To propose new therapeutic strategies targeting Rho GTPases for pathological neovascularization.

Main Methods:

• Review of existing literature on pathological angiogenesis and VEGF-A.
• Focus on the role of Rho GTPases in endothelial cell (EC) behavior.
• Analysis of molecular cues governing EC assembly and vessel integrity.

Main Results:

• VEGF-A-induced neovessels exhibit structural and functional anomalies.
• These anomalies are partly due to imbalances in molecular cues regulating EC organization.
• Rho GTPases are critical regulators of EC motility, alignment, and junction integrity.

Conclusions:

• Endothelial cytoskeletal dynamics are crucial for proper neovascularization.
• Targeting Rho GTPases may offer novel therapeutic approaches for pathological angiogenesis.
• Understanding EC internal molecular cues is key to improving pathological vascular phenotypes.