YAP and TAZ regulate adherens junction dynamics and endothelial cell distribution during vascular development

Area of Science:

• Cell Biology
• Developmental Biology
• Vascular Biology

Background:

• Sprouting angiogenesis is essential for tissue growth and repair.
• The mechanisms governing endothelial cell proliferation and arrangement in developing vessels are not fully understood.

Purpose of the Study:

• To investigate the role of YAP/TAZ proteins in regulating endothelial cell behavior during angiogenesis.
• To elucidate the molecular mechanisms by which YAP/TAZ influence vascular network formation.

Main Methods:

• Utilized mouse models to study YAP/TAZ function in vivo.
• Investigated endothelial cell proliferation, migration, and junctional integrity.
• Analyzed the impact of YAP/TAZ on VE-Cadherin turnover and BMP signaling.

Main Results:

• YAP/TAZ promote stretch-induced endothelial cell proliferation and rearrangements, preventing bleeding.
• YAP/TAZ regulate VE-Cadherin turnover and lamellipodia formation, enhancing cell migration and barrier function.
• Loss of YAP/TAZ results in stunted sprouting, cell scarcity, and vascular defects; forced TAZ activity causes hyperplasia.

Conclusions:

• YAP/TAZ integrate mechanical signals and BMP signaling to control endothelial cell behavior in angiogenic vessels.
• YAP/TAZ are crucial for maintaining junctional integrity and balancing cell rearrangements during vascular development.