Proper autophagy is indispensable for angiogenesis during chick embryo development.

Area of Science:

• Cell Biology
• Developmental Biology
• Molecular Biology

Background:

• Autophagy is a critical cellular process involved in numerous physiological and pathological events.
• The specific role of autophagy in embryonic angiogenesis remains largely unknown.

Purpose of the Study:

• To investigate the role of autophagy in embryonic angiogenesis.
• To elucidate the molecular mechanisms by which autophagy influences blood vessel development.

Main Methods:

• Detection of autophagy-related genes (Atg7, Atg8, Beclin1) in embryonic vasculature.
• In vivo manipulation of autophagy using inducers and inhibitors in chick embryos.
• In vitro studies using human umbilical vein endothelial cells (HUVECs) with autophagy modulation (siRNA, plasmids, RAPA, 3-MA).
• Assessment of angiogenesis, cell viability, migration, tube formation, cell junctions, and cytoskeleton organization.

Main Results:

• Autophagy-related genes are expressed in embryonic angiogenic vessels.
• Autophagy modulation restricts embryonic angiogenesis, disrupts gene expression, and causes embryonic hemorrhage due to impaired cell junctions.
• Altered autophagy affects HUVEC viability, migration, and tube formation.
• Autophagy manipulation impacts cytoskeleton organization and cell polarity.

Conclusions:

• Autophagy plays a significant role in regulating embryonic angiogenesis.
• Disruption of autophagy leads to defects in blood vessel development, cell junction integrity, and cytoskeleton organization.
• Autophagy is a key regulator of endothelial cell behavior during embryonic development.