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VEGF regulates cell behavior during vasculogenesis.

C J Drake1, A LaRue, N Ferrara

  • 1Department of Cell Biology and the Cardiovascular Developmental Biology Center, Medical University of South Carolina, Charleston 29425, USA.

Developmental Biology
|August 6, 2000
PubMed
Summary
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Vascular endothelial growth factor (VEGF) signaling is crucial for blood vessel formation. This study shows VEGF controls endothelial cell protrusion, a key factor in blood vessel development.

Area of Science:

  • Developmental Biology
  • Cell Biology
  • Angiogenesis Research

Background:

  • Vascular endothelial growth factor (VEGF) is a key regulator of neovascularization.
  • VEGF binds to receptor tyrosine kinases like VEGF receptor-1 (VEGFR-1) and VEGF receptor-2 (VEGFR-2).
  • Genetic deficiencies in VEGF or VEGFR-2 in mice lead to embryonic lethality, hindering detailed study of endothelial cell behavior.

Purpose of the Study:

  • To investigate the role of VEGF signaling in endothelial cell behavior and blood vessel morphogenesis.
  • To elucidate the specific cellular mechanisms by which VEGF influences vascular development.

Main Methods:

  • Loss-of-function studies using avian embryos.
  • Injection of soluble VEGFR-1 to block VEGF signaling.

Related Experiment Videos

  • Gain-of-function studies to assess the impact of increased VEGF signaling.

    • Main Results:

    • Inhibition of VEGFR-1 signaling led to malformed vascular networks, absence of large vessels, and vascular atresia in avian embryos.
    • A significant decrease in endothelial cell protrusive activity was observed following VEGFR-1 inhibition.
    • Enhanced VEGF signaling markedly increased endothelial cell protrusive activity.

    Conclusions:

    • VEGF/VEGF receptor signaling directly regulates endothelial cell protrusive activity.
    • Endothelial cell protrusive activity is a critical determinant of blood vessel morphogenesis.
    • VEGF acts as an instructive molecule in the process of de novo blood vessel formation.