VE-Cadherin-Mediated Cell-Cell Interaction Suppresses Sprouting via Signaling to MLC2 Phosphorylation

Research output: Contribution to journalArticle

  • External authors:
  • Margaret Yeo
  • Mercedes Montero-Balaguer
  • Hugh Paterson
  • Elisabetta Dejana
  • Christopher J. Marshall
  • Georgia Mavria

Abstract

During new blood vessel formation, the cessation of angiogenic sprouting is necessary for the generation of functional vasculature. How sprouting is halted is not known, but it is contemporaneous with the development of stable intercellular junctions [1]. We report that VE-cadherin, which is responsible for endothelial adherens junction organization [2, 3], plays a crucial role in the cessation of sprouting. Abrogating VE-cadherin function in an organotypic angiogenesis assay and in zebrafish embryos stimulates sprouting. We show that VE-cadherin signals to Rho-kinase-dependent myosin light-chain 2 phosphorylation, leading to actomyosin contractility [4], which regulates the distribution of VE-cadherin at cell-cell junctions. VE-cadherin antagonizes VEGFR2 signaling, and consequently, inhibition of VE-cadherin, Rho-kinase, or actomyosin contractility leads to VEGF-driven, Rac1-dependent sprouting. These findings suggest a novel mechanism by which cell-cell adhesion suppresses Rac1-dependent migration and sprouting by increasing actomyosin contractility at cell junctions. © 2009 Elsevier Ltd. All rights reserved.

Bibliographical metadata

Original languageEnglish
Pages (from-to)668-674
Number of pages6
JournalCurrent Biology
Volume19
Issue number8
DOIs
Publication statusPublished - 28 Apr 2009