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

Sabu Abraham, Margaret Yeo, Mercedes Montero-Balaguer, Hugh Paterson, Elisabetta Dejana, Christopher J. Marshall, Georgia Mavria

    Research output: Contribution to journalArticlepeer-review

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

    Keywords

    • CELLBIO
    • SIGNALING

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