Flow-regulated endothelial S1P receptor-1 signaling sustains vascular development. Academic Article uri icon

Overview

abstract

  • During angiogenesis, nascent vascular sprouts fuse to form vascular networks, enabling efficient circulation. Mechanisms that stabilize the vascular plexus are not well understood. Sphingosine 1-phosphate (S1P) is a blood-borne lipid mediator implicated in the regulation of vascular and immune systems. Here we describe a mechanism by which the G protein-coupled S1P receptor-1 (S1P1) stabilizes the primary vascular network. A gradient of S1P1 expression from the mature regions of the vascular network to the growing vascular front was observed. In the absence of endothelial S1P1, adherens junctions are destabilized, barrier function is breached, and flow is perturbed, resulting in abnormal vascular hypersprouting. Interestingly, S1P1 responds to S1P as well as laminar shear stress to transduce flow-mediated signaling in endothelial cells both in vitro and in vivo. These data demonstrate that blood flow and circulating S1P activate endothelial S1P1 to stabilize blood vessels in development and homeostasis.

publication date

  • September 11, 2012

Research

keywords

  • Blood Vessels
  • Endothelial Cells
  • Receptors, Lysosphingolipid
  • Signal Transduction

Identity

PubMed Central ID

  • PMC3443394

Scopus Document Identifier

  • 84866025219

Digital Object Identifier (DOI)

  • 10.1016/j.devcel.2012.07.015

PubMed ID

  • 22975328

Additional Document Info

volume

  • 23

issue

  • 3