The receptor tyrosine kinase TIE is required for integrity and survival of vascular endothelial cells

EMBO J. 1995 Dec 1;14(23):5884-91.

Abstract

Vascular endothelial cells are critical for the development and function of the mammalian circulatory system. We have analyzed the role of the endothelial cell-specific receptor tyrosine kinase TIE in the mouse vasculature. Mouse embryos homozygous for a disrupted Tie allele developed severe edema, their microvasculature was ruptured and they died between days 13.5 and 14.5 of gestation. The major blood vessels of the homozygous embryos appeared normal. Cells lacking a functional Tie gene were unable to contribute to the adult kidney endothelium in chimeric animals, further demonstrating the intrinsic requirement for TIE in endothelial cells. We conclude that TIE is required during embryonic development for the integrity and survival of vascular endothelial cells, particularly in the regions undergoing angiogenic growth of capillaries. TIE is not essential, however, for vasculogenesis, the early differentiation of endothelial cells.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Blotting, Southern
  • Cell Death
  • Cell Survival
  • Embryonic and Fetal Development
  • Endothelium, Vascular / cytology*
  • Endothelium, Vascular / embryology
  • Endothelium, Vascular / enzymology
  • Gene Targeting
  • Genes, Reporter / genetics
  • Genotype
  • Heterozygote
  • Histocytochemistry
  • Homozygote
  • Kidney / blood supply
  • Mice
  • Mice, Transgenic
  • Neovascularization, Physiologic
  • Receptor Protein-Tyrosine Kinases / genetics*
  • Receptor Protein-Tyrosine Kinases / metabolism*
  • Receptors, Cell Surface / genetics*
  • Receptors, Cell Surface / metabolism*
  • Receptors, TIE
  • Stem Cells / enzymology

Substances

  • Receptors, Cell Surface
  • Receptor Protein-Tyrosine Kinases
  • Receptors, TIE