Direct cell-cell contact with the vascular niche maintains quiescent neural stem cells

Nat Cell Biol. 2014 Nov;16(11):1045-56. doi: 10.1038/ncb3045. Epub 2014 Oct 5.


The vasculature is a prominent component of the subventricular zone neural stem cell niche. Although quiescent neural stem cells physically contact blood vessels at specialized endfeet, the significance of this interaction is not understood. In contrast, it is well established that vasculature-secreted soluble factors promote lineage progression of committed progenitors. Here we specifically investigated the role of cell-cell contact-dependent signalling in the vascular niche. Unexpectedly, we find that direct cell-cell interactions with endothelial cells enforce quiescence and promote stem cell identity. Mechanistically, endothelial ephrinB2 and Jagged1 mediate these effects by suppressing cell-cycle entry downstream of mitogens and inducing stemness genes to jointly inhibit differentiation. In vivo, endothelial-specific ablation of either of the genes which encode these proteins, Efnb2 and Jag1 respectively, aberrantly activates quiescent stem cells, resulting in depletion. Thus, we identify the vasculature as a critical niche compartment for stem cell maintenance, furthering our understanding of how anchorage to the niche maintains stem cells within a pro-differentiative microenvironment.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Calcium-Binding Proteins / metabolism*
  • Cell Communication / physiology*
  • Cell Cycle / physiology
  • Cell Differentiation / physiology*
  • Cell Division / physiology
  • Endothelial Cells / cytology
  • Ephrin-B2 / metabolism*
  • Humans
  • Intercellular Signaling Peptides and Proteins / metabolism*
  • Jagged-1 Protein
  • Male
  • Membrane Proteins / metabolism*
  • Mice, 129 Strain
  • Mice, Inbred C57BL
  • Mice, Transgenic
  • Neural Stem Cells / cytology*
  • Neurons / cytology
  • Serrate-Jagged Proteins
  • Stem Cell Niche / genetics
  • Stem Cell Niche / physiology*


  • Calcium-Binding Proteins
  • Ephrin-B2
  • Intercellular Signaling Peptides and Proteins
  • JAG1 protein, human
  • Jag1 protein, mouse
  • Jagged-1 Protein
  • Membrane Proteins
  • Serrate-Jagged Proteins