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

Ottone, Cristina; Krusche, Benjamin; Whitby, Ariadne; Clements, Melanie; Quadrato, Giorgia; Pitulescu, Mara E; Adams, Ralf H; (2014) Direct cell–cell contact with the vascular niche maintains quiescent neural stem cells. Nature Cell Biology , 16 (11) pp. 1045-1056. 10.1038/ncb3045. Green open access

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Abstract

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.

Type: Article
Title: Direct cell–cell contact with the vascular niche maintains quiescent neural stem cells
Location: England
Open access status: An open access version is available from UCL Discovery
DOI: 10.1038/ncb3045
Publisher version: https://doi.org/10.1038/ncb3045
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: Adult neurogenesis, Neural stem cells, Stem-cell niche
UCL classification: UCL
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Medical Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Medical Sciences > Cancer Institute
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Medical Sciences > Cancer Institute > Research Department of Cancer Bio
URI: https://discovery.ucl.ac.uk/id/eprint/10159942
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