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Robins, S.C.* ; Stewart, I.* ; McNay, D.E.* ; Taylor, V.* ; Giachino, C.* ; Götz, M. ; Ninkovic, J. ; Briancon, N.* ; Maratos-Flier, E.* ; Flier, J.S.* ; Kokoeva, M.V.* ; Placzek, M.*

α-Tanycytes of the adult hypothalamic third ventricle include distinct populations of FGF-responsive neural progenitors.

Nat. Commun. 4:2049 (2013)
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Emerging evidence suggests that new cells, including neurons, can be generated within the adult hypothalamus, suggesting the existence of a local neural stem/progenitor cell niche. Here, we identify α-tanycytes as key components of a hypothalamic niche in the adult mouse. Long-term lineage tracing in vivo using a GLAST::CreER(T2) conditional driver indicates that α-tanycytes are self-renewing cells that constitutively give rise to new tanycytes, astrocytes and sparse numbers of neurons. In vitro studies demonstrate that α-tanycytes, but not β-tanycytes or parenchymal cells, are neurospherogenic. Distinct subpopulations of α-tanycytes exist, amongst which only GFAP-positive dorsal α2-tanycytes possess stem-like neurospherogenic activity. Fgf-10 and Fgf-18 are expressed specifically within ventral tanycyte subpopulations; α-tanycytes require fibroblast growth factor signalling to maintain their proliferation ex vivo and elevated fibroblast growth factor levels lead to enhanced proliferation of α-tanycytes in vivo. Our results suggest that α-tanycytes form the critical component of a hypothalamic stem cell niche, and that local fibroblast growth factor signalling governs their proliferation.
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Publication type Article: Journal article
Document type Scientific Article
ISSN (print) / ISBN 2041-1723
e-ISSN 2041-1723
Quellenangaben Volume: 4, Issue: , Pages: , Article Number: 2049 Supplement: ,
Publisher Nature Publishing Group
Publishing Place London
Reviewing status Peer reviewed