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Adult neurogenesis requires Smad4-mediated bone morphogenic protein signaling in stem cells.
J. Neurosci. 28, 434-445 (2008)
In the mammalian brain, neurogenesis continues only in few regions of the forebrain. The molecular signals governing neurogenesis in these unique neurogenic niches, however, are still ill defined. Here, we show that bone morphogenic protein (BMP)-mediated signaling is active in adult neural stem cells and is crucial to initiate the neurogenic lineage in the adult mouse subependymal zone. Conditional deletion of Smad4 in adult neural stem cells severely impairs neurogenesis, and this is phenocopied by infusion of Noggin, an extracellular antagonist of BMP. Smad4 deletion in stem, but not progenitor cells, as well as Noggin infusion lead to an increased number of Olig2-expressing progeny that migrate to the corpus callosum and differentiate into oligodendrocytes. Transplantation experiments further verified the cell-autonomous nature of this phenotype. Thus, BMP-mediated signaling via Smad4 is required to initiate neurogenesis from adult neural stem cells and suppress the alternative fate of oligodendrogliogenesis
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Publikationstyp
Artikel: Journalartikel
Dokumenttyp
Wissenschaftlicher Artikel
Schlagwörter
neural stem cells; Olig2; Dlx2; neurogenesis; oligodendrocytes; transplantation
ISSN (print) / ISBN
0270-6474
e-ISSN
1529-2401
Zeitschrift
Journal of Neuroscience
Quellenangaben
Band: 28,
Heft: 2,
Seiten: 434-445
Verlag
Society for Neuroscience
Nichtpatentliteratur
Publikationen
Begutachtungsstatus
Peer reviewed
Institut(e)
Institute of Stem Cell Research (ISF)