Postnatal deletion of Numb/Numblike reveals repair and remodeling capacity in the subventricular neurogenic niche.

Journal Article (Journal Article)

Neural stem cells are retained in the postnatal subventricular zone (SVZ), a specialized neurogenic niche with unique cytoarchitecture and cell-cell contacts. Although the SVZ stem cells continuously regenerate, how they and the niche respond to local changes is unclear. Here we generated nestin-creER(tm) transgenic mice with inducible Cre recombinase in the SVZ and removed Numb/Numblike, key regulators of embryonic neurogenesis from postnatal SVZ progenitors and ependymal cells. This resulted in severe damage to brain lateral ventricle integrity and identified roles for Numb/Numblike in regulating ependymal wall integrity and SVZ neuroblast survival. Surprisingly, the ventricular damage was eventually repaired: SVZ reconstitution and ventricular wall remodeling were mediated by progenitors that escaped Numb deletion. Our results show a self-repair mechanism in the mammalian brain and may have implications for both niche plasticity in other areas of stem cell biology and the therapeutic use of neural stem cells in neurodegenerative diseases.

Full Text

Duke Authors

Cited Authors

  • Kuo, CT; Mirzadeh, Z; Soriano-Navarro, M; Rasin, M; Wang, D; Shen, J; Sestan, N; Garcia-Verdugo, J; Alvarez-Buylla, A; Jan, LY; Jan, Y-N

Published Date

  • December 15, 2006

Published In

Volume / Issue

  • 127 / 6

Start / End Page

  • 1253 - 1264

PubMed ID

  • 17174898

Pubmed Central ID

  • PMC1876765

International Standard Serial Number (ISSN)

  • 0092-8674

Digital Object Identifier (DOI)

  • 10.1016/j.cell.2006.10.041


  • eng

Conference Location

  • United States