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Quiescence modulates stem cell maintenance and regenerative capacity in the aging brain

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Summary - The function of somatic stem cells declines with age. Understanding the molecular underpinnings of this decline is key to counteract age-related disease. Here, we report a dramatic drop in the neural stem cells (NSCs) number in the aging murine brain. We find that this smaller stem cell re...

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Main Authors: Kalamakis, Georgios (Author) , Stiehl, Thomas (Author) , Kupke, Janina (Author) , Mallm, Jan-Philipp (Author) , Anders, Simon (Author) , Marciniak-Czochra, Anna (Author) , Martín-Villalba, Ana (Author)
Format: Article (Journal)
Language:English
Published: March 7, 2019
In: Cell
Year: 2019, Volume: 176, Issue: 6, Pages: 1407-1419.e14
ISSN:1097-4172
DOI:10.1016/j.cell.2019.01.040
Online Access:Verlag, Volltext: https://doi.org/10.1016/j.cell.2019.01.040
Verlag, Volltext: http://www.sciencedirect.com/science/article/pii/S0092867419301035
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Author Notes:Georgios Kalamakis, Daniel Brüne, Srikanth Ravichandran, Jan Bolz, Wenqiang Fan, Frederik Ziebell, Thomas Stiehl, Francisco Catalá-Martinez, Janina Kupke, Sheng Zhao, Enric Llorens-Bobadilla, Katharina Bauer, Stefanie Limpert, Birgit Berger, Urs Christen, Peter Schmezer, Jan Philipp Mallm, Benedikt Berninger, Simon Anders, Antonio del Sol, Anna Marciniak-Czochra, and Ana Martin-Villalba
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Summary:Summary - The function of somatic stem cells declines with age. Understanding the molecular underpinnings of this decline is key to counteract age-related disease. Here, we report a dramatic drop in the neural stem cells (NSCs) number in the aging murine brain. We find that this smaller stem cell reservoir is protected from full depletion by an increase in quiescence that makes old NSCs more resistant to regenerate the injured brain. Once activated, however, young and old NSCs show similar proliferation and differentiation capacity. Single-cell transcriptomics of NSCs indicate that aging changes NSCs minimally. In the aging brain, niche-derived inflammatory signals and the Wnt antagonist sFRP5 induce quiescence. Indeed, intervention to neutralize them increases activation of old NSCs during homeostasis and following injury. Our study identifies quiescence as a key feature of old NSCs imposed by the niche and uncovers ways to activate NSCs to repair the aging brain.
Item Description:Gesehen am 25.04.2019
Physical Description:Online Resource
ISSN:1097-4172
DOI:10.1016/j.cell.2019.01.040

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