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Quiescence Modulates Stem Cell Maintenance and Regenerative Capacity in the Aging Brain

  • 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, Ana Martin-Villalba

Research output: Contribution to JournalArticleAcademicpeer-review

Abstract

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. Aged brains have a small number of highly quiescent neural stem cells that, upon activation, functionally resemble young stem cells; it is the niche itself that becomes more inflammatory and drives this quiescence.
Original languageEnglish
Pages (from-to)1407-1419.e14
JournalCell
Volume176
Issue number6
DOIs
Publication statusPublished - 7 Mar 2019
Externally publishedYes

Funding

We thank S. Wolf from the DKFZ Genomics and Proteomics Core Facility, V. Eckstein from the Heidelberg Universty Hospital FACS Core Facility, Monika Langlotz from the ZMBH FACS Core Facility, Reinhard Gliniorz for technical assistance in performing the comet assay, Gonzalo Saiz-Castro and Klara Zwadlo for technical assistance, Hai-Kun Liu for Tlx-CreER T2 mice, Mathias Heikenwälder for TCF/Lef reporter mice, and the Light Microscopy Core Facility for support. This work was supported by the DFG ( SFB873 , SFB1324 , SFB1036 , INST 161/875-2 ), the Helmholtz Alliance for Aging and Metabolic Programming (AMPro), and the DKFZ . W.F. is supported by the China Scholarship Council . We thank S. Wolf from the DKFZ Genomics and Proteomics Core Facility, V. Eckstein from the Heidelberg Universty Hospital FACS Core Facility, Monika Langlotz from the ZMBH FACS Core Facility, Reinhard Gliniorz for technical assistance in performing the comet assay, Gonzalo Saiz-Castro and Klara Zwadlo for technical assistance, Hai-Kun Liu for Tlx-CreERT2 mice, Mathias Heikenwälder for TCF/Lef reporter mice, and the Light Microscopy Core Facility for support. This work was supported by the DFG (SFB873, SFB1324, SFB1036, INST 161/875-2), the Helmholtz Alliance for Aging and Metabolic Programming (AMPro), and the DKFZ. W.F. is supported by the China Scholarship Council.

FundersFunder number
Helmholtz Alliance
California Department of Fish and WildlifeSFB1036, SFB1324, INST 161/875-2, SFB873
Deutsches Krebsforschungszentrum
Horizon 2020 Framework Programme771376
Deutsche Forschungsgemeinschaft
China Scholarship Council

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