TY - JOUR
T1 - Quiescence Modulates Stem Cell Maintenance and Regenerative Capacity in the Aging Brain
AU - Kalamakis, Georgios
AU - Brüne, Daniel
AU - Ravichandran, Srikanth
AU - Bolz, Jan
AU - Fan, Wenqiang
AU - Ziebell, Frederik
AU - Stiehl, Thomas
AU - Catalá-Martinez, Francisco
AU - Kupke, Janina
AU - Zhao, Sheng
AU - Llorens-Bobadilla, Enric
AU - Bauer, Katharina
AU - Limpert, Stefanie
AU - Berger, Birgit
AU - Christen, Urs
AU - Schmezer, Peter
AU - Mallm, Jan Philipp
AU - Berninger, Benedikt
AU - Anders, Simon
AU - del Sol, Antonio
AU - Marciniak-Czochra, Anna
AU - Martin-Villalba, Ana
PY - 2019/3/7
Y1 - 2019/3/7
N2 - 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.
AB - 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.
UR - https://www.scopus.com/pages/publications/85061657205
U2 - 10.1016/j.cell.2019.01.040
DO - 10.1016/j.cell.2019.01.040
M3 - Article
SN - 0092-8674
VL - 176
SP - 1407-1419.e14
JO - Cell
JF - Cell
IS - 6
ER -