期刊
CELL STEM CELL
卷 28, 期 2, 页码 300-+出版社
CELL PRESS
DOI: 10.1016/j.stem.2020.10.019
关键词
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资金
- flow cytometry core facility of the Center for Regenerative Therapies Dresden (CRTD)
- DRESDEN-concept Genome Center (DDcGC) at Technische Universitat Dresden
- German Research Foundation (DFG) [MA 5831/1-1]
- European Research Council (ERC) under the European Union [680042]
- VI-510 RNA metabolism in ALS and FTD''
- AMPro consortium of the Helmholtz Association
- European Research Council (ERC) [680042] Funding Source: European Research Council (ERC)
The study discovered that quiescent neural precursor cells (NPCs) in the hippocampus of adult mice maintain the highest levels of intracellular reactive oxygen species (ROS). Different functional states of NPCs were identified based on their ROS content, and physical activity was found to recruit NPCs with high ROS levels into proliferation. This mechanism provides a link between the modulation of cellular ROS by behavioral cues and the activation of adult NPCs.
Cellular redox states regulate the balance between stem cell maintenance and activation. Increased levels of intracellular reactive oxygen species (ROS) are linked to proliferation and lineage specification. In contrast to this general principle, we here show that in the hippocampus of adult mice, quiescent neural precursor cells (NPCs) maintain the highest ROS levels (hiROS). Classifying NPCs on the basis of cellular ROS content identified distinct functional states. Shifts in ROS content primed cells for a subsequent state transition, with lower ROS content marking proliferative activity and differentiation. Physical activity, a physiological activator of adult hippocampal neurogenesis, recruited hiROS NPCs into proliferation via a transient Nox2-dependent ROS surge. In the absence of Nox2, baseline neurogenesis was unaffected, but the activity-induced increase in proliferation disappeared. These results provide a metabolic classification of NPC functional states and describe a mechanism linking the modulation of cellular ROS by behavioral cues to the activation of adult NPCs.
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