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Classification of Neural Stem Cell Activation State In Vitro using Autofluorescence
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A Latent Activated Olfactory Stem Cell State Revealed by Single-Cell Transcriptomic and Epigenomic Profiling.

Koen Van den Berge1,2, Dana Bakalar3, Hsin-Jung Chou4

  • 1Department of Statistics, University of California, Berkeley, CA.

Biorxiv : the Preprint Server for Biology
|November 14, 2023
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Scientists discovered a "latent activated" state in olfactory stem cells. These quiescent cells are epigenetically primed, ready to regenerate the olfactory epithelium after injury, aiding neural regeneration research.

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Area of Science:

  • Neuroscience
  • Stem Cell Biology
  • Regenerative Medicine

Background:

  • The olfactory epithelium exhibits lifelong neurogenesis, making it a model for neural regeneration.
  • Studying its stem cells offers insights into neural repair mechanisms after injury.

Purpose of the Study:

  • To identify molecular and epigenetic factors governing olfactory stem cell fate during regeneration.
  • To understand the heterogeneity of stem cells during injury-induced repair.

Main Methods:

  • Single-cell RNA sequencing and ATAC-sequencing were employed.
  • Lineage-traced olfactory stem cells were analyzed for gene expression and chromatin accessibility.

Main Results:

  • Transcriptional heterogeneity was observed in activated stem cells during fate specification.
  • A subset of resting stem cells showed accessible chromatin for wound response genes, indicating pre-activation.

Conclusions:

  • Evidence suggests a latent activated stem cell state in the olfactory epithelium.
  • Quiescent stem cells can be epigenetically primed for rapid regeneration upon injury.