Injury-induced ASCL1 expression orchestrates a transitory cell state required for repair of the neonatal cerebellum Journal Article


Authors: Bayin, N. S.; Mizrak, D.; Stephen, D. N.; Lao, Z.; Sims, P. A.; Joyner, A. L.
Article Title: Injury-induced ASCL1 expression orchestrates a transitory cell state required for repair of the neonatal cerebellum
Abstract: To understand repair processes, it is critical to identify the molecular foundations underlying progenitor diversity and plasticity. Upon injury to the neonatal cerebellum, a normally gliogenic nestin-expressing progenitor (NEP) in the Bergmann glia layer (BgL) undergoes adaptive reprograming to restore granule cell production. However, the cellular states and genes regulating the NEP fate switch are unknown. Using single-cell RNA sequencing and fate mapping, we defined molecular subtypes of NEPs and their lineages under homeostasis and repair. NEPs contain two major subtypes: Hopx+ astrogliogenic and Ascl1+ neurogenic NEPs that are further subdivided based on their location, lineage, and differentiation status. Upon injury, an Ascl1+ transitory cellular state arises from Hopx+ BgLNEPs. Furthermore, mutational analysis revealed that induction of Ascl1 is required for adaptive reprogramming by orchestrating a glial-to-neural switch in vivo following injury. Thus, we provide molecular and cellular insights into context-dependent progenitor plasticity and repair mechanisms in the brain. © 2021 The Authors.
Keywords: mutational analysis; brain; in-vivo; repair; plasticity; granule cells; single cells; homoeostasis; cell state; cells production; cellular genes; cellular state; repair process
Journal Title: Science Advances
Volume: 7
Issue: 50
ISSN: 2375-2548
Publisher: Amer Assoc Advancement Science  
Date Published: 2021-12-10
Start Page: abj1598
Language: English
DOI: 10.1126/sciadv.abj1598
PROVIDER: scopus
PMCID: PMC8654303
PUBMED: 34878841
DOI/URL:
Notes: Article -- Export Date: 3 January 2022 -- Source: Scopus
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MSK Authors
  1. Zhimin Lao
    11 Lao
  2. Alexandra L Joyner
    99 Joyner
  3. Daniel N Stephen
    14 Stephen
  4. Nermin S Bayin
    12 Bayin