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Citation
Janssens, D.H., Hamm, D.C., Anhezini, L., Xiao, Q., Siller, K.H., Siegrist, S.E., Harrison, M.M., Lee, C.Y. (2017). An Hdac1/Rpd3-Poised Circuit Balances Continual Self-Renewal and Rapid Restriction of Developmental Potential during Asymmetric Stem Cell Division.  Dev. Cell 40(4): 367--380.e7.
FlyBase ID
FBrf0234930
Publication Type
Research paper
Abstract

How the developmental potential of differentiating stem cell progeny becomes rapidly and stably restricted following asymmetric stem cell division is unclear. In the fly larval brain, earmuff (erm) uniquely functions to restrict the developmental potential of intermediate neural progenitors (INPs) generated by asymmetrically dividing neural stem cells (neuroblasts). Here we demonstrate that the histone deacetylase Hdac1/Rpd3 functions together with self-renewal transcriptional repressors to maintain the erm immature INP enhancer in an inactive but poised state in neuroblasts. Within 2 hr of immature INP birth, downregulation of repressor activities alleviates Rpd3-mediated repression on the erm enhancer, enabling acetylation of multiple histone proteins and activating Erm expression. Erm restricts the developmental potential in immature INPs by repressing genes encoding neuroblast transcriptional activators. We propose that poising the fast-activating enhancers of master regulators of differentiation through continual histone deacetylation in stem cells enables self-renewal and rapid restriction of developmental potential following asymmetric division.

Graphical Abstract
Obtained with permission from Cell Press.
PubMed ID
PubMed Central ID
PMC5336133 (PMC) (EuropePMC)
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Secondary IDs
    Language of Publication
    English
    Additional Languages of Abstract
    Parent Publication
    Publication Type
    Journal
    Abbreviation
    Dev. Cell
    Title
    Developmental Cell
    Publication Year
    2001-
    ISBN/ISSN
    1534-5807 1878-1551
    Data From Reference
    Genes (20)
    Cell Lines (1)