Dynamic Spatiotemporal Coordination of Neural Stem Cell Fate Decisions Through Local Feedback in the Adult Vertebrate Brain

    July 2020 in “ bioRxiv (Cold Spring Harbor Laboratory) ”
    Nicolas Dray, Laure Mancini, Udi Binshtok, Félix Cheysson, Willy Supatto, Pierre Mahou, Sébastien Bedu, Sara Ortica, Mónika Krecsmarik, Sébastien Herbert, Jean‐Baptiste Masson, Jean‐Yves Tinevez, Gabriel Lang, Emmanuel Beaurepaire, David Sprinzak, Laure Bally‐Cuif
    Studysummary This study demonstrates that neural stem cells in the adult vertebrate brain coordinate their division decisions using delayed local feedback mechanisms, involving Notch-mediated inhibition and dispersion effects, to maintain population homeostasis. Our plain-language summary of this paper — not a Tressless recommendation.
    The study investigated the mechanisms controlling neural stem cell (NSC) populations in the adult vertebrate brain, focusing on how these cells maintain homeostasis over a lifetime. Researchers used dynamic imaging, pharmacological manipulations, mathematical modeling, and spatial statistics to reveal that NSCs coordinate their division decisions through spatiotemporally resolved local feedback mechanisms. These mechanisms include Notch-mediated inhibition from transient neural progenitors and a dispersion effect from dividing NSCs, with a delay of 9-12 days. Simulations using a stochastic NSC lattice model showed that these interactions are linked by lineage progression and control the spatiotemporal distribution of output neurons. The findings highlighted the role of local and temporally delayed interactions in maintaining NSC population homeostasis with specific spatiotemporal correlations.
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