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Published in Cell stem cell - 02 Apr 2021

Dray N, Mancini L, Binshtok U, Cheysson F, Supatto W, Mahou P, Bedu S, Ortica S, Than-Trong E, Krecsmarik M, Herbert S, Masson JB, Tinevez JY, Lang G, Beaurepaire E, Sprinzak D, Bally-Cuif L,

Link to Pubmed [PMID] – 33823144

Link to DOI – S1934-5909(21)00120-X10.1016/j.stem.2021.03.014

Cell Stem Cell 2021 Apr; ():

Neural stem cell (NSC) populations persist in the adult vertebrate brain over a lifetime, and their homeostasis is controlled at the population level through unknown mechanisms. Here, we combine dynamic imaging of entire NSC populations in their in vivo niche over several weeks with pharmacological manipulations, mathematical modeling, and spatial statistics and demonstrate that NSCs use spatiotemporally resolved local feedback signals to coordinate their decision to divide in adult zebrafish brains. These involve Notch-mediated short-range inhibition from transient neural progenitors and a dispersion effect from the dividing NSCs themselves exerted with a delay of 9-12 days. Simulations from a stochastic NSC lattice model capturing these interactions demonstrate that these signals are linked by lineage progression and control the spatiotemporal distribution of output neurons. These results highlight how local and temporally delayed interactions occurring between brain germinal cells generate self-propagating dynamics that maintain NSC population homeostasis and coordinate specific spatiotemporal correlations.

https://pubmed.ncbi.nlm.nih.gov/33823144