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Article Dans Une Revue Science Advances Année : 2023

Apical size and deltaA expression predict adult neural stem cell decisions along lineage progression

Boris Guirao
Pierre Mahou
Emilie Menant

Résumé

The maintenance of neural stem cells (NSCs) in the adult brain depends on their activation frequency and division mode. Using long-term intravital imaging of NSCs in the zebrafish adult telencephalon, we reveal that apical surface area and expression of the Notch ligand DeltaA predict these NSC decisions. deltaA -negative NSCs constitute a bona fide self-renewing NSC pool and systematically engage in asymmetric divisions generating a self-renewing deltaA neg daughter, which regains the size and behavior of its mother, and a neurogenic deltaA pos daughter, eventually engaged in neuronal production following further quiescence-division phases. Pharmacological and genetic manipulations of Notch, DeltaA, and apical size further show that the prediction of activation frequency by apical size and the asymmetric divisions of deltaA neg NSCs are functionally independent of Notch. These results provide dynamic qualitative and quantitative readouts of NSC lineage progression in vivo and support a hierarchical organization of NSCs in differently fated subpopulations.
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Origine : Publication financée par une institution
Licence : CC BY - Paternité

Dates et versions

pasteur-04197164 , version 1 (05-09-2023)

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Paternité

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Laure Mancini, Boris Guirao, Sara Ortica, Miriam Labusch, Felix Cheysson, et al.. Apical size and deltaA expression predict adult neural stem cell decisions along lineage progression. Science Advances , 2023, 9 (35), pp.eadg7519. ⟨10.1126/sciadv.adg7519⟩. ⟨pasteur-04197164⟩
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