Spatio-Temporal Recruitment Of Adult Neural Stem Cells For Transient Neurogenesis During Pregnancy
Chaker, Z.; Segalada, C.; Doetsch, F.
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Neural stem cells (NSCs) in the adult mouse brain contribute to lifelong brain plasticity. NSCs in the adult ventricular-subventricular zone (V-SVZ) are heterogeneous and, depending on their location in the niche, give rise to different subtypes of olfactory bulb interneurons. Here, we show that during pregnancy multiple regionally-distinct NSCs are dynamically recruited at different times. Coordinated temporal activation of these NSC pools generates sequential waves of short-lived olfactory bulb interneuron subtypes that mature in the mother around birth and in the perinatal care period. Concomitant with neuronal addition, oligodendrocyte progenitors also transiently increase in the olfactory bulb. Thus, life experiences, such as pregnancy, can trigger transient neurogenesis and gliogenesis under tight spatial and temporal control, and may provide a novel substrate for brain plasticity in anticipation of temporary physiological demand.
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