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Spatiotemporally Dependent Vascularization Is Differently Utilized among Neural Progenitor Subtypes during Neocortical Development.
Cell Reports 2019 October 30
To facilitate efficient oxygen and nutrient delivery, blood vessels in the brain form three-dimensional patterns. However, little is known about how blood vessels develop stereographically in the neocortex and how they control the expansion and differentiation of neural progenitors during neocortical development. We show that highly vascularized and avascular regions are strictly controlled in a spatially and temporally restricted manner and are associated with distinct cell populations. Dividing basal progenitors and oligodendrocyte precursors preferentially contact honeycomb vessels, but dividing apical progenitors are localized in avascular regions without Flt1-positive endothelial cells but directly contact with sprouting neovascular tip cells. Therefore, not all blood vessels are associated equally with neural progenitors. Furthermore, a disruption of normal vascular patterning can induce abnormalities in neural development, whereas the impaired features of neural progenitors influenced angiogenesis patterning. These results indicate that close association between the nervous and vascular systems is essential for neocortex assembly.
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