Foxp1 acts upstream of Vegfa, suppresses cortical angiogenesis, and promotes hypoxia in radial glia.
Pearson, C. A.; Buth, J. E.; Harrison, M. R.; Ross, M. E.; Novitch, B. G.
Show abstract
Radial glia progenitors within the cerebral cortex undergo a characteristic switch between symmetric self-renewing cell divisions early in development and asymmetric neurogenic divisions at later times, yet the mechanisms controlling this transition remain unclear. Previous work has shown that the autism-linked transcription factor Foxp1 is endogenously expressed by early but not late radial glia, and both loss and gain of Foxp1 can alter their neural progenitor activities and fate choices. Here, we show that premature loss of Foxp1 leads to an increase in transcriptional programs regulating angiogenesis, glycolysis, and cellular responses to hypoxia. These changes coincide with an elevation in Vegfa expression in radial glia and precocious vascular network development. Thus, the endogenous decline in Foxp1 expression appears to orchestrate changes in the tissue environment adjacent to radial glia that influence their metabolic state which in turn can alter their self-renewal and neurogenic capacities.
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