Fiche publication
Date publication
juillet 2018
Journal
Cell reports
Auteurs
Membres identifiés du Cancéropôle Est :
Dr KREZEL Wojciech
Tous les auteurs :
Bonzano S, Crisci I, Podlesny-Drabiniok A, Rolando C, Krezel W, Studer M, De Marchis S
Lien Pubmed
Résumé
In the dentate gyrus (DG) of the mouse hippocampus, neurogenesis and astrogliogenesis persist throughout life. Adult-born neurons and astrocytes originate from multipotent neural stem cells (NSCs) whose activity is tightly regulated within the neurogenic niche. However, the cell-intrinsic mechanisms controlling neuron-glia NSC fate choice are largely unknown. Here, we show COUP-TFI/NR2F1 expression in DG NSCs and its downregulation upon neuroinflammation. By using in vivo inducible knockout lines, a retroviral-based loss-of-function approach and genetic fate mapping, we demonstrate that COUP-TFI inactivation in adult NSCs and/or mitotic progenitors reduces neurogenesis and increases astrocyte production without depleting the NSC pool. Moreover, forced COUP-TFI expression in adult NSCs/progenitors decreases DG astrogliogenesis and rescues the neuro-astrogliogenic imbalance under neuroinflammation. Thus, COUP-TFI is necessary and sufficient to promote neurogenesis by suppressing astrogliogenesis. Our data propose COUP-TFI as a central regulator of the neuron-astroglia cell fate decision and a key modulator during neuroinflammation in the adult hippocampus.
Mots clés
NR2F1, adult neurogenesis, astrogliogenesis, dentate gyrus, neural progenitors, neural stem cells, neuroinflammation
Référence
Cell Rep. 2018 07 10;24(2):329-341
