A restricted period for formation of outer subventricular zone defined by Cdh1 and Trnp1 levels

Maria Ángeles Martínez-Martínez, Camino De Juan Romero, Virginia Fernández, Adrián Cárdenas, Magdalena Götz and Víctor Borrell ()
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Maria Ángeles Martínez-Martínez: Instituto de Neurociencias, Consejo Superior de Investigaciones Científicas and Universidad Miguel Hernández
Camino De Juan Romero: Instituto de Neurociencias, Consejo Superior de Investigaciones Científicas and Universidad Miguel Hernández
Virginia Fernández: Instituto de Neurociencias, Consejo Superior de Investigaciones Científicas and Universidad Miguel Hernández
Adrián Cárdenas: Instituto de Neurociencias, Consejo Superior de Investigaciones Científicas and Universidad Miguel Hernández
Magdalena Götz: Helmholtz Center Munich, German Research Center for Environmental Health, Institute for Stem Cell Research
Víctor Borrell: Instituto de Neurociencias, Consejo Superior de Investigaciones Científicas and Universidad Miguel Hernández

Nature Communications, 2016, vol. 7, issue 1, 1-15

Abstract: Abstract The outer subventricular zone (OSVZ) is a germinal layer playing key roles in the development of the neocortex, with particular relevance in gyrencephalic species such as human and ferret, where it contains abundant basal radial glia cells (bRGCs) that promote cortical expansion. Here we identify a brief period in ferret embryonic development when apical RGCs generate a burst of bRGCs that become founders of the OSVZ. After this period, bRGCs in the OSVZ proliferate and self-renew exclusively locally, thereby forming a self-sustained lineage independent from the other germinal layers. The time window for the brief period of OSVZ bRGC production is delineated by the coincident downregulation of Cdh1 and Trnp1, and their upregulation reduces bRGC production and prevents OSVZ seeding. This mechanism in cortical development may have key relevance in brain evolution and disease.

Date: 2016
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DOI: 10.1038/ncomms11812

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