The specification of cortical subcerebral projection neurons depends on the direct repression of TBR1 by CTIP1/BCL11a
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Fecha
2015-05
Profesor/a Guía
Facultad/escuela
Idioma
en
Título de la revista
ISSN de la revista
Título del volumen
Editor
Society for Neuroscience
Nombre de Curso
Licencia CC
Atribución 4.0 Internacional (CC BY 4.0)
Licencia CC
https://creativecommons.org/licenses/by/4.0/deed.es
Resumen
The acquisition of distinct neuronal fates is fundamental for the function of the cerebral cortex. We find that the development of subcerebral projections from layer 5 neurons in the mouse neocortex depends on the high levels of expression of the transcription factor CTIP1; CTIP1 is coexpressed with CTIP2 in neurons that project to subcerebral targets and with SATB2 in those that project to the contralateral cortex. CTIP1 directly represses Tbr1 in layer 5, which appears as a critical step for the acquisition of the subcerebral fate. In contrast, lower levels of CTIP1 in layer 6 are required for TBR1 expression, which directs the corticothalamic fate. CTIP1 does not appear to play a critical role in the acquisition of the callosal projection fate in layer 5. These findings unravel a key step in the acquisition of cell fate for closely related corticofugal neurons and indicate that differential dosages of transcriptions factors are critical to specify different neuronal identities. © 2015 the authors.
Notas
Indexación: Scopus
Palabras clave
Cerebral cortex, CTIP1, CTIP2, In utero electroporation, Subcerebral projection neurons, TBR1
Citación
Journal of Neuroscience Volume 35, Issue 19, Pages 7552 - 756413 May 2015
DOI
10.1523/JNEUROSCI.0169-15.2015