The specification of cortical subcerebral projection neurons depends on the direct repression of TBR1 by CTIP1/BCL11a

José Cánovas, F. Andrés Berndt, Hugo Sepúlveda, Rodrigo Aguilar, Felipe A. Veloso, Martín Montecino, Carlos Oliva, Juan C. Maass, Jimena Sierralta, Manuel Kukuljan

Research output: Contribution to journalArticlepeer-review

44 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)7552-7564
Number of pages13
JournalJournal of Neuroscience
Volume35
Issue number19
DOIs
Publication statusPublished - 13 May 2015

Keywords

  • CTIP1
  • CTIP2
  • Cerebral cortex
  • In utero electroporation
  • Subcerebral projection neurons
  • TBR1

ASJC Scopus subject areas

  • General Neuroscience

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