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Cell Rep. 2016 Oct 4;17(2):469-483. doi: 10.1016/j.celrep.2016.09.024.

MyT1 Counteracts the Neural Progenitor Program to Promote Vertebrate Neurogenesis.

Author information

1
Instituto Gulbenkian de Ciência, 2780-156 Oeiras, Portugal.
2
Division of Neuroscience, San Raffaele Scientific Institute, 20132 Milan, Italy.
3
Department of Cell and Molecular Biology, Ludwig Institute for Cancer Research, Karolinska Institutet, 17177 Stockholm, Sweden.
4
Instituto Gulbenkian de Ciência, 2780-156 Oeiras, Portugal. Electronic address: dscastro@igc.gulbenkian.pt.

Abstract

The generation of neurons from neural stem cells requires large-scale changes in gene expression that are controlled to a large extent by proneural transcription factors, such as Ascl1. While recent studies have characterized the differentiation genes activated by proneural factors, less is known on the mechanisms that suppress progenitor cell identity. Here, we show that Ascl1 induces the transcription factor MyT1 while promoting neuronal differentiation. We combined functional studies of MyT1 during neurogenesis with the characterization of its transcriptional program. MyT1 binding is associated with repression of gene transcription in neural progenitor cells. It promotes neuronal differentiation by counteracting the inhibitory activity of Notch signaling at multiple levels, targeting the Notch1 receptor and many of its downstream targets. These include regulators of the neural progenitor program, such as Hes1, Sox2, Id3, and Olig1. Thus, Ascl1 suppresses Notch signaling cell-autonomously via MyT1, coupling neuronal differentiation with repression of the progenitor fate.

KEYWORDS:

Ascl1; Hes1; MyT1; Notch signaling; Rbpj; neurogenesis; transcription

PMID:
27705795
PMCID:
PMC5067283
DOI:
10.1016/j.celrep.2016.09.024
[Indexed for MEDLINE]
Free PMC Article

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