Cited by 624Neurogenesis and neuroplasticity mechanismsDevelopmental Biology and Gene RegulationCongenital heart defects research

A role for neural determination genes in specifying the dorsoventral identity of telencephalic neurons

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Fode, Carol, Ma, Qiufu, Casarosa, Simona, Ang, Siew-Lan, Anderson, David J., Guillemot, François·2000·Genes & Development

Abstract

Neurogenin1 (Ngn1), Neurogenin2(Ngn2), and Mash1 encode bHLH transcription factors with neuronal determination functions. In the telencephalon, the Ngns and Mash1 are expressed at high levels in complementary dorsal and ventral domains, respectively. We found that Ngn function is required to maintain these two separate expression domains, as Mash1 expression is up-regulated in the dorsal telencephalon of Ngn mutant embryos. We have taken advantage of the replacement of the Ngns by Mash1 in dorsal progenitors to address the role of the neural determination genes in neuronal-type specification in the telencephalon. In Ngn2 single and Ngn1; Ngn2 double mutants, a population of early born cortical neurons lose expression of dorsal-specific markers and ectopically express a subset of ventral telencephalic-specific markers. Analysis of Mash1; Ngn2 double mutant embryos and of embryos carrying a Ngn2 to Mash1 replacement mutation demonstrated that ectopic expression of Mash1 is required and sufficient to confer these ventral characteristics to cortical neurons. Our results indicate that in addition to acting as neuronal determinants, Mash1 and Ngns play a role in the specification of dorsal-ventral neuronal identity, directly linking pathways of neurogenesis and regional patterning in the forebrain.

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Authors
Fode, C., Ma, Q., Casarosa, S., Ang, S.-L., Anderson, D. J., & Guillemot, F.
Affiliations
California Institute of Technology (US)
Venue
Genes & Development
Published
2000-01-01
Volume
14
Issue
1
Pages
67-80
ISSN
  • 0890-9369 (ISSN-L)
  • 1549-5477
OpenAlex
W2124109473
Cited by
624
References
80
Citations by year
2026: 6 · 2025: 15 · 2024: 10 · 2023: 17 · 2022: 15 · 2021: 18 · 2020: 21 · 2019: 16 · 2018: 23 · 2017: 23 · 2016: 16 · 2015: 21 · 2014: 25 · 2013: 30 · 2012: 32
Type
posted content
Language
en
Open access
Locations
  • Genes & Development (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • CaltechAUTHORS (California Institute of Technology) (submittedVersion, cc-by-nc)
Funders
  • Association pour la Recherche sur le Cancer
  • Institut National de la Santé et de la Recherche Médicale
  • Centre National de la Recherche Scientifique
  • Medical Research Council Canada
  • Medical Research Council
Topics
  • Life Sciences › Neuroscience › Developmental Neuroscience › Neurogenesis and neuroplasticity mechanisms
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Developmental Biology and Gene Regulation
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Congenital heart defects research
Keywords
neurogenin1, Neurogenin2, ASCL1, bHLH transcription factors, telencephalic neurons, cortical neurons, dorsoventral patterning, ectopic expression
MeSH terms
Base Sequence, DNA-Binding Proteins, Mutation, Nerve Tissue Proteins, Neurons, Telencephalon, Transcription Factors, Down-Regulation, DNA Primers, Gene Expression Regulation, Developmental, Cell Lineage, Basic Helix-Loop-Helix Proteins

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