Cited by 271Neurogenesis and neuroplasticity mechanismsDevelopmental Biology and Gene RegulationAxon Guidance and Neuronal Signaling

SOX5 postmitotically regulates migration, postmigratory differentiation, and projections of subplate and deep-layer neocortical neurons

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Kwan, Kenneth Y., Lam, Mandy M. S., Krsnik, Željka, Kawasawa, Yuka Imamura, Lefebvre, Veronique, Šestan, Nenad·2008·Proceedings of the National Academy of Sciences

Abstract

Neocortical projection neurons exhibit layer-specific molecular profiles and axonal connections. Here we show that the molecular identities of early-born subplate and deep-layer neurons are not acquired solely during generation or shortly thereafter but undergo progressive postmitotic refinement mediated by SOX5. Fezf2 and Bcl11b , transiently expressed in all subtypes of newly postmigratory early-born neurons, are subsequently downregulated in layer 6 and subplate neurons, thereby establishing their layer 5-enriched postnatal patterns. In Sox5 -null mice, this downregulation is disrupted, and layer 6 and subplate neurons maintain an immature differentiation state, abnormally expressing these genes postnatally. Consistent with this disruption, SOX5 binds and represses a conserved enhancer near Fezf2 . The Sox5 -null neocortex exhibits failed preplate partition and laminar inversion of early-born neurons, loss of layer 5 subcerebral axons, and misrouting of subplate and layer 6 corticothalamic axons to the hypothalamus. Thus, SOX5 postmitotically regulates the migration, postmigratory differentiation, and subcortical projections of subplate and deep-layer neurons.

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Crossref · 10.1073/pnas.0806791105

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  • SOX5 has a known role in mammalian corticogenesis.

    “Among the transcription factors identified, SOX5 was of particular interest because of its known role in mammalian corticogenesis23,24, its sole membership in the ACP set, and its correlation with predicted targets in the brains of control subjects, which is lost in ASD (Fig. 2b–d).”
  • The observed transcriptome changes are consistent with an ongoing process triggered largely by genetic and prenatal factors but evolving during the first decade of brain development.

    “In this regard, it is notable that the observed transcriptome changes are consistent with an ongoing process that is triggered largely by genetic and prenatal factors3,9,10,23, but that evolves during the first decade of brain development.”

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Authors
Kwan, K. Y., Lam, M. M. S., Krsnik, Ž., Kawasawa, Y. I., Lefebvre, V., & Šestan, N.
Affiliations
  • Yale University (US)
  • Department of Cell Biology and Orthopaedic Research Center, Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44195
Venue
Proceedings of the National Academy of Sciences
Published
2008-10-14
Volume
105
Issue
41
Pages
16021-16026
ISSN
  • 0027-8424 (ISSN-L)
  • 1091-6490
OpenAlex
W1985705162
Cited by
271
References
36
Citations by year
2026: 6 · 2025: 9 · 2024: 15 · 2023: 14 · 2022: 13 · 2021: 18 · 2020: 14 · 2019: 14 · 2018: 10 · 2017: 14 · 2016: 22 · 2015: 19 · 2014: 19 · 2013: 26 · 2012: 14
FWCI
4.49
Type
journal article
Language
en
Open access
Locations
  • Proceedings of the National Academy of Sciences (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • March of Dimes Foundation
  • Whitehall Foundation
  • Cincinnati Children's Hospital Medical Center
  • National Institutes of Health
  • Canadian Institutes of Health Research
  • RIKEN
  • National Institute of Neurological Disorders and Stroke (R01NS054273, NS 054273)
  • RIKEN Brain Science Institute
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 › Neuroscience › Cellular and Molecular Neuroscience › Axon Guidance and Neuronal Signaling
Keywords
SOX5, neuronal migration, subplate neurons, Fezf2, BCL11B, enhancer repression, cortical lamination, neocortex development
MeSH terms
Animals, Cell Differentiation, Cell Movement, DNA-Binding Proteins, Mitosis, Neurons, Repressor Proteins, Down-Regulation, Cell Adhesion Molecules, Mice, Knockout, Neocortex, Cell Surface Extensions, Tumor Suppressor Proteins, Mice, SOXD Transcription Factors

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