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Related Experiment Video

Updated: Feb 10, 2026

Large-scale Three-dimensional Imaging of Cellular Organization in the Mouse Neocortex
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Tcf7L2 is essential for neurogenesis in the developing mouse neocortex.

Olga Chodelkova1, Jan Masek1,2, Vladimir Korinek1

  • 1Institute of Molecular Genetics of the Czech Academy of Sciences, Vídeňská 1084, 14200, Prague, Czech Republic.

Neural Development
|May 13, 2018
PubMed
Summary

Transcription factor Tcf7L2 is essential for maintaining embryonic neocortex progenitor identity and neuroepithelial structure. Its absence reduces Wnt signaling, leading to forebrain hypoplasia.

Keywords:
NeocortexNeurogenenesisTcf7L1Tcf7L2Wnt signalling

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Area of Science:

  • Neuroscience
  • Developmental Biology
  • Genetics

Background:

  • Neocortical neurogenesis involves progenitor cell proliferation and differentiation.
  • Canonical Wnt signaling regulates radial glial cell expansion and intermediate progenitor differentiation.

Purpose of the Study:

  • Investigate the role of Tcf7L1 and Tcf7L2 transcription factors in canonical Wnt signaling during embryonic neocortex development.
  • Determine the specific function of Tcf7L2 in maintaining ventricular zone progenitor identity.

Main Methods:

  • Conditional knock-out analysis in embryonic neocortex.
  • Detection of transcription factor expression (Tcf7L1, Tcf7L2).
  • Analysis of Wnt signaling activity and progenitor cell markers (Pax6, Sox2).

Main Results:

  • Tcf7L2, but not Tcf7L1, is the primary mediator of Wnt signaling in the ventricular zone.
  • Tcf7L2 deficiency reduces Wnt activity, downregulates Pax6 and Sox2, and disrupts neuroepithelial structure.
  • Loss of Tcf7L2 leads to decreased radial glial cell proliferation, fewer intermediate progenitors, and forebrain hypoplasia.

Conclusions:

  • Canonical Wnt signaling, mediated by Tcf7L2, is crucial for maintaining the neuroepithelial character of the neocortical ventricular zone.
  • Tcf7L2 is essential for progenitor cell identity, proliferation, and overall forebrain development.