Cited by 64Wnt/β-catenin signaling in development and cancerIon channel regulation and functionNeuroscience and Neuropharmacology Research

LEF1/β-Catenin Complex Regulates Transcription of the Cav3.1 Calcium Channel Gene (Cacna1g) in Thalamic Neurons of the Adult Brain

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Wisniewska, Marta B., Misztal, Katarzyna, Michowski, Wojciech, Szczot, Marcin, Purta, Elzbieta, Lesniak, Wieslawa, Klejman, Monika E., Dabrowski, Michal +4 more·2010·The Journal of Neuroscience

Abstract

β-Catenin, together with LEF1/TCF transcription factors, activates genes involved in the proliferation and differentiation of neuronal precursor cells. In mature neurons, β-catenin participates in dendritogenesis and synaptic function as a component of the cadherin cell adhesion complex. However, the transcriptional activity of β-catenin in these cells remains elusive. In the present study, we found that in the adult mouse brain, β-catenin and LEF1 accumulate in the nuclei of neurons specifically in the thalamus. The particular electrophysiological properties of thalamic neurons depend on T-type calcium channels. Cav3.1 is the predominant T-type channel subunit in the thalamus, and we hypothesized that the Cacna1g gene encoding Cav3.1 is a target of the LEF1/β-catenin complex. We demonstrated that the expression of Cacna1g is high in the thalamus and is further increased in thalamic neurons treated in vitro with LiCl or WNT3A, activators of β-catenin. Luciferase reporter assays confirmed that the Cacna1G promoter is activated by LEF1 and β-catenin, and footprinting analysis revealed four LEF1 binding sites in the proximal region of this promoter. Chromatin immunoprecipitation demonstrated that the Cacna1g proximal promoter is occupied by β-catenin in vivo in the thalamus, but not in the hippocampus. Moreover, WNT3A stimulation enhanced T-type current in cultured thalamic neurons. Together, our data indicate that the LEF1/β-catenin complex regulates transcription of Cacna1g and uncover a novel function for β-catenin in mature neurons. We propose that β-catenin contributes to neuronal excitability not only by a local action at the synapse but also by activating gene expression in thalamic neurons.

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Authors
Wisniewska, M. B., Misztal, K., Michowski, W., Szczot, M., Purta, E., Lesniak, W., Klejman, M. E., Dabrowski, M., Filipkowski, R. K., Nagalski, A., Mozrzymas, J. W., & Kuznicki, J.
Affiliations
  • International Institute of Molecular and Cell Biology (PL)
  • Instytut Biologii Doświadczalnej im. Marcelego Nenckiego (PL)
  • Wroclaw Medical University (PL)
Venue
The Journal of Neuroscience
Published
2010-04-06
Volume
30
Issue
14
Pages
4957-4969
ISSN
  • 0270-6474 (ISSN-L)
  • 1529-2401
OpenAlex
W2078677311
Cited by
64
References
62
Citations by year
2026: 3 · 2025: 3 · 2024: 1 · 2023: 3 · 2022: 1 · 2021: 6 · 2020: 5 · 2019: 2 · 2018: 4 · 2016: 3 · 2015: 6 · 2014: 6 · 2013: 9 · 2012: 10
FWCI
2.74
Type
journal article
Language
en
Open access
Locations
  • Journal of Neuroscience (publishedVersion, cc-by-nc-sa)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • European Commission (EU-FP7, 229676)
  • Fundacja na rzecz Nauki Polskiej (229676)
  • Uniwersytet Medyczny im. Piastów Slaskich we Wroclawiu
  • Instytut Biologii Doswiadczalnej im. M. Nenckiego PAN
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Wnt/β-catenin signaling in development and cancer
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Ion channel regulation and function
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
Keywords
β-catenin, LEF1, Wnt signaling, CACNA1G, Cav3.1, T-type calcium channels, thalamic neurons, transcriptional regulation, promoter regulation, Wnt3a, neuronal excitability, adult brain
MeSH terms
Age Factors, Animals, Cells, Cultured, Female, HeLa Cells, Humans, Male, Neurons, Synapses, Thalamus, Transcriptional Activation, Calcium Channels, T-Type, beta Catenin, Mice, Rats, Lymphoid Enhancer-Binding Factor 1

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