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The transcription factor snail is a repressor of E-cadherin gene expression in epithelial tumour cells

E Batlle1, E Sancho, C Francí

  • 1Unitat de Biologia Cel.lular i Molecular, Institut Municipal d'Investigació Mèdica, Universitat Pompeu Fabra, Dr Aiguader 80, 08003 Barcelona, Spain.

Nature Cell Biology
|February 3, 2000
PubMed

Insights

The transcription factor Snail represses E-cadherin gene expression in epithelial tumors. Inhibiting Snail restores E-cadherin, potentially reversing metastatic potential.

Area of Science:

  • Molecular biology
  • Cell biology
  • Cancer research

Background:

  • E-cadherin is crucial for epithelial cell adhesion and morphogenesis.
  • Downregulation of E-cadherin is linked to metastatic potential in epithelial tumors.
  • Transcriptional repression is a suspected mechanism for E-cadherin loss.

Purpose of the Study:

  • To investigate the role of the transcription factor Snail in E-cadherin gene regulation.
  • To determine if Snail directly represses E-cadherin transcription.
  • To assess if inhibiting Snail can restore E-cadherin expression in cancer cells.

Main Methods:

  • Analysis of Snail binding to the human E-cadherin promoter.
  • Reporter assays to measure transcriptional activity.
  • Functional inhibition of Snail in epithelial cancer cell lines.

Main Results:

  • Snail binds to three specific E-box elements within the E-cadherin promoter.
  • Snail binding leads to repression of E-cadherin gene transcription.
  • Inhibition of Snail function in E-cadherin-negative cancer cells restored E-cadherin gene expression.

Conclusions:

  • Snail acts as a transcriptional repressor of E-cadherin.
  • Snail-mediated repression of E-cadherin contributes to the loss of epithelial adhesion in cancer progression.
  • Targeting Snail may offer a therapeutic strategy to restore E-cadherin expression and suppress metastasis.

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