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Induction and Analysis of Epithelial to Mesenchymal Transition
10:37

Induction and Analysis of Epithelial to Mesenchymal Transition

Published on: August 27, 2013

A pathway for the control of anoikis sensitivity by E-cadherin and epithelial-to-mesenchymal transition

Sanjeev Kumar1, Sun Hee Park, Benjamin Cieply

  • 1Department of Biochemistry and Mary Babb Randolph Cancer Center, West Virginia University, Morgantown, West Virginia 26506, USA.

Molecular and Cellular Biology
|July 13, 2011
PubMed

Insights

Epithelial-to-mesenchymal transition (EMT) confers anoikis resistance by altering NRAGE localization. This pathway involves TBX2 and represses the tumor suppressor p14ARF, preventing anoikis and potentially aiding metastasis.

Area of Science:

  • Molecular biology
  • Cell biology
  • Cancer research

Background:

  • Anoikis, a programmed cell death, prevents cancer metastasis by eliminating detached epithelial cells.
  • Cancer cells undergoing epithelial-to-mesenchymal transition (EMT) often evade anoikis through poorly understood mechanisms.

Purpose of the Study:

  • To elucidate the molecular mechanisms by which EMT confers resistance to anoikis.
  • To identify novel pathways regulating anoikis during oncogenesis.

Main Methods:

  • Investigated the interaction between NRAGE (neurotrophin receptor-interacting melanoma antigen) and the E-cadherin complex component ankyrin-G.
  • Analyzed the effect of oncogenic EMT on ankyrin-G levels and NRAGE localization.
  • Examined the interaction between TBX2 and NRAGE and its impact on the p14ARF tumor suppressor gene.

Main Results:

  • Oncogenic EMT downregulates ankyrin-G, leading to increased nuclear localization of NRAGE.
  • The oncogenic protein TBX2 interacts with nuclear NRAGE.
  • The TBX2/NRAGE complex represses the tumor suppressor p14ARF, which sensitizes cells to anoikis.
  • Downregulation of p14ARF by the TBX2/NRAGE complex confers anoikis resistance.

Conclusions:

  • A novel pathway regulating anoikis during EMT involves NRAGE, ankyrin-G, TBX2, and p14ARF.
  • This pathway explains how EMT compromises anoikis sensitivity, potentially promoting cancer metastasis.
  • Targeting this pathway may offer new therapeutic strategies for preventing cancer spread.

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