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Updated: Apr 11, 2026

RhoC GTPase Activation Assay
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RhoE is required for contact inhibition and negatively regulates tumor initiation and progression

Marta Hernández-Sánchez1,2, Enric Poch1, Rosa M Guasch3

  • 1Universidad CEU-Cardenal Herrera, Facultad de Ciencias de la Salud, Dep. Ciencias Biomédicas, Moncada, Spain.

Oncotarget
|June 4, 2015
PubMed

Insights

The small GTPase RhoE suppresses tumor initiation and progression by maintaining contact inhibition and inhibiting cell proliferation. Its absence increases susceptibility to skin tumors and cancer cell metastasis.

Area of Science:

  • Molecular Biology
  • Cell Biology
  • Cancer Research

Background:

  • RhoE, a small GTPase, influences actin dynamics, cell cycle, and apoptosis.
  • The function of RhoE in cancer remains debated, with conflicting reports on its oncogenic or tumor-suppressive roles.

Purpose of the Study:

  • To investigate the role of RhoE in tumor suppression.
  • To elucidate the mechanisms by which RhoE may inhibit cancer initiation and progression.

Main Methods:

  • Utilized RhoE-deficient mice models.
  • Examined the effect of RhoE deficiency on contact inhibition and p27Kip1 nuclear translocation.
  • Assessed susceptibility to chemically induced skin tumors.
  • Investigated the impact of RhoE knockdown on cancer cell metastatic potential.

Main Results:

  • Absence of RhoE impairs contact inhibition by preventing p27Kip1 nuclear translocation.
  • RhoE deficiency cooperates with oncogenic transformation in mouse fibroblasts.
  • RhoE+/gt mice exhibit increased susceptibility to skin tumors.
  • RhoE knockdown enhances the metastatic potential of cancer cells.

Conclusions:

  • RhoE acts as a tumor suppressor, inhibiting cancer initiation and progression.
  • RhoE is crucial for maintaining normal cellular growth control and preventing metastasis.
Keywords:
RhoEcontact inhibitionmetastasisp27Kip1tumor suppression

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