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Updated: May 18, 2026

RhoC GTPase Activation Assay
09:58

RhoC GTPase Activation Assay

Published on: August 22, 2010

The small GTPase RhoG mediates glioblastoma cell invasion

Aneta Kwiatkowska1, Sebastien Didier, Shannon Fortin

  • 1Center for Oncology and Cell Biology, The Feinstein Institute for Medical Research at North Shore-LIJ, Manhasset, NY, USA.

Molecular Cancer
|September 13, 2012
PubMed
Abstract

Insights

Rho GTPase (RhoG) plays a critical role in glioblastoma invasion and survival. Targeting RhoG signaling offers a promising new therapeutic strategy for malignant astrocytomas.

Area of Science:

  • Neuro-oncology
  • Cellular signaling
  • Cancer biology

Background:

  • Glioblastoma invasion into normal brain impedes therapy.
  • Rho family guanine nucleotide exchange factors Trio and Vav3 influence glioblastoma invasion via RhoG.
  • The specific role of RhoG in glioblastoma cell behavior requires further investigation.

Purpose of the Study:

  • To investigate the role of RhoG in glioblastoma cell invasion and survival.
  • To explore the upstream activators and downstream effectors of RhoG in glioblastoma.

Main Methods:

  • Small interfering RNA (siRNA) mediated depletion of RhoG.
  • Ex vivo invasion assays using brain slices.
  • Cell proliferation and colony formation assays.
  • Analysis of GTPase activation by growth factors (HGF, EGF).
  • Assessment of lamellipodia and invadopodia formation.

Main Results:

  • RhoG depletion significantly inhibited glioblastoma cell invasion.
  • RhoG knockdown reduced glioblastoma cell survival but had minimal impact on proliferation.
  • RhoG activation was induced by HGF and EGF, and RhoG was overexpressed in glioblastoma tumors.
  • RhoG depletion blocked HGF/EGF-induced Rac1 activation and formation of lamellipodia/invadopodia.

Conclusions:

  • RhoG is crucial for glioblastoma cell invasion and survival.
  • Targeting RhoG-mediated signaling pathways represents a novel therapeutic approach for glioblastoma.

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