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Updated: Apr 6, 2026

RhoC GTPase Activation Assay
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RhoC GTPase Activation Assay

Published on: August 22, 2010

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SDF-1alpha concentration dependent modulation of RhoA and Rac1 modifies breast cancer and stromal cells interaction

Jennifer Pasquier1,2, Nadine Abu-Kaoud3, Houari Abdesselem4

  • 1Stem Cell and Microenvironment Laboratory, Weill Cornell Medical College in Qatar, Education City, Qatar Foundation, Doha, Qatar. jep2026@qatar-med.cornell.edu.

BMC Cancer
|August 2, 2015
PubMed
Abstract

Insights

Stromal cell-derived factor 1-alpha (SDF-1α) concentration impacts cancer cell migration and adhesion. SDF-1α concentration influences cancer cell metastasis by modulating Rho GTPases, affecting cell movement and attachment.

Area of Science:

  • Oncology
  • Cell Biology
  • Molecular Biology

Background:

  • The SDF-1α/CXCR4 axis is implicated in solid tumor metastasis.
  • This interaction facilitates cancer cell migration from primary tumors and homing to distant sites.

Purpose of the Study:

  • To investigate how SDF-1α influences cancer cell migration and adhesion.
  • To explore the role of Rho GTPases in SDF-1α-mediated cellular processes.

Main Methods:

  • Investigated SDF-1α effects on cancer cell migration and adhesion.
  • Analyzed Rho GTPase (RhoA and Rac1) activation and expression.
  • Utilized blocking monoclonal antibodies against CXCR4.

Main Results:

  • SDF-1α concentration differentially modulated cancer cell migration and adhesion.
  • Low SDF-1α (50-100 ng/ml) increased migration; high SDF-1α (200 ng/ml) reduced migration but increased cell adhesion.
  • SDF-1α modulated RhoA and Rac1 activity, with RhoA activation at low concentrations and Rac1 promoting adhesion at high concentrations.

Conclusions:

  • SDF-1α concentration is a critical factor in regulating cancer cell migration and adhesion.
  • The SDF-1α/CXCR4 pathway modulates cancer cell behavior through Rho GTPase signaling.
  • Understanding these mechanisms can inform strategies to control cancer metastasis.

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