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Quantification of Breast Cancer Cell Invasiveness Using a Three-dimensional (3D) Model
08:08

Quantification of Breast Cancer Cell Invasiveness Using a Three-dimensional (3D) Model

Published on: June 11, 2014

Chemical modulation of VLA integrin affinity in human breast cancer cells

Martina K Pec1, Michaela Artwohl, José J Fernández

  • 1Servicio de Reumatología, Hospital Universitario de Canarias, C/Ofra s/n, La Cuesta, 38320 La Laguna, Santa Cruz de Tenerife, Spain.

Experimental Cell Research
|March 3, 2007
PubMed

Insights

Dehydrothyrsiferol (DT) reduces breast cancer cell adhesion to extracellular matrix via integrin regulation, inhibiting apoptosis. This natural compound offers a potential new strategy for cancer therapy by targeting integrin activation.

Area of Science:

  • Molecular Biology
  • Cell Biology
  • Cancer Research

Background:

  • Integrin-extracellular matrix interactions are crucial for cell survival and cancer progression.
  • Disruption of these contacts can induce cell death, making cell adhesion a target for cancer control.
  • The very late activation antigen (VLA) family of integrins plays a role in cancer cell behavior.

Purpose of the Study:

  • To investigate the functional effects of interfering with VLA integrin activity in human breast cancer cell lines.
  • To explore the potential of dehydrothyrsiferol (DT) as a regulator of integrin-mediated adhesion and apoptosis.

Main Methods:

  • Studied human breast cancer cell lines with varying malignancy.
  • Assessed the impact of dehydrothyrsiferol (DT) on alpha2beta1 and alpha5beta1 integrin-mediated adhesion.
  • Measured apoptosis, cell toxicity, integrin expression, focal adhesion kinase (FAK) phosphorylation, and integrin activation levels.
  • Utilized an anti-beta1 activating monoclonal antibody (TS2/16) for rescue experiments.

Main Results:

  • Dehydrothyrsiferol (DT) dose-dependently reduced breast cancer cell adhesion via VLA integrins (alpha2beta1, alpha5beta1) on low extracellular matrix.
  • DT's effect was not due to general cell toxicity and differed from standard chemotherapeutics.
  • DT reduced integrin activation levels without altering integrin expression or key signaling proteins like FAK and Akt/PKB.
  • Treatment with an anti-beta1 antibody rescued cells from DT-induced apoptosis.

Conclusions:

  • Dehydrothyrsiferol (DT) modulates integrin activation, impacting breast cancer cell apoptosis.
  • Chemical regulation of integrin affinity represents a promising therapeutic strategy for invasive cancers.
  • Targeting integrin activation states may offer a novel approach to cancer therapy and metastasis prevention.

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