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Quantification of Breast Cancer Cell Invasiveness Using a Three-dimensional 3D Model
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MEKK2 regulates focal adhesion stability and motility in invasive breast cancer cells

Ahmed A Mirza1, Michael P Kahle1, Magdalene Ameka1

  • 1Department of Molecular Pharmacology and Therapeutics, Stritch School of Medicine, Loyola University Chicago, Maywood, IL 60153, USA.

Biochimica Et Biophysica Acta
|February 5, 2014
PubMed

Insights

MEK Kinase 2 (MEKK2) regulates breast tumor cell behavior. Silencing MEKK2 enhances cell spread and focal adhesion stability, impacting metastasis.

Area of Science:

  • Cell Biology
  • Molecular Biology
  • Cancer Research

Background:

  • MEK Kinase 2 (MEKK2) is a MAP3K involved in MAPK signaling.
  • MEKK2 ablation inhibits breast tumor xenograft metastasis.
  • The precise mechanism of MEKK2's role in metastasis is unclear.

Purpose of the Study:

  • To investigate the functional role of MEKK2 in breast tumor cell metastasis.
  • To elucidate the molecular mechanisms by which MEKK2 influences tumor cell functions.

Main Methods:

  • Gene silencing of MEKK2 in invasive breast tumor cells.
  • Assessment of cell spread area, migration, and focal adhesion dynamics.
  • Analysis of MEKK2 activation, localization, and downstream signaling pathways (ERK5, FAK).

Main Results:

  • MEKK2 silencing enhanced breast tumor cell spread area and focal adhesion stability.
  • MEKK2 activation and localization to focal adhesions were induced by matrix protein attachment.
  • MEKK2 knockdown inhibited fibronectin-induced ERK5 signaling and FAK autophosphorylation.

Conclusions:

  • MEKK2 acts as a signaling regulator modulating breast tumor cell spread and migration.
  • MEKK2 controls focal adhesion stability, a key factor in tumor cell movement.
  • Targeting MEKK2 may offer a strategy to inhibit breast tumor metastasis.
Keywords:
FibronectinFocal adhesionKinaseMEKK2

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