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Updated: Sep 28, 2026

Focus Formation: A Cell-based Assay to Determine the Oncogenic Potential of a Gene
08:18

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Published on: December 31, 2014

Synergistic effect of focal adhesion kinase overexpression and hepatocyte growth factor stimulation on cell

Po-Chao Chan1, Chun-Chi Liang, Kuo-Ching Yu

  • 1Department of Life Sciences and the Graduate Institute of Biomedical Sciences, National Chung Hsing University, Taichung 40227, Taiwan.

The Journal of Biological Chemistry
|October 24, 2002
PubMed

Insights

Focal adhesion kinase (FAK) overexpression combined with hepatocyte growth factor (HGF) promotes cell transformation. This process requires FAK binding to Src and p130(cas), highlighting p130(cas)

Area of Science:

  • Cell Biology
  • Molecular Oncology
  • Signal Transduction

Background:

  • Elevated focal adhesion kinase (FAK) levels are linked to invasive human tumors.
  • FAK alone does not induce cell transformation, leaving its oncogenic role unclear.

Purpose of the Study:

  • To investigate the role of FAK in oncogenic transformation.
  • To determine the mechanisms by which FAK potentiates cell transformation in response to hepatocyte growth factor (HGF).

Main Methods:

  • Overexpression of FAK in Madin-Darby canine kidney epithelial cells.
  • Utilized various FAK mutants and dominant-negative constructs for Src and p130(cas).
  • Analyzed HGF-elicited signaling pathways, including ERK, JNK, and AKT activation.

Main Results:

  • FAK overexpression sensitized cells to HGF-induced transformation.
  • Simultaneous binding of Src and p130(cas) to FAK was essential for potentiating transformation.
  • Dominant-negative versions of FAK, Src, or p130(cas) reversed transformed phenotypes.
  • FAK overexpression enhanced HGF-induced sustained activation of ERK, JNK, and AKT signaling.

Conclusions:

  • Synergistic interaction between FAK overexpression and HGF stimulation drives cell transformation.
  • p130(cas) plays a critical role in mediating FAK-dependent cell transformation.
  • FAK enhances HGF signaling pathways crucial for oncogenic transformation.

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