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Filamin a mediates HGF/c-MET signaling in tumor cell migration

Alex-Xianghua Zhou1, Aslı Toylu, Rajesh K Nallapalli

  • 1Department of Medical Biochemistry and Cell Biology, Institute of Biomedicine, University of Gothenburg, Göteborg, Sweden.

International Journal of Cancer
|May 18, 2010
PubMed

Insights

Filamin A (FLNA) regulates hepatocyte growth factor (HGF)/c-MET signaling. FLNA deficiency impairs tumor cell migration by reducing c-MET expression and downstream AKT activation, suggesting FLNA as a therapeutic target in cancer.

Area of Science:

  • Oncology
  • Molecular Biology
  • Cell Biology

Background:

  • The hepatocyte growth factor (HGF)/c-MET pathway is crucial in cancer progression and drug resistance.
  • Understanding novel regulators of HGF/c-MET signaling is vital for developing effective cancer therapies.

Purpose of the Study:

  • To investigate the role of filamin A (FLNA) in regulating HGF/c-MET signaling in human cancers.
  • To determine the impact of FLNA on tumor cell migration and invasion.

Main Methods:

  • Expression analysis of FLNA and c-MET in human cancer tissues and cells.
  • Assessing tumor cell migration, invasion, and proliferation in FLNA-deficient cells.
  • Investigating downstream signaling pathways, including AKT activation.
  • Analyzing c-MET promoter activity and SMAD2 binding.
  • Validation in Flna-deficient mouse embryonic fibroblasts.

Main Results:

  • FLNA is expressed in human cancer cells, and its deficiency reduces c-MET expression.
  • FLNA-deficient cells show impaired HGF-induced migration and invasion but unaltered proliferation.
  • FLNA deficiency attenuates HGF-stimulated AKT activation.
  • FLNA enhances c-MET promoter activity via SMAD2 binding.

Conclusions:

  • Filamin A (FLNA) is a key regulator of c-MET signaling and HGF-induced tumor cell migration.
  • FLNA's role in modulating c-MET expression and downstream signaling highlights its potential as a therapeutic target in cancer treatment.

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