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An RNA interference phenotypic screen identifies a role for FGF signals in colon cancer progression

Marc Leushacke1, Ralf Spörle, Christof Bernemann

  • 1Department of Developmental Genetics, Max Planck Institute for Molecular Genetics, Berlin, Germany.

Plos One
|August 20, 2011
PubMed

Insights

Fibroblast Growth Factor 9 (FGF9) signaling impacts colon cancer cell shape and movement. Inhibiting FGF signals promotes adhesion and reduces motility, suggesting a role in colon cancer progression.

Area of Science:

  • Oncology
  • Molecular Biology
  • Cell Biology

Background:

  • Oncogenic signaling deregulation alters tumor cell morphology and promotes malignancy.
  • Identifying key genes influencing tumor cell shape is crucial for understanding cancer progression.

Purpose of the Study:

  • To identify genes determining colon cancer cell morphology.
  • To investigate the role of Fibroblast Growth Factor 9 (FGF9) signaling in colon cancer progression.

Main Methods:

  • RNA interference phenotypic screen in SW480 colon cancer cells.
  • Small molecular inhibitors targeting FGF receptor signals.
  • Analysis of downstream signaling cascades (MAPK, Rho GTPase) and gene expression.
  • Assessment of FGF9 expression in advanced colon cancers.

Main Results:

  • A screen identified 21 genes, including FGF9, affecting tumor cell morphology.
  • FGF receptor signal inhibition induced epithelial cell adhesion and reduced motility in colon cancer cells.
  • These effects were mediated by mitogen-activated protein kinase (MAPK) and Rho GTPase pathways.
  • FGF9 overexpression correlated with poorer patient survival in advanced colon cancers.

Conclusions:

  • FGF receptor signaling influences colon cancer cell morphology, adhesion, and motility.
  • MAPK and Rho GTPase cascades are key mediators of these FGF-induced effects.
  • FGF9 may serve as a prognostic marker and therapeutic target in colon cancer progression.

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