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Reduction of cell proliferation induced by PD166866: an inhibitor of the basic fibroblast growth factor

N Calandrella1, G Risuleo, G Scarsella

  • 1Department of Cell Biology and Development, University of Rome La Sapienza, Italy.

Journal of Experimental & Clinical Cancer Research : CR
|November 9, 2007
PubMed
Abstract

Insights

The tyrosine kinase inhibitor PD166866 significantly reduces cell proliferation and viability in fibroblasts by inhibiting the basic Fibroblast Growth Factor (bFGF)/Fibroblast Growth Factor Receptor-1 (FGFR-1) pathway, potentially through apoptosis induction.

Area of Science:

  • Oncology
  • Cell Biology
  • Pharmacology

Background:

  • Cell proliferation dysregulation is central to tumor development.
  • Growth factors like basic Fibroblast Growth Factor (bFGF) are implicated in pathologies with uncontrolled cell growth.
  • Targeting specific signaling pathways offers therapeutic potential for proliferative diseases.

Purpose of the Study:

  • To evaluate the effects of PD166866, a potent tyrosine kinase inhibitor, on cell proliferation.
  • To investigate the inhibition of the bFGF/Fibroblast Growth Factor Receptor-1 (FGFR-1) system by PD166866.
  • To assess the impact of PD166866 on fibroblast viability and proliferation.

Main Methods:

  • Utilized cultured murine fibroblasts (3T6 cell line).
  • Assessed FGFR-1 inhibition mediated by PD166866.
  • Employed cell viability assays and molecular biology techniques.
  • Examined chromatin degradation as an indicator of apoptosis.

Main Results:

  • PD166866 demonstrated potent and selective inhibition of FGFR-1.
  • The compound negatively regulated the bFGF/FGFR-1 signaling pathway.
  • Significant reduction in cell proliferation and loss of viability were observed in 3T6 cells.
  • Evidence suggests PD166866 induces apoptosis, indicated by chromatin degradation.

Conclusions:

  • PD166866 effectively inhibits the bFGF/FGFR-1 system, reducing fibroblast proliferation and viability.
  • The drug's mechanism may involve the induction of apoptosis.
  • PD166866 shows potential therapeutic utility in managing fibrotic proliferative diseases and other tumor pathologies.

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