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Monitoring eIF4F Assembly by Measuring eIF4E-eIF4G Interaction in Live Cells
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Monitoring eIF4F Assembly by Measuring eIF4E-eIF4G Interaction in Live Cells

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An eIF4E-interacting peptide induces cell death in cancer cell lines

M Masse1, V Glippa1, H Saad2

  • 11] Sorbonne Universités, UPMC Univ Paris 06, UMR 8227, Integrative Biology of Marine Models, Translation Cell Cycle and Development, Station Biologique de Roscoff, CS 90074, Roscoff cedex, France [2] CNRS, UMR 8227, Integrative Biology of Marine Models, Station Biologique de Roscoff, CS 90074, Roscoff cedex, France [3] Université Européenne de Bretagne, Brittany, France.

Cell Death & Disease
|October 31, 2014
PubMed

Insights

A novel synthetic peptide targeting eukaryotic initiation factor 4E (eIF4E) induces rapid cancer cell death. This peptide, derived from Angel1, offers a promising new strategy for cancer therapy by disrupting cell viability.

Area of Science:

  • Molecular Biology
  • Cell Biology
  • Oncology

Background:

  • Eukaryotic initiation factor 4E (eIF4E) is crucial for cap-dependent translation initiation in eukaryotes.
  • Dysregulation of eIF4E is linked to oncogenic transformation and cancer development.
  • Identifying novel therapeutic targets for cancer is a significant unmet need.

Purpose of the Study:

  • To develop and evaluate a novel synthetic peptide targeting eIF4E for cancer therapy.
  • To investigate the mechanism of cell death induced by the eIF4E-binding peptide.
  • To assess the potential of this peptide as a pharmacophore for new cancer treatments.

Main Methods:

  • Development of an eIF4E-binding peptide derived from Angel1, fused to a penetratin motif.
  • Treatment of various epithelial cancer cell lines with the synthetic peptide.
  • Analysis of cell death mechanisms, including ATP levels, F-actin network integrity, plasma membrane blebbing, and permeabilization.

Main Results:

  • The synthetic eIF4E-binding peptide induced rapid and drastic cell death in multiple epithelial cancer cell lines.
  • The observed cell death was necrotic, characterized by decreased ATP levels and F-actin network injury.
  • Key events included extensive plasma membrane blebbing and increased membrane permeabilization.

Conclusions:

  • A synthetic eIF4E-binding peptide derived from Angel1 demonstrates potent anti-cancer activity.
  • The peptide induces necrotic cell death through disruption of cellular energy and cytoskeletal integrity.
  • This peptide represents a promising candidate pharmacophore for developing novel cancer therapeutics.

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