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eIF4E--from translation to transformation.

Yaël Mamane1, Emmanuel Petroulakis, Liwei Rong

  • 1Department of Biochemistry, McGill Cancer Centre, McGill University, 3655 Promenade Sir-William-Osler, Montreal, Quebec, Canada, H3G 1Y6.

Oncogene
|April 20, 2004
PubMed
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The Ras and Akt pathways regulate translation via the initiation factor eIF4E, crucial for cancer development. Targeting eIF4E offers a promising strategy for anticancer therapies.

Area of Science:

  • Molecular Biology
  • Oncology
  • Cell Biology

Background:

  • Historically, research focused on transcriptional regulation in oncogenesis.
  • Recent studies highlight the critical role of translational control in cancer.
  • Ras and Akt signaling pathways are key regulators of mRNA translation and cellular transformation.

Purpose of the Study:

  • To review the role of the translation initiation factor eIF4E in oncogenesis.
  • To elucidate how Ras and Akt signaling pathways influence translation and mediate cancer development.

Main Methods:

  • Literature review focusing on translational control mechanisms in cancer.
  • Analysis of the convergence of Ras/Akt pathways on eIF4E.
  • Examination of eIF4E's role in regulating malignancy-associated mRNAs.

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Main Results:

  • eIF4E binds the 5'cap of mRNAs, controlling translation of key oncogenic transcripts.
  • eIF4E regulates mRNAs involved in polyamine synthesis, cell cycle, proto-oncogene activation, angiogenesis, growth, survival, invasion, and cell communication.
  • eIF4E activity is implicated in cell division, development, and programmed cell death.
  • Overexpression of eIF4E is observed in multiple human cancers.

Conclusions:

  • eIF4E-mediated translational control is pivotal in tumor formation and metastasis.
  • eIF4E's critical role in oncogenesis and its overexpression in cancers make it a significant therapeutic target.