Repression of oncogenic cap-mediated translation by 4Ei-10 diminishes proliferation, enhances chemosensitivity and alters expression of malignancy-related proteins in mesothelioma

Zeeshan Ahmad, Blake A. Jacobson, Mitchell W. McDonald, Nicolas Vattendahl Vidal, Gabriel Vattendahl Vidal, Sierra Chen, Maxwell Dillenburg, Aniekan M. Okon, Manish R. Patel, Carston R. Wagner, Robert A. Kratzke

Research output: Contribution to journalArticle

Abstract

Activated cap-dependent translation promotes cancer by stimulating translation of mRNAs encoding malignancy-promoting proteins. The nucleoside monophosphate Protide, 4Ei-10, undergoes intracellular uptake and conversion by Hint1 to form 7-Cl-Ph-Ethyl-GMP. 7-Cl-Ph-Ethyl-GMP is an analog of cap and inhibits protein translation by binding and sequestering eIF4E thus blocking eIF4E from binding to the mRNA cap. The effects of inhibiting translation initiation by disruption of the eIF4F complex with 4Ei-10 were examined in malignant mesothelioma (MM). In a cell-free assay system, formation of the eIF4F complex was disabled in response to exposure to 4Ei-10. Treatment of MM with 4Ei-10 resulted in decreased cell proliferation, increased sensitivity to pemetrexed and altered expression of malignancy-related proteins. In light of these findings, suppression of translation initiation by small molecule inhibitors like 4Ei-10 alone or in combination with pemetrexed represents an encouraging strategy meriting further evaluation in the treatment of MM.

Original languageEnglish (US)
Pages (from-to)425-432
Number of pages8
JournalCancer chemotherapy and pharmacology
Volume85
Issue number2
DOIs
StatePublished - Feb 1 2020

Keywords

  • 4Ei-10
  • 7-Cl-Ph-Ethyl-GMP
  • Cap-dependent translation
  • Mesothelioma
  • ProTide
  • eIF4E
  • eIF4G

PubMed: MeSH publication types

  • Journal Article

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