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Charline Lasfargues1, Yvan Martineau, Corinne Bousquet

  • 1INSERM UMR-1037 Université de Toulouse, Centre de Recherche en Cancérologie de Toulouse (CRCT) and Laboratoire d'Excellence Toulouse Cancer, TOUCAN, Toulouse 31432, France. stephane.pyronnet@inserm.fr.

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Cellular stress globally reduces protein synthesis by altering translation initiation factors. However, this process selectively allows the expression of proteins crucial for cell survival or apoptosis during prolonged stress.

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Area of Science:

  • Molecular Biology
  • Cellular Stress Response
  • Protein Synthesis Regulation

Background:

  • Cellular stress triggers a general inhibition of protein synthesis.
  • This inhibition is mediated by modifications to translation initiation factors.
  • Selective mRNA translation is increasingly recognized as a key regulatory mechanism.

Purpose of the Study:

  • To review modifications affecting canonical translation initiation factors.
  • To summarize evidence for selective mRNA translation under stress.
  • To highlight the role of selective translation in cell fate decisions.

Main Methods:

  • Literature review of studies on translation initiation factors.
  • Analysis of data on mRNA selective translation during stress.
  • Synthesis of findings on proteins involved in cell survival and apoptosis.

Main Results:

  • Stress-induced modifications inhibit key translation initiation factors.
  • Specific mRNAs encoding survival or apoptosis proteins are selectively translated.
  • This selective translation allows cells to adapt or execute programmed cell death.

Conclusions:

  • Altered translation initiation is a critical control point in stress response.
  • Selective mRNA translation dictates protein expression for cell survival or apoptosis.
  • Understanding these mechanisms offers insights into cellular adaptation and death pathways.