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eIF4E function in somatic cells modulates ageing in Caenorhabditis elegans.

Popi Syntichaki1, Kostoula Troulinaki, Nektarios Tavernarakis

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Summary
This summary is machine-generated.

Loss of the somatic eIF4E isoform (IFE-2) reduces protein synthesis, enhances oxidative stress resistance, and extends lifespan in C. elegans. This finding reveals a novel pathway influencing ageing.

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Area of Science:

  • Molecular Biology
  • Genetics
  • Gerontology

Background:

  • Protein synthesis regulation is vital for cellular functions and is altered during ageing.
  • The eukaryotic initiation factor 4E (eIF4E) is a key regulator of mRNA translation initiation.
  • The role of protein synthesis alterations in ageing is not fully understood.

Purpose of the Study:

  • To investigate the role of the somatic eIF4E isoform (IFE-2) in ageing and lifespan regulation in *C. elegans*.
  • To determine if IFE-2 influences protein synthesis, oxidative stress resistance, and longevity.
  • To explore the interaction of IFE-2 with known ageing pathways.

Main Methods:

  • Genetic manipulation of the IFE-2 isoform in *C. elegans*.
  • Measurement of global protein synthesis rates.
  • Assessment of oxidative stress resistance.
  • Lifespan analysis of wild-type and mutant *C. elegans* strains.
  • Analysis of interactions with DAF-16, TOR, and other ageing pathways.

Main Results:

  • Loss of IFE-2 significantly reduces global protein synthesis.
  • IFE-2 deficiency confers protection against oxidative stress.
  • IFE-2 mutants exhibit extended lifespan, independent of DAF-16.
  • IFE-2 deficiency further enhances lifespan in existing long-lived mutants (daf, clk, eat).
  • Knockdown of TOR synergistically increases longevity in ife-2 mutants.

Conclusions:

  • Somatic eIF4E signaling is a novel pathway that regulates ageing in *C. elegans*.
  • IFE-2 plays a critical role in controlling protein synthesis and influencing lifespan.
  • Targeting eIF4E-mediated translation offers a potential strategy for modulating ageing.