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Replicative cell senescence is a property of cells that allows them to divide a finite number of times throughout the organism's lifespan while preventing excessive proliferation. Replicative senescence is associated with the gradual loss of the telomere — short, repetitive DNA sequences found at the end of the chromosomes. Telomeres are bound by a group of proteins to form a protective cap on the ends of chromosomes. Embryonic stem cells express telomerase — an enzyme that adds the telomeric...
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Lipid Supplementation for Longevity and Gene Transcriptional Analysis in Caenorhabditis elegans
07:25

Lipid Supplementation for Longevity and Gene Transcriptional Analysis in Caenorhabditis elegans

Published on: December 9, 2022

FOXO flips the longevity SWItch.

Ashley E Webb1, Anne Brunet

  • 1Department of Genetics, Stanford University, Stanford, California 94305, USA.

Nature Cell Biology
|May 3, 2013
PubMed
Summary
This summary is machine-generated.

Forkhead box O (FOXO) transcription factors extend lifespan by recruiting the SWI/SNF chromatin remodeler to target genes. This mechanism is crucial for stress resistance and longevity in C. elegans.

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Area of Science:

  • Molecular Biology
  • Genetics
  • Aging Research

Background:

  • Forkhead box O (FOXO) transcription factors are known to promote longevity across diverse species, from worms to mammals.
  • However, the precise molecular mechanisms underlying FOXO-mediated lifespan extension have remained largely unknown.

Purpose of the Study:

  • To elucidate the molecular mechanisms by which FOXO transcription factors confer stress resistance and longevity.
  • To investigate the role of chromatin remodeling in FOXO's function.

Main Methods:

  • Utilized the nematode Caenorhabditis elegans as a model organism.
  • Investigated the interaction between FOXO and the SWI/SNF nucleosome remodeling complex.
  • Analyzed the recruitment of SWI/SNF to FOXO target genes.

Main Results:

  • Demonstrated that FOXO transcription factors recruit the SWI/SNF nucleosome remodeling complex to their target genes.
  • Showed that this recruitment is essential for FOXO to induce stress resistance.
  • Confirmed the necessity of this interaction for FOXO-mediated longevity.

Conclusions:

  • The recruitment of the SWI/SNF complex by FOXO is a key mechanism for promoting stress resistance and extending lifespan.
  • This finding provides a novel molecular insight into the function of FOXO transcription factors in aging.