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Related Experiment Video

Updated: Oct 29, 2025

Quantifying Yeast Chronological Life Span by Outgrowth of Aged Cells
12:24

Quantifying Yeast Chronological Life Span by Outgrowth of Aged Cells

Published on: May 6, 2009

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A quantitative yeast aging proteomics analysis reveals novel aging regulators.

Yu Sun1, Ruofan Yu2, Hao-Bo Guo3

  • 1Huffington Center On Aging and Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, 77030, USA.

Geroscience
|July 9, 2021
PubMed
Summary

Calorie restriction (CR) extends lifespan, and this study reveals proteomic similarities between CR and aged cells. These findings suggest CR pathways are active during aging and highlight mitochondrial and proteolytic changes.

Keywords:
AgingCalorie restrictionProteomeSILACYeast

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Area of Science:

  • Gerontology
  • Proteomics
  • Cellular Biology

Background:

  • Calorie restriction (CR) is a proven longevity intervention across species.
  • Understanding the proteomic landscape of aging and CR is crucial for identifying longevity pathways.
  • Previous studies have not fully explored the proteomic shifts associated with CR and aging.

Purpose of the Study:

  • To compare the proteomes of young, aged, and calorie-restricted yeast cells.
  • To identify distinct proteomic signatures associated with cellular aging and CR.
  • To investigate the engagement of CR pathways in aged cells.

Main Methods:

  • Utilized Stable-Isotope Labeling by Amino acids in Cell culture (SILAC) quantitative proteomics.
  • Compared proteomes of yeast cells under normal, CR, and replicative aging conditions.
  • Analyzed proteomic data to identify significant changes in protein abundance and pathways.

Main Results:

  • Discovered distinct proteomic signatures in aged yeast cells.
  • Observed significant proteomic similarities between aged and CR cells, including induced stress response pathways.
  • Identified aberrant changes in mitochondrial membrane proteins and a proteolytic cellular state in old cells.

Conclusions:

  • CR pathways appear to be engaged in aged cells, suggesting conserved mechanisms.
  • Proteomic analysis reveals key differences in aging cells, including mitochondrial dysfunction and increased proteolysis.
  • These findings provide insights into potential genes and pathways influencing longevity.