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Related Experiment Video

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Studying Age-dependent Genomic Instability using the S. cerevisiae Chronological Lifespan Model

Studying Age-dependent Genomic Instability using the S. cerevisiae Chronological Lifespan Model

Published on: September 29, 2011

Lifespan regulation by evolutionarily conserved genes essential for viability.

Sean P Curran¹, Gary Ruvkun

¹Department of Molecular Biology, Massachusetts General Hospital, Boston, Massachusetts, United States of America.

|April 7, 2007

Summary

Researchers identified 64 essential genes that extend lifespan in C. elegans when inactivated after development. These conserved genes, including those for translation and chromatin, reveal new aging regulation pathways.

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A Suppressor Screen for the Characterization of Genetic Links Regulating Chronological Lifespan in Saccharomyces cerevisiae

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Surveying Low-Cost Methods to Measure Lifespan and Healthspan in Caenorhabditis elegans

Surveying Low-Cost Methods to Measure Lifespan and Healthspan in Caenorhabditis elegans

Published on: May 18, 2022

Area of Science:

Genetics and Molecular Biology
Developmental Biology
Aging Research

Background:

Evolutionary theory predicts aging control mechanisms must have prereproductive functions for natural selection.
Genes crucial for growth and development are highly conserved, but their impact on longevity remains largely unexplored.

Purpose of the Study:

To screen genes essential for Caenorhabditis elegans development for their role in lifespan regulation.
To identify novel genes and pathways that influence aging and longevity.

Main Methods:

A large-scale screen of 2,700 essential genes in C. elegans.
Postdevelopmental inactivation of candidate genes.
Functional classification of identified lifespan-regulating genes.
Analysis of larval arrest and survival phenotypes.

Main Results:

Identified 64 essential genes that significantly extend lifespan upon postdevelopmental inactivation.
These lifespan-extending genes are highly conserved across species (yeast to humans).
Functional analysis revealed enrichment in insulin/metabolic pathways, alongside translation, RNA, and chromatin factors.
Inactivation led to larval arrest in some cases, with arrested larvae exhibiting extended longevity, dependent on daf-16.

Conclusions:

Essential genes involved in development can also regulate aging and longevity.
Novel aging regulators include factors controlling translation, RNA processing, and chromatin.
Insulin-signaling pathways appear to play a role in aging regulation throughout the lifespan.