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Updated: Jul 7, 2026
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Quantifying Yeast Chronological Life Span by Outgrowth of Aged Cells
Published on: May 6, 2009
A method for high-throughput quantitative analysis of yeast chronological life span
Christopher J Murakami1, Christopher R Burtner, Brian K Kennedy
1Department of Pathology, University of Washington, Box 357470, Seattle, WA 98195-7470, USA.
Summary
Yeast chronological aging can be measured with a new high-throughput method. Dietary restriction, amino acid levels, and osmolarity extend yeast lifespan, independent of sirtuin proteins.
Area of Science:
- Yeast biology
- Aging research
- Cellular senescence
Background:
- Chronological aging in yeast is studied in stationary phase cultures.
- Growth medium composition significantly impacts yeast lifespan.
- Dietary restriction, like reduced glucose, extends yeast life span.
Purpose of the Study:
- To develop a novel high-throughput method for measuring yeast chronological lifespan.
- To assess the impact of growth medium composition on yeast aging.
- To investigate the role of sirtuins in lifespan extension.
Main Methods:
- Utilized a Bioscreen C MBR machine for high-throughput monitoring.
- Measured yeast chronological lifespan by observing cell outgrowth.
- Compared survival data with traditional methods, noting reduced variability.
Main Results:
- The novel method provides comparable survival data to traditional techniques with less variability.
- Reduced glucose concentration (dietary restriction) extends yeast chronological lifespan.
- Elevated amino acid levels or increased osmolarity also suffice to extend lifespan.
Conclusions:
- The new method offers a reliable and efficient way to study yeast aging.
- Dietary restriction, amino acid availability, and osmolarity are key regulators of yeast lifespan.
- Yeast lifespan extension via dietary restriction does not depend on the five sirtuin proteins.
