Related Experiment Video
Updated: May 10, 2026
An Optimized LIVE/DEAD Assay Coupled with Flow Cytometry for Quantifying Post-Stress Survival in Yeast Cells
Published on: August 29, 2025
Quantification of genetically controlled cell death in budding yeast
Xinchen Teng1, J Marie Hardwick
1W. Harry Feinstone Department of Molecular Microbiology and Immunology, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD, USA.
Abstract:
Yeast are the foremost genetic model system. With relative ease, entire chemical libraries can be screened for effects on essentially every gene in the yeast genome. Until recently, researchers focused only on whether yeast were killed by the conditions applied, irrespective of the mechanisms by which they died. In contrast, considerable effort has been devoted to understanding the mechanisms of mammalian cell death. However, most of the methodologies for detecting programmed apoptotic and necrotic death of mammalian cells have not been applicable to yeast. Therefore, we developed a cell death assay for baker's yeast Saccharomyces cerevisiae to identify genes involved in the mechanisms of yeast cell death. Small volumes of yeast suspensions are subjected to a precisely controlled heat ramp, allowing sufficient time for yeast cell factors to suppress or facilitate death, which can be quantified by high-throughput automated analyses. This assay produces remarkably reliable results that typically reflect results with other death stimuli. Here we describe the protocol and its caveats, which can be easily overcome.
Insights
Researchers developed a new assay to study yeast cell death mechanisms. This method uses a controlled heat ramp to quantify cell death, aiding the identification of genes involved in yeast survival and demise.
Area of Science:
- Molecular Biology
- Genetics
- Cell Biology
Background:
- Yeast (Saccharomyces cerevisiae) is a key genetic model organism.
- Previous research on yeast cell death primarily focused on survival outcomes, not mechanisms.
- Mammalian cell death assays are not readily applicable to yeast.
Purpose of the Study:
- To develop a novel cell death assay for Saccharomyces cerevisiae.
- To identify genes regulating yeast cell death pathways.
- To bridge the gap in understanding yeast cell death mechanisms.
Main Methods:
- A precisely controlled heat ramp applied to yeast suspensions.
- Quantification of cell death using high-throughput automated analyses.
- Application to screen chemical libraries for effects on yeast genes.
Main Results:
- The developed assay provides reliable and reproducible results.
- The assay's outcomes correlate with other cell death stimuli.
- Facilitates the identification of genes involved in yeast cell death.
Conclusions:
- The new assay is effective for studying yeast cell death mechanisms.
- It enables high-throughput screening for genes involved in cell demise.
- This tool advances the understanding of Saccharomyces cerevisiae cell biology.
