Quantitative Analysis of Apoptosis and Necrosis in Live Cells Using Flow Cytometry

Area of Science:

• Cellular Biology
• Biochemistry
• Immunology

Background:

• Apoptosis and necrosis are distinct cell death pathways, with apoptosis being programmed and non-inflammatory, while necrosis is often triggered by external stimuli and can cause inflammation.
• Recent research indicates overlapping biochemical events in both apoptosis and necrosis, complicating single-cell level differentiation with existing assays.

Purpose of the Study:

• To develop and present a novel methodology for accurately discriminating between apoptotic and necrotic cells.
• To establish a reliable method for distinguishing these two fundamental cell death processes at the single-cell level.

Main Methods:

• Development of a stable cell line engineered with a genetically encoded probe for caspase activation detection.
• Utilizing DsRed targeted to mitochondria as a reporter.
• Employing a multiparametric flow cytometry approach for cell death discrimination.

Main Results:

• Successfully established a cell system for differentiating apoptosis and necrosis.
• Demonstrated the efficacy of the multiparametric flow cytometry approach in distinguishing these cell death types.
• Provided a detailed methodology for researchers to apply.

Conclusions:

• The developed methodology offers a robust and precise way to discriminate between apoptosis and necrosis.
• This advancement aids in understanding cell death mechanisms and their implications in various biological contexts.
• The new approach addresses the limitations of current assays in distinguishing these critical cellular events.