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Updated: May 3, 2026

Author Spotlight: A Streamlined Approach to Studying Cell Death Initiation in Hypersensitive Response
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Multi-parametric analysis of cell death pathways using live-cell microscopy.

Gaurav N Joshi1, David A Knecht

  • 1Department of Molecular and Cell Biology, University of Connecticut, Storrs, Connecticut.

Current Protocols in Toxicology
|February 11, 2014
PubMed
Summary
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Researchers used fluorescent probes and time-lapse microscopy to study programmed cell death pathways. This method allows for detailed, cell-by-cell analysis of the conserved sequence of events during apoptosis.

Area of Science:

  • Cell Biology
  • Biochemistry

Background:

  • Programmed cell death (apoptosis) is a crucial biological process.
  • Understanding apoptosis is vital for numerous physiological and pathological conditions.
  • New apoptotic pathways are continually being discovered.

Purpose of the Study:

  • To detail protocols for real-time imaging of apoptotic cell death pathways.
  • To demonstrate the utility of fluorescent probes and advanced microscopy for studying apoptosis.
  • To analyze the conserved sequence of events in apoptosis on a cell-by-cell basis.

Main Methods:

  • Utilized fluorescent probes to detect biochemical and physiological changes during cell death.
  • Employed time-lapse fluorescence microscopy for real-time, individual cell analysis.
Keywords:
FRETapoptosisfluorescence microscopyimage analysisreal-time imaging

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  • Investigated specific apoptotic pathways using various chemical inducers.
  • Ensured imaging hardware did not compromise cell viability.

    • Main Results:

    • Successfully imaged and analyzed apoptotic events in real-time.
    • Demonstrated that while timing varies, the sequence of apoptotic events is highly conserved across cells.
    • Identified transient cellular changes difficult to detect with population-based methods.

    Conclusions:

    • Real-time, single-cell analysis using fluorescence microscopy provides unprecedented insight into apoptosis.
    • This methodology allows for the detailed characterization of conserved apoptotic pathways.
    • The described protocols and hardware enable robust investigation of cell death mechanisms without affecting cell viability.