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Updated: Jul 7, 2026
12:17
Detection and Isolation of Apoptotic Bodies to High Purity
Published on: August 12, 2018
Analysis of apoptosis in cell-free systems
Sean P Cullen1, Alexander U Lüthi, Seamus J Martin
1Molecular Cell Biology Laboratory, Department of Genetics, The Smurfit Institute, Trinity College, Dublin 2, Ireland.
Methods (San Diego, Calif.)
|March 4, 2008
Summary
This study details a versatile cell-free system for analyzing apoptosis. It enables the investigation of caspase activation pathways and the screening of compounds affecting cell death.
Area of Science:
- Cellular Biology
- Biochemistry
- Molecular Biology
Background:
- Cell-free systems have identified key apoptosis regulators like cytochrome c and APAF-1.
- These systems are crucial for studying caspase activation, substrate proteolysis, and DNA fragmentation during apoptosis.
Purpose of the Study:
- To describe a robust cell-free system for analyzing caspase activation and related apoptotic events.
- To demonstrate the system's utility in elucidating caspase activation cascades and substrate processing.
Main Methods:
- Utilized a cell-free system to study apoptosis.
- Triggered caspase activation via APAF-1 apoptosome assembly (cytochrome c/dATP) or granzyme B addition.
- Established the order of caspase activation and characterized the role of individual caspases.
Main Results:
- Successfully analyzed caspase activation sequences in response to different triggers.
- Determined the relative importance of caspases in nuclear events and substrate proteolysis.
- Validated the cell-free system for studying apoptosis-associated molecular mechanisms.
Conclusions:
- The described cell-free system is effective for detailed analysis of caspase activation and apoptosis.
- This system facilitates the screening of compounds that modulate caspase-dependent cell death pathways.
- Cell-free systems are invaluable tools for understanding the molecular intricacies of apoptosis.
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