Caspase I-related protease inhibition retards the execution of okadaic acid- and camptothecin-induced apoptosis and PAI-2 cleavage, but not commitment to cell death in HL-60 cells
1999
Caspase I Inhibition and Apoptosis in HL-60 Cells
publication
Author Information
Author(s): Jensen P H, Fladmark K E, Gjertsen B T, Vintermyr O K
Primary Institution: Department of Medical Biochemistry, Aarhus University
Hypothesis
Caspase I selective protease inhibition affects the execution of apoptosis induced by okadaic acid and camptothecin.
Conclusion
Caspase I inhibition can delay certain aspects of apoptosis without preventing the overall commitment to cell death.
Supporting Evidence
- PAI-2 cleavage was observed 9 hours after exposure to okadaic acid.
- In camptothecin-treated cells, PAI-2 cleavage was detectable after 2 hours.
- Caspase I inhibition delayed internucleosomal DNA fragmentation.
Takeaway
This study shows that blocking a specific enzyme can slow down cell death caused by certain drugs, but it doesn't stop the cells from dying.
Methodology
The study involved treating HL-60 cells with okadaic acid and camptothecin and observing the effects on apoptosis and PAI-2 cleavage.
Digital Object Identifier (DOI)
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