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Apoptosis Versus Cytotoxicity in HeLa Cells Exposed to Paracetamol
K Ruppová1, M Urbancíková1, L Wsólová1
1Institute of Preventive and Clinical Medicine, Limbová 14, 833 01 Bratislava, Slovakia.
Alternatives to Laboratory Animals : ATLA
|December 4, 2014
Summary
This study demonstrates that flow cytometry can detect apoptosis, a programmed cell death, in HeLa cells treated with paracetamol. Apoptosis was observed within a specific concentration range and timing, distinct from cytotoxicity.
Area of Science:
- Cell Biology
- Toxicology
Background:
- Apoptosis is programmed cell death, distinct from necrosis, characterized by chromatin degradation and volume loss.
- Cell membrane integrity and mitochondrial function are preserved until late stages of apoptosis.
Purpose of the Study:
- To utilize flow cytometry to detect DNA changes indicative of apoptosis in HeLa cells exposed to paracetamol.
- To investigate the relationship between paracetamol concentration, exposure time, and the induction of apoptosis.
Main Methods:
- Flow cytometry was employed to measure propidium iodide binding, assessing DNA changes in HeLa cells.
- Cell morphology and chromatin condensation were analyzed using fluorescent microscopy with acridine orange and ethidium bromide.
Main Results:
- Apoptosis was detected in HeLa cells exposed to 4-5mg/ml paracetamol for 8 hours, followed by a 14-19 hour incubation in fresh medium.
- The peak apoptotic effect was observed 18 hours post-paracetamol exposure.
- Apoptosis induction was independent of cytotoxicity and occurred within a narrow chemical concentration range.
Conclusions:
- Flow cytometry is a viable method for detecting paracetamol-induced apoptosis in cultured cells.
- Apoptosis induction by paracetamol correlates with cell cycle inhibition and coincides with reduced cell proliferation.
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