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Temperature-dependent induction of thermotolerance by ethanol
Radiation Research
|December 1, 1986
Summary
Ethanol exposure significantly impacts cell survival by altering intracellular water properties, mimicking hyperthermia and inducing thermotolerance in Chinese hamster ovary cells. This explains conflicting research on ethanol
Area of Science:
- Cellular biology
- Biophysics
- Toxicology
Background:
- Ethanol's cytotoxicity and its interaction with temperature are not fully understood.
- Conflicting reports exist regarding ethanol's ability to induce thermotolerance.
Purpose of the Study:
- To investigate the temperature-dependent cytotoxicity of ethanol in Chinese hamster ovary (CHO) cells.
- To elucidate the mechanisms behind ethanol-induced thermotolerance and heat sensitization.
Main Methods:
- Exposure of asynchronous CHO cells to 1 M ethanol at various temperatures (34-39°C).
- Analysis of cell survival curves to assess cytotoxicity and thermotolerance.
- Comparison of ethanol effects with heat treatments alone.
Main Results:
- Ethanol's cytotoxicity is strongly temperature-dependent, with effects mimicking hyperthermia.
- Ethanol induces thermotolerance below 36°C and sensitizes cells to heat.
- Ethanol causes an effective temperature shift of approximately 6.5°C.
Conclusions:
- Ethanol alters intracellular water properties, affecting cytotoxicity and thermotolerance.
- These solvent alterations explain ethanol's impact on cellular response to heat.
- The findings reconcile conflicting literature on ethanol-induced thermotolerance.