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Heat shock response reduces mortality after severe experimental burns
T N Meyer1, A L da Silva, E C Vieira
1INCIS (Health Sciences Institute), UNICOR (Vale do Rio Verde University), Trés Corações, MG, Brazil.
Summary
Pre-treating rats with heat shock significantly reduced mortality from severe burns. This heat shock response, indicated by heat-shock protein 70, offers protective effects against burn injury in this animal model.
Area of Science:
- Physiology
- Toxicology
- Burn Medicine
Background:
- The heat shock response is known to protect against septic shock and endotoxemia.
- Its protective potential in experimental burns remained largely unexplored.
Purpose of the Study:
- To investigate the protective effects of the heat shock response against experimental burns.
- To test the hypothesis that heat shock can reduce mortality in burn injury models.
Main Methods:
- 115 adult male Fischer rats were divided into four groups: control, heat-shock only, burn only, and heat-shock followed by burn.
- Third-degree burns covering 26-30% of body surface area were induced.
- Mortality rates were recorded at 3, 7, 15, and 25 days post-burn.
- Liver and lung tissues were analyzed for heat-shock protein 70 (HSP70) expression.
Main Results:
- Heat-shock protein 70 was detected in heated animals, confirming the heat shock response.
- No mortality was observed in the control or heat-shock-only groups.
- Heated and subsequently burnt animals exhibited significantly lower mortality rates at all measured time points (days 3, 7, 15, 25) compared to unheated burnt animals (p < 0.05, p < 0.01).
Conclusions:
- Eliciting the heat shock response significantly reduces mortality rates in a rat model of experimental burns.
- Heat shock demonstrates a protective effect against severe burn injury.
- HSP70 expression is a marker for the induced heat shock response and its protective effects.