A virtual rat for simulating environmental and exertional heat stress

Area of Science:

• Physiology
• Computational Biology
• Environmental Health

Background:

• Severe heat stress can cause organ dysfunction.
• Understanding organ thermal response is crucial for heat-stress management.

Purpose of the Study:

• To simulate various heat-stress scenarios using a virtual rat model.
• To determine organ-specific thermal responses under different heat-stress conditions.

Main Methods:

• Utilized a validated virtual rat model for spatiotemporal temperature distribution.
• Simulated environmental heat stress, exertional heat stress, circadian effects, and whole-body cooling.

Main Results:

• Simulations accurately predicted in vivo temperature measurements.
• The liver consistently showed the highest temperatures under heat stress.
• Organ temperatures increased with external temperature and exercise intensity.
• Circadian rhythms and insufficient cooling impacted organ temperatures.

Conclusions:

• The virtual rat model effectively simulates heat stress responses.
• Differential organ thermal responses highlight the liver's susceptibility.
• Findings support optimized experimental designs and improved heat-stress mitigation strategies.