Related Experiment Videos
Adaptation effects on activity-stress ulcers in rats
The Pavlovian Journal of Biological Science
|January 1, 1982
Summary
Prior exposure to restricted feeding or wheel running did not protect rats against stress-induced gastric ulcers. Instead, this experience exacerbated stomach damage and mortality during the activity-stress ulcer procedure.
Area of Science:
- Physiology
- Animal Behavior
- Gastroenterology
Background:
- Stress is a known factor in the development of gastric ulcers.
- Adaptation to environmental stressors can sometimes mitigate negative health outcomes.
Purpose of the Study:
- To investigate if prior experience with restricted feeding or wheel running influences the development of activity-stress ulcers in rats.
- To determine if adaptation occurs to these specific pre-stress conditions.
Main Methods:
- Rats were exposed to either restricted feeding (2 hours/day) or continuous wheel activity (24 hours/day) for 7 or 14 days.
- Following this pre-exposure, rats underwent an activity-stress ulcer procedure (1 hour feeding/day with continuous wheel access).
- Gastric ulceration, severity, and mortality rates were compared between experienced and control groups.
Main Results:
- Neither restricted feeding nor wheel running experience attenuated gastric ulceration.
- Rats with prior experience showed increased mortality rates.
- Experienced rats exhibited more frequent and severe stomach damage compared to controls.
Conclusions:
- Pre-exposure to restricted feeding or wheel running does not induce adaptation against activity-stress ulcers.
- These experiences may actually increase susceptibility to stress-induced gastric damage and mortality.