Related Experiment Videos
Amylin decreases meal size in rats
T A Lutz1, N Geary, M M Szabady
1Institute of Veterinary Physiology, University of Zurich, Switzerland. tomlutz@vetphys.unizh.ch
Physiology & Behavior
|December 1, 1995
Summary
Amylin, a peptide hormone, reduces food intake in rats by decreasing meal size and duration. This suggests amylin plays a role in promoting satiety and regulating appetite.
Area of Science:
- Neuroscience
- Endocrinology
- Behavioral Science
Background:
- Amylin is a peptide hormone co-secreted with insulin.
- Its role in appetite regulation is not fully understood.
- Previous studies suggest potential involvement in satiety.
Purpose of the Study:
- To investigate the effects of amylin on feeding behavior in rats.
- To determine if amylin influences meal size, duration, or satiety.
Main Methods:
- Adult male rats were administered amylin intraperitoneally or via hepatic portal infusion.
- Feeding behavior was monitored using a computerized system.
- Conditioned taste aversion tests were employed.
Main Results:
- Amylin administration reduced the size of the first meal in food-deprived and undeprived rats.
- Hepatic portal infusions of amylin decreased meal size and duration, increasing satiety.
- Amylin did not affect feeding rate or subsequent meals, nor did it induce taste aversion.
Conclusions:
- Amylin inhibits feeding primarily by enhancing satiety signals.
- These findings suggest amylin as a potential therapeutic target for appetite control.