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Working-for-Food Behaviors: A Preclinical Study in Prader-Willi Mutant Mice
Glenda Lassi1, Silvia Maggi1, Edoardo Balzani1
1Neuroscience and Brain Technologies Department, Istituto Italiano di Tecnologia, 16163 Genova, Italy.
Genetics
|September 28, 2016
Summary
Mice with Prader-Willi syndrome (PWS) mutations exhibit altered timing in food-seeking behaviors. This delay surprisingly improves their performance and decision-making in tasks, offering new insights into PWS.
Area of Science:
- Neuroscience
- Genetics
- Behavioral Biology
Background:
- Abnormal feeding behavior is a hallmark symptom of Prader-Willi syndrome (PWS).
- Understanding the genetic and cognitive underpinnings of PWS feeding abnormalities is crucial.
Purpose of the Study:
- To investigate the impact of a specific genetic deletion (Snord116) associated with PWS on feeding-related behaviors in a mouse model.
- To analyze temporal processing and decision-making in PWS mutant mice within a food-rewarded task.
Main Methods:
- Utilized a mouse model with a paternally inherited deletion of the small nucleolar RNA 116 (Snord116), mimicking aspects of PWS.
- Assessed behavioral responses to working-for-food tasks across different timescales (hour-scale and seconds-to-minutes-scale).
Main Results:
- PWS mutant mice displayed a significant delay in responding to time intervals compared to wild-type controls.
- This timing deficit correlated with enhanced performance in the working-for-food task.
- Mutant mice demonstrated improved decision-making capabilities in the tested behavioral paradigm.
Conclusions:
- The study reveals a novel temporal organization of feeding behavior in PWS.
- Findings suggest a complex interplay between metabolic dysfunction and cognitive mechanisms in PWS.
- Altered timing responses may contribute to unique behavioral adaptations in PWS.
