Related Experiment Video
Updated: Jul 10, 2026
08:26
Assessing Activity-based Anorexia in Mice
Published on: May 14, 2018
GLP-1 Receptor Agonism Exacerbates Activity-Based Anorexia in Mice
Amit Thakar1, Travis E Brown1, Shane T Hentges1
1Department of Integrative Physiology and Neuroscience, Washington State University, Pullman, Washington, USA.
The International Journal of Eating Disorders
|July 9, 2026
Summary
Glucagon-like peptide-1 receptor (GLP-1R) agonists worsen anorexia nervosa outcomes by increasing weight loss and reducing food intake in a rodent model. These findings caution against using GLP-1R agonists in individuals prone to restrictive eating behaviors.
Area of Science:
- Neuroscience
- Endocrinology
- Eating Disorders Research
Background:
- Glucagon-like peptide-1 receptor (GLP-1R) agonists are known to reduce food intake and body weight.
- Preclinical data suggested GLP-1R agonists might mitigate hyperactivity and reward-seeking behavior, potentially benefiting anorexia nervosa (AN).
- Activity-based anorexia (ABA) is a rodent model used to study AN pathology, characterized by hyperactivity and weight loss.
Purpose of the Study:
- To investigate the effects of GLP-1R agonists on weight loss and hyperactivity in a rodent model of activity-based anorexia (ABA).
- To determine if GLP-1R agonism could attenuate compulsive-like hyperactivity or worsen outcomes in ABA.
Main Methods:
- Female mice were subjected to ABA conditions with running wheel access and restricted feeding.
- Systemic administration of a GLP-1R agonist, antagonist, or vehicle was performed daily before food presentation.
- Key parameters monitored included weight loss, food intake, and wheel running activity.
Main Results:
- GLP-1R agonist treatment significantly exacerbated weight loss in the ABA model.
- This worsening was attributed to further suppressed food intake, with no change in wheel running activity.
- Pharmacological blockade of GLP-1R signaling did not affect ABA parameters compared to controls.
Conclusions:
- GLP-1R agonism worsens outcomes in an animal model of anorexia nervosa, contrary to initial hypotheses.
- Endogenous GLP-1 signaling does not appear to play a significant role in ABA pathology.
- Caution is advised for using GLP-1R agonists in individuals at risk for AN due to potential exacerbation of weight loss and reduced food intake.
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