ArticlePhysiological reports2021
β-endorphin differentially contributes to food anticipatory activity in male and female mice undergoing activity-based anorexia.
Article in Physiological reports, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 11 papers.
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Who cites it
11 citing papers in PubMed, 17 citations in OpenAlex.
- Neural circuits regulating activity-based anorexia.Neuropsychopharmacology : official publication of the American College of Neuropsychopharmacology · 2026Review
- Reduced Ventral Tegmental Area GABA neuron output contributes to hyperactivity in the activity-based anorexia model in female mice.Nature communications · 2025Article
- Endogenous opioid receptors and the feast or famine of maladaptive feeding.Nature communications · 2025Review
- Exploring the role of beta-endorphin in activity-based anorexia in mice.Physiological reports · 2025Article
- Article
- Sex-dependent circadian alterations of both central and peripheral clock genes expression and gut-microbiota composition during activity-based anorexia in mice.Biology of sex differences · 2024Article
- Glial cell changes in the corpus callosum in chronically-starved mice.Journal of eating disorders · 2023Article
- AgRP neurons coordinate the mitigation of activity-based anorexia.Molecular psychiatry · 2023Article
- The Role of Beta-Endorphin in Food Deprivation-Mediated Increases in Food Intake and Binge-Eating.Brain sciences · 2023Article
- Fear and food: Anxiety-like behavior and the susceptibility to weight loss in an activity-based anorexia rat model.Clinical and translational science · 2022Article
- Inhibition of POMC neurons in mice undergoing activity-based anorexia selectively blunts food anticipatory activity without affecting body weight or food intake.American journal of physiology. Regulatory, integrative and comparative physiology · 2022Article
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Authors and funding
2 authors at 1 institution in 1 country.
Funding
Abstract
Anorexia nervosa (AN) has a lifetime prevalence of up to 4% and a high mortality rate (~5-10%), yet little is known regarding the etiology of this disease. In an attempt to fill the gaps in knowledge, activity-based anorexia (ABA) in rodents has been a widely used model as it mimics several key features of AN including severely restricted food intake and excessive exercise. Using this model, a role for the hypothalamic proopiomelanocortin (POMC) system has been implicated in the development of ABA as Pomc mRNA is elevated in female rats undergoing the ABA paradigm. Since the Pomc gene product α-MSH potently inhibits food intake, it could be that elevated α-MSH might promote ABA. However, the α-MSH receptor antagonist SHU9119 does not protect against the development of ABA. Interestingly, it has also been shown that female mice lacking the mu opioid receptor (MOR), the primary receptor activated by the Pomc-gene-derived opioid β-endorphin, display blunted food anticipatory behavior (FAA), a key feature of ABA. Thus, we hypothesized that the elevation in Pomc mRNA observed during ABA may lead to increased β-endorphin concentrations and MOR activation to promote ABA. Further, given the known sex differences in AN and ABA, we hypothesized that MORs may contribute differentially in male and female mice. Using wild-type and MOR knockout mice of both sexes, a MOR antagonist and careful analysis of food anticipatory behavior and β-endorphin levels, we found 1) increased Pomc mRNA levels in both female and male mice that underwent ABA, 2) increased β-endorphin in female mice that underwent ABA, and 3) blunted FAA in both sexes in response to MOR genetic deletion yet blunted FAA only in males in response to MOR antagonism. The results presented provide support for both hypotheses and suggest that it may be the β-endorphin resulting from increased Pomc transcription that supports the development of some features of ABA.
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