Ghrelin signaling in the ventral tegmental area mediates both reward-based feeding and fasting-induced hyperphagia on high-fat diet.
Quick Facts
What This Study Found
Microinjection of ghrelin into the VTA dose-dependently increased reward-based feeding and fasting-induced hyperphagia on a high-fat diet in rats, resulting in significant 24-hour body weight gain. These effects were blocked by the ghrelin receptor antagonist D-Lys3-GHRP-6, demonstrating that ghrelin signaling in the VTA mediates both hedonic and hunger-driven overeating.
Key Numbers
How They Did This
Rats were conditioned to restricted feeding schedules and given intra-VTA microinjections of varying doses of ghrelin or a ghrelin receptor antagonist. Food intake of high-fat diet and body weight changes were measured under sated and fasting conditions to assess ghrelin's effects on feeding behavior.
Why This Research Matters
Understanding how ghrelin in the brain's reward centers drives overeating of high-fat foods can help develop targeted treatments for obesity and related eating disorders by modulating this pathway.
What This Study Doesn't Tell Us
The study was conducted in rats, so results may not fully translate to humans. The exact neural circuits downstream of VTA ghrelin signaling were not explored in detail.
Trust & Context
- Original Title:
- Ghrelin signaling in the ventral tegmental area mediates both reward-based feeding and fasting-induced hyperphagia on high-fat diet.
- Published In:
- Neuroscience, 300, 53-62 (2015)
- Database ID:
- RPEP-02833
Evidence Hierarchy
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Cite This Study
https://rethinkpeptides.com/research/RPEP-02833APA
Wei, X J; Sun, B; Chen, K; Lv, B; Luo, X; Yan, J Q. (2015). Ghrelin signaling in the ventral tegmental area mediates both reward-based feeding and fasting-induced hyperphagia on high-fat diet.. Neuroscience, 300, 53-62. https://doi.org/10.1016/j.neuroscience.2015.05.001
MLA
Wei, X J, et al. "Ghrelin signaling in the ventral tegmental area mediates both reward-based feeding and fasting-induced hyperphagia on high-fat diet.." Neuroscience, 2015. https://doi.org/10.1016/j.neuroscience.2015.05.001
RethinkPeptides
RethinkPeptides Research Database. "Ghrelin signaling in the ventral tegmental area mediates bot..." RPEP-02833. Retrieved from https://rethinkpeptides.com/research/wei-2015-ghrelin-signaling-in-the
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Study data sourced from PubMed, a service of the U.S. National Library of Medicine, National Institutes of Health.
This study breakdown was produced by the RethinkPeptides research team. We analyze and report published research findings without making health recommendations. All interpretations are based solely on the published abstract and study data.