How Ghrelin Affects Appetite Through Cannabinoids
Author Information
Author(s): Kola Blerina, Farkas Imre, Christ-Crain Mirjam, Wittmann Gábor, Lolli Francesca, Amin Faisal, Harvey-White Judith, Liposits Zsolt, Kunos George, Grossman Ashley B., Fekete Csaba, Korbonits Márta
Primary Institution: Barts and the London School of Medicine and Dentistry, University of London
Hypothesis
The appetite-inducing effects of ghrelin are mediated by the endogenous cannabinoid system.
Conclusion
Ghrelin's ability to stimulate appetite and activate AMPK in the hypothalamus requires an intact cannabinoid signaling pathway.
Supporting Evidence
- Ghrelin significantly increased food intake in wild-type mice but not in CB1-knockout mice.
- Ghrelin stimulated AMPK activity in wild-type mice, indicating a role in energy regulation.
- Administration of rimonabant blocked the effects of ghrelin on appetite and AMPK activity.
- Ghrelin increased endocannabinoid levels in the hypothalamus of wild-type mice.
- Electrophysiological studies showed that ghrelin inhibited excitatory inputs in parvocellular neurons.
Takeaway
Ghrelin is a hormone that makes you hungry, and it works by using a system in your brain that also responds to cannabis.
Methodology
The study used wild-type and CB1-knockout mice to assess the effects of ghrelin on food intake, AMPK activity, and endocannabinoid content.
Limitations
The study primarily focused on male mice, which may limit the generalizability of the findings to other populations.
Participant Demographics
Adult male wild-type and CB1-knockout mice aged 30-35g.
Statistical Information
P-Value
0.0024
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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