How a Serotonin Drug Affects Eating in Rats
Author Information
Author(s): Lam Daniel D., Zhou Ligang, Vegge Andreas, Xiu Philip Y., Christensen Britt T., Osundiji Mayowa A., Yueh Chen-yu, Evans Mark L., Heisler Lora K.
Primary Institution: University of Cambridge
Hypothesis
Does the serotonin receptor agonist m-chloro-phenylpiperazine (mCPP) enhance the activity of metabolically sensitive neurons in the nucleus of the solitary tract (NTS) and reduce food intake?
Conclusion
The study found that mCPP selectively activates catecholaminergic neurons in the NTS, which is correlated with reduced food intake.
Supporting Evidence
- mCPP significantly reduced food intake in rats compared to saline treatment.
- FOS-IR induction was observed in a specific subregion of the NTS.
- The activation of TH-IR neurons in the NTS was strongly negatively correlated with food intake.
Takeaway
When rats were given a serotonin drug, they ate less because certain brain cells that help control hunger were activated.
Methodology
Rats were treated with varying doses of mCPP, and food intake was measured alongside c-fos immunoreactivity to assess neuronal activation.
Participant Demographics
Adult male Sprague–Dawley rats weighing 280–300 g.
Statistical Information
P-Value
p<0.0001
Statistical Significance
p<0.01
Digital Object Identifier (DOI)
Want to read the original?
Access the complete publication on the publisher's website