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Related Experiment Video

Updated: May 28, 2025

Studying Food Reward and Motivation in Humans
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Understanding the desire for dessert.

Sadaf Farooqi1

  • 1Institute of Metabolic Science, University of Cambridge, Cambridge, UK.

Science (New York, N.Y.)
|February 13, 2025
PubMed
Summary

Scientists discovered a specific neural circuit in mice that drives their desire for sugary foods, particularly after eating. This finding sheds light on the brain

Area of Science:

  • Neuroscience
  • Animal Behavior
  • Physiology

Background:

  • Post-meal food intake, especially of palatable items like sugar, is a complex behavior.
  • Understanding the neural underpinnings of appetite regulation and food preference is crucial for metabolic health research.

Purpose of the Study:

  • To identify the specific neural circuits in the brain responsible for mediating the preference for high-sugar foods after a meal in mice.
  • To elucidate the mechanisms by which post-meal satiety signals interact with reward pathways to influence food choices.

Main Methods:

  • Utilized in vivo electrophysiology and calcium imaging in awake, behaving mice to monitor neural activity in relevant brain regions.
  • Employed optogenetic and chemogenetic techniques to precisely control the activity of specific neuronal populations.

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  • Conducted behavioral assays to quantify sugar preference and intake in mice under various physiological conditions.

    • Main Results:

    • Identified a distinct neural circuit that becomes active after a meal and specifically promotes the seeking of high-sugar foods.
    • Demonstrated that activating this circuit increases sugar preference, while inhibiting it reduces this preference.
    • Showed that this circuit integrates signals related to satiety and reward to modulate post-meal feeding behavior.

    Conclusions:

    • A specific neural circuit in mice plays a critical role in mediating the preference for high-sugar foods after a meal.
    • This circuit represents a potential target for understanding and potentially modulating appetite and food choices related to metabolic disorders.