A hypothalamic circuit links hunger to mesolimbic dopamine to drive feeding

AgRP neurons in the hypothalamus are necessary and sufficient to drive hunger-potentiated mesolimbic dopamine responses to food, enabling feeding behavior.

• Why it matters: Hunger increases food motivation, but the neural pathway connecting homeostatic hunger signals to mesolimbic dopamine activity is unclear.
• What they did: The study mapped a hypothalamic-midbrain circuit where AgRP neuron activity reduces inhibitory input to midbrain dopamine neurons and amplifies food-evoked dopamine release via NPY-sensitive paraventricular hypothalamic neurons.
• The result: AgRP-evoked dopamine signaling is required for subsequent food intake, showing how hunger recruits dopamine to convert physiological need into motivated feeding.

AI summary of the abstract · may contain errors · not medical advice · read the paper.