Hunger recruits a parallel circuit encoding alcohol reward.

Hunger activates a specific octopamine neuron in Drosophila that is essential for ethanol seeking during food deprivation.

• Why it matters: Understanding how internal states like hunger influence alcohol preference is crucial for unraveling mechanisms underlying addiction, cravings, and relapse.
• What they did: The study used intersectional genetic tools and connectome analysis to identify a single octopamine neuron whose activity increases with hunger and is required for ethanol seeking in food-deprived flies.
• The result: Hunger recruits a parallel circuit involving this neuron and its synaptic partners, which modulates memory circuitry to drive learned ethanol preference during deprivation.