Neuroimmune signaling: Dopamine release from fat tissue mediates pathogen avoidance.

Dopamine release from fat tissue in Drosophila melanogaster mediates pathogen avoidance by altering odor responses and feeding preferences.

• Why it matters: Understanding how animals rapidly learn to avoid sickening food is crucial for insights into immune and neural interactions that influence survival behaviors.
• What they did: The study examined how ingestion of pathogenic bacteria triggers dopamine release from fat cells, which then modifies odor responses in the fly brain and shifts feeding choices.
• The result: Findings suggest that fat tissue-derived dopamine plays a key role in pathogen avoidance, providing a mechanism for how immune signals influence neural circuits and feeding behavior.