Dopamine Sustains 1-Hour Courtship Suppression in Male Fruit Flies After 60-Minute Stress
Updated
Updated · PsyPost · Jun 18
Dopamine Sustains 1-Hour Courtship Suppression in Male Fruit Flies After 60-Minute Stress
3 articles · Updated · PsyPost · Jun 18
Summary
Male fruit flies confined in 3-millimeter chambers for 30 or 60 minutes showed sharply lower courtship, and the drop still persisted 1 hour after a 60-minute stress episode.
Dopamine did not trigger that immediate decline, but it was required to maintain it: blocking dopamine synthesis or transmission let stressed males recover normal courtship by the 1-hour mark.
Three dopamine receptors—Dop1R1, Dop1R2 and Dop2R—and signaling in the mushroom body were needed for the lasting effect, with PAM and PPL1 neuron clusters identified as key inputs.
Longer confinement made the effect far more durable: 7-hour and 24-hour stress exposures suppressed courtship for at least 5 days, while feeding stayed normal and movement recovered within 1 hour after shorter stress.
The study leaves the initial non-dopamine trigger unresolved, pointing to future work on real-time neuron activity and downstream circuits linking confinement stress to reduced sexual motivation.