Electroconvulsive shock blocks the opioid-mediated inhibition of dopamine release in rat striatal slices

The fractional release technique was applied to investigate the effects of single electroshock (ECS) on the opioid-mediated inhibition of dopamine release in rat striatal slices. Animals were submitted to ECS 24 h before the experiments. The results demonstrate that pre-treatment with ECS suppresses the inhibition of dopamine release mediated by κ opioid receptors. These data suggest that single ECS treatment modifies the sensitivity of the κ opioid receptors located on the presynatic dopamine terminals in the rat striatum.