Source Paper
The Circuitry Mediating Cocaine-Induced Reinstatement of Drug-Seeking Behavior
Krista McFarland, Peter W. Kalivas
Journal of Neuroscience • 2001
View Abstract
The role of limbic-striato-pallidal circuitry in cocaine-induced reinstatement was evaluated. The transient inhibition of brain nuclei associated with motor systems [including the ventral tegmental area (VTA), dorsal prefrontal cortex (dPFC), core of the nucleus accumbens (NAcore), and ventral pallidum (VP)] prevented cocaine-induced reinstatement. However, only the VP proved to be necessary for food reinstatement, suggesting that the identified circuit is specific to drug-related reinstatement. Supporting the possibility that the VTA-dPFC-NAcore-VP is a series circuit mediating reinstatement, simultaneous unilateral microinjection of GABA agonists into the dPFC in one hemisphere and into the VP in the contralateral hemisphere abolished cocaine reinstatement. Although dopamine projections from the VTA innervate all three forebrain nuclei, the blockade of dopamine receptors only in the dPFC antagonized cocaine-induced reinstatement. Furthermore, DA administration into the dPFC was sufficient to elicit a reinstatement in drug-related responding. These data demonstrate that dopamine release in the dPFC initiates a dPFC-NAcore-VP series circuit that mediates cocaine-induced drug-seeking behavior.
Food Reinstatement Testing
Objective: Testing food-induced reinstatement of food-seeking behavior to determine specificity of identified circuit to drug-related reinstatement
Protocol Steps
Food Reinstatement Testing
Conduct food reinstatement testing to evaluate whether brain nuclei necessary for cocaine-induced reinstatement are also necessary for food reinstatement
Note: Only the ventral pallidum (VP) proved to be necessary for food reinstatement, suggesting the identified circuit is specific to drug-related reinstatement
View evidence from paper
“only the VP proved to be necessary for food reinstatement, suggesting that the identified circuit is specific to drug-related reinstatement”