alexa Role of the prefrontal cortex and nucleus accumbens in reinstating methamphetamine seeking.
Psychiatry

Psychiatry

Journal of Addiction Research & Therapy

Author(s): Rocha A, Kalivas PW

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Abstract Although the involvement of the medial prefrontal cortex projection to the nucleus accumbens in the reinstatement of cocaine seeking has been well studied, it is not known if this projection plays a similar role in the reinstatement of cue- and methamphetamine-induced drug seeking in animals extinguished from methamphetamine self-administration. Accordingly, following extinction from long-access methamphetamine self-administration, rats were bilaterally microinjected with either a combination of the GABA agonists baclofen/muscimol or vehicle (artificial cerebrospinal fluid) into the infralimbic or prelimbic subcompartments of the medial prefrontal cortex or into the shell or core subcompartments of the nucleus accumbens. Similar to cocaine seeking, inactivation of either the prelimbic cortex or accumbens core eliminated cue- and methamphetamine-induced reinstatement, and inactivation of neither the infralimbic cortex nor shell subcompartments inhibited methamphetamine-induced drug seeking. However, in contrast to previous reports with cocaine, cue-induced reinstatement of methamphetamine seeking was inhibited by inactivation of the infralimbic cortex. In conclusion, although a primary role in reinstated drug seeking by the prelimbic and the accumbens core is similar between cocaine and methamphetamine, the recruitment of the infralimbic cortex by conditioned cues differs between these two psychostimulant drugs.
This article was published in Eur J Neurosci and referenced in Journal of Addiction Research & Therapy

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