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Hippocampal regulation of contextual cue-induced reinstatement of cocaine-seeking behavior.
Linköping University, Department of Clinical and Experimental Medicine, Division of Cell Biology. Linköping University, Faculty of Medicine and Health Sciences.ORCID iD: 0000-0002-9673-8442
Department of Psychology, Boston University, Boston, MA 02215, United States.
Department of Psychology, Boston University, Boston, MA 02215, United States.
2008 (English)In: Pharmacology, Biochemistry and Behavior, ISSN 0091-3057, E-ISSN 1873-5177, Vol. 90, no 3, 481-491 p.Article in journal (Refereed) Published
Abstract [en]

Associations between cocaine and cues facilitate development and maintenance of addiction. We hypothesized that the ventral hippocampus is important for acquisition of these associations. Rats were trained to self-administer cocaine, with or without pre-exposure to distinct sets of cocaine- and saline-paired contextual cues. Next, rats were conditioned for 3 days with the distinct sets of contextual cues paired with cocaine and saline along with distinct discrete cues. Vehicle or lidocaine was infused into the ventral hippocampus prior to conditioning sessions. Following extinction, reinstatement of cocaine-seeking behavior was examined following exposure to contextual cues, discrete cues, or their combination. Inactivation of the ventral hippocampus during conditioning blocked acquisition of the association between cocaine and cocaine-paired contextual cues in that only lidocaine-treated rats with short-term cue exposure failed to reinstate responding in the presence of cocaine-paired contextual cues. Lidocaine also prevented rats in both cue exposure groups from discriminating between cocaine- and saline-paired contextual cues during reinstatement tests. Reinstatement induced by cocaine-paired discrete cues or by contextual and discrete cues together was not impaired for either cue exposure condition. The hippocampus is important for acquisition of the association between cocaine and context and in maintaining discrimination between cocaine-relevant and -irrelevant contextual cues.

Place, publisher, year, edition, pages
Philadelphia: Elsevier, 2008. Vol. 90, no 3, 481-491 p.
National Category
Basic Medicine
Identifiers
URN: urn:nbn:se:liu:diva-132795DOI: 10.1016/j.pbb.2008.04.007PubMedID: 18499239OAI: oai:DiVA.org:liu-132795DiVA: diva2:1049745
Available from: 2016-11-25 Created: 2016-11-25 Last updated: 2016-11-29Bibliographically approved

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Atkins, Alison Lynn
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