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Extracellular signal-regulated kinase in the basolateral amygdala, but not the nucleus accumbens core, is critical for context-response-cocaine memory reconsolidation in rats.
Neuropsychopharmacology. 2013 Apr; 38(5):753-62.N

Abstract

The reconsolidation of cocaine memories following retrieval is necessary for the sustained ability of a cocaine-paired environmental context to elicit cocaine seeking. Extracellular signal-regulated kinase (ERK) is an intracellular signaling molecule involved in nucleus accumbens core (NACc)-mediated reconsolidation of Pavlovian cocaine memories. Here, we used a rodent model of drug context-elicited relapse to test the hypothesis that ERK would be similarly required for the reconsolidation of context-response-cocaine memories that underlie drug context-induced reinstatement of instrumental cocaine-seeking behavior, with a focus on the NACc and on the basolateral amygdala (BLA), another important locus for the reconsolidation of cocaine memories. We show that the mitogen-activated protein kinase (MEK)/ERK1/2 inhibitor, U0126 (1.0 μg/0.5 μl/hemisphere), microinfused bilaterally into the BLA--but not the NACc--immediately after brief re-exposure to a previously cocaine-paired context (that is, cocaine-memory reactivation), significantly attenuated subsequent drug context-induced cocaine seeking relative to vehicle (VEH). This effect in the BLA was associated with a transient inhibition of ERK1/2 phosphorylation, and it depended on memory reactivation given that U0126 administered following exposure to a novel context did not alter subsequent cocaine seeking. Furthermore, similar to U0126, baclofen+muscimol-induced (B+M; 106.8/5.7 ng/0.5 μl/hemisphere) neural inactivation of the NACc, following cocaine-memory reactivation, failed to alter subsequent cocaine seeking. These findings demonstrate that ERK activation in the BLA, but not the NACc, is required for the reconsolidation of context-response-cocaine associative memories. Together with prior research, these results suggest that contextual drug-memory reconsolidation in Pavlovian and instrumental settings involves distinct neuroanatomical mechanisms.

Authors+Show Affiliations

Department of Psychology, University of North Carolina, Chapel Hill, NC 27599-3270, USA.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, N.I.H., Extramural

Language

eng

PubMed ID

23232446

Citation

Wells, Audrey M., et al. "Extracellular Signal-regulated Kinase in the Basolateral Amygdala, but Not the Nucleus Accumbens Core, Is Critical for Context-response-cocaine Memory Reconsolidation in Rats." Neuropsychopharmacology : Official Publication of the American College of Neuropsychopharmacology, vol. 38, no. 5, 2013, pp. 753-62.
Wells AM, Arguello AA, Xie X, et al. Extracellular signal-regulated kinase in the basolateral amygdala, but not the nucleus accumbens core, is critical for context-response-cocaine memory reconsolidation in rats. Neuropsychopharmacology. 2013;38(5):753-62.
Wells, A. M., Arguello, A. A., Xie, X., Blanton, M. A., Lasseter, H. C., Reittinger, A. M., & Fuchs, R. A. (2013). Extracellular signal-regulated kinase in the basolateral amygdala, but not the nucleus accumbens core, is critical for context-response-cocaine memory reconsolidation in rats. Neuropsychopharmacology : Official Publication of the American College of Neuropsychopharmacology, 38(5), 753-62. https://doi.org/10.1038/npp.2012.238
Wells AM, et al. Extracellular Signal-regulated Kinase in the Basolateral Amygdala, but Not the Nucleus Accumbens Core, Is Critical for Context-response-cocaine Memory Reconsolidation in Rats. Neuropsychopharmacology. 2013;38(5):753-62. PubMed PMID: 23232446.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Extracellular signal-regulated kinase in the basolateral amygdala, but not the nucleus accumbens core, is critical for context-response-cocaine memory reconsolidation in rats. AU - Wells,Audrey M, AU - Arguello,Amy A, AU - Xie,Xiaohu, AU - Blanton,Megan A, AU - Lasseter,Heather C, AU - Reittinger,Andrew M, AU - Fuchs,Rita A, Y1 - 2012/11/21/ PY - 2012/12/13/entrez PY - 2012/12/13/pubmed PY - 2013/9/18/medline SP - 753 EP - 62 JF - Neuropsychopharmacology : official publication of the American College of Neuropsychopharmacology JO - Neuropsychopharmacology VL - 38 IS - 5 N2 - The reconsolidation of cocaine memories following retrieval is necessary for the sustained ability of a cocaine-paired environmental context to elicit cocaine seeking. Extracellular signal-regulated kinase (ERK) is an intracellular signaling molecule involved in nucleus accumbens core (NACc)-mediated reconsolidation of Pavlovian cocaine memories. Here, we used a rodent model of drug context-elicited relapse to test the hypothesis that ERK would be similarly required for the reconsolidation of context-response-cocaine memories that underlie drug context-induced reinstatement of instrumental cocaine-seeking behavior, with a focus on the NACc and on the basolateral amygdala (BLA), another important locus for the reconsolidation of cocaine memories. We show that the mitogen-activated protein kinase (MEK)/ERK1/2 inhibitor, U0126 (1.0 μg/0.5 μl/hemisphere), microinfused bilaterally into the BLA--but not the NACc--immediately after brief re-exposure to a previously cocaine-paired context (that is, cocaine-memory reactivation), significantly attenuated subsequent drug context-induced cocaine seeking relative to vehicle (VEH). This effect in the BLA was associated with a transient inhibition of ERK1/2 phosphorylation, and it depended on memory reactivation given that U0126 administered following exposure to a novel context did not alter subsequent cocaine seeking. Furthermore, similar to U0126, baclofen+muscimol-induced (B+M; 106.8/5.7 ng/0.5 μl/hemisphere) neural inactivation of the NACc, following cocaine-memory reactivation, failed to alter subsequent cocaine seeking. These findings demonstrate that ERK activation in the BLA, but not the NACc, is required for the reconsolidation of context-response-cocaine associative memories. Together with prior research, these results suggest that contextual drug-memory reconsolidation in Pavlovian and instrumental settings involves distinct neuroanatomical mechanisms. SN - 1740-634X UR - https://www.unboundmedicine.com/medline/citation/23232446/Extracellular_signal_regulated_kinase_in_the_basolateral_amygdala_but_not_the_nucleus_accumbens_core_is_critical_for_context_response_cocaine_memory_reconsolidation_in_rats_ L2 - https://doi.org/10.1038/npp.2012.238 DB - PRIME DP - Unbound Medicine ER -