Activation of amygdaloid PKC pathway is necessary for conditioned cues-provoked cocaine memory performance

Yu Ting Lai, Hsin Yi Fan, Chianfang G. Cherng, Chih Yuan Chiang, Gour Shenq Kao, Lung Yu

Research output: Contribution to journalArticle

27 Citations (Scopus)

Abstract

Drug-associated cues are critical in reinstating the drug taking behavior even during prolonged abstinence and thus are thought to be a key factor to induce drug craving and to cause relapse. Amygdaloid complex has been known for its physiological function in mediating emotional experience storage and emotional cues-regulated memory retrieval. This study was undertaken to examine the role of basolateral nuclei of amygdala and the intracellular signaling molecule in drug cues-elicited cocaine memory retrieval. Systemic anisomycin treatment prior to the retrieval test abolished the cues-provoked cocaine conditioned place preference (CPP) memory. Likewise, a similar blockade of cues-provoked cocaine CPP performance was achieved by infusion of anisomycin and cycloheximide into the basolateral nuclei of amygdala before the test. Intra-amygdaloid infusion of H89, a protein kinase A inhibitor, or U0126, a MEK inhibitor, did not affect retrieval of the cues-elicited cocaine CPP memory. In contrast, intra-amygdaloid infusion of NPC 15437, a PKC inhibitor, abolished the cues-elicited cocaine CPP expression, while left the memory per se intact. Intra-amygdaloid infusion of NPC 15437 did not seem to affect locomotor activity or exert observable aversive effect. Taken together, our results suggest that activation of PKC signaling pathway and probably downstream de novo protein synthesis in the basolateral nuclei of amygdala is required for the cues-elicited cocaine memory performance. However, temporary inhibition of this signaling pathway does not seem to affect cocaine CPP memory per se.

Original languageEnglish
Pages (from-to)164-170
Number of pages7
JournalNeurobiology of Learning and Memory
Volume90
Issue number1
DOIs
Publication statusPublished - 2008 Jul 1

Fingerprint

Cocaine
Cues
Amygdala
Anisomycin
Pharmaceutical Preparations
Mitogen-Activated Protein Kinase Kinases
Cycloheximide
Locomotion
Protein Kinase Inhibitors
Cyclic AMP-Dependent Protein Kinases
Recurrence
Basolateral Nuclear Complex
Proteins

All Science Journal Classification (ASJC) codes

  • Behavioral Neuroscience
  • Cognitive Neuroscience
  • Experimental and Cognitive Psychology

Cite this

Lai, Yu Ting ; Fan, Hsin Yi ; Cherng, Chianfang G. ; Chiang, Chih Yuan ; Kao, Gour Shenq ; Yu, Lung. / Activation of amygdaloid PKC pathway is necessary for conditioned cues-provoked cocaine memory performance. In: Neurobiology of Learning and Memory. 2008 ; Vol. 90, No. 1. pp. 164-170.
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Activation of amygdaloid PKC pathway is necessary for conditioned cues-provoked cocaine memory performance. / Lai, Yu Ting; Fan, Hsin Yi; Cherng, Chianfang G.; Chiang, Chih Yuan; Kao, Gour Shenq; Yu, Lung.

In: Neurobiology of Learning and Memory, Vol. 90, No. 1, 01.07.2008, p. 164-170.

Research output: Contribution to journalArticle

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