Cited by 92Cannabis and Cannabinoid ResearchMemory and Neural MechanismsNeuroscience and Neuropharmacology Research

Cannabinoid transmission in the basolateral amygdala modulates fear memory formation via functional inputs to the prelimbic cortex

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Tan, Huibing, Lauzon, Nicole M., Bishop, Stephanie F., Chi, Ning, Bechard, Melanie, Laviolette, Steven R.·2011·The Journal of Neuroscience

Abstract

The cannabinoid CB1 receptor system is critically involved in the control of associative fear memory formation within the amygdala-prefrontal cortical pathway. The CB1 receptor is found in high concentrations in brain structures that are critical for emotional processing, including the basolateral amygdala (BLA) and the prelimbic division (PLC) of the medial prefrontal cortex (mPFC). However, the precise role of CB1 receptor transmission within the BLA during the processing of fear memory is not fully understood. We examined the potential role of BLA CB1 receptor transmission during an olfactory fear-conditioning procedure in rats by pharmacologically modulating CB1 cannabinoid transmission directly within the BLA. We report that blockade of BLA CB1 receptor transmission prevents the acquisition of associative fear memory, while having no effect on the recall or consolidation of these memories. In contrast, intra-BLA activation of CB1 receptor transmission or blockade of endocannabinoid reuptake strongly potentiated the emotional salience of normally subthreshold fear-conditioning stimuli. In addition, pharmacological inactivation of the mPFC before intra-BLA CB1 activation blocked CB1-receptor-mediated potentiation of fear memory formation. In vivo single-unit electrophysiological recordings within the PLC revealed that modulation of BLA CB1 receptor transmission strongly influences neuronal activity within subpopulations of PLC neurons, with blockade of intra-BLA CB1 receptor transmission inhibiting spontaneous PLC neuronal activity and activation of CB1 receptors producing robust activation, in terms of neuronal firing frequency and bursting activity. Thus, cannabinoid transmission within the BLA strongly modulates the processing of associative fear memory via functional interactions with PLC neuronal populations.

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Crossref · 10.1523/jneurosci.4718-10.2011

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  • Responses to fear cues in mPFC neurons receiving inputs from BLA were potentiated by the CB1R agonist WIN55212-2, and CB1R blockade/inverse agonism with AM251 in these regions disrupts fear learning and learning-related long-term potentiation.

    “Responses to fear cues in mPFC neurons receiving inputs from BLA were potentiated by the CB1R agonist WIN55212-2, and CB1R blockade/inverse agonism (with AM251) in these regions disrupts fear learning and learning-related synaptic plasticity (long-term potentiation) [83–85].”
  • The effects of ECBs on fear are not restricted to the BLA but involve a pathway between the BLA and mPFC.

    “These effects on fear are not restricted to the BLA but involve a pathway between the BLA and mPFC.”

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Authors
Tan, H., Lauzon, N. M., Bishop, S. F., Chi, N., Bechard, M., & Laviolette, S. R.
Affiliations
  • Western University (CA)
  • Natural Sciences and Engineering Research Council of Canada (CA)
Corresponding author
Laviolette, Steven R.
Venue
The Journal of Neuroscience
Published
2011-04-06
Volume
31
Issue
14
Pages
5300-5312
ISSN
  • 0270-6474 (ISSN-L)
  • 1529-2401
OpenAlex
W2054853121
Cited by
92
References
30
Citations by year
2026: 2 · 2025: 2 · 2024: 3 · 2023: 5 · 2022: 5 · 2021: 6 · 2020: 7 · 2019: 3 · 2018: 7 · 2017: 5 · 2016: 8 · 2015: 10 · 2014: 13 · 2013: 6 · 2012: 7
FWCI
6.79
Type
journal article
Language
en
Open access
Locations
  • Journal of Neuroscience (publishedVersion, cc-by-nc-sa)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Health Sciences › Medicine › Pharmacology › Cannabis and Cannabinoid Research
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Memory and Neural Mechanisms
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
Keywords
CB1 receptor, basolateral amygdala, prelimbic cortex, medial prefrontal cortex, olfactory fear conditioning, emotional salience, neuronal firing rate, burst firing, single-unit electrophysiology
MeSH terms
Action Potentials, Afferent Pathways, Amygdala, Analysis of Variance, Animals, Arachidonic Acids, Calcium Channel Blockers, Cannabinoids, Dose-Response Relationship, Drug, Electroshock, Fear, Functional Laterality, Male, Memory, Morpholines, Naphthalenes, Neural Inhibition, Neurons, Piperidines, Pyrazoles, Smell, Rats, Sprague-Dawley, Prefrontal Cortex, Receptor, Cannabinoid, CB1, Benzoxazines, Rats

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