Cited by 88Pain Mechanisms and TreatmentsCannabis and Cannabinoid ResearchPain Management and Placebo Effect

Reduction in Opioid- and Cannabinoid-Induced Antinociception in Rhesus Monkeys after Bilateral Lesions of the Amygdaloid Complex

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Manning, Barton H., Merin, Noah M., Meng, Ian D., Amaral, David G.·2001·The Journal of Neuroscience

Abstract

The amygdaloid complex is a prominent temporal lobe region that is associated with "emotional" information processing. Studies in the rodent have also recently implicated the amygdala in the processing and modulation of pain sensation, the experience of which involves a considerable emotional component in humans. In the present study, we sought to establish the relevance of the amygdala to pain modulation in humans by investigating the contribution of this region to antinociceptive processes in nonhuman primates. Using magnetic resonance imaging guidance, the amygdaloid complex was lesioned bilaterally in six rhesus monkeys (Macaca mulatta) through microinjection of the neurotoxin ibotenic acid. This procedure resulted in substantial neuronal cell loss in all nuclear subdivisions of this structure. In awake unoperated control monkeys, systemic administration of the prototypical opioid morphine or the cannabinoid receptor agonist WIN55,212-2 produced dose-dependent antinociception on a warm-water tail-withdrawal assay. The antinociceptive effects of each drug were reversible with an appropriate antagonist. In monkeys with bilateral amygdala lesions, however, the antinociceptive effects of each drug were significantly reduced. These results constitute the first causal data demonstrating the necessity of neurons in a specific brain region for the full expression of opioid- and cannabinoid-induced antinociception in the primate. Because our amygdala-lesioned monkeys exhibited both a reduction in antinociception and a reduction in behavioral indices of fear (Emery et al., 2001), the possibility should be considered that, in the primate, "antinociceptive circuitry" and "fear circuitry" overlap at the level of the amygdala.

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Crossref · 10.1523/jneurosci.21-20-08238.2001

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  • In the rhesus monkey warm water tail withdrawal paradigm, AEA, THC, and WIN55,212-2 produce dose-dependent antinociceptive effects.

    “In the rhesus monkey warm water tail withdrawal paradigm, the endogenous cannabinoid arachidonoylethanolamine (anandamide; AEA), the primary active constituent of cannabis Δ 9 -tetrahydrocannabinol (THC), and the high efficacy synthetic cannabinoid receptor agonist WIN55,212-2 produce dose-dependent antinociceptive effects (Manning et al, 2001;Vivian et al, 1998).”

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Research works printed but not linked: 1

  1. Amaral DG, Price JL, Pitkanen A, Carmichael ST (1992) Anatomical organization of the primate amygdaloid complex. In: The amygdala: neurobiological aspects of emotion, memory, and mental dysfunction (Aggleton JP, ed), pp 1-66. New York: Wiley.

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Authors
Manning, B. H., Merin, N. M., Meng, I. D., & Amaral, D. G.
Affiliations
  • Merck & Co., Inc., Rahway, NJ, USA (United States) (US)
  • University of California, Davis (US)
  • University of California, San Francisco (US)
Venue
The Journal of Neuroscience
Published
2001-10-15
Volume
21
Issue
20
Pages
8238-8246
ISSN
  • 0270-6474 (ISSN-L)
  • 1529-2401
OpenAlex
W1723736148
Cited by
88
References
71
Citations by year
2026: 1 · 2024: 2 · 2022: 1 · 2021: 4 · 2020: 6 · 2019: 4 · 2018: 1 · 2017: 3 · 2016: 2 · 2015: 2 · 2014: 3 · 2013: 5 · 2012: 4
FWCI
2.79
Type
journal article
Language
en
Open access
Locations
  • Journal of Neuroscience (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Life Sciences Research Foundation
  • Medical Research Council Canada
  • National Institutes of Health (00169, RR00169)
  • U.S. Public Health Service
  • Medical Research Council
  • National Institute of Mental Health (MH-41479, R01MH041479, R37MH057502, R01MH057502, R37MH041479, MH 57502)
  • National Institute of Neurological Disorders and Stroke (NS 10816, F32NS010816)
  • National Center for Research Resources (P51RR000169, RR-00169)
Topics
  • Health Sciences › Medicine › Physiology › Pain Mechanisms and Treatments
  • Health Sciences › Medicine › Pharmacology › Cannabis and Cannabinoid Research
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Pain Management and Placebo Effect
Keywords
amygdala, antinociception, opioid analgesia, cannabinoid analgesia, morphine, WIN 55,212-2, ibotenic acid lesions, rhesus monkeys, pain modulation, fear circuitry, emotional processing
MeSH terms
Amygdala, Analgesics, Animals, Behavior, Animal, Cannabinoids, Dose-Response Relationship, Drug, Fear, Ibotenic Acid, Macaca mulatta, Magnetic Resonance Imaging, Male, Microinjections, Morphine, Morpholines, Naphthalenes, Narcotics, Neurons, Pain Measurement, Reaction Time, Wakefulness, Benzoxazines

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