Cited by 44Cannabis and Cannabinoid ResearchPain Mechanisms and TreatmentsNeuropeptides and Animal Physiology

Effects of Alterations in Cannabinoid Signaling, Alone and in Combination with Morphine, on Pain-Elicited and Pain-Suppressed Behavior in Mice

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Miller, Laurence L., Picker, Mitchell J., Umberger, Michael D., Schmidt, Karl T., Dykstra, Linda A.·2012·The Journal of Pharmacology and Experimental Therapeutics

Abstract

Inhibitors of fatty acid amide hydrolase (FAAH) and anandamide (AEA) uptake, which limit the degradation of endogenous cannabinoids, have received interest as potential therapeutics for pain. There is also evidence that endogenous cannabinoids mediate the antinociceptive effects of opioids. Assays of pain-elicited and pain-suppressed behavior have been used to differentiate the effects of drugs that specifically alter nociception from drugs that alter nociception caused by nonspecific effects such as catalepsy or a general suppression of activity. Using such procedures, this study examines the effects of the direct cannabinoid type 1 (CB1) agonist (-)-cis-3-[2-hydroxy-4-(1,1-dimethylheptyl)phenyl]-trans-4-(3-hydroxypropyl)cyclohexanol (CP55940), the FAAH inhibitor cyclohexylcarbamic acid 3'-carbamoylbiphenyl-3-yl ester (URB597), and the AEA uptake inhibitor N-(4-hydroxyphenyl) arachidonylamide (AM404). Additional experiments examined these compounds in combination with morphine. CP55940 produced antinociception in assays of pain-elicited, but not pain-suppressed, behavior and disrupted responding in an assay of schedule-controlled behavior. URB597 and AM404 produced antinociception in assays of pain-elicited and pain-suppressed behavior in which acetic acid was the noxious stimulus, but had no effect on the hotplate and schedule-controlled responding. CP55940 in combination with morphine resulted in effects greater than those of morphine alone in assays of pain-elicited and scheduled-controlled behavior but not pain-suppressed behavior. URB597 in combination with morphine resulted in enhanced morphine effects in assays of pain-elicited and pain-suppressed behavior in which diluted acetic acid was the noxious stimulus, but did not alter morphine's effects on the hotplate or schedule-controlled responding. These studies suggest that, compared with direct CB1 agonists, manipulations of endogenous cannabinoid signaling have enhanced clinical potential; however, their effects depend on the type of noxious stimulus.

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Authors
Miller, L. L., Picker, M. J., Umberger, M. D., Schmidt, K. T., & Dykstra, L. A.
Affiliations
University of North Carolina at Chapel Hill (US)
Venue
The Journal of Pharmacology and Experimental Therapeutics
Publisher
Elsevier BV
Published
2012-07
Volume
342
Issue
1
Pages
177-187
ISSN
0022-3565 (ISSN-L)
OpenAlex
W2166159921
Cited by
44
References
51
Citations by year
2026: 1 · 2025: 1 · 2024: 3 · 2023: 1 · 2021: 4 · 2020: 1 · 2019: 4 · 2018: 3 · 2017: 2 · 2016: 5 · 2015: 9 · 2014: 3 · 2013: 3
FWCI
3.53
Type
journal article
Language
en
Open access
Locations
  • Journal of Pharmacology and Experimental Therapeutics (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • Carolina Digital Repository (University of North Carolina at Chapel Hill) (submittedVersion)
  • UNC Libraries
Funders
  • National Institutes of Health (DA007244)
  • National Institute on Drug Abuse (F31DA025446, R01DA002749, T32DA007244)
Topics
  • Health Sciences › Medicine › Pharmacology › Cannabis and Cannabinoid Research
  • Health Sciences › Medicine › Physiology › Pain Mechanisms and Treatments
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuropeptides and Animal Physiology
Keywords
endocannabinoid system, cannabinoid signaling, morphine, antinociception, CB1 receptor agonists, CP55,940, URB597, fatty acid amide hydrolase inhibitors, AM404, opioid-cannabinoid interaction, acetic acid-induced writhing, schedule-controlled behavior, hot plate test, analgesic drug development
MeSH terms
Fatty Acid Amide Hydrolases, Amidohydrolases, Analgesics, Animals, Arachidonic Acids, Benzamides, Carbamates, Cyclohexanols, Male, Mice, Inbred C57BL, Morphine, Pain, Receptor, Cannabinoid, CB1, Mice, Polyunsaturated Alkamides, Nociception, Cannabinoid Receptor Modulators, Endocannabinoids

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