Cited by 71Cannabis and Cannabinoid ResearchNeurotransmitter Receptor Influence on BehaviorEstrogen and related hormone effects

Gonadal hormone modulation of the behavioral effects of Δ9-tetrahydrocannabinol in male and female rats

Craft, Rebecca M., Leitl, Michael D.·2008·European Journal of Pharmacology

Abstract

Female rats are more sensitive than males to many behavioral effects of cannabinoids. The purpose of the present study was to determine if sex differences in the antinociceptive and motoric effects of Delta(9)-tetrahydrocannabinol (THC) are due to activational effects of gonadal steroid hormones. THC-induced antinociception (tail withdrawal, paw pressure tests) and motoric effects (horizontal locomotion, catalepsy) were compared in male and female gonadectomized rats that were chronically treated with hormone (testosterone in males, estradiol in females) vs. those that were gonadectomized and had no hormone replacement. THC's effects were also compared between gonadally intact females tested during vaginal estrus vs. diestrus. THC (5 and 10 mg/kg i.p.) produced very similar antinociceptive effects in no-hormone vs. testosterone-treated males, but significantly less locomotor suppression in testosterone-treated males than those with no hormone replacement. In gonadectomized females, estradiol enhanced THC's antinociceptive but not motoric effects. In gonadally intact, cycling females, 5 mg/kg THC produced slightly to significantly greater behavioral effects in estrous than in diestrous females. These results suggest that sex differences in THC-induced behavioral effects in the adult rat can be attributed to activational effects of testosterone in males and/or estradiol in females.

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Registry

Crossref · 10.1016/j.ejphar.2007.09.004

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  • Δ9-tetrahydrocannabinol's efficacy on tail withdrawal and paw pressure tests in rats is enhanced by estradiol.

    “whereas Craft and Leitl [13] found that Δ9-tetrahydrocannabinol’s efficacy on tail withdrawal and paw pressure tests in rats is enhanced by estradiol.”

    From Endocannabinoid involvement in endometriosis. (2010) · cites this paper as [13]

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Authors
Craft, R. M., & Leitl, M. D.
Affiliations
Washington State University (US)
Corresponding author
Craft, Rebecca M.
Venue
European Journal of Pharmacology
Publisher
Elsevier BV
Published
2008-01
Volume
578
Issue
1
Pages
37-42
ISSN
0014-2999 (ISSN-L)
OpenAlex
W1992980559
Cited by
70
References
28
Citations by year
2026: 4 · 2025: 3 · 2024: 3 · 2023: 3 · 2022: 6 · 2021: 3 · 2020: 5 · 2019: 1 · 2018: 5 · 2017: 5 · 2016: 6 · 2015: 4 · 2014: 4 · 2013: 3 · 2012: 3
FWCI
2.23
Type
journal article
Language
en
Open access
closed
Locations
  • European Journal of Pharmacology (publishedVersion)
  • PubMed (publishedVersion)
Funders
National Institute on Drug Abuse
Topics
  • Health Sciences › Medicine › Pharmacology › Cannabis and Cannabinoid Research
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neurotransmitter Receptor Influence on Behavior
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Estrogen and related hormone effects
Keywords
delta-9-tetrahydrocannabinol, cannabinoids, sex differences, gonadal hormones, testosterone, estradiol, gonadectomy, antinociception, catalepsy, locomotor suppression, estrous cycle, diestrus, male rats, female rats
MeSH terms
Animals, Catalepsy, Dose-Response Relationship, Drug, Estradiol, Female, Male, Motor Activity, Orchiectomy, Ovariectomy, Pain, Pain Measurement, Sex Factors, Testosterone, Dronabinol, Rats, Sprague-Dawley, Analgesics, Non-Narcotic, Estrous Cycle, Rats

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