Cited by 65Cannabis and Cannabinoid ResearchNeurotransmitter Receptor Influence on BehaviorMedicinal Plant Extracts Effects

Involvement of serotonin-mediated neurotransmission in the dorsal periaqueductal gray matter on cannabidiol chronic effects in panic-like responses in rats

Campos, Alline Cristina, de Paula Soares, Vanessa, Carvalho, Milene C, Ferreira, Frederico Rogerio, Vicente, Maria Adrielle, Brandão, Marcus Lira, Zuardi, Antonio Waldo, Zangrossi, Hélio +1 more·2013·Psychopharmacology

Abstract

Rationale Cannabidiol (CBD) is a non-psychotomimetic constituent of Cannabis sativa plant that promotes antianxiety and anti-panic effects in animal models after acute systemic or intra-dorsal periaqueductal gray (DPAG) administration. However, the effects of CBD repeated administration, and the possible mechanisms involved, in animal models of anxiety- and panic-related responses remain poorly understood.Objective The present study evaluates the role of the serotonergic neurotransmission within the DPAG in the modulation of escape responses of rats chronically treated with CBD.Methods Male Wistar rats received acute or repeated (5 mg/Kg/daily/21 days) administration of CBD and were submitted to the elevated T-maze (ETM). We also investigated if CBD effects on the ETM depend on facilitation of 5-HT1A-mediated neurotransmission in the DPAG. To this latter aim, we verified if these effects would be prevented by intra-DPAG injection of the 5-HT1A receptor antagonist WAY100635 (0.37 nmol/0.2 μL). Also, we verified, by in vivo microdialysis, if CBD chronic treatment increases serotonin (5-HT) release and, by quantitative polymerase chain reaction, if there are changes in 5HT-1A or 5HT-2C mRNA expression in DPAG.Results The results showed that repeated but not acute peripheral administration of CBD decreases escape responses in the ETM, suggesting a panicolytic effect. This treatment did not change 5HT-1A or 5-HT-2C receptor mRNA expression nor modify serotonin extracellular concentrations in the DPAG. CBD effects were prevented by DPAG injection of the 5-HT1A receptor antagonist.Conclusions Together, these findings suggest that repeated treatment with CBD induces anti-panic effects by acting on 5-HT1A receptors in DPAG.

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Crossref · 10.1007/s00213-012-2878-7

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Authors
Campos, A. C., de Paula Soares, V., Carvalho, M. C., Ferreira, F. R., Vicente, M. A., Brandão, M. L., Zuardi, A. W., Zangrossi, H., & Guimarães, F. S.
Affiliations
Universidade de São Paulo (BR)
Corresponding author
Campos, Alline Cristina
Venue
Psychopharmacology
Published
2012-09-25
Volume
226
Issue
1
Pages
13-24
ISSN
  • 0033-3158 (ISSN-L)
  • 1432-2072
OpenAlex
W1971729987
Cited by
65
References
55
Citations by year
2026: 4 · 2025: 3 · 2024: 1 · 2023: 3 · 2022: 7 · 2021: 8 · 2020: 5 · 2019: 4 · 2018: 4 · 2017: 8 · 2016: 7 · 2015: 4 · 2014: 5 · 2013: 2
FWCI
2.58
Type
journal article
Language
en
Open access
closed
Locations
  • Psychopharmacology (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Fundação de Amparo à Pesquisa do Estado de São Paulo
  • Conselho Nacional de Desenvolvimento Científico e Tecnológico
Topics
  • Health Sciences › Medicine › Pharmacology › Cannabis and Cannabinoid Research
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neurotransmitter Receptor Influence on Behavior
  • Health Sciences › Medicine › Complementary and alternative medicine › Medicinal Plant Extracts Effects
Keywords
cannabidiol, dorsal periaqueductal gray, serotonin, 5-HT1A receptor, panic-like behavior, escape behavior, elevated T-maze, WAY-100635, serotonin release, 5-HT2C receptor, anxiety
MeSH terms
Animals, Behavior, Animal, Brain Mapping, Cannabidiol, Dose-Response Relationship, Drug, Male, Synaptic Transmission, Periaqueductal Gray, Serotonin, Polymerase Chain Reaction, Panic Disorder, Rats, Wistar, Microdialysis, Maze Learning, Receptor, Serotonin, 5-HT1A

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