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Antiaversive Effects of Cannabinoids : Is the Periaqueductal Gray Involved?
Joint Authors
Terzian, A. L.
Aguiar, D. C.
Guimarães, Fernando S. F.
Lisboa, S. F.
Campos, A. C.
Resstel, L. B.
Moreira, F. A.
Source
Issue
Vol. 2009, Issue 2009 (31 Dec. 2009), pp.1-11, 11 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2008-12-02
Country of Publication
Egypt
No. of Pages
11
Main Subjects
Abstract EN
Cannabinoids play an important role in activity-dependent changes in synaptic activity and can interfere in several brain functions, including responses to aversive stimuli.
The regions responsible for their effects, however, are still unclear.
Cannabinoid type 1 (CB1) receptors are widely distributed in the central nervous system and are present in the periaqueductal gray (PAG), a midbrain structure closely involved in responses related to aversive states.
Accordingly, exposure to stressful stimuli increases endocannabinoid (eCB) levels in the PAG, and local administration of CB1 agonists or drugs that facilitate eCB-mediated neurotransmission produces antinociceptive and antiaversive effects.
To investigate if these drugs would also interfere in animal models that are sensitive to anxiolytic drugs, we verified the responses to intra-PAG injection of CB1 agonists in rats submitted to the elevated plus-maze, the Vogel punished licking test, or contextual aversive conditioning model.
The drugs induced anxiolytic-like effects in all tests.
The same was observed with the transient receptor potential vanilloid type 1 (TRPV1) antagonist capsazepine and with cannabidiol, a nonpsychotomimetic phytocannabinoid that produces anxiolytic-like effects after systemic administration in humans and laboratory animals.
These results, therefore, suggest that the PAG could be an important site for the antiaversive effects of cannabinoids.
American Psychological Association (APA)
Moreira, F. A.& Aguiar, D. C.& Campos, A. C.& Lisboa, S. F.& Terzian, A. L.& Resstel, L. B.…[et al.]. 2008. Antiaversive Effects of Cannabinoids : Is the Periaqueductal Gray Involved?. Neural Plasticity،Vol. 2009, no. 2009, pp.1-11.
https://search.emarefa.net/detail/BIM-486141
Modern Language Association (MLA)
Moreira, F. A.…[et al.]. Antiaversive Effects of Cannabinoids : Is the Periaqueductal Gray Involved?. Neural Plasticity No. 2009 (2009), pp.1-11.
https://search.emarefa.net/detail/BIM-486141
American Medical Association (AMA)
Moreira, F. A.& Aguiar, D. C.& Campos, A. C.& Lisboa, S. F.& Terzian, A. L.& Resstel, L. B.…[et al.]. Antiaversive Effects of Cannabinoids : Is the Periaqueductal Gray Involved?. Neural Plasticity. 2008. Vol. 2009, no. 2009, pp.1-11.
https://search.emarefa.net/detail/BIM-486141
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-486141