Cited by 345Cannabis and Cannabinoid ResearchNeurotransmitter Receptor Influence on BehaviorStress Responses and Cortisol

Chronic Δ9-Tetrahydrocannabinol During Adolescence Provokes Sex-Dependent Changes in the Emotional Profile in Adult Rats: Behavioral and Biochemical Correlates

Rubino, Tiziana, Vigano', Daniela, Realini, Natalia, Guidali, Cinzia, Braida, Daniela, Capurro, Valeria, Castiglioni, Chiara, Cherubino, Francesca +4 more·2008·Neuropsychopharmacology

Abstract

Few and often contradictory reports exist on the long-term neurobiological consequences of cannabinoid consumption in adolescents. The endocannabinoid system plays an important role during the different stages of brain development as cannabinoids influence the release and action of different neurotransmitters and promote neurogenesis. This study tested whether long-lasting interference by cannabinoids with the developing endogenous cannabinoid system during adolescence caused persistent behavioral alterations in adult rats. Adolescent female and male rats were treated with increasing doses of Delta(9)-tetrahydrocannabinol (THC) for 11 days (postnatal day (PND) 35-45) and left undisturbed until adulthood (PND 75) when behavioral and biochemical assays were carried out. CB1 receptor level and CB1/G-protein coupling were significantly reduced by THC exposure in the amygdala (Amyg), ventral tegmental area (VTA) and nucleus accumbens (NAc) of female rats, whereas male rats had significant alterations only in the amygdala and hippocampal formation. Neither female nor male rats showed any changes in anxiety responses (elevated plus maze and open-field tests) but female rats presented significant 'behavioral despair' (forced swim test) paralleled by anhedonia (sucrose preference). In contrast, male rats showed no behavioral despair but did present anhedonia. This different behavioral picture was supported by biochemical parameters of depression, namely CREB alteration. Only female rats had low CREB activity in the hippocampal formation and prefrontal cortex and high activity in the NAc paralleled by increases in dynorphin expression. These results suggest that heavy cannabis consumption in adolescence may induce subtle alterations in the emotional circuit in female rats, ending in depressive-like behavior, whereas male rats show altered sensitivity to rewarding stimuli.

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Crossref · 10.1038/sj.npp.1301664

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Authors
Rubino, T., Vigano', D., Realini, N., Guidali, C., Braida, D., Capurro, V., Castiglioni, C., Cherubino, F., Romualdi, P., Candeletti, S., Sala, M., & Parolaro, D.
Affiliations
  • University of Insubria (IT)
  • University of Milan (IT)
  • University of Bologna (IT)
Corresponding author
Parolaro, Daniela
Venue
Neuropsychopharmacology
Published
2008-01-02
Volume
33
Issue
11
Pages
2760-2771
ISSN
  • 0893-133X (ISSN-L)
  • 1740-634X
OpenAlex
W2005270780
Cited by
345
References
48
Citations by year
2026: 10 · 2025: 18 · 2024: 9 · 2023: 15 · 2022: 22 · 2021: 32 · 2020: 29 · 2019: 20 · 2018: 22 · 2017: 18 · 2016: 19 · 2015: 30 · 2014: 14 · 2013: 21 · 2012: 20
FWCI
10.53
Type
journal article
Language
en
Open access
closed
Locations
  • Neuropsychopharmacology (publishedVersion)
  • PubMed (publishedVersion)
  • Archivio istituzionale della ricerca (Alma Mater Studiorum Università di Bologna) (submittedVersion)
  • IrInSubria (University of Insubria) (submittedVersion)
Funders
Università degli Studi dell'Insubria
Topics
  • Health Sciences › Medicine › Pharmacology › Cannabis and Cannabinoid Research
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neurotransmitter Receptor Influence on Behavior
  • Life Sciences › Neuroscience › Behavioral Neuroscience › Stress Responses and Cortisol
Keywords
adolescent cannabis exposure, delta-9-tetrahydrocannabinol, endocannabinoid system, sex differences, CB1 receptor, amygdala, ventral tegmental area, nucleus accumbens, hippocampus, anhedonia, behavioral despair, depression-like behavior, CREB, dynorphin, reward sensitivity, anxiety
MeSH terms
Age Factors, Animals, Conditioning, Operant, Drug Administration Schedule, Emotions, Female, Male, Motor Activity, Sex Characteristics, Dronabinol, Rats, Sprague-Dawley, Maze Learning, Rats

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