Cited by 38Cannabis and Cannabinoid ResearchNeurotransmitter Receptor Influence on BehaviorNeuroscience and Neuropharmacology Research

Cannabinoid exposure in pubertal rats increases spontaneous ethanol consumption and NMDA receptor associated protein levels

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Klugmann, Matthias, Klippenstein, Viktoria, Leweke, F. Markus, Spanagel, Rainer, Schneider, Miriam·2011·The International Journal of Neuropsychopharmacology

Abstract

Recent evidence suggests an involvement of the endocannabinoid system in the regulation of emotional behaviour and ethanol intake. Here we investigated age-specific acute behavioural effects of the cannabinoid receptor agonist WIN 55,212-2 (WIN) on anxiety-related behaviour and voluntary ethanol consumption in rats. Animals were treated with WIN (1.2 mg/kg)/vehicle at puberty onset on postnatal day (PD) 40, or at adulthood (PD 100). Animals were tested in the elevated plus-maze (EPM) and the light/dark emergence test (EMT) and for the initial response to alcohol in a free-choice ethanol consumption paradigm. Acute WIN treatment increased anxiety-related behaviours, and this effect was found to be partially more pronounced in pubertal than adult rats. Additionally, increased intake of higher ethanol solutions after cannabinoid treatment was only observed in pubertal rats. These drug-induced behavioural changes during puberty are paralleled by induction of the NR1 subunit of the NMDA receptor in the medial prefrontal cortex and the striatum. Moreover, pubertal but not adult WIN administration increased the levels of the scaffold protein Homer in these brain regions. Enhanced CB₁ receptor levels in the reinforcement system were also observed in pubertal compared to adult rats. These data support the notion that puberty is a highly vulnerable period for the aversive effects of cannabinoid exposure. In particular, augmented ethanol intake in pubertal cannabinoid-exposed animals might be related to some extent to increased emotional behaviour and in particular to enhanced NMDA and CB₁ receptor signalling.

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Authors
Klugmann, M., Klippenstein, V., Leweke, F. M., Spanagel, R., & Schneider, M.
Affiliations
  • Johannes Gutenberg University Mainz (DE)
  • Heidelberg University (DE)
Corresponding author
Schneider, Miriam
Venue
The International Journal of Neuropsychopharmacology
Published
2011-01-07
Volume
14
Issue
04
Pages
505-517
ISSN
  • 1461-1457 (ISSN-L)
  • 1469-5111
OpenAlex
W2131100924
Cited by
38
References
76
Citations by year
2025: 2 · 2024: 2 · 2023: 1 · 2022: 1 · 2020: 2 · 2019: 1 · 2018: 3 · 2017: 2 · 2016: 5 · 2015: 3 · 2014: 4 · 2013: 5 · 2012: 5
FWCI
3.75
Type
journal article
Language
en
Open access
Locations
  • The International Journal of Neuropsychopharmacology (publishedVersion)
  • PubMed (publishedVersion)
Funders
Deutsche Forschungsgemeinschaft
Topics
  • Health Sciences › Medicine › Pharmacology › Cannabis and Cannabinoid Research
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neurotransmitter Receptor Influence on Behavior
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
Keywords
puberty, WIN 55,212-2, CB1 receptor, ethanol consumption, anxiety-like behavior, NMDA receptor, NR1 subunit, medial prefrontal cortex, striatum, alcohol reinforcement, endocannabinoid system, age-related susceptibility
MeSH terms
Homer Scaffolding Proteins, Age Factors, Alcohol Drinking, Ethanol, Animals, Behavior, Animal, Cannabinoids, Carrier Proteins, Emotions, Female, Male, Morpholines, Motor Activity, Naphthalenes, Sexual Maturation, Receptors, N-Methyl-D-Aspartate, Rats, Wistar, Receptor, Cannabinoid, CB1, Benzoxazines, Rats

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