Cited by 33Nicotinic Acetylcholine Receptors StudyNeurotransmitter Receptor Influence on BehaviorSmoking Behavior and Cessation

Contribution of dihydro-beta-erythroidine sensitive nicotinic acetylcholine receptors in the ventral tegmental area to cocaine-induced behavioral sensitization in rats

Champtiaux, N., Kalivas, P.W., Bardo, M.T.·2006·Behavioural Brain Research

Abstract

Nicotinic acetylcholine receptors (nAChRs) are known to play a role in several aspects of cocaine addiction. Recently, systemic administration of the nicotinic receptor antagonist mecamylamine was shown to block the induction of long-term locomotor sensitization to cocaine. Behavioral sensitization being a model of long-term neuroadaptations to chronic cocaine exposure, the goal of the current study was to identify the anatomical localization, as well as the nature, of the nicotinic receptors involved. Male Sprague-Dawley rats were stereotaxically implanted with bilateral cannula into either the ventral tegmental area (VTA) or the nucleus accumbens (Nacc). On each of the six consecutive days, rats were microinjected bilaterally with the selective nicotinic antagonists dihydro-beta-erythroidine (DHbetaE), methyllycaconitine (MLA) or saline, followed by an intra-peritoneal injection of cocaine (15 mg/kg, i.p.) or saline. Following a 2-week withdrawal period, rats received a final injection of cocaine in the absence of nicotinic antagonist to test for sensitization. When microinjected into the VTA, DHbetaE, but not MLA, prevented the induction of behavioral sensitization to cocaine. In contrast, behavioral sensitization was present in rats receiving DHbetaE microinjections into the Nacc. Neither antagonist, whether injected into the VTA or the Nacc had any significant effect on the acute locomotor response to cocaine. Given the subtype selectivity of the nicotinic antagonists employed, heteromeric beta2-containing (beta2*) nAChRs, but not homomeric alpha7* nAChRs, in the VTA may be involved in the neuroadaptive changes underlying cocaine sensitization.

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Crossref · 10.1016/j.bbr.2005.10.017

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  • Disruption of PPTg activity decreases the rewarding and locomotor effects of drugs of abuse such as cocaine and nicotine.

    “At the behavioral level, this conclusion is consistent with the finding that disruption of PPTg activity decreases the rewarding and locomotor effects of drugs of abuse such as cocaine and nicotine (Champtiaux et al., 2006; Corrigall et al., 1994; Corrigall et al., 2002), while lesion of NAc cholinergic neurons increases cocaine self-administration, as might be expected if a pause in cholinergic”

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Authors
Champtiaux, N., Kalivas, P. W., & Bardo, M. T.
Affiliations
  • Medical University of South Carolina (US)
  • University of Kentucky (US)
Corresponding author
Bardo, M.T.
Venue
Behavioural Brain Research
Publisher
Elsevier BV
Published
2006-03
Volume
168
Issue
1
Pages
120-126
ISSN
0166-4328 (ISSN-L)
OpenAlex
W2136149147
Cited by
33
References
53
Citations by year
2026: 1 · 2025: 1 · 2024: 1 · 2021: 1 · 2019: 4 · 2018: 1 · 2017: 1 · 2016: 1 · 2015: 4 · 2014: 4 · 2012: 3
FWCI
0.88
Type
journal article
Language
en
Open access
closed
Locations
  • Behavioural Brain Research (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Philip Morris International
  • National Institutes of Health
  • National Institute on Drug Abuse (U19DA017548, DA05312, DA 17548)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Nicotinic Acetylcholine Receptors Study
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neurotransmitter Receptor Influence on Behavior
  • Health Sciences › Medicine › Physiology › Smoking Behavior and Cessation
Keywords
nicotinic acetylcholine receptors, dihydro-beta-erythroidine, cocaine, behavioral sensitization, ventral tegmental area, nucleus accumbens, mecamylamine, methyllycaconitine, locomotor sensitization, alpha7 nAChR, cocaine dependence, neural adaptation
MeSH terms
Aconitine, Animals, Behavior, Animal, Cocaine, Dihydro-beta-Erythroidine, Male, Microinjections, Receptors, Nicotinic, Stereotaxic Techniques, Stereotyped Behavior, Rats, Sprague-Dawley, Ventral Tegmental Area, Nicotinic Antagonists, Rats, alpha7 Nicotinic Acetylcholine Receptor

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