Cited by 113Nicotinic Acetylcholine Receptors StudyNeurotransmitter Receptor Influence on BehaviorSmoking Behavior and Cessation

The motivational valence of nicotine in the rat ventral tegmental area is switched from rewarding to aversive following blockade of the α7-subunit-containing nicotinic acetylcholine receptor

Laviolette, Steven R., van der Kooy, Derek·2003·Psychopharmacology

Abstract

Rationale Within the mammalian ventral tegmental area (VTA), nicotine produces both aversive and rewarding motivational effects. However, the specific neuronal nicotinic acetylcholine receptor (nAChR) subtypes responsible for these effects are not clearly understood. Objectives In the present study, we challenged the motivational effects of nicotine directly in the VTA with nAChR subunit specific antagonists. Methods Using an unbiased place-conditioning procedure as a behavioural assay, we performed bilateral microinfusions of nicotine over a wide range of concentrations (0.008, 8, 24 and 48 nmol/0.5 microl) and challenged the aversive and reinforcing behavioural effects of these nicotine doses with co-administration of di-hydro-beta-erythroidine (DHbetaE) (5 or 50 nmol/0.5 microl), a nAChR antagonist with higher relative affinity for the alpha4beta2 nAChR subunit, methyllycaconitine citrate (MLA) (0.4 or 4 nmol/0.5 microl), a nAChR antagonist that displays greater relative affinity for the alpha7 nAChR, and the NMDA receptor antagonist, d-2-amino-7-phosphoheptanoic acid (AP-7; 18 nmol/0.5 microl). Results The alpha4beta2 antagonist DHbetaE blocked both the rewarding and aversive properties of intra-VTA nicotine. However, the alpha7 antagonist MLA blocked nicotine reward and switched the motivational valence of higher doses of nicotine (8-48 nmol/0.5 microl) from rewarding to aversive. The NMDA antagonist AP-7 blocked both the aversive and rewarding effects of intra-VTA nicot…

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Authors
Laviolette, S. R., & van der Kooy, D.
Affiliations
University of Toronto (CA)
Venue
Psychopharmacology
Published
2003-02-05
Volume
166
Issue
3
Pages
306-313
ISSN
0033-3158 (ISSN-L)
OpenAlex
W1540199296
Cited by
113
References
30
Citations by year
2026: 1 · 2025: 2 · 2024: 1 · 2023: 1 · 2022: 6 · 2021: 3 · 2020: 2 · 2018: 4 · 2017: 4 · 2016: 2 · 2015: 4 · 2014: 8 · 2013: 8 · 2012: 5
FWCI
2.29
Type
journal article
Language
en
Open access
closed
Locations
  • Psychopharmacology (publishedVersion)
  • PubMed (publishedVersion)
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
nicotine, ventral tegmental area, nicotinic acetylcholine receptors, alpha7 nAChR, alpha4beta2 nAChR, nicotine reward, nicotine aversion, dihydro-beta-erythroidine, methyllycaconitine, NMDA receptor, glutamatergic mechanisms, place conditioning, microinfusion
MeSH terms
Aconitine, Animals, Conditioning, Operant, Dihydro-beta-Erythroidine, Dose-Response Relationship, Drug, Male, Microinjections, Motivation, Nicotine, Receptors, Nicotinic, Reinforcement, Psychology, Reward, 2-Amino-5-phosphonovalerate, Receptors, N-Methyl-D-Aspartate, Rats, Wistar, Ventral Tegmental Area, Excitatory Amino Acid Antagonists, Nicotinic Agonists, Nicotinic Antagonists, Rats, alpha7 Nicotinic Acetylcholine Receptor

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