Cited by 701Nicotinic Acetylcholine Receptors StudyNeuroscience and Neuropharmacology ResearchNeurotransmitter Receptor Influence on Behavior

Synaptic mechanisms underlie nicotine-induced excitability of brain reward areas

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Mansvelder, Huibert D, Keath, J.Russel, McGehee, Daniel S·2002·Neuron

Abstract

A single nicotine exposure increases dopamine levels in the mesolimbic reward system for hours, but nicotine concentrations experienced by smokers desensitize nAChRs on dopamine neurons in seconds to minutes. Here, we show that persistent modulation of both GABAergic and glutamatergic synaptic transmission by nicotine can contribute to the sustained increase in dopamine neuron excitability. Nicotine enhances GABAergic transmission transiently, which is followed by a persistent depression of these inhibitory inputs due to nAChR desensitization. Simultaneously, nicotine enhances glutamatergic transmission through nAChRs that desensitize less than those on GABA neurons. The net effect is a shift toward excitation of the dopamine reward system. These results suggest that spatial and temporal differences in nicotinic receptor activity on both excitatory and inhibitory neurons in reward areas coordinate to reinforce nicotine self-administration.

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Crossref · 10.1016/s0896-6273(02)00625-6

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  • Nicotine can desensitize β2* nAChRs on GABAergic inputs to DA neurons, shifting from mixed excitation and inhibition to more unmixed stimulation of nAChRs on presynaptic glutamatergic terminals.

    “In addition, nicotine can desensitize β2 Ã nAChRs on GABAergic inputs to DA neurons, resulting in a shift from mixed excitation and inhibition of DA neurons by nicotine, to a more unmixed stimulation of nAChRs on presynaptic glutamatergic terminals (Mansvelder et al. 2002;Wooltorton et al. 2003).”

    From Mechanisms of Nicotine Addiction (2021) · cites this paper as Mansvelder et al. 2002

  • At lower nicotine concentrations (250 nM), β2* nAChRs also desensitize rapidly.

    “However, at lower nicotine concentrations, which may be more similar to those observed at steady state in a smoker's brain (250 nM), β2* nAChRs also desensitize rapidly (Mansvelder et al., 2002; Mansvelder and McGehee, 2000).”
  • Chronic nicotine exposure would greatly increase response to environmental stimuli that increase DA neuron burst firing, and greatly decrease DA responses under conditions when these neurons were firing tonically.

    “Since sustained nicotine exposure shifts the balance toward glutamate-mediated excitation of DA neurons (Mansvelder et al., 2002; Wooltorton et al., 2003) the combination of increased drive on the cell bodies in the VTA and increased filtering in the striatum/nucleus accumbens suggests that chronic nicotine exposure would greatly increase response to environmental stimuli that increase DA neuron”
  • Presynaptic effects of lower concentrations of nicotine blocked by α7* selective agents persist in the continued presence of nicotine in rat and mouse brain slices, whereas presynaptic effects blocked by β2* selective agents desensitize during continued nicotine application.

    “More recent studies have shown that presynaptic effects of lower concentrations of nicotine that are blocked by nicotinic agents that are thought to be selective for α7* nAChRs persist in the continued presence of nicotine in rat (Mansvelder et al., 2002) and mouse (Wooltorton et al., 2003) brain slices, whereas presynaptic effects that are blocked with agents thought to be selective for β2* nAChR”
  • Low level nicotine concentrations experienced by smokers over long periods preferentially desensitize α4β2 nAChRs on GABAergic terminals and not α7 nAChRs on glutamatergic terminals in the VTA, shifting presynaptic effects of nicotine from mixed inhibition and excitation of DA neurons toward the glutamatergic response.

    “The low level nicotine concentrations experienced by smokers over long periods are suggested to preferentially desensitize α4β2 nAChRs on GABAergic terminals and not α7 nAChRs on glutamatergic terminals in the VTA, thus shifting the presynaptic effects of nicotine from a mixed inhibition and excitation of DA neurons, toward the glutamatergic response to nicotine (Mansvelder et al., 2002; Mansvel”

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Authors
Mansvelder, H. D., Keath, J. R., & McGehee, D. S.
Affiliations
University of Chicago (US)
Corresponding author
McGehee, Daniel S
Venue
Neuron
Publisher
Elsevier BV
Published
2002-03
Volume
33
Issue
6
Pages
905-919
ISSN
0896-6273 (ISSN-L)
OpenAlex
W2157815289
Cited by
701
References
71
Citations by year
2026: 11 · 2025: 11 · 2024: 10 · 2023: 10 · 2022: 18 · 2021: 16 · 2020: 25 · 2019: 17 · 2018: 30 · 2017: 20 · 2016: 22 · 2015: 39 · 2014: 28 · 2013: 30 · 2012: 41
FWCI
12.66
Type
journal article
Language
en
Open access
Locations
  • Neuron (publishedVersion)
  • PubMed (publishedVersion)
  • VU Research Portal (publishedVersion, other-oa)
  • Digital Academic REpository of VU University Amsterdam (Vrije Universiteit Amsterdam) (submittedVersion)
  • Data Archiving and Networked Services (DANS) (submittedVersion, other-oa)
Funders
  • Nederlandse Organisatie voor Wetenschappelijk Onderzoek
  • National Institute on Drug Abuse (DA07255, T32DA007255)
  • National Institute of Neurological Disorders and Stroke (R01NS035090, NS-35090)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Nicotinic Acetylcholine Receptors Study
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neurotransmitter Receptor Influence on Behavior
Keywords
nicotine, nicotinic acetylcholine receptors, receptor desensitization, dopaminergic neurons, mesolimbic reward system, GABAergic neurotransmission, glutamatergic neurotransmission, neuronal excitability, synaptic depression, nicotine self-administration
MeSH terms
Acetylcholinesterase, Action Potentials, Adolescent, Animals, Atropine, Cholinesterase Inhibitors, Dopamine, Electrophysiology, gamma-Aminobutyric Acid, Ganglionic Stimulants, Humans, Insecticides, Synaptic Transmission, Neurons, Nicotine, Organothiophosphorus Compounds, Quinoxalines, Receptors, Nicotinic, Reward, Smoking, Rats, Sprague-Dawley, Ventral Tegmental Area, Patch-Clamp Techniques, Cholinergic Antagonists, Excitatory Amino Acid Antagonists, Glutamic Acid, Muscarinic Antagonists, Mice, Rats, In Vitro Techniques

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