PreprintCited by 196Nicotinic Acetylcholine Receptors StudyNeuroscience and Neuropharmacology ResearchSmoking Behavior and Cessation

Nicotinic cholinergic synaptic mechanisms in the ventral tegmental area contribute to nicotine addiction

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Pidoplichko, Volodymyr I., Noguchi, Jun, Areola, Oluwasanmi O., Liang, Yong, Peterson, Jayms, Zhang, Tianxiang, Dani, John A.·2004·Learning & Memory

Abstract

Tobacco use is a major health problem that is estimated to cause 4 million deaths a year worldwide. Nicotine is the main addictive component of tobacco. It acts as an agonist to activate and desensitize nicotinic acetylcholine receptors (nAChRs). A component of nicotine's addictive power is attributable to actions on the mesolimbic dopaminergic system, which serves a fundamental role in the acquisition of behaviors that are inappropriately reinforced by addictive drugs. Here we show that nicotine, in the same concentration and time ranges as obtained from tobacco, has three main actions that regulate the activity of midbrain dopamine (DA) neurons. Nicotine first activates and then desensitizes nAChRs on the DA neurons. This process directly excites the DA neurons for a short period of time before the nAChRs desensitize. Nicotine also enhances glutamatergic excitation and decreases GABAergic inhibition onto DA neurons. These events increase the probability for synaptic plasticity, such as long-term potentiation. The short-lived direct excitation of the DA neurons coupled with the enhanced glutamatergic afferent activity provides the presynaptic and postsynaptic coincidence necessary to initiate synaptic potentiation. In total, these synaptic events lead to a relatively long-lasting heightened activity of midbrain DA neurons. Consistent with other summarized studies, this work indicates that the synaptic changes normally associated with learning and memory can be influenced and commandeered during the nicotine addiction process.

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Research works printed but not linked: 1

  1. Karan, L.D., Dani, J.A., and Benowitz, N.L. 2003. The pharmacology of nicotine dependence. In Principles of addiction medicine, 3rd ed. (eds. A. Graham et al.), pp. 225-248. American Society of Addiction Medicine, Inc.

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Authors
Pidoplichko, V. I., Noguchi, J., Areola, O. O., Liang, Y., Peterson, J., Zhang, T., & Dani, J. A.
Affiliations
Baylor College of Medicine (US)
Venue
Learning & Memory
Published
2004-01
Volume
11
Issue
1
Pages
60-69
ISSN
  • 1072-0502 (ISSN-L)
  • 1549-5485
OpenAlex
W2047098919
Cited by
196
References
96
Citations by year
2026: 2 · 2025: 2 · 2024: 2 · 2023: 2 · 2022: 4 · 2021: 5 · 2020: 3 · 2019: 5 · 2018: 7 · 2017: 3 · 2016: 6 · 2015: 8 · 2014: 8 · 2013: 11 · 2012: 11
Type
posted content
Language
en
Open access
Locations
  • Learning & Memory (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institute on Drug Abuse (DA-12661, DA09411, R01DA009411, P01DA012661)
  • National Institute of Neurological Disorders and Stroke (NS 21229, R37NS021229, R01NS021229)
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
  • Health Sciences › Medicine › Physiology › Smoking Behavior and Cessation
Keywords
nicotine dependence, nicotinic acetylcholine receptors, ventral tegmental area, midbrain dopaminergic neurons, mesolimbic dopamine system, receptor desensitization, glutamatergic excitation, GABAergic inhibition, synaptic plasticity, long-term potentiation, coincidence detection, tobacco use
MeSH terms
Acetylcholine, Afferent Pathways, Animals, Cholinergic Fibers, Dopamine, Electrophysiology, Extracellular Space, gamma-Aminobutyric Acid, Immunohistochemistry, Synaptic Transmission, Neuronal Plasticity, Nicotine, Nucleus Accumbens, Receptors, Nicotinic, Time Factors, Rats, Sprague-Dawley, Microdialysis, Ventral Tegmental Area, Glutamic Acid, Substance-Related Disorders, Rats

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