Cited by 151Neurotransmitter Receptor Influence on BehaviorNicotinic Acetylcholine Receptors StudySmoking Behavior and Cessation

Primary reinforcing effects of nicotine are triggered from multiple regions both inside and outside the ventral tegmental area

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Ikemoto, Satoshi, Qin, Mei, Liu, Zhong-Hua·2006·The Journal of Neuroscience

Abstract

Nicotine is thought to be the key substance responsible for tobacco-smoking habits and appears to trigger reinforcement via the ventral tegmental area (VTA). Recently, multiple anatomical substrates for drug reinforcement have been identified in the vicinity of the ventral midbrain. In addition to the posterior portion of the VTA, the central linear nucleus raphé and the supramammillary nucleus of the posterior hypothalamus mediate drug reinforcement. Using intracranial self-administration procedures, we examined whether these regions mediate the reinforcing effects of nicotine. Rats learned to lever press for self-administration of nicotine into the posterior VTA, central linear nucleus, and supramammillary nucleus, suggesting a reinforcing action of nicotine in these regions. The rats did not self-administer nicotine into surrounding regions including the anterior VTA, substantia nigra, the region just dorsal to the posterior VTA, interpeduncular nucleus, or medial mammillary nucleus. The reinforcing effects of nicotine into the three brain regions were further confirmed by a two-lever discrimination procedure, in which rats learned to selectively respond between active and inactive levers. The reinforcing effects of nicotine administration into the posterior VTA, central linear nucleus, and supramammillary nucleus were blocked by coadministration of the nicotine receptor antagonist mecamylamine. The reinforcing effects of nicotine into the posterior VTA or central linear nucleus were attenuated by coadministration of the D2 receptor agonist quinpirole. These findings demonstrate that nicotine reinforcement involves multiple regions both inside and outside the VTA.

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Crossref · 10.1523/jneurosci.4542-05.2006

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Authors
Ikemoto, S., Qin, M., & Liu, Z.-H.
Affiliations
National Institutes of Health (US)
Venue
The Journal of Neuroscience
Published
2006-01-18
Volume
26
Issue
3
Pages
723-730
ISSN
  • 0270-6474 (ISSN-L)
  • 1529-2401
OpenAlex
W2081997259
Cited by
151
References
40
Citations by year
2026: 2 · 2025: 1 · 2024: 4 · 2023: 5 · 2022: 6 · 2021: 5 · 2020: 6 · 2019: 1 · 2018: 8 · 2017: 5 · 2016: 3 · 2015: 9 · 2014: 12 · 2013: 12 · 2012: 9
FWCI
4.68
Type
journal article
Language
en
Open access
Locations
  • Journal of Neuroscience (publishedVersion, cc-by-nc-sa)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health
  • National Institute on Drug Abuse (Z01DA000439)
Topics
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neurotransmitter Receptor Influence on Behavior
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Nicotinic Acetylcholine Receptors Study
  • Health Sciences › Medicine › Physiology › Smoking Behavior and Cessation
Keywords
nicotine, drug reinforcement, ventral tegmental area, supramammillary nucleus, posterior hypothalamus, mecamylamine, nicotinic acetylcholine receptors, dopamine D2 receptor, quinpirole, smoking
MeSH terms
Animals, Discrimination Learning, Dopamine, Male, Nicotine, Reinforcement, Psychology, Self Administration, Rats, Wistar, Ventral Tegmental Area, Dopamine Antagonists, Rats

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