Cited by 12Smoking Behavior and CessationNeurotransmitter Receptor Influence on BehaviorNicotinic Acetylcholine Receptors Study

Exposure to nicotine enhances its subsequent self-administration: Contribution of nicotine-associated contextual stimuli

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Neugebauer, Nichole M., Cortright, James J., Sampedro, Georgia R., Vezina, Paul·2014·Behavioural Brain Research

Abstract

Contextual stimuli present during nicotine exposure can come to act as conditioned stimuli and have been shown to play an important role in ongoing nicotine self-administration. In the present study, we characterized the effects of contextual stimuli previously paired with non-contingent nicotine exposure injections on subsequent nicotine self-administration. Rats were exposed to five injections of either saline or nicotine (0.4 mg/kg, i.p.) in either their home cage or a self-administration chamber with the levers retracted. Two weeks later, they were allowed to self-administer nicotine (30 μg/kg/infusion, IV) under fixed ratio (FR) schedules of reinforcement across 12 consecutive sessions. Lastly, responding under a progressive ratio (PR) schedule was assessed. Rats exposed to nicotine in the self-administration chamber subsequently increased their intake of nicotine across the FR test days, obtaining more infusions on average by days 7-12 compared to their saline exposed controls. This increase was not due to nicotine exposure alone as rats exposed to nicotine in the home cage did not show this effect. It was also not due to differences in the final ratio achieved between nicotine and saline exposed rats. Although rats exposed to nicotine in the self-administration chambers displayed reduced discrimination between the active and inactive levers during FR testing, they showed increased motivation to self-administer nicotine under the PR schedule. These results indicate that exposure to nicotine can enhance its subsequent self-administration and highlight the contribution of nicotine-associated contextual stimuli to the work output rats ultimately emit to obtain the drug.

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Authors
Neugebauer, N. M., Cortright, J. J., Sampedro, G. R., & Vezina, P.
Affiliations
University of Chicago (US)
Venue
Behavioural Brain Research
Publisher
Elsevier BV
Published
2014-03
Volume
260
Pages
155-161
ISSN
0166-4328 (ISSN-L)
OpenAlex
W2153794168
Cited by
12
References
48
Citations by year
2021: 1 · 2020: 1 · 2018: 2 · 2017: 2 · 2016: 1 · 2015: 3 · 2014: 2
FWCI
1.38
Type
journal article
Language
en
Open access
Locations
  • Behavioural Brain Research (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
Funders
National Institute on Drug Abuse (R01DA009397, P01DA019695, T32DA007255)
Topics
  • Health Sciences › Medicine › Physiology › Smoking Behavior and Cessation
  • 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
Keywords
nicotine, nicotine self-administration, contextual cues, conditioned stimulus, fixed-ratio schedules, progressive ratio schedule, drug motivation, work output, rats
MeSH terms
Animals, Conditioning, Operant, Cues, Discrimination, Psychological, Housing, Animal, Male, Motivation, Nicotine, Reinforcement Schedule, Reward, Self Administration, Space Perception, Time Factors, Nicotinic Agonists, Rats, Long-Evans, Rats, Drug-Seeking Behavior

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