Cited by 344Neurotransmitter Receptor Influence on BehaviorSubstance Abuse Treatment and OutcomesNicotinic Acetylcholine Receptors Study

Preexposure to amphetamine and nicotine predisposes rats to self-administer a low dose of cocaine

Horger, Brian A., Giles, Melissa K., Schenk, Susan·1992·Psychopharmacology

Abstract

The acquisition of low-dose (0.25 mg/kg/infusion) intravenous cocaine self-administration was measured in rats that had received nine daily injections of amphetamine (1.0 mg/kg, IP), nicotine (0.6 mg/kg base weight, SC) or vehicle. For control rats, the acquisition of self-administration was gradual with the number of responses per 2 h daily test session increasing between days 3 and 9. By comparison, rats preexposed with amphetamine and nicotine demonstrated elevated response means during the early days of testing, suggesting more rapid acquisition. All groups eventually reached similar asymptotic levels of responding. The enhanced responding observed during the early days of testing in the rats preexposed with amphetamine and nicotine was due to an increased number of subjects that reliably self-administered cocaine. Thus, the rats preexposed with amphetamine and nicotine seemed predisposed to the reinforcing effects of cocaine. In contrast to the self-administration data, preexposure to nicotine failed to sensitize rats to the locomotor activating effects of cocaine. In fact, the same preexposure regimen appeared to produce tolerance to this effect of cocaine. These data give evidence that different mechanisms may mediate sensitization to the reinforcing and locomotor activating effects of cocaine.

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Crossref · 10.1007/bf02245147

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Authors
Horger, B. A., Giles, M. K., & Schenk, S.
Affiliations
Texas A&M University (US)
Venue
Psychopharmacology
Published
1992-06
Volume
107
Issue
2-3
Pages
271-276
ISSN
  • 0033-3158 (ISSN-L)
  • 1432-2072
OpenAlex
W2038733942
Cited by
344
References
30
Citations by year
2026: 1 · 2025: 1 · 2023: 4 · 2022: 2 · 2021: 6 · 2020: 53 · 2019: 10 · 2018: 5 · 2017: 10 · 2016: 8 · 2015: 5 · 2014: 7 · 2013: 16 · 2012: 6
FWCI
2.17
Type
journal article
Language
en
Open access
closed
Locations
  • Psychopharmacology (publishedVersion)
  • PubMed (publishedVersion)
Funders
National Institute on Drug Abuse (DA05548)
Topics
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neurotransmitter Receptor Influence on Behavior
  • Health Sciences › Medicine › Epidemiology › Substance Abuse Treatment and Outcomes
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Nicotinic Acetylcholine Receptors Study
Keywords
cocaine self-administration, amphetamine, nicotine, cocaine sensitization, locomotor sensitization, cocaine tolerance, cocaine reinforcement
MeSH terms
Amphetamine, Animals, Cocaine, Conditioning, Operant, Male, Motor Activity, Nicotine, Rats, Inbred Strains, Self Administration, Rats

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