Cited by 188Neurotransmitter Receptor Influence on BehaviorSubstance Abuse Treatment and OutcomesNeural and Behavioral Psychology Studies

Impulsivity predicts the escalation of cocaine self-administration in rats

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Anker, Justin J., Perry, Jennifer L., Gliddon, Luke A., Carroll, Marilyn E.·2009·Pharmacology Biochemistry and Behavior

Abstract

Impulsivity, as measured by the delay-discounting task, predicts the acquisition of cocaine self-administration and reinstatement of cocaine seeking in rats. The purpose of this study was to extend these results to the escalation phase of drug self-administration. Female rats were initially screened for high (HiI) or low (LoI) impulsivity for food reinforcement using a delay-discounting procedure. They were then implanted with i.v. catheters and trained to lever press for cocaine infusions (0.8 mg/kg). Once cocaine intake stabilized, rats were allowed to self-administer cocaine (0.4 mg/kg) under a fixed-ratio 1 (FR 1) schedule during three, 2 h short-access sessions. Subsequently, performance was briefly assessed under a progressive ratio (PR) schedule for 3 doses of cocaine (0.2, 0.8, and 3.2 mg/kg). Following PR testing, the cocaine dose was then changed to 0.4 mg/kg. Session length was then extended to 6 h for 21 days (extended access), and 0.4 mg/kg cocaine was available under a FR 1 schedule. After the 21-day extended access phase, responses and infusions under the short access FR and PR dose-response conditions were reassessed. The results indicated that HiI rats escalated cocaine-reinforced responding during the extended access condition, but LoI rats did not. HiI rats also earned significantly more infusions than LoI rats under the post-escalation short access FR condition. However, HiI and LoI rats did not differ under the pre- and post-extended access PR conditions. This study suggests that individual differences in impulsivity predict escalation of cocaine self-administration in female rats, which may have implications in the prediction of binge-like patterns of cocaine intake in women.

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Authors
Anker, J. J., Perry, J. L., Gliddon, L. A., & Carroll, M. E.
Affiliations
University of Minnesota (US)
Corresponding author
Anker, Justin J.
Venue
Pharmacology Biochemistry and Behavior
Publisher
Elsevier BV
Published
2009-09
Volume
93
Issue
3
Pages
343-348
ISSN
0091-3057 (ISSN-L)
OpenAlex
W2083570864
Cited by
188
References
62
Citations by year
2026: 3 · 2025: 4 · 2024: 1 · 2023: 5 · 2022: 7 · 2021: 11 · 2020: 8 · 2019: 11 · 2018: 12 · 2017: 7 · 2016: 10 · 2015: 13 · 2014: 19 · 2013: 21 · 2012: 21
FWCI
7.74
Type
journal article
Language
en
Open access
Locations
  • Pharmacology Biochemistry and Behavior (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • U.S. Public Health Service (K05 015267-07)
  • National Institute on Drug Abuse (R01DA003240, K05DA015267, F31DA023301)
Topics
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neurotransmitter Receptor Influence on Behavior
  • Health Sciences › Medicine › Epidemiology › Substance Abuse Treatment and Outcomes
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Neural and Behavioral Psychology Studies
Keywords
impulsivity, cocaine self-administration, delay discounting, individual differences, female rats, progressive ratio schedule, extended access
MeSH terms
Animals, Conditioning, Operant, Data Interpretation, Statistical, Female, Impulsive Behavior, Prognosis, Reinforcement Schedule, Self Administration, Rats, Wistar, Disease Progression, Cocaine-Related Disorders, Rats

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