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Impulsivity predicts the escalation of cocaine self-administration in rats
Open accessAbstract
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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“some evidence suggests impulsive choice is predictive of higher cocaine or methylphenidate intake”
From Changing Delay Discounting and Impulsive Choice: Implications for Addictions, Prevention, and Human Health (2019) · cites this paper as Anker et al., 2009
In the citing paper
“prospective studies suggest that high discounting rates may indicate vulnerability for the development of such problems across species”
From DAT1 and COMT effects on delay discounting and trait impulsivity in male adolescents with attention deficit/hyperactivity disorder and healthy controls (2010) · cites this paper as Anker et al, 2009
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Metadata
- Authors
- Anker, J. J., Perry, J. L., Gliddon, L. A., & Carroll, M. E.
- Affiliations
- University of Minnesota (US)
- Corresponding author
- Anker, Justin J.
- ORCID
- 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)
- PMC
- PMC2734915
- 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
- green
- www.ncbi.nlm.nih.gov
- 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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