The DOI matches its Crossref record; 57 of the 57 references it cites were found in a registry or an index.
Acquisition and maintenance of cocaine self-administration in adolescent rats: effects of sex and gonadal hormones
Abstract
Rationale Previous work has shown that adult female rats are more sensitive than adult male rats to the reinforcing effects of cocaine, an effect that appears to be due, at least in part, to ovarian hormones.Objective In this study, we examine sex differences in cocaine self-administration during adolescence, a period of marked hormonal change.Materials and methods Adolescent male and female Sprague-Dawley rats were trained to self-administer cocaine (0.75 mg/kg per infusion) under a fixed ratio 1 schedule (i.e., each response was reinforced by an infusion of cocaine) beginning on postnatal day 30. After acquisition, responding was assessed under a progressive-ratio schedule until postnatal day 50 with blood sampling occurring before the first five sessions to determine the relationship between gonadal hormones (i.e., estradiol, progesterone, and testosterone) and motivation for cocaine. Estrous cycle phase was monitored throughout the study. Separate groups of adolescent male and female rats were compared on the acquisition of and progressive-ratio responding for sucrose reinforcement.Results Females acquired cocaine self-administration more readily than did males, and a greater percentage of females acquired self-administration. Under progressive-ratio testing conditions, adolescent females responded at higher levels than adolescent males to obtain cocaine infusions, and in females, responding was positively associated with levels of estradiol and greatest during estrus. No sex differences were observed for sucrose reinforcement.Conclusion These findings suggest that sex differences are relevant during adolescence with evidence implicating circulating estradiol level as a factor that contributes to the enhanced sensitivity in females to the reinforcing effects of cocaine.
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“For example, p30–50 female rats show higher levels of cocaine self-administration than p30-p50 male rats, with higher levels of estradiol correlating with higher levels of cocaine self-administration in females (Lynch, 2008).”
From Does puberty mark a transition in sensitive periods for plasticity in the associative neocortex? (2017) · cites this paper as Lynch, 2008
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Pubertal hormones organize the adolescent brain and behavior
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Gender Differences in Dopaminergic Function in Striatum and Nucleus Accumbens
Becker, J. B. (1999) · Pharmacology Biochemistry and Behavior · doi:10.1016/s0091-3057(99)00168-9 · Cited by 696
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Biological basis of sex differences in drug abuse: preclinical and clinical studies
Lynch, W. J., Roth, M. E., & Carroll, M. E. (2002) · Psychopharmacology · doi:10.1007/s00213-002-1183-2 · Cited by 610
Sex differences in the acquisition of intravenously self-administered cocaine and heroin in rats
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Self-citationMethamphetamine use behaviors and gender differences
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A Comparison of Male and Female Cocaine Abusers
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Becker, J. B., McClellan, M. L., & Reed, B. G. (2016) · Journal of Neuroscience Research · doi:10.1002/jnr.23963 · Cited by 570
Anker, J. J., & Carroll, M. E. (2010) · Current topics in behavioral neurosciences · doi:10.1007/7854_2010_93 · Cited by 302
Cotto, J. H., Davis, E., Dowling, G. J., Elcano, J. C., Staton, A. B., & Weiss, S. R. B. (2010) · Gender Medicine · doi:10.1016/j.genm.2010.09.004 · Cited by 247
Sex differences and ovarian hormones in animal models of drug dependence
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Role of progesterone in nicotine addiction: Evidence from initiation to relapse.
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Metadata
- Authors
- Lynch, W. J.
- Affiliations
- University of Virginia Health System (US)
- Corresponding author
- Lynch, Wendy J.
- ORCID
- Lynch, Wendy J.
- Venue
- Psychopharmacology
- Published
- 2007-12-08
- Volume
- 197
- Issue
- 2
- Pages
- 237-246
- ISSN
- 0033-3158 (ISSN-L)
- 1432-2072
- OpenAlex
- W2006205817
- Cited by
- 152
- References
- 57
- Citations by year
- 2026: 6 · 2025: 9 · 2024: 6 · 2023: 6 · 2022: 8 · 2021: 10 · 2020: 9 · 2019: 6 · 2018: 5 · 2017: 8 · 2016: 7 · 2015: 8 · 2014: 11 · 2013: 15 · 2012: 8
- FWCI
- 3.18
- Type
- journal article
- Language
- en
- Open access
- closed
- Licence
- www.springer.com/tdm (tdm)
- Locations
- Psychopharmacology (publishedVersion)
- PubMed (publishedVersion)
- Funders
- Università degli Studi di Firenze
- National Institute on Drug Abuse (R03DA018978)
- Topics
- Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neurotransmitter Receptor Influence on Behavior
- Life Sciences › Neuroscience › Cognitive Neuroscience › Neural and Behavioral Psychology Studies
- Health Sciences › Medicine › Pediatrics, Perinatology and Child Health › Prenatal Substance Exposure Effects
- Keywords
- cocaine self-administration, adolescent rats, sex differences, gonadal hormones, estradiol, progesterone, testosterone, estrous cycle, sucrose reinforcement, fixed-ratio schedules, progressive ratio schedule, ovarian hormones
- MeSH terms
- Aging, Animals, Cocaine, Conditioning, Operant, Data Interpretation, Statistical, Estradiol, Female, Male, Progesterone, Reinforcement Schedule, Self Administration, Sex Characteristics, Gonadal Steroid Hormones, Testosterone, Rats, Sprague-Dawley, Cocaine-Related Disorders, Estrous Cycle, Rats
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