Cited by 50Neurotransmitter Receptor Influence on BehaviorSubstance Abuse Treatment and OutcomesNeuroscience and Neuropharmacology Research

Sex and Adolescent Ethanol Exposure Influence Pavlovian Conditioned Approach

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Madayag, Aric C., Stringfield, Sierra J., Reissner, Kathryn J., Boettiger, Charlotte A., Robinson, Donita L.·2017·Alcoholism: Clinical and Experimental Research

Abstract

Background: Alcohol use among adolescents is widespread and a growing concern due to long‐term behavioral deficits, including altered Pavlovian behavior, that potentially contribute to addiction vulnerability. We tested the hypothesis that adolescent intermittent ethanol ( AIE ) exposure alters Pavlovian behavior in males and females as measured by a shift from goal‐tracking to sign‐tracking. Additionally, we investigated GLT ‐1, an astrocytic glutamate transporter, as a potential contributor to a sign‐tracking phenotype. Methods: Male and female Sprague‐Dawley rats were exposed to AIE (5 g/kg, intragastric) or water intermittently 2 days on and 2 days off from postnatal day (P) 25 to 54. Around P70, animals began 20 daily sessions of Pavlovian conditioned approach (PCA), where they learned that a cue predicted noncontingent reward delivery. Lever pressing indicated interaction with the cue, or sign‐tracking, and receptacle entries indicated approach to the reward delivery location, or goal‐tracking. To test for effects of AIE on nucleus accumbens (NAcc) excitatory signaling, we isolated membrane subfractions and measured protein levels of the glutamate transporter GLT ‐1 after animals completed behavior as a measure of glutamate homeostasis. Results: Females exhibited elevated sign‐tracking compared to males with significantly more lever presses, faster latency to first lever press, and greater probability to lever press in a trial. AIE significantly increased lever pressing while blunting goal‐tracking, as indicated by fewer cue‐evoked receptacle entries, slower latency to receptacle entry, and lower probability to enter the receptacle in a trial. No significant sex‐by‐exposure interactions were observed in sign‐ or goal‐tracking metrics. Moreover, we found no significant effects of sex or exposure on membrane GLT ‐1 expression in the NAcc. Conclusions: Females exhibited enhanced sign‐tracking compared to males, while AIE decreased goal‐tracking compared to control exposure. Our findings support the hypothesis that adolescent binge ethanol can shift conditioned behavior from goal‐ to cue‐directed in PCA, especially in females.

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Authors
Madayag, A. C., Stringfield, S. J., Reissner, K. J., Boettiger, C. A., & Robinson, D. L.
Affiliations
University of North Carolina at Chapel Hill (US)
Corresponding author
Robinson, Donita L.
Venue
Alcoholism: Clinical and Experimental Research
Publisher
Wiley
Published
2017-03-13
Volume
41
Issue
4
Pages
846-856
ISSN
  • 0145-6008 (ISSN-L)
  • 1530-0277
OpenAlex
W2588840624
Cited by
50
References
56
Citations by year
2026: 3 · 2025: 3 · 2024: 7 · 2023: 8 · 2022: 4 · 2021: 6 · 2020: 5 · 2019: 7 · 2018: 4 · 2017: 3
FWCI
2.54
Type
journal article
Language
en
Open access
Locations
  • Alcoholism Clinical and Experimental Research (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
  • Carolina Digital Repository (University of North Carolina at Chapel Hill) (submittedVersion)
  • UNC Libraries
Funders
National Institute on Alcohol Abuse and Alcoholism (P60 AA011605, U24 AA020024, U01 AA019972, R00 DA031790)
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 › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
Keywords
Pavlovian conditioned approach, sign-tracking, goal tracking, sex differences, binge drinking, GLT-1, glutamate transporters, nucleus accumbens, glutamate homeostasis
MeSH terms
Age Factors, Ethanol, Animals, Conditioning, Classical, Female, Male, Reaction Time, Sex Factors, Rats, Sprague-Dawley, Rats, Binge Drinking

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