Cited by 16Smoking Behavior and CessationNeurotransmitter Receptor Influence on BehaviorNicotinic Acetylcholine Receptors Study

Age- and sex-dependent nicotine pretreatment effects on the enhancement of methamphetamine self-administration in Sprague-Dawley rats

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Cardenas, Anjelica, Lotfipour, Shahrdad·2022·Nicotine & Tobacco Research

Abstract

INTRODUCTION: Initiation of tobacco products typically occurs in adolescence. Adolescence is a critical period in development where the maturation of brain neurocircuitry is vulnerable to nicotine. Nicotine-containing products and psychostimulants, such as methamphetamine (METH), are often coabused. Rodent studies have shown that nicotine exposure in early adolescence increases subsequent drug intake and reward. Given the exponential increase in e-cigarette use among adolescents, there is a pressing need to understand whether adolescent nicotine exposure impacts concurrent increased METH use. The objective of this study is to evaluate age, sex, and longitudinal effects of nicotine pretreatment on METH reinforcement. AIMS AND METHODS: Male and female Sprague-Dawley rats were pretreated with a subchronic, low-dose nicotine (2×, 30 µg/kg/0.1 mL, intravenous) or saline during early adolescence (postnatal days [PN] 28-31) or adulthood (PN 86-89). Following nicotine pretreatment, on PN 32 or PN 90, animals underwent operant intravenous self-administration for METH (20 µg/kg/inf) over a 2-hour period for five consecutive days. RESULTS: Early adolescent nicotine exposure enhances intravenous METH self-administration in male, but not female adolescents. Male adult rats self-administer METH over the 5-day testing period, independent of nicotine exposure. In contrast, nicotine exposure increases METH self-administration in female adults during the later sessions of the 5-day testing period. CONCLUSIONS: Taken together, our data highlight age- and sex-dependent effects of low dose, subchronic nicotine pretreatment on subsequent intravenous METH self-administration. IMPLICATIONS: A majority of polysubstance users begin smoking before the age of 18. Mounting evidence highlights adolescent susceptibility to nicotine exposure on brain and behavior. With the escalation in nicotine-containing products and stimulant use among adolescents, it is important to identify the consequences from adolescent nicotine use, including polysubstance use. Our study provides evidence that adolescent nicotine exposure enhances subsequent METH use, with important sex- and age-dependent effects.

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  • Brief pretreatment of early adolescent rats (P28-31) with a low dose of nicotine that models smoking initiation significantly increases self-administration of cocaine, ethanol, fentanyl, and methamphetamine when compared to adults.

    “Brief pretreatment of early adolescent rats (postnatal days (P) 28–31) with a low dose of nicotine that models smoking initiation significantly increases self-administration of cocaine, ethanol, fentanyl, and methamphetamine when compared to adults [146–151].”

    From Nicotine on the developing brain. (2023) · cites this paper as [151]

    The Introduction describes the P28–31 nicotine pretreatment as a model of smoking initiation, and the Discussion reports prior age-dependent findings for cocaine, ethanol, fentanyl, and methamphetamine. But the paper’s own methamphetamine results show increased intake after nicotine pretreatment in adolescent males, not adolescent females; adult females also showed an increase. The Results report greater methamphetamine intake in adults overall, so the claim that adolescent self-administration was significantly higher than adults’ is not supported. Page numbers are unavailable in our copy. (LLM, conf=0.88)

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Research works printed but not linked: 1

  1. Yuan M, Cross SJ, Loughlin SE, Leslie FM. Nicotine and the adolescent brain. J Physiol. 2015;593(16):3397-3412.

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Authors
Cardenas, A., & Lotfipour, S.
Affiliations
University of California, Irvine (US)
Corresponding author
Lotfipour, Shahrdad
Venue
Nicotine & Tobacco Research
Published
2021-10-20
Volume
24
Issue
8
Pages
1186-1192
ISSN
  • 1462-2203 (ISSN-L)
  • 1469-994X
OpenAlex
W3206611930
Cited by
16
References
49
Citations by year
2026: 3 · 2025: 1 · 2024: 3 · 2023: 6 · 2022: 3
FWCI
1.89
Type
journal article
Language
en
Open access
Locations
  • Nicotine & Tobacco Research (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • eScholarship (California Digital Library) (submittedVersion)
Funders
  • Tobacco-Related Disease Research Program Project (T31IP1427, 22RT-0103)
  • UCI Institute for Clinical and Translational Sciences
  • Pilot Studies Program
  • UCI Department of Emergency Medicine Prestige Funds
  • Brain and Behavior Research (21517)
  • UCI School of Medicine Start Up funds
  • Ford Foundation Fellowship and the UC President’s Pre-Professoriate Fellowship
  • National Institutes of Health
Topics
  • Health Sciences › Medicine › Physiology › Smoking Behavior and Cessation
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neurotransmitter Receptor Influence on Behavior
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Nicotinic Acetylcholine Receptors Study
Keywords
nicotine, methamphetamine, adolescent nicotine exposure, self-administration, sex differences, age-dependent effects, polydrug use, electronic cigarettes, adolescent brain development
MeSH terms
Central Nervous System Stimulants, Animals, Conditioning, Operant, Male, Methamphetamine, Nicotine, Self Administration, Rats, Sprague-Dawley, Rats, Electronic Nicotine Delivery Systems

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