Cited by 87Smoking Behavior and CessationNicotinic Acetylcholine Receptors StudyNeurotransmitter Receptor Influence on Behavior

Role of central amygdala neuronal ensembles in incubation of nicotine craving

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Funk, Douglas, Coen, Kathleen, Tamadon, Sahar, Hope, Bruce T., Shaham, Yavin, Lê, A.D.·2016·The Journal of Neuroscience

Abstract

UNLABELLED: The craving response to smoking-associated cues in humans or to intravenous nicotine-associated cues in adult rats progressively increases or incubates after withdrawal. Here, we further characterized incubation of nicotine craving in the rat model by determining whether this incubation is observed after adolescent-onset nicotine self-administration. We also used the neuronal activity marker Fos and the Daun02 chemogenetic inactivation procedure to identify cue-activated neuronal ensembles that mediate incubation of nicotine craving. We trained adolescent and adult male rats to self-administer nicotine (2 h/d for 12 d) and assessed cue-induced nicotine seeking in extinction tests (1 h) after 1, 7, 14, or 28 withdrawal days. In both adult and adolescent rats, nicotine seeking in the relapse tests followed an inverted U-shaped curve, with maximal responding on withdrawal day 14. Independent of the withdrawal day, nicotine seeking in the relapse tests was higher in adult than in adolescent rats. Analysis of Fos expression in different brain areas of adolescent and adult rats on withdrawal days 1 and 14 showed time-dependent increases in the number of Fos-positive neurons in central and basolateral amygdala, orbitofrontal cortex, ventral and dorsal medial prefrontal cortex, and nucleus accumbens core and shell. In adult Fos-lacZ transgenic rats, selective inactivation of nicotine-cue-activated Fos neurons in central amygdala, but not orbitofrontal cortex, decreased "incubated" nicotine seeking on withdrawal day 14. Our results demonstrate that incubation of nicotine craving occurs after adolescent-onset nicotine self-administration and that neuronal ensembles in central amygdala play a critical role in this incubation. SIGNIFICANCE STATEMENT: The craving response to smoking-associated cues in humans or to intravenous nicotine-associated cues in adult rats progressively increases or incubates after withdrawal. It is currently unknown whether incubation of craving also occurs after adolescent-onset nicotine self-administration. The brain areas that mediate such incubation are also unknown. Here, we used a rat model of incubation of drug craving, the neuronal activity marker Fos, and the Daun02 chemogenetic inactivation method to demonstrate that incubation of nicotine craving is also observed after adolescent-onset nicotine self-administration and that neuronal ensembles in the central nucleus of the amygdala play a critical role in this incubation in adult rats.

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Crossref · 10.1523/jneurosci.1505-16.2016

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  • In Funk et al. (2016), FosB expression in the dorsal mPFC on day 1 and 14 after nicotine was increased in adults versus adolescents and age-matched controls.

    “FosB in the dorsal mPFC- Day 1 and 14 after nicotine: Adults ↑ vs adolescents and age-matched controls.”

    From Age-dependent Effects of Tobacco Smoke and Nicotine on Cognition and the Brain: A Systematic Review of the Human and Animal Literature Comparing Adolescents and Adults. (2023) · cites this paper as Funk et al. (2016)

    The Fos expression section (page unavailable) reports somewhat higher dorsal mPFC Fos expression in adult than adolescent rats on withdrawal days 1 and 14 after nicotine self-administration. It measures Fos, not FosB, and does not establish the claimed increase over age-matched controls; its separate basal-Fos groups showed no age difference and were not directly compared with the extinction-test groups. (LLM, conf=0.90)

    Experimental — accuracy not yet measured
  • In Funk et al. (2016), active lever presses were increased in adults versus adolescents and age-matched controls.

    “Active lever presses: Adults ↑ vs adolescents and age-matched controls.”

    From Age-dependent Effects of Tobacco Smoke and Nicotine on Cognition and the Brain: A Systematic Review of the Human and Animal Literature Comparing Adolescents and Adults. (2023) · cites this paper as Funk et al. (2016)

    The ‘Incubation of nicotine craving’ section reports more active-lever presses by adult than adolescent rats during extinction tests. It does not report a comparison with age-matched controls; the ‘Nicotine self-administration training’ section also reports no age difference during training. (LLM, conf=0.88)

    Experimental — accuracy not yet measured
  • In Funk et al. (2016), FosB expression in ventral mPFC, OFC, NAc core and shell, CeA and BLA showed no age differences and no effect of nicotine.

    “FosB in ventral mPFC, OFC, NAc core and shell, CeA and BLA: No age differences. No effect of nicotine.”

    From Age-dependent Effects of Tobacco Smoke and Nicotine on Cognition and the Brain: A Systematic Review of the Human and Animal Literature Comparing Adolescents and Adults. (2023) · cites this paper as Funk et al. (2016)

    The Fos expression section reports no age effect in the listed regions for rats tested after nicotine withdrawal; the reported age effect was confined to dorsal mPFC. But the paper measured Fos, not FosB, and its comparison of withdrawal days does not establish that nicotine had no effect. (LLM, conf=0.84)

    Experimental — accuracy not yet measured
  • In rats, cue-induced drug-seeking behaviour increased with longer withdrawal duration in both adolescent- and adult-exposed groups.

    “Both age groups showed cue-induced drug- seeking behaviour that increased with longer withdrawal duration.”

    From Age-dependent Effects of Tobacco Smoke and Nicotine on Cognition and the Brain: A Systematic Review of the Human and Animal Literature Comparing Adolescents and Adults. (2023) · cites this paper as Funk et al., 2016

    The “Incubation of nicotine craving” results report time-dependent cue-induced responding in both adolescent and adult rats, peaking on withdrawal day 14. The claim omits the subsequent decline: responding followed an inverted U-shaped curve, rather than increasing throughout the longer withdrawal periods. Page numbers are not provided in our copy. (LLM, conf=0.87)

    Experimental — accuracy not yet measured
  • Withdrawal-induced craving is higher when nicotine exposure occurs during adulthood than during adolescence.

    “This suggests withdrawal-induced craving is higher when exposed to nicotine during adulthood.”

    From Age-dependent Effects of Tobacco Smoke and Nicotine on Cognition and the Brain: A Systematic Review of the Human and Animal Literature Comparing Adolescents and Adults. (2023) · cites this paper as Funk et al., 2016

    The ‘Incubation of nicotine craving’ results report more active-lever presses after withdrawal in adult than adolescent rats, regardless of withdrawal day. The claim omits that this was cue-induced nicotine seeking measured in rats; the study also found no age-by-withdrawal-day interaction, so it does not establish a greater increase in craving over withdrawal in adults. (LLM, conf=0.86)

    Experimental — accuracy not yet measured

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Research works printed but not linked: 1

  1. [28]28. Heilig M, Epstein DE, Nader M, Shaham Y (2016) It is time to connect: Addiction neuroscience and social context. Nat Rev Neurosci, in press.

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Authors
Funk, D., Coen, K., Tamadon, S., Hope, B. T., Shaham, Y., & Lê, A. D.
Affiliations
  • Centre for Addiction and Mental Health (CA)
  • National Institutes of Health (US)
Venue
The Journal of Neuroscience
Published
2016-08-17
Volume
36
Issue
33
Pages
8612-8623
ISSN
  • 0270-6474 (ISSN-L)
  • 1529-2401
OpenAlex
W2510803292
Cited by
87
References
78
Citations by year
2026: 5 · 2025: 4 · 2024: 6 · 2023: 12 · 2022: 8 · 2021: 5 · 2020: 8 · 2019: 7 · 2018: 14 · 2017: 15 · 2016: 3
FWCI
10.47
Type
journal article
Language
en
Open access
Locations
  • Journal of Neuroscience (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health
  • National Institute on Drug Abuse (R21DA034394)
Topics
  • Health Sciences › Medicine › Physiology › Smoking Behavior and Cessation
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Nicotinic Acetylcholine Receptors Study
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neurotransmitter Receptor Influence on Behavior
Keywords
nicotine craving, incubation of craving, central amygdala, neuronal ensembles, nicotine self-administration, adolescent nicotine exposure, nicotine withdrawal, Fos expression, chemogenetic inactivation, nicotine seeking, relapse
MeSH terms
Age Factors, Animals, Animals, Newborn, beta-Galactosidase, Daunorubicin, Extinction, Psychological, Female, Neurons, Nicotine, Phosphopyruvate Hydratase, Self Administration, Substance Withdrawal Syndrome, Sucrose, Time Factors, Oncogene Proteins v-fos, Rats, Sprague-Dawley, Nicotinic Agonists, Rats, Rats, Transgenic, Craving, Central Amygdaloid Nucleus

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