Cited by 75Neuroscience and Neuropharmacology ResearchEpigenetics and DNA MethylationStress Responses and Cortisol

Adolescent Alcohol Exposure Epigenetically Suppresses Amygdala Arc Enhancer RNA Expression to Confer Adult Anxiety Susceptibility

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Kyzar, Evan J., Zhang, Huaibo, Pandey, Subhash C.·2019·Biological Psychiatry

Abstract

BACKGROUND: Adolescent intermittent ethanol (AIE) exposure is an emerging risk factor for adult psychopathology such as anxiety disorders. Enhancer RNAs (eRNAs) are short non-coding RNAs transcribed from enhancer regions that regulate synaptic plasticity-associated gene expression including activity-regulated cytoskeleton-associated protein (Arc), but their role in AIE-induced anxiety susceptibility in adulthood is unknown. METHODS: Rats were exposed to ethanol (2 days on/off; AIE) or intermittent n-saline (AIS) during postnatal days (PND) 28–41 and allowed to grow to adulthood for analysis of behavior and biochemical measures. Some AIE and AIS rats were exposed to an acute challenge with ethanol in adulthood. Cohorts of alcohol-naïve adult rats were cannulated in the central nucleus of amygdala (CeA) and infused with either lysine demethylase 6B(Kdm6b) small interfering RNA (siRNA) or an antisense locked nucleic acid (LNA) oligonucleotide specific to Arc eRNA prior to behavioral and biochemical analysis. RESULTS: AIE adult rats display heightened anxiety and decreased Arc eRNA expression, which is regulated epigenetically through decreased KDM6B expression. This triggers condensed chromatin at the synaptic activity response element (SARE) site and promoter of the Arc gene, facilitating increased negative elongation factor (NELF) binding to the Arc promoter and decreasing Arc expression in the amygdala. Knockdown of Kdm6b or Arc eRNA expression in the CeA provokes anxiety in naïve adult rats and recapitulates the molecular and epigenetic phenotypes of AIE. CONCLUSION: These data suggest that eRNA regulation via epigenetic reprogramming in the amygdala, particularly at the Arc SARE site, contributes to adult anxiety after adolescent alcohol exposure.

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  • Adolescent alcohol exposure-induced epigenetic repression of the synaptic activity response element within the immediate-early gene Arc in the central amygdala is a critical mediator for anxiety-like behavior.

    “Recent evidence points to AAE-induced epigenetic repression of the synaptic activity response element (SARE) within the immediate-early gene activity-regulated cytoskeleton-associated protein (Arc) in the central amygdala (CeA) [51, 52] as a critical mediator for anxiety-like behavior.”

    From Consequences of adolescent drug use (2023) · cites this paper as [51]

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Authors
Kyzar, E. J., Zhang, H., & Pandey, S. C.
Affiliations
University of Illinois Chicago (US)
Corresponding author
Pandey, Subhash C.
Venue
Biological Psychiatry
Publisher
Elsevier BV
Published
2019-06
Volume
85
Issue
11
Pages
904-914
ISSN
0006-3223 (ISSN-L)
OpenAlex
W2910936809
Cited by
75
References
55
Citations by year
2026: 1 · 2025: 7 · 2024: 11 · 2023: 12 · 2022: 13 · 2021: 15 · 2020: 10 · 2019: 6
FWCI
5.26
Type
journal article
Language
en
Open access
Locations
  • Biological Psychiatry (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • National Institute on Alcohol Abuse and Alcoholism (UO1AA-019971, U24AA-024605)
  • Neurobiology of Adolescent Drinking in Adulthood (RO1AA-010005, RO1AA-021662, P50AA-022538)
  • Department of Veterans Affairs (Senior Research Career Scientist
  • Individual National Research Service (F30 AA024948)
Topics
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Epigenetics and DNA Methylation
  • Life Sciences › Neuroscience › Behavioral Neuroscience › Stress Responses and Cortisol
Keywords
adolescent intermittent ethanol exposure, KDM6B, epigenetic reprogramming, amygdala, NELF, condensed chromatin, alcohol exposure, anxiety disorders, synaptic plasticity
MeSH terms
Age Factors, Amygdala, Animals, Anxiety, Cytoskeletal Proteins, Enhancer Elements, Genetic, Male, Microinjections, Nerve Tissue Proteins, Oligonucleotides, Antisense, RNA, Small Interfering, Epigenesis, Genetic, Rats, Jumonji Domain-Containing Histone Demethylases, RNA, Small Untranslated

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