Cited by 166Neurogenesis and neuroplasticity mechanismsPrenatal Substance Exposure EffectsMemory and Neural Mechanisms

Binge ethanol exposure during adolescence leads to a persistent loss of neurogenesis in the dorsal and ventral hippocampus that is associated with impaired adult cognitive functioning

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Vetreno, Ryan P., Crews, Fulton T.·2015·Frontiers in Neuroscience

Abstract

Adolescence is a developmental period that coincides with the maturation of adult cognitive faculties. Binge drinking is common during adolescence and can impact brain maturation. Using a rodent model of adolescent intermittent ethanol (AIE; 5.0 g/kg, i.g., 20% EtOH w/v; 2 days on/2 days off from postnatal day [P]25 to P55), we discovered that AIE treatment reduced neurogenesis (i.e., doublecortin-immunoreactive [DCX + IR] cells) in both the dorsal and ventral hippocampal dentate gyrus of late adolescent (P56) male Wistar rats that persisted during abstinence into adulthood (P220). This reduction in neurogenesis was accompanied by a concomitant reduction in proliferating cells (Ki-67) and an increase in cell death (cleaved caspase-3). In the hippocampus, AIE treatment induced a long-term upregulation of neuroimmune genes, including Toll-like receptor 4 (TLR4) and its endogenous agonist high-mobility group box 1 as well as several proinflammatory signaling molecules. Administration of lipopolysaccharide, a gram-negative endotoxin agonist at TLR4, to young adult rats (P70) produced a similar reduction of DCX + IR cells that was observed in AIE-treated animals. Behaviorally, AIE treatment impaired object recognition on the novel object recognition task when assessed from P163 to P165. Interestingly, object recognition memory was positively correlated with DCX + IR in both the dorsal and ventral hippocampal dentate gyrus while latency to enter the center of the apparatus was negatively correlated with DCX + IR in the ventral dentate gyrus. Together, these data reveal that adolescent binge ethanol exposure persistently inhibits neurogenesis throughout the hippocampus, possibly through neuroimmune mechanisms, which might contribute to altered adult cognitive and emotive function.

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  • Persistent HC damage following intermittent alcohol exposure has been documented, with alcohol exposure in rats during the adolescent period leading to decreases in doublecortin labeled neurons, Ki-67 labeled cells, and BDNF, and increases in cleaved caspase-3 in the HC in adulthood.

    “Moreover, persistent HC damage following intermittent alcohol exposure has also been documented, with alcohol exposure in rats during the adolescent period leading to decreases in doublecortin labeled neurons (marker of neurogenesis), Ki-67 labeled cells (marker of cell proliferation), and BDNF, and increases in cleaved caspase-3 (marker of cell death) in the HC in adulthood (Vetreno and Crews 201”

    From The long-term cognitive consequences of adolescent exposure to recreational drugs of abuse (2018) · cites this paper as Vetreno and Crews 2015

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  • Adolescent alcohol exposure inhibits neurogenesis throughout the hippocampus, produces long-lasting reductions in dendritic spine density and alterations in morphology, increases levels of astrocytic glial fibrillary acidic protein, and decreases levels of brain-derived neurotrophic factor.

    “Researchers have found that AAE inhibits neurogenesis throughout the hippocampus [64, 65], produces long-lasting reductions in dendritic spine density and alterations in morphology [66], increased levels of astrocytic glial fibrillary acidic protein (GFAP), and decreased levels of brain-derived neurotrophic factor (BDNF) [56].”

    From Consequences of adolescent drug use (2023) · cites this paper as [64]

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Authors
Vetreno, R. P., & Crews, F. T.
Affiliations
University of North Carolina at Chapel Hill (US)
Corresponding author
Vetreno, Ryan P.
Venue
Frontiers in Neuroscience
Published
2015-02-12
Volume
9
Pages
35-35
ISSN
1662-453X (ISSN-L)
OpenAlex
W2008509697
Cited by
166
References
58
Citations by year
2026: 5 · 2025: 13 · 2024: 10 · 2023: 14 · 2022: 12 · 2021: 24 · 2020: 16 · 2019: 19 · 2018: 16 · 2017: 19 · 2016: 13 · 2015: 5
FWCI
7.16
Type
journal article
Language
en
Open access
Licence
cc-by
Locations
  • Frontiers in Neuroscience (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • Carolina Digital Repository (University of North Carolina at Chapel Hill) (submittedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
  • UNC Libraries
Funders
  • Center for Alcohol Studies
  • National Institutes of Health (AA-11605, AA007573, AA019767)
  • National Institute on Alcohol Abuse and Alcoholism (P50AA011605, U24AA020022, U01AA020023, L40 AA021590, F32AA021040, U24AA020024, U54AA019767, P60AA011605, T32AA007573)
Topics
  • Life Sciences › Neuroscience › Developmental Neuroscience › Neurogenesis and neuroplasticity mechanisms
  • Health Sciences › Medicine › Pediatrics, Perinatology and Child Health › Prenatal Substance Exposure Effects
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Memory and Neural Mechanisms
Keywords
hippocampal neurogenesis, dentate gyrus, doublecortin, neuroimmune signaling, TLR4, high mobility group box 1, lipopolysaccharide, object recognition memory, cognitive impairment, cell death, caspase-3, Ki-67, brain maturation

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