Cited by 27Nicotinic Acetylcholine Receptors StudyNeuroscience and Neuropharmacology ResearchPrenatal Substance Exposure Effects

Early postnatal nicotine exposure causes hippocampus-dependent memory impairments in adolescent mice: association with altered nicotinic cholinergic modulation of LTP, but not impaired LTP

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Nakauchi, Sakura, Malvaez, Melissa, Su, Hailing, Kleeman, Elise, Dang, Richard, Wood, Marcelo A., Sumikawa, Katumi·2015·Neurobiology of Learning and Memory

Abstract

Fetal nicotine exposure from smoking during pregnancy causes long-lasting cognitive impairments in offspring, yet little is known about the mechanisms that underlie this effect. Here we demonstrate that early postnatal exposure of mouse pups to nicotine via maternal milk impairs long-term, but not short-term, hippocampus-dependent memory during adolescence. At the Schaffer collateral (SC) pathway, the most widely studied synapses for a cellular correlate of hippocampus-dependent memory, the induction of N-methyl-D-aspartate receptor-dependent transient long-term potentiation (LTP) and protein synthesis-dependent long-lasting LTP are not diminished by nicotine exposure, but rather unexpectedly the threshold for LTP induction becomes lower after nicotine treatment. Using voltage sensitive dye to visualize hippocampal activity, we found that early postnatal nicotine exposure also results in enhanced CA1 depolarization and hyperpolarization after SC stimulation. Furthermore, we show that postnatal nicotine exposure induces pervasive changes to the nicotinic modulation of CA1 activity: activation of nicotinic receptors no longer increases CA1 network depolarization, acute nicotine inhibits rather than facilitates the induction of LTP at the SC pathway by recruiting an additional nicotinic receptor subtype, and acute nicotine no longer blocks LTP induction at the temporoammonic pathway. These findings reflect the pervasive impact of nicotine exposure during hippocampal development, and demonstrate an association of hippocampal memory impairments with altered nicotinic cholinergic modulation of LTP, but not impaired LTP. The implication of our results is that nicotinic cholinergic-dependent plasticity is required for long-term memory formation and that postnatal nicotine exposure disrupts this form of plasticity.

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  • Mouse pups exposed to nicotine during the first two postnatal weeks also show substantial impairment of long-term hippocampal dependent spatial memory during adolescence.

    “Mouse pups exposed to nicotine during the first two postnatal weeks also show substantial impairment of long-term hippocampal dependent spatial memory during adolescence [85].”

    From Nicotine on the developing brain. (2023) · cites this paper as [85]

  • Cognitive deficits from prenatal nicotine exposure reflect effects on nAChR modulation of long-term potentiation in the hippocampus.

    “Research suggests that these deficits reflect effects on nAChR modulation of long-term potentiation in the hippocampus.”
  • Animal studies of prenatal nicotine exposure and cognitive development are more consistent, suggesting global learning and memory impairments.

    “there is greater consistency among animal studies examining the effects of prenatal nicotine exposure on cognitive development, suggestive of global impairments in learning and memory.”

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Authors
Nakauchi, S., Malvaez, M., Su, H., Kleeman, E., Dang, R., Wood, M. A., & Sumikawa, K.
Affiliations
University of California, Irvine (US)
Venue
Neurobiology of Learning and Memory
Publisher
Elsevier BV
Published
2015-02
Volume
118
Pages
178-188
ISSN
1074-7427 (ISSN-L)
OpenAlex
W2020826705
Cited by
27
References
64
Citations by year
2026: 1 · 2025: 2 · 2024: 3 · 2023: 2 · 2022: 1 · 2021: 2 · 2020: 1 · 2019: 2 · 2018: 2 · 2017: 4 · 2016: 6 · 2015: 1
FWCI
1.50
Type
journal article
Language
en
Open access
Locations
  • Neurobiology of Learning and Memory (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
  • eScholarship (California Digital Library) (submittedVersion)
Funders
  • NIDA (DA025269, DA025676, and DA026458)
  • NIMH and NIDA (MH101491, DA036984, and DA031989)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Nicotinic Acetylcholine Receptors Study
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
  • Health Sciences › Medicine › Pediatrics, Perinatology and Child Health › Prenatal Substance Exposure Effects
Keywords
prenatal nicotine exposure, maternal smoking, hippocampal-dependent memory, long-term potentiation, nicotinic acetylcholine receptors, cholinergic modulation, Schaffer collateral pathway, temporoammonic pathway, adolescent mice, hippocampal development, memory impairment
MeSH terms
Age Factors, Animals, Anxiety, Female, Hippocampus, Male, Memory Disorders, Mice, Inbred C57BL, Neurons, Nicotine, Long-Term Potentiation, Nicotinic Agonists, Nicotinic Antagonists, Recognition, Psychology, Mice, Spatial Memory

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