Cited by 29Neuroscience and Neuropharmacology ResearchMemory and Neural MechanismsTrace Elements in Health

Influx of extracellular Zn2+ into the hippocampal CA1 neurons is required for cognitive performance via long-term potentiation

Takeda, A., Suzuki, M., Tempaku, M., Ohashi, K., Tamano, H.·2015·Neuroscience

Abstract

Physiological significance of synaptic Zn(2+) signaling was examined in the CA1 of young rats. In vivo CA1 long-term potentiation (LTP) was induced using a recording electrode attached to a microdialysis probe and the recording region was locally perfused with artificial cerebrospinal fluid (ACSF) via the microdialysis probe. In vivo CA1 LTP was inhibited under perfusion with CaEDTA and ZnAF-2DA, extracellular and intracellular Zn(2+) chelators, respectively, suggesting that the influx of extracellular Zn(2+) is required for in vivo CA1 LTP induction. The increase in intracellular Zn(2+) was chelated with intracellular ZnAF-2 in the CA1 1h after local injection of ZnAF-2DA into the CA1, suggesting that intracellular Zn(2+) signaling induced during learning is blocked with intracellular ZnAF-2 when the learning was performed 1h after ZnAF-2DA injection. Object recognition was affected when training of object recognition test was performed 1h after ZnAF-2DA injection. These data suggest that intracellular Zn(2+) signaling in the CA1 is required for object recognition memory via LTP. Surprisingly, in vivo CA1 LTP was affected under perfusion with 0.1-1μM ZnCl2, unlike the previous data that in vitro CA1 LTP was enhanced in the presence of 1-5μM ZnCl2. The influx of extracellular Zn(2+) into CA1 pyramidal cells has bidirectional action in CA1 LTP. The present study indicates that the degree of extracellular Zn(2+) influx into CA1 neurons is critical for LTP and cognitive performance.

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Crossref · 10.1016/j.neuroscience.2015.07.042

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  • Maternal malnutrition affects brain development and probably represents a leading factor in the pathogenesis of neurological and psychiatric disorders in offspring.

    “several studies showed that maternal malnutrition affects brain development and probably represents a leading factor in the pathogenesis of neurological and psychiatric disorders in an offspring [60,61,62].”

    From Beneficial Effects of Spirulina Consumption on Brain Health (2022) · cites this paper as [61]

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Authors
Takeda, A., Suzuki, M., Tempaku, M., Ohashi, K., & Tamano, H.
Affiliations
Shizuoka University (JP)
Corresponding author
Takeda, A.
Venue
Neuroscience
Publisher
Elsevier BV
Published
2015-09
Volume
304
Pages
209-216
ISSN
0306-4522 (ISSN-L)
OpenAlex
W1027953470
Cited by
29
References
33
Citations by year
2025: 1 · 2024: 1 · 2022: 3 · 2021: 2 · 2020: 2 · 2019: 3 · 2018: 2 · 2017: 7 · 2016: 6 · 2015: 2
FWCI
2.63
Type
journal article
Language
en
Open access
closed
Locations
  • Neuroscience (publishedVersion)
  • PubMed (publishedVersion)
Funders
Japan Society for the Promotion of Science (25293032)
Topics
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Memory and Neural Mechanisms
  • Health Sciences › Nursing › Nutrition and Dietetics › Trace Elements in Health
Keywords
extracellular zinc, hippocampal CA1, long-term potentiation, zinc influx, zinc chelators, object recognition memory, cognitive performance, pyramidal neurons, zinc chloride
MeSH terms
Animals, Cations, Chelating Agents, Chlorides, Cognition, Dose-Response Relationship, Drug, Extracellular Space, Male, Memory Disorders, Microelectrodes, Neurons, Neuropsychological Tests, Psychotropic Drugs, Zinc, Rats, Wistar, Microdialysis, Long-Term Potentiation, Zinc Compounds, Excitatory Postsynaptic Potentials, Recognition, Psychology, CA1 Region, Hippocampal

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