Cited by 87Neuroscience and Neuropharmacology ResearchStress Responses and CortisolMemory and Neural Mechanisms

Rapid spinogenesis of pyramidal neurons induced by activation of glucocorticoid receptors in adult male rat hippocampus

Komatsuzaki, Yoshimasa, Murakami, Gen, Tsurugizawa, Tomokazu, Mukai, Hideo, Tanabe, Nobuaki, Mitsuhashi, Kenji, Kawata, Mitsuhiro, Kimoto, Tetsuya +2 more·2005·Biochemical and Biophysical Research Communications

Abstract

Modulation of hippocampal synaptic plasticity by glucocorticoids has been attracting much attention, due to its importance in stress responses. Dendritic spines are essential for memory storage processes. Here, we investigated the effect of dexamethasone (DEX), a specific agonist of glucocorticoid receptor (GR), on density and morphology of dendritic spines in adult male rat hippocampus by imaging of Lucifer Yellow-injected spines in slices. The application of 100 nM DEX (stressful high concentration) induced rapid modulation of the density and morphology of dendritic spines in CA1 pyramidal neurons within 1h. The total spine density increased from 0.88 spines/microm (control) to 1.36 spines/microm (DEX-treated). DEX significantly increased the density of thin and mushroom type spines, however only a slight increase was observed for stubby and filopodium type spines. Because the presence of 10 microM cycloheximide, an inhibitor of protein synthesis, did not suppress the DEX effect, these responses are probably non-genomic. Western immunoblot analysis demonstrated the localization of classical type GR in Triton-insoluble synaptosomal fractions (enriched in postsynaptic membranes) from hippocampal slices, suggesting a possible action site of DEX at spines.

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Crossref · 10.1016/j.bbrc.2005.07.173

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  • Neurotransmitters such as acetylcholine, GABA, and serotonin produced by bacteria belonging to Lactobacillus, Bifidobacteria, Enterococcus, and Streptococcus species can influence brain cell physiology directly and indirectly.

    “Neurotransmitters, such as acetylcholine, GABA, and serotonin, produced by bacteria belonging to Lactobacillus, Bifidobacteria, Enterococcus, and Streptococcus species, can influence brain cell physiology directly and indirectly (11, 85, 86).”

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Authors
Komatsuzaki, Y., Murakami, G., Tsurugizawa, T., Mukai, H., Tanabe, N., Mitsuhashi, K., Kawata, M., Kimoto, T., Ooishi, Y., & Kawato, S.
Affiliations
  • Meiji University (JP)
  • Japan Science and Technology Agency (JP)
  • Kyoto Prefectural University of Medicine (JP)
Corresponding author
Kawato, Suguru
Venue
Biochemical and Biophysical Research Communications
Publisher
Elsevier BV
Published
2005-10
Volume
335
Issue
4
Pages
1002-1007
ISSN
0006-291X (ISSN-L)
OpenAlex
W2090423881
Cited by
87
References
26
Citations by year
2026: 3 · 2025: 4 · 2024: 3 · 2023: 2 · 2021: 1 · 2020: 3 · 2019: 6 · 2018: 3 · 2017: 2 · 2016: 5 · 2015: 5 · 2014: 3 · 2013: 7 · 2012: 9
FWCI
1.57
Type
journal article
Language
en
Open access
closed
Locations
  • Biochemical and Biophysical Research Communications (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
  • Life Sciences › Neuroscience › Behavioral Neuroscience › Stress Responses and Cortisol
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Memory and Neural Mechanisms
Keywords
glucocorticoid receptor, dexamethasone, dendritic spines, spine density, dendritic spine morphology, pyramidal neurons, hippocampus, CA1, synaptic plasticity, stress response, postsynaptic membrane, synaptosomes
MeSH terms
Animals, Cells, Cultured, Dexamethasone, Dose-Response Relationship, Drug, Hippocampus, Male, Neuronal Plasticity, Receptors, Glucocorticoid, Rats, Wistar, Pyramidal Cells, Cell Enlargement, Dendritic Spines, Rats

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