Cited by 78Neuroscience and Neuropharmacology ResearchGenetics and Neurodevelopmental DisordersMemory and Neural Mechanisms

Synchronized Formation and Remodeling of Postsynaptic Densities: Long-Term Visualization of Hippocampal Neurons Expressing Postsynaptic Density Proteins Tagged with Green Fluorescent Protein

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Ebihara, Tatsuhiko, Kawabata, Izumi, Usui, Shinichi, Sobue, Kenji, Okabe, Shigeo·2003·The Journal of Neuroscience

Abstract

To explore mechanisms governing the formation and remodeling of postsynaptic density (PSD), we used dissociated cultures of hippocampal neurons isolated from transgenic embryos expressing green fluorescent protein (GFP)-tagged PSD proteins PSD-Zip45 (Homer 1c) and PSD-95. Expression of GFP-tagged PSD molecules was stable, and the remodeling process of PSDs could be followed for >1 week. A higher expression level of GFP-PSD-Zip45 enabled us to quantitatively analyze the amount of PSD-Zip45 clusters during development. Repetitive imaging of the same cell populations between 11 and 17 d in culture revealed an increase of the average PSD-Zip45 cluster density from 0.32 to 0.73/μm. Newly generated dendrites rapidly acquired GFP-PSD-Zip45 clusters, and their density reached the level of parental dendrites within a few days. Temporal profiles of GFP-PSD-Zip45 cluster density showed a variety of patterns. Some dendrites showed a monotonous increase of clusters, whereas others showed complex patterns, including short decremental stages. Analysis of long-term remodeling of PSD-95-GFP clusters confirmed that the decremental stages were not specific to the PSD-Zip45 clusters. Comparison of the temporal profiles of the cluster density among neurons indicated synchronization of both GFP-PSD-Zip45 and PSD-95 clustering within individual cells. Furthermore, activation of cAMP-dependent protein kinase suppressed the decremental stages of cluster remodeling. These observations suggest the presence of signaling mechanisms that can induce synchronized addition or elimination of PSD proteins throughout dendritic arborization of a single neuron.

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Crossref · 10.1523/jneurosci.23-06-02170.2003

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Authors
Ebihara, T., Kawabata, I., Usui, S., Sobue, K., & Okabe, S.
Affiliations
  • National Institute of Advanced Industrial Science and Technology (JP)
  • Tokyo Medical and Dental University (JP)
  • The University of Osaka (JP)
Venue
The Journal of Neuroscience
Published
2003-03-15
Volume
23
Issue
6
Pages
2170-2181
ISSN
  • 0270-6474 (ISSN-L)
  • 1529-2401
OpenAlex
W1871421938
Cited by
78
References
41
Citations by year
2024: 1 · 2023: 2 · 2022: 2 · 2021: 1 · 2020: 2 · 2019: 6 · 2018: 1 · 2017: 2 · 2016: 3 · 2015: 4 · 2014: 3 · 2013: 2 · 2012: 3
FWCI
2.54
Type
journal article
Language
en
Open access
Locations
  • Journal of Neuroscience (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Japan Science and Technology Corporation
  • Core Research for Evolutional Science and Technology
Topics
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetics and Neurodevelopmental Disorders
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Memory and Neural Mechanisms
Keywords
postsynaptic density, PSD-95, dendritic branching, dendritic spine development, protein kinase A, hippocampal neurons, synaptic plasticity
MeSH terms
Homer Scaffolding Proteins, Disks Large Homolog 4 Protein, Cyclic AMP, Animals, Bacterial Proteins, Carrier Proteins, Cells, Cultured, Dendrites, Hippocampus, Luminescent Proteins, Membrane Proteins, Mice, Transgenic, Nerve Tissue Proteins, Neurons, Neuropeptides, Recombinant Fusion Proteins, Synapses, Signal Transduction, Gene Expression Regulation, Developmental, Transgenes, Intracellular Signaling Peptides and Proteins, Green Fluorescent Proteins, Mice, Guanylate Kinases

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