Glutamate Receptor Exocytosis and Spine Enlargement during Chemically Induced Long-Term Potentiation
Open accessAbstract
The changes in synaptic morphology and receptor content that underlie neural plasticity are poorly understood. Here, we use a pH-sensitive green fluorescent protein to tag recombinant glutamate receptors and monitor their dynamics onto dendritic spine surfaces. We show that chemically induced long-term potentiation (chemLTP) drives robust exocytosis of AMPA receptors. In contrast, the same stimulus produces a small reduction of NMDA receptors from the spine surface. chemLTP produces similar modification of small and large spines. Interestingly, during chemLTP induction, spines increase in volume before accumulation of AMPA receptors on their surface, indicating that distinct mechanisms underlie changes in morphology and receptor content.
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Spine enlargement associated with LTP can be immediately induced by intensive stimulation of postsynaptic NMDA-sensitive glutamate receptors (the conventional protocol) in CA1 pyramidal neurons.
“The spine enlargement associated with LTP can be immediately induced by intensive stimulation of postsynaptic N-methyl-d-aspartate (NMDA)–sensitive glutamate receptors (the conventional protocol) in CA1 pyramidal neurons (3–5).”
From Protein synthesis and neurotrophin-dependent structural plasticity of single dendritic spines (2008) · cites this paper as [5]
The section “LTP induction using a global protocol” reports increased spine size in CA1 neurons after a chemical treatment that favors NMDA-receptor activation; APV blocked the effect. The Discussion describes the enlargement as rapid. But the paper distinguishes this chemical protocol from conventional electrical stimulation of afferent fibers, so it does not establish the claim specifically for the conventional protocol. (LLM, conf=0.86)
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“The plasticity was thought to be in part activity-dependent, because spine volume increases with long-term potentiation (Matsuzaki et al., 2004; Kopec et al., 2006; Noguchi et al., 2019).”
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- Authors
- Kopec, C. D., Li, B., Wei, W., Boehm, J., & Malinow, R.
- Affiliations
- Cold Spring Harbor Laboratory (US)
- Corresponding author
- Malinow, Roberto
- Venue
- The Journal of Neuroscience
- Publisher
- Society for Neuroscience
- Published
- 2006-02-15
- Volume
- 26
- Issue
- 7
- Pages
- 2000-2009
- ISSN
- 0270-6474 (ISSN-L)
- 1529-2401
- PMC
- PMC6674938
- OpenAlex
- W2087824537
- Cited by
- 486
- References
- 8
- Citations by year
- 2026: 6 · 2025: 17 · 2024: 21 · 2023: 17 · 2022: 19 · 2021: 27 · 2020: 20 · 2019: 26 · 2018: 22 · 2017: 15 · 2016: 26 · 2015: 20 · 2014: 30 · 2013: 33 · 2012: 31
- FWCI
- 13.26
- Type
- journal article
- Language
- en
- Open access
- hybrid
- doi.org
- Licence
- Locations
- Journal of Neuroscience (publishedVersion, cc-by-nc-sa)
- Europe PMC (PubMed Central) (publishedVersion)
- PubMed Central (publishedVersion)
- PubMed (publishedVersion)
- Cold Spring Harbor Laboratory Institutional Repository (Cold Spring Harbor Laboratory) (acceptedVersion)
- Funders
- Alzheimer's Association
- Fidelity Foundation
- Deutsche Forschungsgemeinschaft
- National Institutes of Health
- Topics
- Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
- Life Sciences › Neuroscience › Cognitive Neuroscience › Memory and Neural Mechanisms
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Cellular transport and secretion
- Keywords
- long-term potentiation, AMPA receptors, NMDA receptor, synaptic morphology, synaptic plasticity
- MeSH terms
- Animals, Exocytosis, Hippocampus, Spine, Synapses, Transfection, Receptors, Glutamate, Long-Term Potentiation, Receptors, AMPA, Rats, In Vitro Techniques
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