Importance of AMPA Receptors for Hippocampal Synaptic Plasticity But Not for Spatial Learning
Abstract
Gene-targeted mice lacking the L-alpha-amino-3-hydroxy-5-methylisoxazole-4-propionate (AMPA) receptor subunit GluR-A exhibited normal development, life expectancy, and fine structure of neuronal dendrites and synapses. In hippocampal CA1 pyramidal neurons, GluR-A-/- mice showed a reduction in functional AMPA receptors, with the remaining receptors preferentially targeted to synapses. Thus, the CA1 soma-patch currents were strongly reduced, but glutamatergic synaptic currents were unaltered; and evoked dendritic and spinous Ca2+ transients, Ca2+-dependent gene activation, and hippocampal field potentials were as in the wild type. In adult GluR-A-/- mice, associative long-term potentiation (LTP) was absent in CA3 to CA1 synapses, but spatial learning in the water maze was not impaired. The results suggest that CA1 hippocampal LTP is controlled by the number or subunit composition of AMPA receptors and show a dichotomy between LTP in CA1 and acquisition of spatial memory.
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Application of glutamate to somatic nucleated patches generates nanoamps of AMPAR-mediated current, consistent with a high density of surface AMPARs.
“For instance, application of glutamate to somatic nucleated patches, which are devoid of excitatory synapses, generates nanoamps of AMPAR-mediated current (342), consistent with a high density of surface AMPARs.”
From Synaptic memory and CaMKII (2023) · cites this paper as [342]
Several genes involved in synaptic plasticity, synaptic transmission, and long-term potentiation (Gria1, Grin2b, Wasf1) showed low expression in WT, ApoeCh, and PS19, but were upregulated in PS19;ApoeCh.
“There were also several genes (i.e., Gria1, Grin2b, Wasf1), involved in synaptic plasticity, synaptic transmission, and long-term potentiation that showed low expression in WT, ApoeCh, and PS19, but which were upregulated in PS19;ApoeCh (Fig. 8c) [70–73].”
From APOE Christchurch enhances a disease-associated microglial response to plaque but suppresses response to tau pathology (2025) · cites this paper as [70]
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- Authors
- Zamanillo, D., Sprengel, R., Hvalby, Ø., Jensen, V., Burnashev, N., Rozov, A., Kaiser, K. M. M., Köster, H. J., Borchardt, T., Worley, P., Lübke, J., Frotscher, M., Kelly, P. H., Sommer, B., Andersen, P., Seeburg, P. H., & Sakmann, B.
- Affiliations
- Max Planck Institute for Medical Research (DE)
- University of Oslo (NO)
- Departments of Molecular Neuroscience and Cell Physiology, Max-Planck Institute for Medical Research, Jahnstrasse 29, 69120 Heidelberg, Germany.
- Johns Hopkins University (US)
- Department of Anatomy, University of Freiburg, Albertstrasse 17, D-79104 Freiburg, Germany.
- University of Freiburg (DE)
- Novartis (Switzerland) (CH)
- Corresponding author
- Zamanillo, Daniel
- Sprengel, Rolf
- ORCID
- Venue
- Science
- Published
- 1999-06-11
- Volume
- 284
- Issue
- 5421
- Pages
- 1805-1811
- ISSN
- 0036-8075 (ISSN-L)
- 1095-9203
- OpenAlex
- W2130784302
- Cited by
- 791
- References
- 5
- Citations by year
- 2026: 9 · 2025: 15 · 2024: 14 · 2023: 18 · 2022: 32 · 2021: 24 · 2020: 14 · 2019: 29 · 2018: 26 · 2017: 40 · 2016: 23 · 2015: 32 · 2014: 32 · 2013: 26 · 2012: 34
- FWCI
- 14.10
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Science (publishedVersion)
- PubMed (publishedVersion)
- Max Planck Institute for Plasma Physics (submittedVersion)
- Max Planck Digital Library (submittedVersion)
- FreiDok plus (Universitätsbibliothek Freiburg) (submittedVersion)
- MPG.PuRe (Max Planck Society) (submittedVersion)
- 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 › Genetics › Genetics and Neurodevelopmental Disorders
- Keywords
- AMPA receptors, hippocampal synaptic plasticity, long-term potentiation, spatial learning, CA1 pyramidal neurons, CA3-CA1 synapses, dendritic calcium transients, gene-targeted mice, water maze
- MeSH terms
- Action Potentials, Animals, Bicuculline, Calcium, Dendrites, Hippocampus, Mice, Inbred C57BL, Synaptic Transmission, Synapses, Gene Expression, Receptors, N-Methyl-D-Aspartate, Long-Term Potentiation, Genes, Immediate-Early, Pyramidal Cells, Receptors, AMPA, Gene Targeting, Glutamic Acid, GABA Antagonists, Maze Learning, Mice
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