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Ectopic Release of Synaptic Vesicles
Open accessAbstract
Exocytosis of synaptic vesicles is generally assumed to occur only at ultrastructurally defined presynaptic active zones. If release is restricted to these sites, receptors not located within the synaptic cleft must be activated by transmitter that diffuses out of the cleft or not be activated at all. Here we report that AMPA receptor-mediated quantal events resulting from climbing fiber release are observed in Bergmann glial cells in the cerebellar cortex. These quantal events are not coincident with quanta recorded in neighboring Purkinje cells which receive input from the same climbing fiber. As Bergmann glial membranes are excluded from the synaptic cleft, we propose that exocytosis can occur from climbing fiber release sites located directly across from Bergmann glial membranes. Such ectopic release may account for the majority of the Bergmann glial AMPA response evoked by climbing fiber stimulation.
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“This process can be adjusted on demand either through modulation of neurovascular coupling15–17 or via neuronal signaling to astrocytes18.”
From Energy paradox in REM sleep: balancing supply and consumption in brain metabolism (2026) · cites this paper as [18]
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Metadata
- Authors
- Matsui, K., & Jahr, C. E.
- Affiliations
- Oregon Health & Science University (US)
- Corresponding author
- Jahr, Craig E
- ORCID
- Matsui, Ko
- Venue
- Neuron
- Publisher
- Elsevier BV
- Published
- 2003-12
- Volume
- 40
- Issue
- 6
- Pages
- 1173-1183
- ISSN
- 0896-6273 (ISSN-L)
- OpenAlex
- W2031373742
- Cited by
- 155
- References
- 50
- Citations by year
- 2026: 1 · 2025: 4 · 2024: 12 · 2023: 7 · 2022: 2 · 2021: 5 · 2020: 2 · 2019: 5 · 2018: 3 · 2017: 2 · 2016: 2 · 2015: 13 · 2014: 4 · 2013: 5 · 2012: 5
- FWCI
- 4.50
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Licence
- www.elsevier.com/tdm/userlicense/1.0/ (tdm)
- www.elsevier.com/legal/tdmrep-license (tdm)
- www.elsevier.com/open-access/userlicense/1.0/ (vor, 3516 d)
- doi.org/10.15223/policy-017 (stm-asf)
- doi.org/10.15223/policy-037 (stm-asf)
- doi.org/10.15223/policy-012 (stm-asf)
- doi.org/10.15223/policy-029 (stm-asf)
- doi.org/10.15223/policy-004 (stm-asf)
- Locations
- Neuron (publishedVersion)
- PubMed (publishedVersion)
- Funders
- National Institutes of Health (NS40056)
- Human Frontier Science Program (RG119/2000)
- Japan Society for the Promotion of Science
- Topics
- Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Cellular transport and secretion
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Extracellular vesicles in disease
- Keywords
- exocytosis, AMPA receptors, climbing fibers, Bergmann glia, cerebellar cortex, quantal release, Purkinje cells, synaptic cleft, active zone
- MeSH terms
- Animals, Animals, Newborn, Benzothiadiazines, Cerebellum, Exocytosis, Synaptic Vesicles, Receptors, AMPA, Glutamic Acid, Rats, In Vitro Techniques
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