Cited by 78Neuroscience and Neuropharmacology ResearchAmino Acid Enzymes and MetabolismIon channel regulation and function

The receptor subunits generating NMDA receptor mediated currents in oligodendrocytes: Oligodendrocyte NMDA responses

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Burzomato, Valeria, Frugier, Guillaume, Pérez-Otaño, Isabel, Kittler, Josef T., Attwell, David·2010·The Journal of Physiology

Abstract

NMDA receptors have been shown to contribute to glutamate-evoked currents in oligodendrocytes. Activation of these receptors damages myelin in ischaemia, in part because they are more weakly blocked by Mg(2+) than are most neuronal NMDA receptors. This weak Mg(2+) block was suggested to reflect an unusual subunit composition including the NR2C and NR3A subunits. Here we expressed NR1/NR2C and triplet NR1/NR2C/NR3A recombinant receptors in HEK cells and compared their currents with those of NMDA-evoked currents in rat cerebellar oligodendrocytes. NR1/NR2C/3A receptors were less blocked by 2 mM Mg(2+) than were NR1/NR2C receptors (the remaining current was 30% and 18%, respectively, of that seen without added Mg(2+)) and showed less channel noise, suggesting a smaller single channel conductance. NMDA-evoked currents in oligodendrocytes showed a Mg(2+) block (to 32%) similar to that observed for NR1/NR2C/NR3A and significantly different from that for NR1/NR2C receptors. Co-immunoprecipitation revealed interactions between NR1, NR2C and NR3A subunits in a purified myelin preparation from rat brain. These data are consistent with NMDA-evoked currents in oligodendrocytes reflecting the activation of receptors containing NR1, NR2C and NR3A subunits.

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Crossref · 10.1113/jphysiol.2010.195503

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Authors
Burzomato, V., Frugier, G., Pérez-Otaño, I., Kittler, J. T., & Attwell, D.
Affiliations
University College London (GB)
Venue
The Journal of Physiology
Publisher
Wiley
Published
2010-09-15
Volume
588
Issue
18
Pages
3403-3414
ISSN
0022-3751 (ISSN-L)
OpenAlex
W1503609844
Cited by
78
References
36
Citations by year
2026: 3 · 2025: 6 · 2024: 3 · 2023: 8 · 2022: 3 · 2021: 5 · 2020: 4 · 2019: 5 · 2018: 3 · 2017: 4 · 2016: 6 · 2015: 2 · 2014: 2 · 2013: 12 · 2012: 8
FWCI
3.11
Type
journal article
Language
en
Open access
Locations
  • The Journal of Physiology (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • UCL Discovery (University College London) (submittedVersion)
Funders
Wellcome Trust
Topics
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Biochemistry › Amino Acid Enzymes and Metabolism
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Ion channel regulation and function
Keywords
NMDA receptor, oligodendrocytes, receptor subunit composition, NR1 subunit, Mg2+ block, myelin damage, ischemia, channel noise, single-channel conductance, subunit interactions, myelin
MeSH terms
Animals, Cerebellum, Evoked Potentials, Gene Expression Regulation, Humans, Magnesium, Oligodendroglia, Receptors, N-Methyl-D-Aspartate, Protein Isoforms, Protein Subunits, Rats, Electrophysiological Phenomena, HEK293 Cells

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