Evidence map›Paper›PMID 23699525›Full record

ArticleThe Journal of neuroscience : the official journal of the Society for Neuroscience2013

Triheteromeric NMDA receptors at hippocampal synapses.

Kenneth R Tovar, Matthew J McGinley, Gary L Westbrook

Abstract read
In one paragraph

Article in The Journal of neuroscience : the official journal of the Society for Neuroscience, 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 137 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
137citing papers in PubMed, 2 pooled it
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

137 citing papers in PubMed, 2 syntheses or guidelines pooled it.

  1. Pooled it
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  10. Disruption ofThe Journal of neuroscience : the official journal of the Society for Neuroscience · 2025
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  20. Characterization of Mice Carrying a Neurodevelopmental Disease-Associated GluN2B(L825V) Variant.The Journal of neuroscience : the official journal of the Society for Neuroscience · 2024
    Article

77 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

3 authors.

Kenneth R TovarVollum Institute, Oregon Health & Science University, Portland, Oregon 97239, USA. tovark@ohsu.edu
Matthew J McGinley
Gary L Westbrook

Funding

SYNAPTIC TRANSMISSION IN THE CNSR01NS026494 · NINDS · OREGON HEALTH & SCIENCE UNIVERSITY · PI WESTBROOK, GARY L · 1993 to 2009
$3.0M
ENDOGENOUS REGULATORS OF GLUTAMATE ACTIVATED CHANNELSR37MH046613 · NIMH · OREGON HEALTH & SCIENCE UNIVERSITY · PI WESTBROOK, GARY L · 1997 to 2007
$2.1M
Synapses and Circuits in the HippocampusR01MH046613 · NIMH · OREGON HEALTH & SCIENCE UNIVERSITY · PI WESTBROOK, GARY L · 1990 to 2011
$1.7M
EXCITATORY SYNAPTIC MECHANISMS IN THE CNSR29NS026494 · NINDS · OREGON HEALTH AND SCIENCE UNIVERSITY · PI WESTBROOK, GARY L · 1988 to 1992
–
NIMH NIH HHS #MH 46613NIMH NIH HHS R01 MH046613NIMH NIH HHS R37 MH046613NINDS NIH HHS #NS 26494NINDS NIH HHS R01 NS026494
6 · The paper itself

Abstract

NMDA receptors are composed of two GluN1 (N1) and two GluN2 (N2) subunits. Constituent N2 subunits control the pharmacological and kinetic characteristics of the receptor. NMDA receptors in hippocampal or cortical neurons are often thought of as diheteromeric, meaning that they contain only one type of N2 subunit. However, triheteromeric receptors with more than one type of N2 subunit also have been reported, and the relative contribution of diheteromeric and triheteromeric NMDA receptors at synapses has been difficult to assess. Because wild-type hippocampal principal neurons express N1, N2A, and N2B, we used cultured hippocampal principal neurons from N2A and N2B knock-out mice as templates for diheteromeric synaptic receptors. However, summation of N1/N2B and N1/N2A EPSCs could not account for the deactivation kinetics of wild-type EPSCs. To make a quantitative estimate of NMDA receptor subtypes at wild-type synapses, we used the deactivation kinetics and the effects of the competitive antagonist NVP-AAM077. Our results indicate that three types of NMDA receptors contribute to wild-type EPSCs, with at least two-thirds being triheteromeric receptors. Functional isolation of synaptic triheteromeric receptors revealed deactivation kinetics and pharmacology that were distinct from either diheteromeric receptor subtype. Because of differences in open probability, synaptic triheteromeric receptors outnumbered N1/N2A receptors by 5.8 to 1 and N1/N2B receptors by 3.2 to 1. Our results suggest that triheteromeric NMDA receptors must either be preferentially assembled or preferentially localized at synapses.

Indexed as

AnimalsAnimals, NewbornBiophysical PhenomenaDose-Response Relationship, DrugElectric StimulationExcitatory Amino Acid AgentsExcitatory Postsynaptic PotentialsGlycineHippocampusMiceMice, Inbred C57BLMice, KnockoutNeuronsN-MethylaspartateOrgan Culture TechniquesPatch-Clamp TechniquesExcitatory Amino Acid AgentsGlycineN-MethylaspartateNR2B NMDA receptorReceptors, N-Methyl-D-Aspartate

Identifiers

PMID23699525
PMCPMC3755730

What OpenQuestion holds

Textmetadata
LicenceTDM
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.