ArticleeLife2023
Enhanced functional detection of synaptic calcium-permeable AMPA receptors using intracellular NASPM.
Article in eLife, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 10 papers.
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Who cites it
10 citing papers in PubMed, 18 citations in OpenAlex.
- The Wnt5a-PKCδ-GluA1 axis controls synapse-specific plasticity in HIV-1 gp120-induced pain pathogenesis.Brain : a journal of neurology · 2026Article
- Calcium-permeable AMPA receptors contribute to the accelerated development of enhanced motivation for cocaine in female rats.Psychopharmacology · 2026Article
- Assembly and gating mechanism of native AMPA receptors from the cerebellum.Cell research · 2026Article
- AMPA Receptors in NG2 Glia Differently Affect Signal Transduction in the Hippocampus and Cerebellum.Glia · 2026Article
- BDNF Signaling in Glutamatergic Neurons During Long-Term Potentiation (LTP): A Spatio-Temporal Exploration of Events.Molecular neurobiology · 2025Review
- Shank3 establishes AMPA receptor subunit composition at cerebellar mossy fiber-granule cell synapses and is associated with altered regional microglial morphology.Neurobiology of disease · 2025Article
- Gating and noelin clustering of native CaNature · 2025Article
- Ethanol self-administration targets GluA2-containing AMPA receptor expression and synaptic activity in the nucleus accumbens in a manner that drives the positive reinforcing properties of the drug.Psychopharmacology · 2025Article
- Identification of Neurons Containing Calcium-Permeable AMPA and Kainate Receptors Using CaBio-protocol · 2025Article
- Recruitment of cortical silent responses by forskolin in the anterior cingulate cortex of adult mice.Molecular painArticle
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Authors and funding
6 authors at 1 institution in 1 country.
Funding
Abstract
Calcium-permeable AMPA-type glutamate receptors (CP-AMPARs) contribute to many forms of synaptic plasticity and pathology. They can be distinguished from GluA2-containing calcium-impermeable AMPARs by the inward rectification of their currents, which reflects voltage-dependent channel block by intracellular spermine. However, the efficacy of this weakly permeant blocker is differentially altered by the presence of AMPAR auxiliary subunits - including transmembrane AMPAR regulatory proteins, cornichons, and GSG1L - which are widely expressed in neurons and glia. This complicates the interpretation of rectification as a measure of CP-AMPAR expression. Here, we show that the inclusion of the spider toxin analog 1-naphthylacetyl spermine (NASPM) in the intracellular solution results in a complete block of GluA1-mediated outward currents irrespective of the type of associated auxiliary subunit. In neurons from GluA2-knockout mice expressing only CP-AMPARs, intracellular NASPM, unlike spermine, completely blocks outward synaptic currents. Thus, our results identify a functional measure of CP-AMPARs, that is unaffected by their auxiliary subunit content.
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