Specific pathogenic mutations in the M3 domain of the GluN1 subunit regulate the surface delivery and pharmacological sensitivity of NMDA receptors

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378041%3A_____%2F21%3A00541886" target="_blank" >RIV/68378041:_____/21:00541886 - isvavai.cz</a>

Alternative codes found

RIV/67985823:_____/21:00542632 RIV/00216208:11310/21:10431492

Result on the web

<a href="https://doi.org/10.1016/j.neuropharm.2021.108528" target="_blank" >https://doi.org/10.1016/j.neuropharm.2021.108528</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.neuropharm.2021.108528" target="_blank" >10.1016/j.neuropharm.2021.108528</a>

Result language

angličtina

Original language name

Specific pathogenic mutations in the M3 domain of the GluN1 subunit regulate the surface delivery and pharmacological sensitivity of NMDA receptors

Original language description

N-methyl-D-aspartate receptors (NMDARs) play an essential role in regulating glutamatergic neurotransmission. Recently, pathogenic missense mutations were identified in genes encoding NMDAR subunits, however, their effect on NMDAR activity is often poorly understood. Here, we examined whether three previously identified pathogenic mutations (M641I, A645S, and Y647S) in the M3 domain of the GluN1 subunit affect the receptors surface delivery, agonist sensitivity, Mg2+ block, and-or inhibition by the FDA-approved NMDAR blocker memantine. When expressed in HEK293 cells, we found reduced surface expression of GluN1-M641I-GluN2A, GluN1-Y647S-GluN2A, and GluN1-Y647S-GluN2B receptors, other mutation-bearing NMDAR combinations, including GluN1/GluN3A receptors, were expressed at normal surface levels. When expressed in rat hippocampal neurons, we consistently found reduced surface expression of the GluN1-M641I and GluN1-Y647S subunits when compared with wild-type GluN1 subunit. At the functional level, we found that GluN1-M641I/GluN2 and GluN1-A645S/GluN2 receptors expressed in HEK293 cells have wild-type EC50 values for both glutamate and glycine, in contrast, GluN1-Y647S/GluN2 receptors do not produce glutamate-induced currents. In the presence of a physiological concentration of Mg2+, we found that GluN1-M641I/GluN2 receptors have a lower memantine IC50 and slower offset kinetics, whereas GluN1-A645S/GluN2 receptors have a higher memantine IC50 and faster offset kinetics when compared to wild-type receptors. Finally, we found that memantine was the most neuroprotective in hippocampal neurons expressing GluN1-M641I subunits, followed by neurons expressing wild-type GluN1 and then GluN1-A645S subunits in an NMDA-induced excitotoxicity assay. These results indicate that specific pathogenic mutations in the M3 domain of the GluN1 subunit differentially affect the trafficking and functional properties of NMDARs

Czech name

—

Czech description

—

Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

30103 - Neurosciences (including psychophysiology)

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2021

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Neuropharmacology

ISSN

0028-3908

e-ISSN

1873-7064

Volume of the periodical

189

Issue of the periodical within the volume

may

Country of publishing house

NL - THE KINGDOM OF THE NETHERLANDS

Number of pages

17

Pages from-to

108528

UT code for WoS article

000651384400002

EID of the result in the Scopus database

2-s2.0-85103406363