AMPA reduces surface expression of NR1 through regulation of GSK3beta.

Abstract:

:Emerging evidence has suggested that alpha-amino-3-hydroxy-5-methyl-4-isoxazole propionate (AMPA) protects neurons from glutamate-induced neurotoxicity. In this study, we examined the effect of AMPA on the cell surface expression of the N-methyl-D-aspartate (NMDA) receptor, a central player in glutamate-induced neurotoxicity, using rat cortical neurons. AMPA (10 microM, 24 h) attenuated the expression of cell surface NR1, an NMDA receptor subunit, and also inhibited glutamate-induced increases in intracellular Ca2+. SB216763, an inhibitor of glycogen synthase kinase 3beta (GSK3beta), had effects similar to those of AMPA. We have earlier shown that AMPA treatment attenuated GSK3beta activity. Our data suggest that AMPA reduces the cell surface expression of NMDA receptors through the regulation of GSK3beta and, consequently, reduces the amount of intracellular Ca2+.

journal_name

Neuroreport

journal_title

Neuroreport

authors

Nishimoto T,Kihara T,Akaike A,Niidome T,Sugimoto H

doi

10.1097/WNR.0b013e3283118450

subject

Has Abstract

pub_date

2009-01-28 00:00:00

pages

161-5

issue

2

eissn

0959-4965

issn

1473-558X

pii

00001756-200901280-00012

journal_volume

20

pub_type

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