PTEN Is Required for The Anti-Epileptic Effects of AMPA Receptor Antagonists in Chronic Epileptic Rats

α-Amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid receptor (AMPAR) is one of the ligand-gated ion channels for glutamate, which is an important player in the generation and spread of seizures. The efficacy of AMPAR functionality is regulated by the trafficking, synaptic targeting, and phosphoryla...

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Veröffentlicht in:International journal of molecular sciences 2020-08, Vol.21 (16), p.5643
Hauptverfasser: Kim, Ji-Eun, Park, Hana, Lee, Ji-Eun, Kim, Tae-Hyun, Kang, Tae-Cheon
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container_title International journal of molecular sciences
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creator Kim, Ji-Eun
Park, Hana
Lee, Ji-Eun
Kim, Tae-Hyun
Kang, Tae-Cheon
description α-Amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid receptor (AMPAR) is one of the ligand-gated ion channels for glutamate, which is an important player in the generation and spread of seizures. The efficacy of AMPAR functionality is regulated by the trafficking, synaptic targeting, and phosphorylation. Paradoxically, AMPAR expression and its phosphorylation level are decreased in the epileptic hippocampus. Therefore, the roles of AMPAR in seizure onset and neuronal hyperexcitability in ictogenesis remain to be elucidated. In the present study, we found that AMPAR antagonists (perampanel and GYKI 52466) decreased glutamate ionotropic receptor AMPA type subunit 1 (GRIA1) surface expression in the epileptic rat hippocampus. They also upregulated phosphatase and tensin homolog deleted on chromosome 10 (PTEN) expression and restored to basal levels the upregulated phosphoinositide 3-kinase (PI3K)/AKT1 phosphorylations. Dipotassium bisperoxovanadium(pic) dihydrate (BpV(pic), a PTEN inhibitor) co-treatment abolished the anti-epileptic effects of perampanel and GYKI 52466. Therefore, our findings suggest that PTEN may be required for the anti-epileptic effects of AMPAR antagonists.
doi_str_mv 10.3390/ijms21165643
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The efficacy of AMPAR functionality is regulated by the trafficking, synaptic targeting, and phosphorylation. Paradoxically, AMPAR expression and its phosphorylation level are decreased in the epileptic hippocampus. Therefore, the roles of AMPAR in seizure onset and neuronal hyperexcitability in ictogenesis remain to be elucidated. In the present study, we found that AMPAR antagonists (perampanel and GYKI 52466) decreased glutamate ionotropic receptor AMPA type subunit 1 (GRIA1) surface expression in the epileptic rat hippocampus. They also upregulated phosphatase and tensin homolog deleted on chromosome 10 (PTEN) expression and restored to basal levels the upregulated phosphoinositide 3-kinase (PI3K)/AKT1 phosphorylations. Dipotassium bisperoxovanadium(pic) dihydrate (BpV(pic), a PTEN inhibitor) co-treatment abolished the anti-epileptic effects of perampanel and GYKI 52466. Therefore, our findings suggest that PTEN may be required for the anti-epileptic effects of AMPAR antagonists.</abstract><cop>Switzerland</cop><pub>MDPI AG</pub><pmid>32781725</pmid><doi>10.3390/ijms21165643</doi><oa>free_for_read</oa></addata></record>
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source MDPI - Multidisciplinary Digital Publishing Institute; MEDLINE; Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals; PubMed Central
subjects 1-Phosphatidylinositol 3-kinase
AKT1 protein
Animals
Benzodiazepines - pharmacology
Benzodiazepines - therapeutic use
Bisperoxovanadium
Chromosome 10
Chromosomes
Chronic Disease
Convulsions & seizures
Down-Regulation - drug effects
Epilepsy
Epilepsy - drug therapy
Epilepsy - metabolism
Hippocampus
Hippocampus - metabolism
Homology
Ion channels
Ion channels (ligand-gated)
Kinases
Male
Models, Biological
NF-kappa B - metabolism
Phosphatidylinositol 3-Kinases - metabolism
Phosphorylation
Phosphorylation - drug effects
Proto-Oncogene Proteins c-akt - metabolism
PTEN Phosphohydrolase - antagonists & inhibitors
PTEN Phosphohydrolase - metabolism
PTEN protein
Pyridones - pharmacology
Pyridones - therapeutic use
Rats, Sprague-Dawley
Receptors, AMPA - antagonists & inhibitors
Recording sessions
Rodents
Seizures
Tensin
Up-Regulation - drug effects
α-Amino-3-hydroxy-5-methyl-4-isoxazole propionic acid
α-Amino-3-hydroxy-5-methyl-4-isoxazole propionic acid receptors
title PTEN Is Required for The Anti-Epileptic Effects of AMPA Receptor Antagonists in Chronic Epileptic Rats
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