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• W3066916329 endingPage "5921" @default.
• W3066916329 startingPage "5921" @default.
• W3066916329 abstract "The subthreshold, transient A-type K+ current is a vital regulator of the excitability of neurons throughout the brain. In mammalian hippocampal pyramidal neurons, this current is carried primarily by ion channels comprising Kv4.2 α-subunits. These channels occupy the somatodendritic domains of these principle excitatory neurons and thus regulate membrane voltage relevant to the input–output efficacy of these cells. Owing to their robust control of membrane excitability and ubiquitous expression in the hippocampus, their dysfunction can alter network stability in a manner that manifests in recurrent seizures. Indeed, growing evidence implicates these channels in intractable epilepsies of the temporal lobe, which underscores the importance of determining the molecular mechanisms underlying their regulation and contribution to pathologies. Here, we describe the role of p38 kinase phosphorylation of a C-terminal motif in Kv4.2 in modulating hippocampal neuronal excitability and behavioral seizure strength. Using a combination of biochemical, single-cell electrophysiology, and in vivo seizure techniques, we show that kainic acid-induced seizure induces p38-mediated phosphorylation of Thr607 in Kv4.2 in a time-dependent manner. The pharmacological and genetic disruption of this process reduces neuronal excitability and dampens seizure intensity, illuminating a cellular cascade that may be targeted for therapeutic intervention to mitigate seizure intensity and progression." @default.
• W3066916329 created "2020-08-24" @default.
• W3066916329 creator A5031987017 @default.
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• W3066916329 date "2020-08-18" @default.
• W3066916329 modified "2023-10-16" @default.
• W3066916329 title "P38 Regulates Kainic Acid-Induced Seizure and Neuronal Firing via Kv4.2 Phosphorylation" @default.
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• W3066916329 doi "https://doi.org/10.3390/ijms21165921" @default.
• W3066916329 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/7460594" @default.
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• W3066916329 hasPublicationYear "2020" @default.
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