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Preparing Undercut Model of Posttraumatic Epileptogenesis in Rodents
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GSK3β activity alleviates epileptogenesis and limits GluA1 phosphorylation.

Malgorzata Urbanska1, Paulina Kazmierska-Grebowska2, Tomasz Kowalczyk2

  • 1Laboratory of Molecular and Cellular Neurobiology, International Institute of Molecular and Cell Biology, Warsaw 02-109, Poland; Department of Neurology and Epileptology, Children's Memorial Health Institute, Warsaw 04-730, Poland.

Ebiomedicine
|December 4, 2018
PubMed
Summary

Increased glycogen synthase kinase-3β (GSK3β) activity protects against epilepsy by modulating ion channels and synaptic receptors. This finding suggests GSK3β as a potential therapeutic target for epilepsy treatment.

Keywords:
AMPA receptorsEpilepsyGSK3GluA1 phosphorylationGlycogen synthase kinases-3

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Area of Science:

  • Neuroscience
  • Molecular Biology
  • Epilepsy Research

Background:

  • Glycogen synthase kinase-3β (GSK3β) is crucial for cellular balance in neurons.
  • Its specific role in epilepsy, particularly in neuronal transmission and plasticity, requires further investigation.

Purpose of the Study:

  • To investigate the role of GSK3β in regulating neuronal transmission and epileptogenesis.
  • To determine if modulating GSK3β activity impacts epilepsy progression.

Main Methods:

  • Utilized biochemical and electrophysiological techniques in GSK3β[S9A] mice with genetically increased GSK3β activity.
  • Assessed epileptogenesis using kainic acid, field potential recordings, and in vivo video electroencephalography.
  • Analyzed ion channel expression and receptor phosphorylation in mouse and human epilepsy patient samples.

Main Results:

  • Elevated GSK3β activity reduced the severity of kainic acid-induced epileptogenesis.
  • Increased GSK3β activity enhanced hyperpolarization-activated cyclic nucleotide-gated (HCN) channel 4 expression.
  • Decreased phosphorylation of α-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid (AMPA) receptor subunit GluA1 at Serine 831 was observed.

Conclusions:

  • GSK3β activity protects neuronal networks from hyperexcitation during epileptogenic events.
  • The anti-epileptogenic effects of GSK3β involve regulating HCN4 levels and synaptic AMPA receptors.
  • Findings suggest GSK3β as a potential therapeutic target for epilepsy.