ZFIN ID: ZDB-PUB-190826-16
Glia-neuron interactions underlie state transitions to generalized seizures
Diaz Verdugo, C., Myren-Svelstad, S., Aydin, E., Van Hoeymissen, E., Deneubourg, C., Vanderhaeghe, S., Vancraeynest, J., Pelgrims, R., Cosacak, M.I., Muto, A., Kizil, C., Kawakami, K., Jurisch-Yaksi, N., Yaksi, E.
Date: 2019
Source: Nature communications   10: 3830 (Journal)
Registered Authors: Cosacak, Mehmet Ilyas, Jurisch-Yaksi, Nathalie, Kawakami, Koichi, Kizil, Caghan, Muto, Akira, Pelgrims, Robbrecht, Yaksi, Emre
Keywords: none
MeSH Terms:
  • Animals
  • Animals, Genetically Modified
  • Brain/cytology
  • Brain/diagnostic imaging
  • Brain/physiopathology*
  • Cell Communication*
  • Cortical Excitability/physiology*
  • Disease Models, Animal
  • Epilepsy/physiopathology*
  • Gap Junctions/physiology
  • Glutamic Acid/metabolism
  • Humans
  • Microscopy, Confocal
  • Nerve Net/cytology
  • Nerve Net/physiopathology
  • Neuroglia/physiology
  • Neurons/physiology
  • Optical Imaging
  • Optogenetics
  • Patch-Clamp Techniques
  • Seizures/physiopathology*
  • Zebrafish
PubMed: 31444362 Full text @ Nat. Commun.
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ABSTRACT
Brain activity and connectivity alter drastically during epileptic seizures. The brain networks shift from a balanced resting state to a hyperactive and hypersynchronous state. It is, however, less clear which mechanisms underlie the state transitions. By studying neural and glial activity in zebrafish models of epileptic seizures, we observe striking differences between these networks. During the preictal period, neurons display a small increase in synchronous activity only locally, while the gap-junction-coupled glial network was highly active and strongly synchronized across large distances. The transition from a preictal state to a generalized seizure leads to an abrupt increase in neural activity and connectivity, which is accompanied by a strong alteration in glia-neuron interactions and a massive increase in extracellular glutamate. Optogenetic activation of glia excites nearby neurons through the action of glutamate and gap junctions, emphasizing a potential role for glia-glia and glia-neuron connections in the generation of epileptic seizures.
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