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Related Experiment Videos

Suppressed epileptogenesis in BDNF mutant mice

M Kokaia1, P Ernfors, Z Kokaia

  • 1Department of Neurology, University Hospital, Lund, Sweden.

Experimental Neurology
|June 1, 1995
PubMed
Summary

Brain-derived neurotrophic factor (BDNF) is crucial for developing epilepsy. Suppressing BDNF levels in mice reduced seizure development, indicating its role in establishing hyperexcitability.

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Area of Science:

  • Neuroscience
  • Epilepsy Research
  • Molecular Biology

Background:

  • Kindling is an established animal model for studying epilepsy.
  • Epileptogenesis involves progressive seizure amplification following repeated stimulation.
  • Brain-derived neurotrophic factor (BDNF) synthesis increases transiently during seizures.

Purpose of the Study:

  • To investigate the role of BDNF in the development and maintenance of kindling-induced epilepsy.
  • To determine if reduced BDNF levels impact seizure progression.

Main Methods:

  • Utilized mice heterozygous for a BDNF gene deletion (BDNF mutants).
  • Compared kindling development and maintenance between BDNF mutants and wild-type mice.
  • Measured BDNF mRNA levels in cortical and hippocampal neurons post-seizure.

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  • Assessed hippocampal mossy fiber sprouting.

    • Main Results:

    • Development of kindling was significantly suppressed in BDNF mutant mice.
    • Maintenance of kindling was not affected by BDNF gene deletion.
    • BDNF mutant mice exhibited lower BDNF mRNA levels post-seizure compared to controls.
    • Increased hippocampal mossy fiber sprouting was observed in BDNF mutants.

    Conclusions:

    • BDNF plays a critical role in the establishment of hyperexcitability during epileptogenesis.
    • Reduced BDNF levels likely impair the synaptic potentiation necessary for seizure development.
    • BDNF is essential for the progressive amplification of seizure activity in the kindling model.