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A Step-by-Step Protocol for Optogenetic Kindling.

Elvis Cela1,2, P Jesper Sjöström1

  • 1Brain Repair and Integrative Neuroscience Program, Centre for Research in Neuroscience, Department of Medicine, Department of Neurology and Neurosurgery, Montreal General Hospital, The Research Institute of the McGill University Health Centre, Montreal, QC, Canada.

Frontiers in Neural Circuits
|March 3, 2020
PubMed
Summary

Optogenetics enables precise control of neural activity for epilepsy research. Optokindling uses light to induce seizures in mice, offering a cleaner model than electrical kindling by avoiding tissue damage and inflammation.

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Area of Science:

  • Neuroscience
  • Epilepsy Research
  • Optogenetics

Background:

  • Electrical kindling is a common animal model for studying epilepsy.
  • Electrical stimulation lacks specificity and can cause tissue damage and inflammation.
  • Optogenetics offers precise control over neuronal activity without physical injury.

Purpose of the Study:

  • To develop and describe a protocol for optogenetic kindling (optokindling).
  • To establish a refined animal model for epilepsy research.
  • To investigate circuit changes underlying epilepsy with minimal confounding factors.

Main Methods:

  • Utilized optogenetics with Channelrhodopsin-2 (ChR2) expression in neurons.
  • Applied repeated light stimulation to induce seizures in healthy mice.
Keywords:
Channelrhodopsinanimal modelepilepsykindlingoptogeneticsprotocolseizure

Related Experiment Videos

  • Employed chronic EEG and video monitoring to track neural activity and seizure severity.

    • Main Results:

    • Successfully elicited seizures in mice through optokindling.
    • Demonstrated optokindling as a viable method for epilepsy modeling.
    • Provided a protocol for researchers to replicate the technique.

    Conclusions:

    • Optokindling offers a more precise and less invasive method for epilepsy research compared to electrical kindling.
    • This technique minimizes confounding factors like brain damage and inflammation.
    • Optokindling facilitates the elucidation of circuit-level changes in epilepsy.