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Related Concept Videos

Seizures: Classification01:13

Seizures: Classification

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Epilepsy is primarily characterized by unpredictable seizures, either provoked by an identifiable factor, such as injury or illness, or unprovoked, occurring spontaneously without apparent cause.
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Related Experiment Video

Updated: Feb 14, 2026

Adaptation of Microelectrode Array Technology for the Study of Anesthesia-induced Neurotoxicity in the Intact Piglet Brain
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In Vitro Screening for Seizure Liability Using Microelectrode Array Technology.

Jenifer A Bradley1, Harry H Luithardt1, Monica R Metea1

  • 1Cyprotex US, LLC, An Evotec Company, Watertown, Massachusetts.

Toxicological Sciences : an Official Journal of the Society of Toxicology
|February 13, 2018
PubMed
Summary
This summary is machine-generated.

A new microelectrode array assay using rat neurons reliably screens for drug-induced seizure liabilities early in drug discovery. This method identifies neurophysiological disruptions, de-risking compounds before costly preclinical studies.

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Area of Science:

  • Neuroscience
  • Drug Discovery
  • Toxicology

Background:

  • Drug-induced seizures cause significant attrition in drug discovery.
  • Existing cytotoxicity assays fail to predict electrophysiological liabilities.
  • Early identification of neurotoxic effects is crucial for safe drug development.

Purpose of the Study:

  • To develop a high-throughput, reliable in vitro assay for screening seizure liabilities.
  • To identify compounds causing neurophysiological disruptions using rat cortical neurons.
  • To de-risk drug candidates earlier in the development process.

Main Methods:

  • Utilized rat cortical neurons on multiwell microelectrode array plates.
  • Measured 12 electrophysiological parameters (spike train descriptors) after compound application.
  • Tested 20 diverse chemicals, including known seizurogenic and control compounds.

Main Results:

  • The assay correctly identified 16 of 17 seizurogenic/neurotoxic compounds.
  • Distinct response patterns differentiated compounds based on target and seizure liability.
  • Negative and vehicle controls showed no effect on neural activity.

Conclusions:

  • The microelectrode array platform with rat cortical neurons is effective for high-throughput seizure liability screening.
  • This method reliably identifies neurophysiological disruptions early in drug development.
  • The assay enables early de-risking of drug candidates.