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Related Experiment Videos

Genetic influences on electrical seizure threshold

T N Ferraro1, G T Golden, R Snyder

  • 1Department of Psychiatry, Center for Neurobiology and Behavior, University of Pennsylvania, Philadelphia, PA 19104-6140, USA.

Brain Research
|November 24, 1998
PubMed
Summary

Maximal electroshock threshold (MET) differs significantly between C57BL/6J (seizure-resistant) and DBA/2J (seizure-sensitive) mice. This seizure susceptibility trait is highly heritable, suggesting a strong genetic basis for further study.

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Area of Science:

  • Neuroscience
  • Genetics
  • Pharmacology

Background:

  • C57BL/6J (B6) mice are seizure-resistant, while DBA/2J (D2) mice are seizure-sensitive.
  • Previous studies identified differences based on drug responses.

Purpose of the Study:

  • To assess the maximal electroshock threshold (MET) in B6, D2, and hybrid mice.
  • To investigate the heritability of seizure susceptibility differences between B6 and D2 strains.

Main Methods:

  • Maximal electroshock threshold (MET) was measured using electroconvulsive shock (ECS).
  • Experiments involved parental strains (B6, D2) and their F1 and F2 intercross hybrids.

Main Results:

  • D2 mice exhibited a significantly lower MET than B6 mice.

Related Experiment Videos

  • A significant gender effect was observed in B6 and F2 mice, with females having lower METs.
  • METs in F1 and F2 hybrids were intermediate between parental strains.
  • Genetic influence accounted for approximately three-quarters of the total variance in MET.

    • Conclusions:

    • The substantial difference in MET between B6 and D2 mice is a highly heritable trait.
    • This trait is amenable to genetic dissection using quantitative trait locus (QTL) mapping.