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Genes differentially expressed in the kindled mouse brain.

D Liang1, T N Seyfried

  • 1Department of Biology, Boston College, 140 Commonwealth Avenue, Chestnut Hill, MA 02467, USA.

Brain Research. Molecular Brain Research
|December 4, 2001
PubMed
Summary

Kindling rapidly alters gene expression in the mouse brain, revealing novel genes and changes in known ones. These molecular shifts in the hippocampus and forebrain may drive neuroplasticity and epilepsy models.

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Area of Science:

  • Neuroscience
  • Molecular Biology
  • Genetics

Background:

  • Kindling is a model for studying epilepsy and neuroplasticity, involving long-term changes in brain excitability.
  • Gene expression changes are crucial for understanding these neurological alterations.

Purpose of the Study:

  • To identify differentially expressed genes in the mouse brain following kindling using a differential display method.
  • To characterize the temporal and spatial patterns of these gene expression changes.

Main Methods:

  • Reverse transcription-polymerase chain reaction (RT-PCR) differential display (DD) was used to screen for gene expression changes in the hippocampus of kindled mice.
  • Northern blot analysis and sequence analysis were performed to validate and identify differentially expressed genes.

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  • Expression patterns of selected genes were analyzed across different brain regions (hippocampus, forebrain, brainstem, cerebellum) at various time points post-kindling.

    • Main Results:

    • Approximately 30,000 gene bands were screened, with 50 showing differential expression.
    • Northern blot confirmed 26 differentially expressed genes, including 12 novel genes termed 'King' genes.
    • Differential expression was primarily observed in the hippocampus and forebrain, not the brainstem or cerebellum.
    • Regulator of G-protein signaling 4 (RGS4) exhibited prolonged expression changes.

    Conclusions:

    • Rapid kindling induces significant spatial and temporal changes in gene expression within the mouse brain.
    • These identified genes, particularly novel ones and RGS4, may play a role in kindling-associated neuroplasticity and epilepsy.
    • The study provides insights into the molecular mechanisms underlying brain excitability changes during kindling.