Spatiotemporal Induction of Immediate Early Genes in the Rat Brain after Limbic Seizures: Effects of NMDA Receptor Antagonist MK‐801

Spatiotemporal Induction of Immediate Early Genes in the Rat Brain after Limbic Seizures: Effects... Fos, jun and krox belong to multigene families coding for transcription factors. These cellular immediate early genes (IEGs) are thought to be involved in coupling neuronal excitation to changes of target gene expression. Immunocytochemistry with specific antisera was used to assess regional levels of six IEG‐encoded proteins (c‐Fos, Fos B, Krox‐24, c‐Jun, Jun B, Jun D) in the rat forebrain after kainic acid‐induced limbic seizures. The results demonstrate a complex spatial pattern of IEG induction and/or suppression in limbic and non‐limbic structures. The sequence of induction within hippocampal subpopulations was identical for all IEGs investigated, following the order dentate gyrus, CA1 and CA3, and irrespective of different temporal profiles for individual transcription factors. Since Fos and Jun proteins act via homo‐ and heterodimer complexes at specific DNA sites, our data imply that the postictal combinatorial changes of these dimers allow a sequential and differential regulation of target gene expression in specific forebrain regions. Pretreatment with the non‐competitive NMDA receptor antagonist MK‐801 did not affect kainate‐induced expression of IEGs in the limbic system, indicating that IEG induction in these regions is mediated by high‐affinity kainate and AMPA receptors rather than NMDA receptors. In contrast, MK‐801 abolished IEG induction in the somatosensory cortex and striatum, suggesting that IEG expression in non‐limbic neurons occurs transsynaptically and is mediated by NMDA receptors. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png European Journal of Neuroscience Wiley

Spatiotemporal Induction of Immediate Early Genes in the Rat Brain after Limbic Seizures: Effects of NMDA Receptor Antagonist MK‐801

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Abstract

Fos, jun and krox belong to multigene families coding for transcription factors. These cellular immediate early genes (IEGs) are thought to be involved in coupling neuronal excitation to changes of target gene expression. Immunocytochemistry with specific antisera was used to assess regional levels of six IEG‐encoded proteins (c‐Fos, Fos B, Krox‐24, c‐Jun, Jun B, Jun D) in the rat forebrain after kainic acid‐induced limbic seizures. The results demonstrate a complex spatial pattern of IEG induction and/or suppression in limbic and non‐limbic structures. The sequence of induction within hippocampal subpopulations was identical for all IEGs investigated, following the order dentate gyrus, CA1 and CA3, and irrespective of different temporal profiles for individual transcription factors. Since Fos and Jun proteins act via homo‐ and heterodimer complexes at specific DNA sites, our data imply that the postictal combinatorial changes of these dimers allow a sequential and differential regulation of target gene expression in specific forebrain regions. Pretreatment with the non‐competitive NMDA receptor antagonist MK‐801 did not affect kainate‐induced expression of IEGs in the limbic system, indicating that IEG induction in these regions is mediated by high‐affinity kainate and AMPA receptors rather than NMDA receptors. In contrast, MK‐801 abolished IEG induction in the somatosensory cortex and striatum, suggesting that IEG expression in non‐limbic neurons occurs transsynaptically and is mediated by NMDA receptors.

Journal

European Journal of NeuroscienceWiley

Published: Jul 1, 1993

References

  • Enhanced rate of expression and biosynthesis of neuropeptide Y after kainic acid‐induced seizures
    Bellmann, Bellmann; Widmann, Widmann; Olenik, Olenik; Meyer, Meyer; Maas, Maas; Marksteiner, Marksteiner; Sperk, Sperk
  • Alterations of hippocampal acetylcholinesterase in human temporal lobe epilepsy
    Green, Green; Blume, Blume; Kupferschmid, Kupferschmid; Mesulam, Mesulam
  • The epidemiology of epilepsy in Rochester, Minnesota, 1935–1967
    Hauser, Hauser; Kurland, Kurland
  • Primary response genes induced by growth factors and tumor promoters
    Herschman, Herschman
  • Altered excitatory and inhibitory amino acid binding in hippocampus of patients with temporal lobe epilepsy
    McDonald, McDonald; Garofalo, Garofalo; Hood, Hood
  • Stimulus–transcription coupling in the nervous system: involvement of the inducible proto‐oncogenes fos and jun
    Morgan, Morgan; Curran, Curran
  • A selective loss of somatostatin in the hippocampus of patients with temporal lobe epilepsy
    Robbins, Robbins; Brines, Brines; Kim, Kim; Adrian, Adrian; Lanerolle, Lanerolle; Welsh, Welsh; Spencer, Spencer
  • Glutamate receptor agonists increase the expression of fos, fra and AP‐1 DNA binding activity in the mammalian brain
    Sonnenberg, Sonnenberg; Mitchelmore, Mitchelmore; Macgregor‐Leon, Macgregor‐Leon; Hempstead, Hempstead; Morgan, Morgan; Curran, Curran

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