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Related Experiment Videos

Chromogranins in temporal lobe epilepsy.

S Kandlhofer1, B Hoertnagl, T Czech

  • 1Department of Pharmacology, University of Innsbruck, Austria. susanne.pirker@univie.ac.at

Epilepsia
|September 22, 2000
PubMed
Summary

Chromogranins A and B and secretoneurin are markers for hippocampal neurons. Epilepsy reorganizes mossy fibers, altering the distribution of these proteins in the hippocampus.

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Area of Science:

  • Neuroscience
  • Cell Biology
  • Epilepsy Research

Background:

  • Chromogranins are neuropeptide precursors stored in large dense core vesicles.
  • Physiological functions are postulated for peptides derived from chromogranins.

Purpose of the Study:

  • Investigate the distribution of chromogranins A and B and secretoneurin in control and epileptic hippocampi.
  • Determine if these proteins can serve as markers for neuronal populations and epilepsy-induced changes.

Main Methods:

  • Immunoreactivity (IR) for chromogranins A, B, and secretoneurin was examined.
  • Specimens included human temporal lobe epilepsy patients, postmortem controls, and rats with kainate-induced seizures.

Main Results:

Related Experiment Videos

  • Chromogranin A, B, and secretoneurin IR were found in hippocampal mossy fibers in controls and humans.
  • Epilepsy led to prominent staining in the inner molecular layer, indicating reorganization of mossy fiber terminals.
  • Chromogranin B was also found in granule cells, and chromogranin A in granule and CA2 pyramidal cells in humans.

    • Conclusions:

    • Chromogranins A and B and secretoneurin are reliable markers for hippocampal neurons.
    • These proteins effectively delineate epilepsy-induced reorganization of hippocampal mossy fibers.