GAD-immunoreactive neurons are preserved in the hippocampus of rats with spontaneous recurrent seizures

Braz J Med Biol Res. 1990;23(6-7):555-8.

Abstract

In the present study glutamate decarboxylase immunoreactivity (GAD-IR) was used to quantify GABAergic neurons in the hippocampus of rats exhibiting spontaneous recurrent seizures following pilocarpine-induced status epilepticus. Histological examination demonstrated marked neuronal damage to hippocampal neurons. However, in the same region, GAD-IR neurons were preserved. The present data demonstrate a selective resistance of GABAergic neurons to status epilepticus-induced neuronal damage, suggesting that loss of hippocampal GABAergic neurons does not underlie the recurrence of seizures in these animals.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Epilepsies, Partial / pathology
  • Glutamate Decarboxylase / analysis*
  • Hippocampus / pathology*
  • Male
  • Neurons / pathology*
  • Pilocarpine / pharmacology*
  • Rats
  • Rats, Inbred Strains
  • Recurrence
  • Seizures / etiology*
  • Status Epilepticus / chemically induced
  • Status Epilepticus / pathology*
  • gamma-Aminobutyric Acid / physiology*

Substances

  • Pilocarpine
  • gamma-Aminobutyric Acid
  • Glutamate Decarboxylase