Abstract

Decortication, which causes degeneration of the cortico-striatal glutamateric afferents, markedly attentuates the neurotoxic action of kainic acid in the striatum. Injection of 1 μmol of L-glutamate alone in the decorticate striatum does not cause neuronal degeneration whereas the injection of 10 nmol of kainate with 1 μmol of L-glutamate partially restores kainate's neurotoxicity. The results suggest that kainate's neurotoxicity is affected by the synaptic input to vulnerable neurons and may involve a cooperative interaction with synaptically released L-glutamate.

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