Abstract

The dorsal lateral geniculate nucleus of tree shrews is very susceptible to the neurotoxic effects of kainic acid. In addition to neuronal loss, there is a profound loss of retinal terminals that is manifested through a disruption of anterograde transport of WGA/HRP from the retina to the kainic acid-lesioned area of the geniculate nucleus. The actions of kainic acid upon both the presynaptic terminals and geniculate neurons may be mediated by a glutamatergic pathway and questions the hypothesis that kainic acid is solely neuron-specific in its toxic action.

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