Abstract
Studies of amino acid release were carried out using frozen sections from brains of schizophrenics and controls. Synaptosomes were prepared via differential centrifugation in Ficoll allowing the veratridine-induced release of aspartate, glutamate, glycine, and GABA to be measured. The release of glutamate and γ-aminobutyric acid (GABA) was reduced in the synaptosomes from schizophrenics. This decrease could be reversed partially by pre-incubation of the synaptosomes with haloperidol. Additionally, the activity of glutamate decarboxylase was decreased and partially restored by haloperidol pre-incubation. These data are consistent with the hypothesis of a glutamatergic/GABAergic deficit in schizophrenia.
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