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  • Title: Platelet monoamine oxidase activity in schizophrenia: relationship to family history of the illness and neuroleptic treatment.
    Author: Maj M, Ariano MG, Pirozzi R, Salvati A, Kemali D.
    Journal: J Psychiatr Res; 1984; 18(2):131-7. PubMed ID: 6747911.
    Abstract:
    Platelet monoamine oxidase (MAO) activity was determined in a large population of drug-free and haloperidol-treated schizophrenic patients and healthy controls and, in a second study, in a sample of schizophrenics after a wash-out period and at different times during treatment with haloperidol. Enzyme activity was significantly decreased in both acute and chronic haloperidol-treated schizophrenics, but not in drug-free schizophrenics, compared with normal controls. No significant difference was observed between drug-free schizophrenics with a family history of the illness and those without such history, and between healthy relatives of schizophrenic patients and normal controls without a family history of schizophrenia. MAO activity was significantly reduced after 14 and 21 days of haloperidol treatment, and such reduction did not correlate with response to treatment. These data strongly support the idea that neuroleptic intake may, at least in part, explain low MAO values repeatedly reported in schizophrenics.
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