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The Significance of Dopamine for the Mode of Action of Neuroleptics and the Pathogenesis of Schizophrenia

Published online by Cambridge University Press:  29 January 2018

H. M. van Praag*
Affiliation:
Department of Biological Psychiatry, Psychiatric University Clinic, State University Groningen, Groningen, The Netherlands

Summary

Animal experiments have demonstrated the likelihood that all known neuroleptics inhibit transmission in central CA-ergic systems, regardless of their chemical structure and via different mechanisms. For clinical psychiatry this fact prompts a number of questions: (1) is this phenomenon also to be found in human individuals; (2) if so, is it of importance for the clinical (side) effects of neuroleptics; (3) do patients with (schizophrenic) psychoses show signs of central CA-ergic hyperactivity ? This article presents a survey of clinical research focused on these questions which, for the sake of brevity, is confined to DA metabolism. The available data indicate the plausibility of a correlation between inhibition of DA-ergic transmission on the one hand, and on the other hand the therapeutic effects of neuroleptics and the occurrence of hypokinetic-rigid symptoms. The hypothesis that DA-ergic hyperactivity is an important pathogenetic mechanism in schizophrenic psychoses can be based only on indirect arguments; direct studies of the DA metabolism have so far failed to reveal supporting evidence. The possible causes of this failure are discussed.

Type
Research Article
Copyright
Copyright © Royal College of Psychiatrists, 1977 

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