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Central dopaminergic mechanisms in schizophrenia
Acta Psychiatrica Belgica
|September 1, 1987
Summary
Schizophrenia research found no dopamine synthesis issues. However, evidence suggests schizophrenia may involve more dopamine D2 receptors in the brain.
Area of Science:
- Neuroscience
- Psychiatry
- Neurochemistry
Background:
- The dopamine hypothesis is a leading theory for schizophrenia.
- Previous research has yielded conflicting results regarding dopamine levels in schizophrenia.
Purpose of the Study:
- To investigate the dopamine hypothesis of schizophrenia.
- To evaluate dopamine synthesis, inactivation, and receptor density in schizophrenia.
Main Methods:
- Neurochemical analysis of dopamine and its metabolites.
- Enzyme activity assays.
- In vitro and in vivo receptor binding studies.
Main Results:
- No significant differences were found in dopamine synthesis or inactivation between schizophrenic patients and controls.
- Brain concentrations of dopamine, its metabolites, and related enzyme activities were similar in both groups.
- Evidence suggests an increased number of dopamine D2 receptors in the brains of individuals with schizophrenia.
Conclusions:
- The dopamine hypothesis of schizophrenia is not supported by evidence of abnormal dopamine synthesis or inactivation.
- An increased density of dopamine D2 receptors may be implicated in the pathophysiology of schizophrenia.