Serum dopamine-beta-hydroxylase activity in schizophrenia

Area of Science:

• Neuroscience
• Biochemistry
• Psychiatry

Background:

• Previous research suggested decreased serum dopamine-beta-hydroxylase (DBH) activity in schizophrenia.
• This study aimed to re-evaluate the relationship between serum DBH activity and schizophrenia.

Purpose of the Study:

• To investigate serum DBH activity in a cohort of schizophrenic patients and normal controls.
• To determine if decreased DBH activity is a consistent finding in schizophrenia.

Main Methods:

• Serum DBH activity was measured in 90 normal controls and 78 schizophrenic patients.
• Statistical analysis was performed to compare DBH activity between groups.
• Incidence of DBH activity below the normal median was analyzed in subgroups.

Main Results:

• No significant difference in overall serum DBH activity was found between the entire schizophrenic group and normal controls.
• Chronic paranoid schizophrenics exhibited a significantly lower incidence of serum DBH activity below the median of normal controls.

Conclusions:

• The initial report of significantly decreased serum DBH activity in schizophrenics as a whole group was not replicated.
• A reduced incidence of low serum DBH activity may be characteristic of chronic paranoid schizophrenia.