Thrombocyte monoamine oxidase activity and behavior deviances in adolescence

Area of Science:

• Neuroscience
• Psychiatry
• Genetics

Background:

• Monoamine oxidase (MAO) plays a crucial role in neurotransmitter regulation.
• Altered MAO activity has been implicated in various psychiatric disorders.
• Platelet MAO activity is a commonly studied peripheral marker for central MAO function.

Purpose of the Study:

• To investigate the prevalence of low thrombocyte monoamine oxidase (MAO) activity in adolescents with behavioral and attention disorders.
• To explore potential gender differences in the association between MAO activity and externalizing behaviors.

Main Methods:

• Studied 100 consecutive adolescent psychiatric patients.
• Categorized patients into groups based on DSM-III-R diagnoses (behavioral disorders, attention deficit, substance abuse vs. other diagnoses).
• Assessed thrombocyte MAO activity and compared frequencies of low activity to control groups, analyzing by gender.

Main Results:

• No significant difference in low platelet MAO activity was found between male patient groups and controls.
• A significantly higher percentage of girls with behavioral disorders (group I) exhibited low platelet MAO activity compared to controls (p=0.015).
• Girls in the other diagnostic group (group II) did not differ from controls in MAO activity.

Conclusions:

• The hypothesis of lower thrombocyte MAO activity in adolescents with externalizing symptoms was supported only in girls.
• Gender-specific differences in psychiatric disturbance or personality may explain the observed gender disparity in MAO activity.
• Results suggest a potential link between low MAO activity and externalizing behaviors predominantly in adolescent females.