Abstract
Monoamine oxidase A (MAO-A) is an enzyme involved in the metabolism of monoamine neurotransmitters such as dopamine, serotonin, and noradrenaline in the brain. Previous studies have demonstrated a significant association between MAO-A gene polymorphism and personality traits in males. The purpose of the present study was to examine this association in females. The subjects were 219 healthy Japanese females. We genotyped a variable number of tandem repeats located upstream of the MAO-A gene. Personality traits were assessed using the Temperament and Character Inventory (TCI). There was no association between any personality trait and MAO-A genotype. The present results do not support the hypothesis that MAO-A gene polymorphism is related to certain personality traits in females.
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