The promoter of the human monoamine oxidase A gene.

Monoamine oxidase (MAO) A (EC 1.4.3.4) oxidizes norepinephrine and serotonin and is expressed in a cell type-specific manner. Evidence that MAO A deficient males in a large Dutch kindred suffer from mild mental retardation and occasional episodes of impulsive-aggressive behavior makes it important to understand how the human MAO A promoter is regulated. Workers in multiple laboratories have isolated and characterized protein-coding sequences of the human MAO A gene and the DNA region where mRNA synthesis is initiated. After summarizing our published findings concerning where transcription of the human MAO A gene is initiated, I summarize representative results of transient expression assays aimed at assessing whether some potential gene regulatory agents affect the expression of luciferase from MAO A promoter reporter constructs when transfected into a mouse L cell line which expresses MAO A. These studies revealed no specific regulatory effects of serum, dexamethasone or a stable cyclic-AMP analogue on the human MAO A promoter introduced.