This study was conducted to detect a possible association of a T941G single nucleotide polymorphism (SNP) in the monoamine oxidase A (MAOA) gene with generalized anxiety disorder (GAD), panic disorder (PD), or major depression (MD).
The present study fails to demonstrate that the genetic polymorphisms of MAOA-VNTR and TPH-A218C affect the antidepressant effect of fluvoxamine in Japanese patients with major depressive disorder.
Thus, our data suggest that an excess of high-activity MAO-A gene promoter alleles resulting in an elevated MAO-A activity is a risk factor for major depressive disorder in females.Am.J. Med.Genet.(Neuropsychiatr.Genet.)96:801-803, 2000.
There was no significant genotypic or allelic association, suggesting that the functional VNTR polymorphism in the MAOA gene is unlikely to play a major role in the pathogenesis of bipolar disorder or unipolar depression.
We investigated the polymorphisms of the MAO-A gene, which may be related to enzyme activity (T/941/G, A/1609/G), with amino-acid change (A/1609/G), in Japanese patients with bipolar disorder patients (n = 132), unipolar major depression (n = 43), or schizophrenia (n = 95), and controls (n = 169).