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  • Title: No association of a functional polymorphism in the dopamine D2 receptor promoter region with bipolar or unipolar affective disorders.
    Author: Furlong RA, Coleman TA, Ho L, Rubinsztein JS, Walsh C, Paykel ES, Rubinsztein DC.
    Journal: Am J Med Genet; 1998 Sep 07; 81(5):385-7. PubMed ID: 9754623.
    Abstract:
    The dopaminergic system, along with the serotonergic and noradrenergic systems, has been implicated in the etiology of mood disorders. An association study of a functional variant in the promoter region of the dopamine D2 receptor (DRD2) with bipolar affective disorder I or unipolar major affective disorders was performed. Variable expression of the DRD2 gene in vitro has been shown with this promoter polymorphism. One hundred and thirty-one unrelated bipolar patients, 128 unrelated unipolar patients, and 262 controls were used in the study. There were no significant differences in DRD2 allele or genotype frequencies between the affective disorder and control groups. These results do not support a major role for the DRD2 gene in the etiology of either bipolar or unipolar affective disorders.
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