The benzodiazepine receptor (peripheral) (BZRP) plays an important role in the steroid syntheses of the adrenal glands and brain, which is possibly involved in the pathophysiology of mood disorders. We evaluated an association study between two missense variations of the BZRP gene and mood disorders in a Japanese sample. However, no statistically significant associations with either bipolar disorders or depressive disorders were observed in the allele frequencies, genotype counts, or haplotype distributions for the two variations, although the present sample size had a moderate power (0.46-0.86). These results do not suggest that the BZRP gene plays a role in the genetic predisposition of affective disorders.
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