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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Investigation of dopamine system genes in obsessive-compulsive disorder.

Evidence from anatomical, pharmacological, and animal studies on the involvement of the dopamine system in obsessive-compulsive disorder (OCD) is mounting. This, along with evidence for a genetic diathesis provided by family and twin studies, prompted us to conduct genetic association studies of dopamine system genes in OCD. We genotyped OCD patients (n > 100) and matched controls for four loci: (1) a 40-base-pair repeat in the dopamine transporter gene; (2) the TaqIA polymorphism and the serine/cysteine variation in the D2 dopamine receptor gene; (3) an MscI polymorphism in the D3 dopamine receptor gene; and (4) a 48-base-pair repeat in the D4 dopamine receptor gene. Significant differences in allele frequencies were found between patients and controls for the D4 receptor gene, although replication is required with family-based controls before any conclusions can be entertained. This study represents the first comprehensive assessment of the roles of dopamine system genes in OCD.[1]


  1. Investigation of dopamine system genes in obsessive-compulsive disorder. Billett, E.A., Richter, M.A., Sam, F., Swinson, R.P., Dai, X.Y., King, N., Badri, F., Sasaki, T., Buchanan, J.A., Kennedy, J.L. Psychiatr. Genet. (1998) [Pubmed]
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