Association between schizophrenia and homozygosity at the dopamine D3 receptor gene.

Crocq, M A; Mant, R; Asherson, P; Williams, J; Hode, Y; Mayerova, A; Collier, D; Lannfelt, L et al. · J Med Genet · 1992

case_control · Level III

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Abstract

Disturbances in dopamine neurotransmission have been postulated to underlie schizophrenia. We report data from two independent studies of a BalI polymorphism in the dopamine D3 receptor gene in patients with schizophrenia. In both studies, more patients than controls were homozygous (p = 0.005, p = 0.008). When pooled data were analysed, this difference was highly significant (p = 0.0001) with a relative risk of schizophrenia in homozygotes of 2.61 (95% confidence intervals 1.60-4.26).

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