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Abstract ▼ AI-Helper

The finding of contrasting results regarding an association between schizophrenia and the Mlul polymorphism site in the dopamine $D_3$ receptor gene prompted us to study the distribution of this palymorphism in Korean schizophrenic patients and controls. The author's approach was case-con...

The finding of contrasting results regarding an association between schizophrenia and the Mlul polymorphism site in the dopamine $D_3$ receptor gene prompted us to study the distribution of this palymorphism in Korean schizophrenic patients and controls. The author's approach was case-control study. Schizophrenic patients (n=66) and controls (n=76) were examined by case-control study for distribution of the Mlul polymorphism of the dopamine $D_3$ receptor gene in Korean population to minimize the effect of racial differencies in gene frequencies. The frequency of the allele 1 in schizophrenic patients and controls was 0.66 and 0.76, respectively. There was no significant differencies in the frequency of the allele 1 between schizophrenic patients and controls ($x^2$=3.07, p>.05), and between positive and negative schizophrenic patients ($x^2$=1.02, p>.05). We present here the evidence of a lack of alleic association between the Mlul polymorphism of the dopamine $D_3$ receptor gene and Korean schizophrenic patients and also report no increased homozygosity for the Mlul polymorphism. The assumption that the dopamine $D_3$ receptor gene has a predisposing role in schizophrenia was not supported by this case-control study. Although, the possibility that this gene has a minor gene effects in the etiology of schizophrenia cannot be excluded because of the intrinsic limitations of the methods of analysis and number of subjects in our study.

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