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Mol Psychiatry. 2000 May;5(3):301-7.

Association analysis of the GABA(A) receptor subunit genes cluster on 5q33-34 and alcohol dependence in a Japanese population.

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Social, Genetic and Developmental Psychiatry Research Centre (SGDPRC), Institute of Psychiatry, De Crespigny Park, Denmark Hill, London SE5 8AF, UK.


Recent investigations suggest that genetic susceptibility to alcohol dependence may be conferred by GABA(A) receptor subunit genes. In this study, three RFLPs at the GABA(A)beta2, GABAAalpha6, GABA(A)alpha1 and two at the GABA(A)gamma2 receptor subunit genes, were examined for association with alcohol dependence in 189 subjects meeting DSM-III-R criteria for this disorder and 152 unrelated controls from a Japanese population. The results demonstrated no association between the AlwNI RFLP at the GABA(A)alpha6 receptor subunit gene and alcohol dependence (P = 0.059). However, the NciI RFLP at the GABA(A)gamma2 receptor subunit gene was associated with alcohol dependence comorbid with antisocial personality disorder (P = 0.021). This supports a recent finding reporting an association between the GABA(A)gamma2 receptor subunit gene and alcohol dependence with criminal record in a Finnish population. Taking into account the effects of multiple comparisons, this result should be interpreted with caution pending replication.

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