A regulatory variation in OPRK1, the gene encoding the kappa-opioid receptor, is associated with alcohol dependence.

A regulatory variation in OPRK1, the gene encoding the kappa-opioid receptor, is associated with alcohol dependence.
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DOI:
10.1093/hmg/ddn068
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发表时间:
2008-06-15
影响因子:
3.5
通讯作者:
Foroud T
Foroud T
中科院分区:
生物学2区
文献类型:
--
作者:
Edenberg HJ;Wang J;Tian H;Pochareddy S;Xuei X;Wetherill L;Goate A;Hinrichs T;Kuperman S;Nurnberger JI Jr;Schuckit M;Tischfield JA;Foroud T

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Variations in OPRK1, which encodes the κ-opioid receptor, are associated with the risk for alcohol dependence. Sequencing DNAs with higher and lower risk haplotypes revealed an insertion/deletion (indel) with a net addition of 830 bp located 1986 bp upstream of the translation start site (1389 bp upstream of the transcription start site). We demonstrated that the upstream region extending from −1647 to −10 bp or from −2312 to −10 bp (relative to the translation start site) could function as a promoter in transient transfection assays. We then determined that the presence of the indel reduced transcriptional activity by half. We used a PCR assay to genotype individuals in 219 multiplex alcohol-dependent families of European American descent for the presence or absence of this indel. Family-based association analyses detected significant evidence of association of this insertion with alcoholism; the longer allele (with the indel), which had lower expression, is associated with higher risk for alcoholism. This indel is, therefore, a functional regulatory variation likely to explain at least part of the association of OPRK1 with alcohol dependence.
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