首页> 美国卫生研究院文献>American Journal of Human Genetics >A Quantitative-Trait Analysis of Human Plasma–Dopamine β-Hydroxylase Activity: Evidence for a Major Functional Polymorphism at the DBH Locus
【2h】

A Quantitative-Trait Analysis of Human Plasma–Dopamine β-Hydroxylase Activity: Evidence for a Major Functional Polymorphism at the DBH Locus

机译:人类血浆多巴胺β-羟化酶活性的定量特征分析:在DBH基因座的主要功能多态性的证据。

代理获取
本网站仅为用户提供外文OA文献查询和代理获取服务,本网站没有原文。下单后我们将采用程序或人工为您竭诚获取高质量的原文,但由于OA文献来源多样且变更频繁,仍可能出现获取不到、文献不完整或与标题不符等情况,如果获取不到我们将提供退款服务。请知悉。

摘要

Dopamine-β-hydroxylase (DβH) catalyzes the conversion of dopamine to norepinephrine and is released from sympathetic neurons into the circulation. Plasma-DβH activity varies widely between individuals, and a subgroup of the population has very low activity levels. Mounting evidence suggests that the DBH structural gene is itself the major quantitative-trait locus (QTL) for plasma-DβH activity, and a single unidentified polymorphism may account for a majority of the variation in activity levels. Through use of both sequencing-based mutational analysis of extreme phenotypes and genotype/phenotype correlations in samples from African American, European American (EA), and Japanese populations, we have identified a novel polymorphism (−1021C→T), in the 5′ flanking region of the DBH gene, that accounts for 35%–52% of the variation in plasma-DβH activity in these populations. In EAs, homozygosity at the T allele predicted the very low DβH–activity trait, and activity values in heterozygotes formed an intermediate distribution, indicating codominant inheritance. Our findings demonstrate that −1021C→T is a major genetic marker for plasma-DβH activity and provide new tools for investigation of the role of both DβH and the DBH gene in human disease.
机译:多巴胺-β-羟化酶(DβH)催化多巴胺向去甲肾上腺素的转化,并从交感神经元释放到循环中。血浆-DβH活性在个体之间差异很大,并且该人群的一个亚组的活性水平非常低。越来越多的证据表明,DBH结构基因本身是血浆DβH活性的主要定量性状基因座(QTL),单个未鉴定的多态性可解释活性水平的大部分变化。通过使用基于测序的极端表型和基因型/表型相关性的突变分析,分析了来自非洲裔美国人,欧洲人(EA)和日本人群的样本,我们在5'中鉴定出一种新颖的多态性(−1021C→T) DBH基因的侧翼区域,占这些人群血浆DβH活性变化的35%–52%。在EA中,T等位基因的纯合性预测了非常低的DβH-活性特征,杂合子中的活性值形成了中间分布,表明有显性遗传。我们的发现表明−1021C→T是血浆DβH活性的主要遗传标记,并为研究DβH和DBH基因在人类疾病中的作用提供了新的工具。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
代理获取

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号