Whole-exome sequencing enables rapid determination of xeroderma pigmentosum molecular etiology.

Whole-exome sequencing enables rapid determination of xeroderma pigmentosum molecular etiology.
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DOI:
10.1371/journal.pone.0064692
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发表时间:
2014
期刊:
影响因子:
3.7
通讯作者:
Laissue P
Laissue P
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Ortega-Recalde O;Vergara JI;Fonseca DJ;Ríos X;Mosquera H;Bermúdez OM;Medina CL;Vargas CI;Pallares AE;Restrepo CM;Laissue P

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色素性干皮病 (XP) 是一种罕见的常染色体隐性遗传疾病,其特征是对皮肤光化性色素沉着变化极其敏感,并且皮肤癌的发病率增加。在某些情况下,患者会受到神经系统改变的影响。 XP 是由 8 个不同基因(XPA 到 XPG 和 XPV)的突变引起的。该疾病的 XP-V(变异)亚型是由编码 Y-DNA 聚合酶家族成员 Polη 的基因(XPV,也称为 POLH)突变引起的。尽管 XP 亚型之间皮肤和神经功能障碍的存在和严重程度有所不同,但亚型之间存在重叠的临床特征,因此无法从临床特征推断出亚型。在本研究中,为了克服这一缺点,我们对两名 XP 同胞及其父亲进行了全外显子组测序。我们在 POLH 中发现了一种新的纯合无义突变(c.897T>G,p.Y299X),它导致了这种疾病。我们的结果表明,下一代测序是快速确定 XP 遗传病因的有效方法。
Xeroderma pigmentosum (XP) is a rare autosomal recessive disorder characterized by extreme sensitivity to actinic pigmentation changes in the skin and increased incidence of skin cancer. In some cases, patients are affected by neurological alterations. XP is caused by mutations in 8 distinct genes (XPA through XPG and XPV). The XP-V (variant) subtype of the disease results from mutations in a gene (XPV, also named POLH) which encodes for Polη, a member of the Y-DNA polymerase family. Although the presence and severity of skin and neurological dysfunctions differ between XP subtypes, there are overlapping clinical features among subtypes such that the sub-type cannot be deduced from the clinical features. In this study, in order to overcome this drawback, we undertook whole-exome sequencing in two XP sibs and their father. We identified a novel homozygous nonsense mutation (c.897T>G, p.Y299X) in POLH which causes the disease. Our results demonstrate that next generation sequencing is a powerful approach to rapid determination of XP genetic etiology.
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