Exome sequencing supports a de novo mutational paradigm for schizophrenia.

Exome sequencing supports a de novo mutational paradigm for schizophrenia.
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DOI:
10.1038/ng.902
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发表时间:
2011-08-07
期刊:
影响因子:
30.8
通讯作者:
Karayiorgou, Maria
Karayiorgou, Maria
中科院分区:
生物学1区
文献类型:
--
作者:
Xu, Bin;Roos, J. Louw;Dexheimer, Phillip;Boone, Braden;Plummer, Brooks;Levy, Shawn;Gogos, Joseph A.;Karayiorgou, Maria

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尽管遗传性很高,但很大一部分精神分裂症病例没有家族病史(散发病例)。在这里,我们通过对53例散发病例、22例未受影响的对照及其父母的外显子组进行测序,研究了罕见的从头蛋白质改变突变对精神分裂症遗传组成部分的可能性。我们在27例患者中发现了40个影响40个基因的从头突变,包括DGCR 2中的一个潜在破坏性突变,该基因被复发性精神分裂症易感性22q11.2微缺失所删除。与罕见的遗传变异的比较显示,所鉴定的从头突变在病例中显示出大量过量的非同义变化,以及影响蛋白质结构和功能的更大潜力。我们的分析揭示了在精神分裂症中从头突变的主要作用,也是一个大的突变靶点,这两者共同为该疾病的高全球发病率和持续性提供了合理的解释。
Despite high heritability, a large fraction of cases with schizophrenia do not have a family history of the disease (sporadic cases). Here, we examine the possibility that rare de novo protein-altering mutations contribute to the genetic component of schizophrenia by sequencing the exome of 53 sporadic cases, 22 unaffected controls and their parents. We identified 40 de novo mutations in 27 patients affecting 40 genes including a potentially disruptive mutation in DGCR2, a gene removed by the recurrent schizophrenia-predisposing 22q11.2 microdeletion. Comparison to rare inherited variants revealed that the identified de novo mutations show a large excess of nonsynonymous changes in cases, as well as a greater potential to affect protein structure and function. Our analysis reveals a major role of de novo mutations in schizophrenia and also a large mutational target, which together provide a plausible explanation for the high global incidence and persistence of the disease.
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