非编码变异是一种罕见的发育衰退性障碍的原因,与编码变异发生交换
Jenny Lord1, Carolina J Oquendo2, Htoo A Wai2
1School of Human Development and Health, Faculty of Medicine, University of Southampton, Southampton, United Kingdom; Sheffield Institute for Translational Neuroscience (SITraN), The University of Sheffield, Sheffield, United Kingdom.
这项研究表明,非编码变体可以在罕见的发育障碍 (DDs) 中充当"第二次打击". 一种系统的方法在3个探头中确定了可能的诊断,这表明这种机制是DDS的罕见原因.
科学领域:
- 遗传学 遗传学 是一个
- 基因组学就是基因组学.
- 罕见疾病 罕见疾病
背景情况:
- 鉴定致病性非编码变体是基因诊断中的一个重大挑战.
- 患有发育障碍 (DD) 的人通常在衰退基因中具有单个蛋白质改变变异,但非编码变异的作用尚不清楚.
研究的目的:
- 调查致病性非编码变异的流行率和诊断效用,作为未诊断发育障碍的个体的第二次打击.
- 开发一种系统的方法来识别复合异合体编码/非编码变体.
主要方法:
- 分析了来自10万个基因组项目的4073个三组探针,在衰退的DD相关基因中具有罕见的异合体蛋白质改变变体.
- 识别了罕见的非编码变体在转基因 (内子,UTR,促进剂,增强剂) 中,并进行了临床评估和功能测试.
主要成果:
- 在2430名试验者中,在衰退的DD基因中发现了3761种罕见的异质合体变异.
- 在这些病例中,在1366 (36.3%) 的trans中发现了至少一个罕见的非编码变异.
- 在3个试验组 (GAA,NPHP3,PKHD1) 中确定了可能的诊断,并在另外3个试验组中确定了候选诊断,突出了诊断潜力.
结论:
- 开发了一种系统方法,以发现涉及复合异合体编码/非编码变体的新诊断.
- 这种机制虽然罕见,但对发育障碍和基因诊断有很大的贡献.
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