在来自不同人群的29,745名发育障碍患者中对自体逆向编码变异进行联合分析
V Kartik Chundru1,2, Zhancheng Zhang3,4, Klaudia Walter1
1Wellcome Sanger Institute, Wellcome Genome Campus, Hinxton, UK.
Nature genetics
|September 23, 2024
概括
自体逆向编码变体对发育障碍有很大的贡献,特别是在祖先多样化的群体中. 改进已知的基因变异的解释提供了一个有前途的诊断策略.
科学领域:
- 遗传学 是一个遗传学.
- 发育生物学 发展生物学
- 医学研究 医学研究
背景情况:
- 自体逆向编码变体是罕见遗传疾病的确立原因.
- 发育障碍具有复杂的遗传基础,衰退变异的显著贡献.
- 了解不同祖先的变异影响对于公平的遗传诊断至关重要.
研究的目的:
- 量化自体逆向编码变体对大量多样化的队列中发育障碍的贡献.
- 识别与自体逆向发育障碍 (ARDD) 相关的新型基因.
- 评估已知的ARDD基因与未知的ARDD基因解释的遗传负担的比例.
主要方法:
- 对一个具有多样性遗传祖先的大队列 (29,745个三元组) 的分析.
- 在祖先群体中对外体全方位的自体逆向编码变体负担的量化.
- 变体负担与自致性水平和已知的ARDD基因的比较.
- 通过统计分析识别新的ARDD基因.
主要成果:
- 自体逆向编码变体约占整个祖先群体2-19%的发育障碍.
- 平均自致性与可归因于这些变体的患者比例有显著的相关性.
- 已确定的ARDD基因解释了84.0%的总递归编码负担.
- 在已建立的基因中,34.4%的负担归因于以前在ClinVar.中未报告的变异.
- 确定了两个新的ARDD基因,即KBTBD2和ZDHHC16.
结论:
- 自体逆向编码变体在发育障碍中起着实质性的作用,因祖先而异.
- 现有的ARDD基因解释了很大一部分遗传负担,许多新发现的致病变体.
- 专注于在已知的ARDD基因中改进误解变异的解释可能会提高诊断产量,而不是发现新的基因.
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