推进长时间读取的纳米孔基因组组装和准确的变异,要求检测罕见疾病
medRxiv : the preprint server for health sciences
|September 4, 2024
概括
长读数测序 (LRS) 通过发现短读数测序 (SRS) 遗漏的变体,显著改善了罕见疾病的诊断. 这种先进的技术有助于解决复杂的遗传病例,增强临床基因组学.
科学领域:
- 基因组学就是基因组学.
- 罕见疾病 罕见疾病
- 分子生物学分子生物学
背景情况:
- 超过50%的罕见单一性疾病诊断仍然难以捉摸,即使在使用短读序列 (SRS) 进行全基因组分析后.
- 现有的测序方法难以识别复杂的变异,结构变异,并提供全面的分阶段,限制诊断产量.
研究的目的:
- 评估长读序列 (LRS) 在罕见疾病患者队列中的额外诊断效用.
- 与SRS相比,评估LRS在变种检测,分相和甲基化分析方面的能力.
主要方法:
- 纳米孔测序在98个罕见疾病样本 (41名试验者和家庭成员) 上进行,达到~36倍覆盖率和32kb读取N50.
- 纳普管道被用来产生组件,分相变种,并调用甲基化.
- 通过LRS与SRS检测到的变体的比较,包括结构变体 (SV) 和并联重复.
主要成果:
- 平均而言,LRS覆盖了约280个编码基因,其中包括SRS遗漏的约5个已知的门德尔病基因.
- LRS发现了更多的罕见变异,包括SV和串联重复,并实现了87%的蛋白质编码基因的完整分相.
- 十一名试验对象被诊断出具有多种遗传原因,包括de novo和复合异合体变体,大型SV和表观遗传修饰.
结论:
- 长读测序显著提高了罕见单基性疾病的诊断产量.
- 对于变种检测,分阶段和识别复杂的遗传结构,LRS提供了卓越的功能.
- 在未来的临床基因组学工作流程中,LRS显示了整合到改善罕见疾病诊断的巨大潜力.
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