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在单个试验中探索法医STR,SNP,InDels和DNA甲基化标记物的纳米孔直接测序性能
Desiree D S H de Bruin1, Martin A Haagmans2, Kristiaan J van der Gaag3
1Department of Human Genetics, Amsterdam University Medical Center, University of Amsterdam, Amsterdam, The Netherlands; CLHC, Amsterdam Center for Forensic Science and Medicine, University of Amsterdam, Amsterdam, The Netherlands.
Forensic science international. Genetics
|October 19, 2024
概括
牛津纳米孔技术 (ONT) 测序提供了一个有前途的法医方法,准确分析遗传和表观遗传标记,以估计和识别年龄. 需要进一步的研究来优化DNA输入,并解决案例应用的伦理问题.
科学领域:
- 法医科学 法医科学 法医科学
- 遗传学 遗传学 是一个
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
- 基因组测序是指基因组的测序.
背景情况:
- 法医DNA分析已经推进了大规模并行测序 (MPS),使得表型特征和祖先预测超出了身份匹配.
- 通过DNA甲基化分析估计生物年龄可以补充法医调查,特别是当传统的分析不足时.
- 这项研究探讨了牛津纳米孔技术 (ONT) 适应性测序,用于综合的法医遗传和表观遗传分析.
研究的目的:
- 通过使用ONT.验证综合法医第三代测序试验的性能.
- 将法医遗传标记 (STR,SNP,InDels,mtDNA) 与基于DNA甲基化的年龄分类器结合在一个工作流程中.
- 评估ONT适应测序在法医应用中的准确性和实用性.
主要方法:
- 从六个人的DNA被使用ONT的标准自适应性直接测序方法进行了测序.
- 将ONT数据与标准MPS和Illumina EPICDNA甲基化档案进行了比较.
- 分析包括自体和Y染色体STRs,InDels,SNP和DNA甲基化时钟 (例如,Horvath的时钟).
主要成果:
- 在ONT测序中,STRs (90-92%),SNP (98%呼叫率) 和线粒体DNA (mtDNA) 覆盖率 (100%一致性) 的高精度得到了实现.
- 来自ONT的DNA甲基化数据显示出与Horvath时钟的Illumina EPIC数据有很强的相关性 (皮尔森r=0.670.97).
- 与年龄相关的标记物显示出与时间年龄的不同相关性,其中一些具有很高的准确性 (例如,FHL2r = 0.96).
结论:
- ONT自适应测序对法医遗传和年龄相关的表观遗传标记具有很高的准确性,将其定位为法医 (epi) 遗传学的有希望的工具.
- 未来的研究应该专注于建立明确的数量/质量措施,优化案例工作的DNA输入,并解决表型/祖先分析的伦理考虑.
- ONT为综合遗传和表观遗传法医分析提供了一种潜在的方法,扩大了传统DNA分析之外的功能.
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