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Updated: Sep 19, 2025

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使用sci-L3-Strand-seq进行自发性线粒交叉和基因组不稳定事件的高通量映射

Peter Chovanec¹, Trevor Ridgley¹, Yi Yin¹

¹Department of Human Genetics, David Geffen School of Medicine, UCLA, Los Angeles, CA, 90095, USA.

bioRxiv : the preprint server for biology

|June 6, 2025

概括

一种名为sci-L3-Strand-seq的新方法,可以在数百万个单细胞中,低成本地检测出DNA结构重组. 这推动了对基因组不稳定性,DNA修复和癌症进化的研究.

科学领域:

基因组学就是基因组学.
分子生物学分子生物学
遗传学是一个遗传学.

背景情况:

在单细胞中检测结构重组,特别是无错误的姐妹染色体交换,是基因组学中的一个重大挑战.
现有的方法缺乏全面绘制线粒体交叉事件和基因组不稳定性的可扩展性和分辨率.

研究的目的:

引入sci-L3-Strand-seq,一种可扩展的单细胞测序方法,用于绘制线粒体交叉和基因组不稳定性的地图.
开发一个用于分析多面单细胞基因型数据的计算框架,包括滞留性和拷贝数.

主要方法:

sci-L3-Strand-seq:用于DNA模板链序列的组合索引和线性放大方法.
滞留的计算分析,数字拷贝数计数,以及对哈普洛型敏感的染色体细分.
在成千上万个单细胞中量化无错误和突变交叉.

主要成果:

在数千个细胞中成功量化了无错误和突变交叉率.
启用了对基因组和表观基因组特征丰富模式的探索.
透露了通过克隆系谱映射对基因组不稳定事件的时间顺序的见解.

结论:

sci-L3-Strand-seq提供了一个具有成本效益的平台,用于对结构变异和基因组不稳定性的大规模单细胞分析.
该方法促进了对DNA修复机制的研究,并在癌症进化研究和大规模突变查中具有潜在的应用.

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