scCircle-seq揭示了单细胞中染色体外圆形DNA的多样性和复杂性
Jinxin Phaedo Chen1,2, Constantin Diekmann3,4, Honggui Wu5,6
1Department of Microbiology, Tumor and Cell Biology, Karolinska Institutet, Stockholm, 17177, Sweden. jinxin.chen@ki.se.
Nature communications
|February 26, 2024
概括
异染色体圆形DNA (eccDNA) 的单细胞测序揭示了它们在细胞调节和癌症中的多样性作用. 这种名为scCircle-seq的新方法表明,eccDNA在细胞之间存在差异,可以作为癌症生物标志物.
科学领域:
- 分子生物学分子生物学
- 遗传学 是一个遗传学.
- 癌症研究 癌症研究
背景情况:
- 染色体外圆形DNA (eccDNA) 是移动的遗传元素,影响基因拷贝数和核内的调节.
- 了解单细胞水平上的eccDNA多样性和功能对于生物和医学洞察至关重要.
研究的目的:
- 引入scCircle-seq,这是一个用于单细胞中eccDNAs分析的新方法.
- 研究eccDNAs的异质性,遗传和基因组起源.
- 探索eccDNAs在癌症诊断中的潜力.
主要方法:
- 开发和验证scCircle-seq用于单细胞eccDNA分析.
- 在正常和癌症细胞系中分析eccDNA景观.
- 在临床癌症样本 (前列腺癌和乳腺癌) 上使用scCircle-seq.
主要成果:
- scCircle-seq有效地描述了单细胞中的eccDNA多样性和复杂性.
- 大多数eccDNA都表现出显著的细胞间变异和随机遗传.
- eccDNAs来自特定的染色体区域 (H3K9me3,H3K27me3) 并由复制应激诱导.
- 在eccDNA拷贝数和基因表达之间缺乏相关性,除了像MYC这样的特定瘤基因外.
- 癌症特异性eccDNA景观被确定,在放大基因组区域的频率更高.
结论:
- scCircle-seq是一种可扩展的工具,用于在各种细胞和组织类型中剖析eccDNA复杂性.
- eccDNA 景观是特定于细胞类型的,可以用于细胞聚类.
- 对于癌症诊断和了解疾病机制,eccDNA具有显著的潜力.
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