在单细胞分辨率下解决克隆进化和染色体外DNA的选择
Josephine Deleuran Hendriksen1,2,3, Alessio Locallo1,2,3, Balthasar Clemens Schlotmann1,2
1The Finsen Laboratory, Copenhagen University Hospital - Rigshospitalet, Copenhagen, Denmark.
Genome biology
|January 29, 2026
概括
外染色体DNA (ecDNA) 驱动癌症生长和耐药性. 我们的新计算方法ecSingle揭示了ecDNA在瘤异质性和单细胞水平的进化中的作用.
科学领域:
- 基因组学就是基因组学.
- 癌症生物学 癌症生物学
- 计算生物学 计算生物学
背景情况:
- 外染色体DNA (ecDNA) 对癌症进展至关重要,影响瘤基因放大,瘤生长和耐药性.
- 由ecDNA驱动的内瘤异质性和克隆选择仍然不太了解.
- 了解ecDNA动态对于开发有效的癌症疗法至关重要.
研究的目的:
- 开发一种新的计算方法来分析单细胞水平的ecDNA异质性.
- 研究与癌症中的ecDNA相关的克隆进化和转录细胞状态.
- 为了更深入地了解ecDNA在瘤内异质性和细胞可塑性中的作用.
主要方法:
- 开发了ecSingle,一种利用单细胞RNA测序 (scRNA-seq) 的基失衡和异常表达的计算方法.
- 使用基因组测序和单分子长读测序进行验证的发现,以获得更高的ecDNA分辨率.
- 分析瘤样本以在单细胞水平上识别和表征携带瘤基因的ecDNA.
主要成果:
- 在使用ecSingle方法的瘤样本中识别了携带瘤基因的ecDNA.
- 证明了ecDNA的广泛的内异质性,其中亚克隆的ecDNA与不同的细胞状态相关.
- 展示了初级瘤中罕见的ecDNA阳性克隆如何扩展,在复发瘤中成为主导.
结论:
- 引入了一种新的单细胞方法 (ecSingle) 来研究ecDNA,使得克隆进化和细胞状态分析成为可能.
- 对ecDNA对瘤内异质性和癌细胞可塑性的贡献获得了重要的见解.
- 强调了针对癌症治疗策略的ecDNA动态的潜力.
更多相关视频
15:07VDJ-Seq: Deep Sequencing Analysis of Rearranged Immunoglobulin Heavy Chain Gene to Reveal Clonal Evolution Patterns of B Cell Lymphoma
Published on: December 28, 2015
27.3K
09:01Mutagenesis and Functional Selection Protocols for Directed Evolution of Proteins in E. coli
Published on: March 16, 2011
31.1K
相关概念视频
T Cell Activation and Clonal Selection
16.0K
T cells are integral to our adaptive immune system, recognizing and effectively responding to foreign antigens. T cell activation and clonal selection are pivotal in orchestrating this immune response. This article elucidates these mechanisms, detailing the roles of cluster of differentiation (CD) markers, major histocompatibility complex (MHC) molecules, costimulatory signals, and the process of clonal selection.
Naive T cells that have not yet encountered an antigen express two primary CD...
Naive T cells that have not yet encountered an antigen express two primary CD...
16.0K
The Evidence for Evolution
48.0K
Genetic variations accumulating within populations over generations give rise to biological evolution. Evolutionary changes can result in the formation of novel varieties and entire new species. These changes are responsible for the diverse forms of life inhabiting the planet. The evidence for evolution suggests that all living organisms descended from common ancestors.
48.0K
Convergent Evolution
32.8K
Evolution shapes the features of organisms over time, ensuring that they are suited for the environments in which they live. Sometimes, selection pressure leads to the rise of similar but unrelated adaptations in organisms with no recent common ancestors, a process known as convergent evolution.
32.8K
What is Natural Selection?
128.8K
Natural selection is an evolutionary process in which individuals with survival-promoting traits reproduce at higher rates. These favorable traits become more common within a population or species. Naturally selected traits initially arise via random genetic mutations. In order for selection to occur, there must be variation within a population, the trait controlling the variation must be heritable, and there must be an evolutionary advantage for variation in the trait.
128.8K
Eukaryotic Evolution
40.9K
The endosymbiont theory is the most widely accepted theory of eukaryotic evolution; however, its progression is still somewhat debated. According to the nucleus-first hypothesis, the ancestral prokaryote first evolved a membrane to enclose DNA and form the nucleus. Conversely, the mitochondria-first hypothesis suggests that the nucleus was formed after endosymbiosis of mitochondria.
Contrary to the endosymbiont theory, the eukaryote-first hypothesis proposes that the simpler prokaryotic and...
Contrary to the endosymbiont theory, the eukaryote-first hypothesis proposes that the simpler prokaryotic and...
40.9K
Synteny and Evolution
3.8K
John H. Renwick first coined the term “synteny” in 1971, which refers to the genes present on the same chromosomes, even if they are not genetically linked. The species with common ancestry tend to show conserved syntenic regions. Therefore, the concept of synteny is nowadays used to describe the evolutionary relationship between species.
Around 80 million years ago, the human and mice lineages diverged from the common ancestor. During the course of evolution, the ancestral...
Around 80 million years ago, the human and mice lineages diverged from the common ancestor. During the course of evolution, the ancestral...
3.8K
