复杂的HPV-人类DNA结构通过在HPV-癌症衍生细胞系中进行大规模DNA分析而揭示出来
bioRxiv : the preprint server for biology
|December 3, 2025
概括
人类乳头瘤病毒 (HPV) 在癌症中的DNA整合形成了复杂的结构. 这项研究揭示了新的染色体内HPV-人类DNA架构,并证明了光现场杂交 (FISH) 的实用性.
科学领域:
- 基因组学就是基因组学.
- 癌症生物学 癌症生物学
- 分子瘤学分子瘤学
背景情况:
- 人类乳头瘤病毒 (HPV) DNA 整合是HPV相关癌症的标志,通常存在于异染色体圈或异染色体内段.
- 综合HPV-人类DNA结构的精确架构和大规模组织仍然不太清楚,这阻碍了在异染色体DNA (ecDNA) 和综合形式之间进行准确的区分.
研究的目的:
- 阐明HPV DNA的复杂基因组结构,在HPV16阳性口腔癌细胞系内集成到人类基因组中.
- 描述大规模HPV-人类DNA异构体的形成和局部化.
- 评估补充基因组工具的实用性,包括光现场混合 (FISH),以区分综合和异染色体DNA.
主要方法:
- 用单核酸对大基底分辨率的互补基因组学工具的应用,包括长时间读取的DNA测序和光学基因组映射.
- 利用光现场杂交 (FISH) 来确定HPV-人类DNA结构的亚细胞局部.
- 采用长读RNA测序来分析HPV-人类DNA模板集成的转录生成.
主要成果:
- 一个初始的HPV16整合事件形成了一个23kb的异种体循环,涉及HPV16DNA和人类TP63基因.
- 随后的基因组重新排列导致了大型异构体协奏组的形成 (高达0.6 Mb) 和复杂的重新排列.
- 在100%的细胞中,FISH证实了这些异构体在染色体3上的TP63位点的染色体内定位.
- 染色体内模板产生了拼接,多基化转录,其中一些细胞还含有来自这些结构的染色体外HPV16DNA.
结论:
- 定义了癌细胞内集成的HPVDNA的以前未被识别的更高阶架构.
- 证明了FISH在准确区分染色体内与染色体外DNA结构中的关键作用.
- 强调了HPV DNA整合的动态性质及其产生复杂基因组重组和功能转录的潜力.
相关概念视频
DNA Helicases
23.8K
DNA unwinding helicase enzymes are a type of motor protein. Motor proteins can translocate along filaments or polymers using energy generated from ATP hydrolysis. Helicases are involved in all the important cellular processes where DNA unwinding is required, such as DNA replication, repair, recombination, and transcription. They are present in all living organisms, but vary in their structure, function, and mechanism of action. For example, in prokaryotes, DnaB helicase binds and translocates...
23.8K
What is Cancer?
13.9K
Cells and tissues must meticulously coordinate their activities for the normal functioning of the human body. Therefore, they exhibit socially responsible behavior - resting, growing, dividing, differentiating, or dying - for the organism’s benefit. Cancer arises when cells divide uncontrollably and invade other tissues or organs.
Although people have known about cancer for centuries, it was only in 1761 that Giovanni Morgagni of Padua performed a detailed autopsy of...
Although people have known about cancer for centuries, it was only in 1761 that Giovanni Morgagni of Padua performed a detailed autopsy of...
13.9K
Cancers Originate from Somatic Mutations in a Single Cell
14.5K
Cancer arises from mutations in the critical genes that allow healthy cells to escape cell cycle regulation and acquire the ability to proliferate indefinitely. Though originating from a single mutation event in one of the originator cells, cancer progresses when the mutant cell lines continue to gain more and more mutations, and finally, become malignant. For example, chronic myelogenous leukemia (CML) develops initially as a non-lethal increase in white blood cells, which progressively...
14.5K
Karyotyping
68.0K
Overview
68.0K
The DNA Helix
28.3K
Deoxyribonucleic acid, or DNA, is the genetic material responsible for passing traits from generation to generation in all organisms and most viruses. DNA is composed of two strands of nucleotides that wind around each other to form a spring-like structure called a double helix. However, the double helix is not perfectly symmetrical. Instead, there are regularly occurring grooves in the structure. The major groove occurs where the sugar-phosphate backbones are relatively far apart. This space...
28.3K
The DNA Helix
155.1K
Overview
155.1K


