可移植元素的遗传和表观遗传重编程驱动eCDNA介导的转移性前列腺癌
Lisanne Mout1, Thaidy Moreno-Rodriguez2, Giacomo Grillo1
1Princess Margaret Cancer Centre, University Health Network, Toronto, Ontario, Canada.
bioRxiv : the preprint server for biology
|August 20, 2025
概括
外染色体DNA (ecDNA) 通过放大瘤基因来驱动癌症的进化. 在前列腺癌中,LINE1重复在ecDNA上激活AR基因,导致治疗耐药性.
科学领域:
- 瘤学 在瘤学方面.
- 遗传学 是一个遗传学.
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
背景情况:
- 外染色体DNA (ecDNA) 通过非门德尔复制促进了瘤的快速演变.
- 了解转移性割耐性前列腺癌 (mCRPC) 中瘤基因放大机制至关重要.
研究的目的:
- 研究ecDNA中重复DNA元素在驱动mCRPC中的瘤基因过度表达和瘤进化中的作用.
- 识别导致AR基因放大和过度表达的特定重复元素和调控机制.
主要方法:
- 来自mCRPC患者队伍的染色质可访问性,全基因组测序和Hi-C基因组拓数据的综合分析.
- 识别和表征与瘤基因共同增强的重复DNA元素.
主要成果:
- 一个mCRPC (20%) 的子组表现出放大了含有可访问的LINE1重复DNA元素的ecDNA,这些元素围绕着雄激素受体 (AR) 基因.
- 这些LINE1元素作为关键转录因子 (AR,FOXA1,HOXB13) 的结合点,并与AR基因形成新的3D染色体相互作用.
- 这种调节网络驱动AR过度表达,有助于抵抗雄激素信号抑制剂.
结论:
- 在ecDNA上表观遗传激活和放大重复DNA是瘤基因过度表达和瘤进化的关键驱动因素.
- 在mCRPC的一个子集中,LINE1元素在调节AR方面发挥着关键作用,促进治疗耐药性.
关键词:
ATAC ATAC ATAC ATAC ATAC ATAC ATAC ATAC ATAC ATAC ATAC ATAC ATAC ATAC ATAC ATAC ATAC ATAC ATAC ATAC ATACBFBB BFBB BFBB BFBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBB染色是一种染色素.在HiC中,HiC就是HiC.第1行 一线在WGS中,使用的是WGS.受体受体是受体的受体.割抵抗性前列腺癌是什么ecDNADNA ecDNADNA是什么意思内生重复的元素是内生重复的.增强剂是一种增强剂.这是表观遗传学.在表观基因组中,表观基因组是表观基因组的.前列腺癌是前列腺癌.转录因子是一种转录因子.可转移的元素可以转移.变种变种的变种相关概念视频
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