3D基因组分析揭示了由复杂的结构变化引起的新型增强器劫持,这些变化驱动着基因过度表达
bioRxiv : the preprint server for biology
|February 8, 2024
概括
研究人员开发了高活性促进体相互作用 (HAPI) 分析,以检测癌症基因组中的增强器劫持. 这种3D基因组学方法通过非编码DNA识别瘤基因激活,揭示了新的治疗点.
科学领域:
- 基因组学就是基因组学.
- 癌症生物学 癌症生物学
- 3D基因组组织 3D基因组组织
背景情况:
- 癌症基因组在染色体和染色体外DNA (ecDNA) 上表现出复杂的结构变化.
- 鉴定激素基因激活的非编码增强器劫持因基因组复杂性而具有挑战性.
研究的目的:
- 开发和应用基于3D基因组学的分析,高度活跃的促进者相互作用 (HAPI),用于表征增强器劫持.
- 在癌细胞系中通过增强器劫持激活的瘤基因的识别.
主要方法:
- 利用来自34个癌细胞系的HiChIP数据.
- 应用HAPI分析来描述增强器劫持事件.
- 使用CRISPR干扰 (CRISPRi) 来研究基因相互作用和表达.
主要成果:
- 在HAPI分析中发现了增强器劫持,激活已知和新瘤基因 (例如MYC,CCND1,ETV1,CRKL,ID4).
- 在复杂的amplicons上观察到多个瘤基因的增强器劫持,包括ecDNA.
- 标志着一个MYC-ERBB2仿真ecDNA,其中ERBB2劫持了MYC增强剂,导致MYC促进体抑制时ERBB2表达升高.
结论:
- HAPI分析工具提供了一个强大的策略,用于检测癌症中增强器劫持.
- 这项研究揭示了对由增强器劫持驱动的瘤基因激活机制的新见解.
- 这些发现突出了针对癌症治疗的增强器劫持的潜力.
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