综合分析强调了三维基因组与转移性前列腺癌中的DNA,RNA和表观基因组变化之间的相互作用
Shuang G Zhao1,2,3, Matthew Bootsma1, Stanley Zhou4,5
1Department of Human Oncology, University of Wisconsin-Madison, Madison, WI, USA.
Nature genetics
|July 17, 2024
概括
前列腺癌的基因组结构变异会影响基因表达和甲基化. 与染色体外DNA (ecDNA) 相关的特定染色质变化与针对雄激素受体 (AR) 的治疗反应不佳相关.
科学领域:
- 基因组学就是基因组学.
- 癌症生物学 癌症生物学
- 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:
- 三维基因组结构变异越来越被认可,但在固体瘤中未得到充分研究.
- 转移性割抵抗性前列腺癌 (mCRPC) 呈现出复杂的基因组和表观基因组景观.
研究的目的:
- 研究基因组架构对基因表达,甲基化和mCRPC结构变异的影响.
- 确定与前列腺癌治疗反应和预后相关的基因组特征.
主要方法:
- 集成的深度Hi-C,全基因组测序,全基因组双硫酸盐测序,5-氧甲基细胞素 (5hmC) 测序和RNA测序.
- 分析了来自mCRPC患者的80个活检样本.
- 开放的 (A) 和封闭的 (B) 染色体区的比较.
主要成果:
- 染色体间基因表达,DNA甲基化 (5mC/5hmC) 和结构变异率的显著差异.
- 瘤的一个子集中AR位点的贫乏色素接触,与异染色体圆形DNA (ecDNA) 和对AR信号抑制剂的反应不佳有关.
- 识别具有差异甲基化,基因表达和预后的不同拓亚型.
- 有证据表明DNA相互作用会导致结构变异的形成,例如TMPRSS2-ERG融合.
结论:
- 综合多基因组测序揭示了mCRPC中3D基因组结构的关键作用.
- 染色质拓和ecDNA形成与AR信号抑制剂耐药性有关.
- 这项研究为了解前列腺癌进展和治疗脆弱性提供了宝贵的临床瘤资源.
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