癌症中的RNA改变的基因组基础
, Claudia Calabrese1, Natalie R Davidson2,3,4,5,6
1European Molecular Biology Laboratory, European Bioinformatics Institute, Hinxton, UK.
Nature
|February 7, 2020
概括
这项研究使用1188名捐赠者的转录组对癌症相关的基因变异进行了分类. 它将RNA变化与DNA变化联系在一起,揭示了体质拷贝数量的变化是基因表达变化的关键驱动因素.
科学领域:
- 基因组学
- 癌症生物学
- 转录组学
背景情况:
- 转录变化在癌症基因组中很常见,但由于数据异质性,将它们与特定的基因组变化联系起来具有挑战性.
- 之前的研究分析了转录组和全基因组测序的有限队列,阻碍了癌症中RNA变化的综合分析.
研究的目的:
- 创建迄今为止最全面的癌症相关基因变异目录.
- 将RNA变化与生殖线和体质DNA变化联系起来,并确定潜在的遗传机制.
- 为了解与癌症相关的基因和机制提供资源.
主要方法:
- 在全癌症全基因组分析 (PCAWG) 联盟中,从1,188名捐赠者的特征性瘤转录组.
- 使用匹配的全基因组测序数据将RNA变化与DNA变化联系起来.
- 确定了体质拷贝数变化,单核酸变异,拼接变化和基因融合与基因表达之间的关联.
主要成果:
- 人体副本数的改变被确定为基因表达变异的主要驱动因素.
- 在cis中发现了体质单核酸变体与基因表达之间的649个关联,其中许多与非编码区域相关.
- 发现与体质突变相关的1,900个拼接变化,
- 观察到82%的基因融合与结构变异有关,其中包括一种称为"桥梁"融合的新类.
结论:
- 这篇综合性摘要将RNA变异与基因组背景联系起来, 提供有关癌症机制的见解.
- 这项研究强调体质拷贝数量的改变和特定突变类型是癌症转录组变化的关键驱动因素.
- 发现了新的拼接变化和基因融合机制,扩大了对癌症基因组学的理解.
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