增强剂RNAs对于雌激素依赖的转录激活的功能性作用
Wenbo Li1, Dimple Notani, Qi Ma
1Howard Hughes Medical Institute, Department of Medicine, School of Medicine, University of California, San Diego, La Jolla, California 92093, USA.
Nature
|June 4, 2013
概括
增强器RNAs (eRNAs) 从增强器转录,并在基因调节中发挥功能作用. 这项研究表明,17β-雌醇 (E2) 诱导eRNAs,增强雌激素受体α (ER-α) 目标基因激活在乳腺癌细胞.
科学领域:
- 分子生物学分子生物学
- 遗传学 是一个遗传学.
- 癌症研究 癌症研究
背景情况:
- 基因增强剂对于调节基因表达至关重要.
- 增强器RNAs (eRNAs) 是从增强器转录的,但它们的功能仍然不清楚.
- 长非编码RNAs (lncRNAs) 在哺乳动物细胞中被广泛转录.
研究的目的:
- 研究eRNAs在基因调节中的功能作用.
- 为了确定eRNA是否具有功能或仅仅是增强器激活的副产品.
- 探索eRNAs在乳腺癌中17β-雌激醇 (E2) 诱导的基因表达中的作用.
主要方法:
- 研究了人类乳腺癌细胞中的eRNA转录.
- 研究了与E2结合的雌激素受体α (ER-α) 对eRNA转录的影响.
- 分析了eRNAs在增强剂-促进剂循环和基因激活中的作用.
- 研究了凝聚素对E2依赖基因激活的贡献.
主要成果:
- 与E2结合的ER-α在全球范围内增加了E2上调基因附近的增强剂上的eRNA转录.
- 诱导的eRNA增强了对标编码基因的依赖联体的诱导.
- eRNA加强了由ER-α结合启动的增强剂-促进剂循环.
- 凝聚素稳定了E2/ER-α/eRNA诱导的增强剂-促进剂循环,有助于基因激活.
结论:
- eRNA是功能转录,在基因调节中起着重要的作用.
- eRNAs是乳腺癌中E2/ER-α诱导的基因转录的关键媒介.
- 在各种受调节的基因转录程序中,eRNA可能起着重要的作用.
相关概念视频
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