自然的RNA圆圈作为高效的microRNA海绵起作用.
Thomas B Hansen1, Trine I Jensen, Bettina H Clausen
1Department of Molecular Biology and Genetics, Aarhus University, C.F. Møllers Alle 3, 8000C, Aarhus, Denmark.
Nature
|March 1, 2013
概括
循环RNAs (circRNAs) 可以充当miRNA海绵. 一种新的circRNA,ciRS-7,作为microRNA-7 (miR-7) 的强有力的海绵,影响大脑中的基因表达.
科学领域:
- 分子生物学分子生物学
- 遗传学 是一个遗传学.
- 在RNA生物学,RNA生物学.
背景情况:
- 微RNAs (miRNAs) 在转录后调节基因表达.
- miRNA活动可以通过竞争的内源RNAs (ceRNAs) 和目标仿真来调节.
- 循环RNAs (circRNAs) 是一种具有调节潜力的RNA分子类.
研究的目的:
- 研究人类和小鼠大脑中高度表达的circRNA的功能.
- 为了确定这个circRNA是否充当miRNA海绵.
- 在体内探索circRNA介导miRNA海绵的含义.
主要方法:
- 一个新型circRNA (ciRS-7) 的识别和表征.
- 评估ciRS-7与阿尔戈诺特 (AGO) 蛋白和miR-7的相互作用.
- 分析ciRS-7对miR-7活性和基因表达的影响.
- 在小鼠大脑中对ciRS-7和miR-7的体内联合表达分析.
- 作为miRNA海绵,对另一种circRNA (Sry) 的研究.
主要成果:
- 一个新的circRNA,ciRS-7,被确定并显示包含了众多miR-7点.
- ciRS-7以miR-7依赖的方式与AGO蛋白结合.
- ciRS-7作为一种强大的miR-7海绵,抑制miR-7活动并增加miR-7标水平.
- 在特定的小鼠大脑区域观察到ciRS-7和miR-7的重叠表达.
- 证明circRNA Sry可以作为miR-138海绵,表明一种一般现象.
结论:
- 循环RNA可以作为内源的miRNA海绵起作用.
- ciRS-7是miR-7的功能海绵,调节它在大脑中的活动.
- 循环RNA形成代表了miRNA海绵和基因调节的一般机制.
相关概念视频
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