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通过TARBP2结合mRNA发针的转移抑制剂转录失稳
Hani Goodarzi1, Steven Zhang1, Colin G Buss1
1Laboratory of Systems Cancer Biology, Rockefeller University, 1230 York Avenue, New York, New York 10065, USA.
Nature
|July 22, 2014
概括
研究人员发现了新的RNA结构 (sRSEs) 影响乳腺癌转移. TARBP2蛋白结合了这些元素,破坏了关键基因的稳定,促进了癌症的传播,揭示了新的治疗点.
科学领域:
- 分子生物学分子生物学
- 癌症研究 癌症研究
- 在RNA生物学,RNA生物学.
背景情况:
- 异常的RNA稳定性调节在疾病中至关重要,包括癌症的进展.
- 向mRNA的微RNA是已知的转录后调节器,但结构mRNA元素在癌症中的作用尚未被探索.
研究的目的:
- 确定乳腺癌中mRNA稳定性的新型转录后调节剂.
- 研究RNA结构元素在癌症转移中的作用.
主要方法:
- 在同位素的人类乳腺癌系中测量全基因组转录稳定性.
- 搜索RNA序列和结构空间的计算框架.
- 生物化学方法来识别结合RNA结构元素的转变因子.
主要成果:
- 发现GC丰富的结构性RNA稳定元件 (sRSEs) 在转移细胞中过度表现.
- 鉴定TARBP2作为跨因子结合的sRSEs和类似元素 (TBSEs).
- 在转移细胞和瘤中TARBP2过度表达会破坏转移抑制基因APP和ZNF395的稳定,促进入侵和殖民.
结论:
- 在基因调节中,TARBP2通过结合mRNA结构元素并促进破坏稳定,发挥非正规的作用.
- 通过结构元素调节的RNA不稳定性控制着癌症的进展.
- APP和ZNF395作为新型乳腺癌转移抑制剂.
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