鉴定了一种SNAI1增强剂RNA,该RNA驱动癌细胞可塑性
Chuannan Fan1, Qian Wang2, Peter H L Krijger3
1Oncode Institute and Department of Cell and Chemical Biology, Leiden University Medical Center, Leiden, The Netherlands.
Nature communications
|March 26, 2025
概括
像SNAI1e这样的增强器RNA (eRNA) 是基因表达的关键. 通过调节SNAI1和TGF-β信号传递,SNAI1e驱动癌细胞的可塑性,包括EMT和化学抵抗.
科学领域:
- 分子生物学分子生物学
- 癌症研究 癌症研究
- 非编码RNA生物学
背景情况:
- 增强子RNA (eRNA) 是源自增强子的非编码RNA,在基因调节中起着至关重要的作用.
- 转化生长因子-β (TGF-β) 信号传递对细胞过程至关重要,包括上皮-介质细胞转换 (EMT),并且在癌症中经常受到调节.
研究的目的:
- 确定和描述增强子RNAs在调节SNAI1表达和癌症中TGF-β/SMAD信号传递中的作用.
- 阐明SNAI1e影响癌细胞可塑性和治疗耐药性的机制.
主要方法:
- 确定SNAI1e (SCREEM2) 是一个关键的eRNA.
- 使用siRNA评估SNAI1e的功能影响的耗尽研究.
- 分析TGF-β诱导的EMT,迁移,体内外流动,干性和化疗耐药性.
- 研究SNAI1e的机制,包括BRD4的招募和SNAI1的表达.
- 探索SNAI1与SMAD7的相互作用及其对TβRI降解的影响.
主要成果:
- SNAI1e作为SNAI1表达的关键激活剂,并增强癌细胞中的TGF-β/SMAD信号传递.
- 在乳腺癌中,SNAI1e的枯竭显著损害了TGF-β诱导的EMT,迁移,体内外流,干性和化疗耐药性.
- SNAI1e通过与SNAI1增强剂结合并增加BRD4的丰富而起作用,从而促进SNAI1.1的Cis调节.
- 由SNAI1e调节的SNAI1与SMAD7相互作用,防止其降解,从而稳定TGF-β信号传递.
结论:
- 在癌症中,SNAI1e是SNAI1表达和TGF-β诱导的细胞可塑性的关键驱动因素.
- SNAI1e代表了调节癌症进展和克服化疗抵抗的潜在治疗标.
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