TGF-β和RAS联合揭示了开源的增强剂以驱动转移
Jun Ho Lee1, Francisco J Sánchez-Rivera2, Lan He1
1Cancer Biology and Genetics Program, Sloan Kettering Institute, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA.
Cell
|September 7, 2024
概括
转化生长因子β (TGF-β) 和RAS信号通过协调上皮细胞转移到介质细胞转移 (EMT) 和细胞外基质重塑 (ECM) 来推动肺腺癌转移. 这项研究确定了关键的染色质修饰,使这种协调的转移程序成为可能.
科学领域:
- 分子生物学
- 癌症研究
- 表观遗传学
背景情况:
- 表皮转移到介质细胞 (EMT) 和细胞外基质 (ECM) 的重塑对于癌症的侵袭和转移至关重要.
- 已知转化生长因子β (TGF-β) 和RAS信号通路诱导这些过程,但它们的协调调节尚未完全理解.
研究的目的:
- 阐明TGF-β和RAS信号共同调节肺腺癌转移中的EMT和ECM重塑的分子机制.
- 确定将基因表达与TGF-β和RAS信号输入联系在一起的染色体决定因素.
主要方法:
- 这项研究研究了RAS响应元素结合蛋白1 (REB1),SMAD蛋白和染色质修饰在调节纤维基因和EMT基因中的作用.
- 用染色体免疫沉和基因表达分析来确定调节因素及其相关因素.
主要成果:
- RREB1,以及在基因组H2A.Z上的特定基因组标记 (H4K16acK20ac),局部化到纤维基因增强剂 (IL11,PDGFB,HAS2) 和EMT因子SNAI1.
- 这些原始增强剂随后被SMAD4-INO80复合体激活,以响应TGF-β,显示出协调的转录程序.
- 这种调节机制将纤维化EMT程序与其他TGF-β反应分开.
结论:
- 由RREB1和特定的染色质状态调节的TGF-β和RAS信号的协调作用驱动肺腺癌转移.
- 了解这些监管网络揭示了转移程序中的弱点,
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