在胰腺癌中介质子群的合成脆弱性
Giannicola Genovese1, Alessandro Carugo1,2,3, James Tepper1
1Department of Genomic Medicine, The University of Texas MD Anderson Cancer Center, Houston, Texas 77030, USA.
Nature
|February 9, 2017
概括
胰腺癌细胞可以通过关闭致癌的Kras信号和激活Smarcb1-Myc网络而变得具有攻击性. 针对蛋白质代谢和应激反应可能会阻止胰腺管腺癌 (PDAC) 的这种攻击行为.
科学领域:
- 癌症学
- 分子生物学
- 癌症研究
背景情况:
- 癌细胞的可塑性对于瘤的进展和治疗耐药性至关重要.
- 胰腺管腺癌 (PDAC) 表现出显著的表型多样性和异质性.
- 了解Kras独立的癌细胞可塑性是克服治疗挑战的关键.
研究的目的:
- 阐明PDAC中驱动癌细胞可塑性的分子和细胞机制.
- 确定参与克拉斯独立瘤细胞适应和攻击行为的途径.
- 探索针对这些适应机制的潜在治疗策略.
主要方法:
- 使用PDAC的条件瘤克拉斯小鼠模型.
- 使用转录和功能分析来研究Kras-独立的逃生群体.
- 开发了一个体质马赛克模型来限制细胞命运的时间干扰.
- 研究了Smarcb1,Myc和内质网膜应激通路的作用.
主要成果:
- 克拉斯独立的PDAC细胞表现出Smarcb1-Myc网络驱动的中酶体重编程,独立于MAPK信号.
- 减少Smarcb1激活了Myc网络,促进了合成代谢和蛋白质代谢.
- 介质细胞中的蛋白质循环增加会产生对蛋白质稳定和ER应激途径干扰的敏感性.
- 针对未折叠蛋白质反应的组合疗法在PDAC模型中抑制了侵袭性间酶子群的出现.
结论:
- 在PDAC中激活Smarcb1-Myc网络驱动了激进的介质细胞重编程.
- 针对蛋白质新陈代谢和内质网膜应激通路提供了潜在的治疗策略.
- 抑制未折叠的蛋白质反应可以阻止侵袭性PDAC表型的发展.
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