COUP-TFII抑制TGF-β诱导的生长屏障,促进前列腺瘤发生
Jun Qin1, San-Pin Wu, Chad J Creighton
1Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, Texas 77030, USA.
Nature
|December 4, 2012
概括
在PTEN突变前列腺癌中,COUP-TFII取消了天然生长障碍,促进了转移. 抑制COUP-TFII可能为侵袭性前列腺癌提供一种新的治疗策略.
科学领域:
- 在瘤学瘤学.
- 分子生物学分子生物学
- 遗传学 是一个遗传学.
背景情况:
- 前列腺癌通常涉及PTEN突变或PI3K通路改变.
- 变性PTEN变异瘤转移的机制尚不清楚.
- 转化生长因子-β (TGF-β) 信号传递可能作为对抗PTEN驱动的前列腺癌进展的检查点.
研究的目的:
- 调查COUP转录因子II (COUP-TFII) 在PTEN突变前列腺癌进展中的作用.
- 阐明COUP-TFII影响TGF-β信号传递和瘤转移的机制.
主要方法:
- 利用具有特定基因删除的基因工程小鼠模型 (PTEN,SMAD4).
- 分析了COUP-TFII与SMAD4的相互作用及其对TGF-β-依赖转录的影响.
- 在患者样本中,与临床结果和TGF-β信号相关联的COUP-TFII表达.
主要成果:
- 在PTEN-null瘤中,COUP-TFII抑制了SMAD4依赖的转录,覆盖了TGF-β生长障碍.
- COUP-TFII过度表达与PTEN删除合作,在小鼠中驱动侵略性的转移性前列腺癌.
- 失去了SMAD4可以抵消COUP-TFII切除的抑制作用.
- 高COUP-TFII表达与瘤复发和进展相关,并且与患者的TGF-β信号相反.
结论:
- COUP-TFII是一种关键的调节剂,它破坏了TGF-β介导的屏障,使PTEN突变前列腺癌成为转移性.
- 向COUP-TFII为治疗晚期和转移性前列腺癌提供了一个潜在的治疗策略.
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