瘤性KRAS,素4和Activin A介导的纤维细胞激活合作促进PanIN的启动
Chun-Mei Hu1, Chien-Chang Huang1,2, Min-Fen Hsu1
1Genomics Research Center, Academia Sinica, Taipei, 11529, Taiwan.
Advanced science (Weinheim, Baden-Wurttemberg, Germany)
|November 15, 2023
概括
瘤性KRAS突变本身不会导致胰腺癌前体病变. 新的研究表明,Muc4过度表达和纤维细胞相互作用是关键因素,为早期胰腺管道腺癌的诊断和治疗提供了目标.
科学领域:
- 在瘤学瘤学.
- 分子生物学分子生物学
- 癌症研究 癌症研究
背景情况:
- 超过90%的胰腺管腺癌 (PDAC) 病例都存在瘤性KRAS突变.
- 突变的KRAS单独不足以启动胰腺内皮质瘤 (PanIN),这是PDAC的前体.
- 推动PanIN形成的额外因素在很大程度上是未知的.
研究的目的:
- 确定参与泛IN启动的最早事件和分子参与者.
- 调查微环境相互作用在Kras驱动的胰腺瘤发生中的作用.
- 探索早期PDAC干预的潜在治疗点.
主要方法:
- 利用光学清晰的3D组织学来分析来自Pdx1-Cre;LSL-Kras (KC) 小鼠的整个胰腺.
- 在小鼠模型和人类样本中检查了早期的PanIN病变的分子标记物和相关的细胞成分.
- 研究了Kras信号传递,Muc4表达,纤维细胞招募和Activin A.之间的机制联系.
- 评估了使用Follistatin (FST) 抑制Activin A信号传递的治疗潜力.
主要成果:
- 最早的PanINs过度表达Muc4并与αSMA+纤维细胞相关,无论其物理位置如何.
- 在胰腺细胞中的KrasG12D/+可提高Muc4的调节,通过Activin A分泌促进增殖和纤维细胞的招募.
- 在KC小鼠中,Activin A与FST的信号阻塞减少了纤维细胞的招募,并抑制了PanIN的启动和生长.
- 这些发现在人类胰腺组织样本中得到了验证.
结论:
- 癌症性Kras驱动的基因变异和微环境变化之间的相互作用对于PanIN启动至关重要.
- 通过Activin A调节的Muc4上调和纤维细胞招募是PDAC前体发展的关键早期事件.
- 向Activin A信号提供了一个有前途的策略,用于早期PDAC诊断和治疗干预.
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