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在风险人群中的胰腺癌途径特异性基因组变化
Cecilia Monge1, Brigette Waldrup2, Francisco G Carranza2
1Center for Cancer Research, National Cancer Institute, Bethesda, MD 20892, USA.
International journal of molecular sciences
|August 28, 2025
概括
西班牙裔/拉丁裔胰腺癌患者在TGF-Beta等关键途径中表现出明显的基因突变,SMAD2和ERBB4等特定基因更为频繁. 这些发现凸显了对特定种族的精确瘤学的需求.
科学领域:
- 基因组学
- 癌症学
- 健康上的差异
背景情况:
- 胰腺癌 (PC) 具有攻击性,存活率较低,在晚期诊断的西班牙裔/拉丁裔 (H/L) 患者中影响不成比例.
- 在PC结果中驱动这些种族差异的分子机制尚不清楚.
- 在癌症中,关键的致癌途径 (TP53,WNT,PI3K,TGF-Beta,RTK/RAS) 经常发生变化.
研究的目的:
- 在H/L和非西班牙裔白人 (NHW) 胰腺癌患者之间描述和比较关键的致癌途径的突变.
- 调查可能影响胰腺癌的特定种族分子差异.
- 探索跨族群路径变化与生存结果之间的关联.
主要方法:
- 对4248名胰腺癌患者的公开基因组数据进行分析 (407名H/L,3841名NHW).
- 使用奇二测试对TP53,WNT,PI3K,TGF-Beta和RTK/RAS途径的突变频率进行比较.
- 根据路径变化评估生存差异的卡普兰-梅尔分析.
主要成果:
- 与NHW患者 (24. 4%) 相比,H/ L患者的TGF- Beta途径突变较少,特别是SMAD2和SMAD4的差异.
- 在H/ L患者中,SMAD2突变更为频繁 (1.5% vs. 0.4%),而SMAD4突变更为罕见 (15% vs. 19.9%).
- 基因ERBB4,ALK,HRAS,RIT1 (RTK/RAS) 和CTNNB1 (WNT) 显示出边界显著差异,H/L患者的发生频率更高.
结论:
- 在胰腺癌分子路径中存在显著的种族特异性变化,H/ L患者显示SMAD2,ERBB4,ALK和CTNNB1的突变增加.
- 特别是在NHW患者中,SMAD4和PI3K通路的改变显示出预后价值.
- 这些发现强调了将特定种族分子分析纳入胰腺癌精确瘤战略的必要性.
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