在拉丁美洲人中,可操作的基因和胃癌的致癌途径
Ingrid M Montes-Rodríguez1, Hilmaris Centeno-Girona1, Sol V Pérez-Mártir1
1Division of Clinical & Translational Cancer Research, Medical Sciences Campus, University of Puerto Rico Comprehensive Cancer Center, San Juan, Puerto Rico.
Cancer medicine
|September 10, 2025
概括
波多黎各西班牙裔的胃癌 (GC) 显示出独特的基因突变,包括TP53和CDH1,可能导致更具侵略性的疾病. 了解这种遗传格局对于有针对性的治疗和改善结果至关重要.
科学领域:
- 基因组学和瘤学
- 癌症研究 癌症研究
- 人口遗传学 人口遗传学
背景情况:
- 胃癌 (GC) 是全球癌症死亡的主要原因,也是波多黎各 (PRH) 西班牙裔居民的重大健康问题.
- 在PRH中GC的遗传突变前景尚未被探索,这阻碍了针对这一群体的向治疗策略的开发.
- 识别流行遗传变异对于理解GC进展和改善PRH患者存活率至关重要.
研究的目的:
- 确定波多黎各西班牙裔 (PRH) 的胃癌 (GC) 瘤中最常见的基因变异.
- 将PRH中的GC的遗传突变概况与非西班牙裔队伍的遗传突变概况进行比较.
- 了解这些遗传差异对瘤生物学和PRH潜在治疗策略的影响.
主要方法:
- 从106个PRHGC病例 (2015-2022) 中分析瘤突变概况.
- 使用下一代测序数据对85例病例进行了分类,分为超突变和非超突变组.
- 突变频率与癌症基因组图谱 (TCGA) 队列的比较.
主要成果:
- 在非多变异的GC中,PRH中最常见的突变是TP53 (56.9%),CDH1 (29.2%),ARID1A (27.4%) 和KMT2D (25.7%).
- 与TCGA相比,PRH在关键驱动基因中的突变频率显著更高.
- 在PRH中,肠类GC显示出更高的TP53突变,而扩散型GC则增加了CDH1突变.
结论:
- 在PRH中GC的独特遗传特征表明瘤生物学可能更具侵略性,预后更差.
- 肠类型的GC与染色体不稳定性 (CIN) 保持一致,而扩散型GC与基因组稳定性 (GS) 分类保持一致,具有明显的驱动突变.
- 将西班牙裔人口纳入基因组研究对于全面了解GC风险,进展以及开发有效的个性化疗法至关重要.
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