在状细胞肺癌中,体质重组导致FGFR1的瘤性域外缺失
Florian Malchers1, Lucia Nogova2, Martijn Ha van Attekum1
1University of Cologne, Faculty of Medicine and University Hospital Cologne, Department of Translational Genomics, Cologne, Germany Germany.
The Journal of clinical investigation
|August 22, 2023
概括
在平细胞肺癌 (SQLC) 中频繁的8p11-p12放大与FGFR1依赖有关. 由特定的基因组重组驱动的新型ectodomain缺陷FGFR1变异解释了治疗耐药性,并可能预测治疗反应.
科学领域:
- 在瘤学瘤学.
- 基因组学就是基因组学.
- 癌症生物学 癌症生物学
背景情况:
- 状细胞肺癌 (SQLC) 经常表现出8p11-p12放大,这意味着FGFR1是潜在的治疗点.
- 临床试验显示,在8p11放大的患者中,对FGFR激酶抑制剂的反应有限,因此需要更深入地了解FGFR1依赖性.
研究的目的:
- 研究8p11-p12放大SQLC中FGFR1依赖的基因组机制.
- 确定新的FGFR1变异及其与SQLC治疗反应的关联.
主要方法:
- 52个SQLCs的深度基因组特征与8p11-p12放大.
- 对接受FGFR抑制剂治疗的患者瘤的分析.
- 在体外和体内瘤发生性测定用于已识别的FGFR1变异.
主要成果:
- 由于内基因尾到尾重组,发现了体质改变的FGFR1变异,其中删除了1-8 (ΔEC-FGFR1) 外基因.
- 在瘤中 ΔEC-FGFR1 的表达和其瘤生成潜力的证明.
- 在FGFR1附近的尾到尾重组与FGFR1依赖性和有限的抑制剂反应的关联.
结论:
- 断裂-融合-桥梁循环驱动SQLC中的8p11-p12放大和相关的重排.
- 由尾对尾重排序引起的FGFR1外域缺陷变体和FGFR1中心放大,代表了FGFR1驱动的SQLC的新机制.
- 这些特定的基因组事件可以作为FGFR1依赖性和SQLC治疗疗效的预测生物标志物.
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