获得的SMARCA4变化:在肺腺癌中癌症进展的不常见因素
Andréanne Gagné1, Joao Victor M Alessi2, Biagio Ricciuti2
1Department of Pathology, Brigham and Women's Hospital, 75 Francis Street, Boston MA 02115, USA.
Lung cancer (Amsterdam, Netherlands)
|July 1, 2025
概括
获得的SMARCA4突变在非小细胞肺癌中罕见,但在治疗期间可能出现,可能导致瘤进展. 这些遗传变化可能与瘤突变负担增加和瘤特征改变有关.
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:
- 在非小细胞肺癌 (NSCLC) 和胸部瘤的子集中观察到SMARCA4无活化,通常作为吸烟者的早期事件.
- 获得的SMARCA4变化很少被记录下来,它们在瘤进展和治疗耐药性方面的频率和意义仍然不清楚.
研究的目的:
- 调查系统治疗后非小细胞肺癌 (NSCLC) 中获得的SMARCA4突变的频率和重要性.
- 探索SMARCA4失活作为瘤进展和抗性的机制的潜在作用.
主要方法:
- 追溯分析了4154名具有瘤基因组概况的患者,通过至少两次测序测试识别了NSCLC患者.
- 研究具有致病性SMARCA4突变的克隆相关瘤样本,以及临床和本病理学数据.
主要成果:
- 在354名患者中,有7名患者 (2.0%) 在治疗晚期或复发性NSCLC后获得了致病性SMARCA4突变.
- 在5/7的病例中,SMARCA4的获取与瘤突变负担 (TMB) 的增加有关,在2/7的病例中出现了形态变化,这表明病理生物学意义.
结论:
- 获得的SMARCA4突变是NSCLC的罕见事件,但在全身治疗压力下可能出现.
- SMARCA4突变的出现可能表明治疗耐药性和瘤进展的机制,有时伴随着TMB增加和形态变化.
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