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肺癌的基因组景观肺癌的基因组景观

Hyun Jung Kwon^1,2, Sejoon Lee², Yeon Bi Han^1,2

¹Department of Pathology, Seoul National University College of Medicine, Seoul, Korea.

Cancer research and treatment

|November 17, 2023

概括

肺肉类瘤 (PSC) 在进展过程中显示了APOBEC特征的减少和亚克隆多样性. 频繁的MET突变和强大的PD-L1表达区分PSC,建议为量身定制的治疗策略提供下一代测序.

科学领域:

在瘤学瘤学.
遗传学是一个遗传学.
癌症演化演化癌症演化

背景情况:

肺肉类瘤 (PSC) 是一种罕见的,激进的非小细胞肺癌 (NSCLC) 亚型.
对于PSC存在有限的治疗选择,需要更深入地了解其演变.

研究的目的:

使用多区域和纵向瘤样本阐明PSC的进化轨迹.
为了确定关键的遗传改变和突变特征驱动PSC的进展.

主要方法:

从31名PSC患者的原发性瘤和纵向样本的整体外体序列测序.
数字滴滴PCR (ddPCR) 和PD-L1免疫组织化学 (Ventana SP263试验).
在癌症和瘤组件中分析突变特征.

主要成果:

TP53突变的发生频率很高 (74%为原发性,73%为转移性).
转基因突变异位子14跳转突变和TP53突变是相互排斥的;转基因突变与MDM2放大同时发生.
转移性瘤表现出与原发性瘤不同的遗传特征,在转移期间APOBEC特征下降.
与其他NSCLC相比,PSC显示MET和KEAP1突变增加,PD-L1表达更高.

结论:

在PSC恶性进展的特点是减少APOBEC签名和亚克隆多样性.
频繁的MET突变和强大的PD-L1表达是区分PSC与其他NSCLC的标志.
深厚的瘤内和瘤间遗传多样性可能有助于PSC的攻击性和治疗挑战.
下一代测序对引导PSC个性化治疗策略充满希望.

关键词:

这是APOBECAPOBECAPOBECAPOBECAPOBECAPOBECAPOBECAPOBECAPOBECAPOBECAPOBECAPOBECAPOBEC 外体序列的排序方式在MET中,MET是MET.编程细胞死亡 - - 结合物1 肺部肉类瘤癌是肺部的肉类瘤.

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