Ann Oncol:NSCLC患者使用外泌体RNA联合循环肿瘤DNA可改善体细胞突变的检测结果

2017-12-09 MedSci MedSci原创

使用循环肿瘤DNA(ctDNA)来检测体细胞突变的主要局限性在于一部分癌症患者的ctDNA水平较低。本研究探究了exosomal RNA(exoRNA)和无细胞DNA(cfDNA)联合分离是否可以改善用于检测NSCLC患者EGFR突变的血液液态活检效果。研究纳入了在TIGER-X(NCT01526928)登记的84名患者,收集预处理肿瘤和血浆样本。分离exoRNA和cfDNA(exoNA)以分析突

使用循环肿瘤DNA(ctDNA)来检测体细胞突变的主要局限性在于一部分癌症患者的ctDNA水平较低。本研究探究了exosomal RNA(exoRNA)和无细胞DNA(cfDNA)联合分离是否可以改善用于检测NSCLC患者EGFR突变的血液液态活检效果。

研究纳入了在TIGER-X(NCT01526928)登记的84名患者,收集预处理肿瘤和血浆样本。分离exoRNA和cfDNA(exoNA)以分析突变情况,并使用BEAMing分析ctDNA与相同样品的现有数据进行对比。

结果显示,联合使用检测激活EGFR突变的灵敏度为98%,检测EGFR T790M的灵敏度为90%。BEAM对ctDNA的敏感性分别为82%,T790M为84%。亚组分析中,对于胸内转移性疾病患者(M0/M1a; n = 21),联合使用进行检测时激活EGFR突变的灵敏度从26%上升到74%(p = 0.003),T790M的灵敏度从19%上升到31%。

综上所述,该研究结果表明,结合exoRNA和ctDNA增加了血浆中EGFR突变检测的敏感性,且在ctDNA循环水平较低的M0/M1a亚组中改善效果最为明显,为仅基于ctDNA的突变检测提供了新的方法。

原始出处:

Krug AK, Enderle D, et al, Improved EGFR mutation detection using combined exosomal RNA and circulating tumor DNA in NSCLC patient plasma. Ann Oncol. 2017 Dec 5. doi: 10.1093/annonc/mdx765.

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    2018-02-24 jklm09
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    2018-08-24 minlingfeng
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    2017-12-09 惠映实验室

    学习了.谢谢.

    0

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4月26日新英格兰医学杂志和Nature分别报道了英国TRACERx肺癌研究计划的第一个成果:肺肿瘤中不稳定的染色体会增加手术后癌症复发的风险,ctDNA的状况可用于检测复发的可能。

WCLC 2017:NSCLC围手术期动态变化——国际前瞻性研究

16日,北京大学人民医院胸外科王俊主任团队的陈克终副教授进行了关于“ 完全切除的非小细胞肺癌患者围手术期循环肿瘤DNA动态变化“的大会口头发言(Oral Presentation),并获得了此次会议的Young Investigators Award,是本届会议唯一获得该奖的中国大陆学者。这也是陈克终医生连续第三年在世界肺癌大会上进行论文口头发言。

N Engl J Med:TRACERx研究揭秘ctDNA系统进化:早期肺癌如何演变?

诸多研究表明肿瘤异质性是导致晚期肿瘤发生耐药、进展的始作俑者。迫于系统性治疗药物的选择压力,肿瘤细胞不断发生基因突变而分化为不同的亚克隆群体。那么,考虑到其形态和基因异质性均较高,早期肺癌的动态血ctDNA会有怎样的基因改变来驱动肿瘤进化以暗度陈仓呢?近期,英国Charles Swanton教授在Nature发表了TRACERx研究(TRAcking non-small cell lung Can

[WCLC2017]胡洁教授深入解读ctDNA检测肿瘤突变负荷(TMB)在中国肺癌免疫治疗中的应用

复旦大学附属中山医院胡洁教授报告了ctDNA检测肿瘤突变负荷(TMB)在中国肺癌免疫治疗中的应用,并引发现场参会医生的踊跃提问。《肿瘤了望》记者在现场特邀胡洁教授对该研究数据进行了深入解读。