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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2017年9月26日,由因合生物、瀚海基因、中南大学湘雅医院、北京大学深圳医院以及深圳市第二人民医院联合举办的“中美ctDNA肿瘤早期筛查技术进展研讨会”在厦门温德姆酒店举行。在该会议上,来自深圳市第二人民医院肿瘤科的田耕教授代表其研究团队向来自全国的临床专家及业界同行展示了利用基于Sec-Seq技术辅助肺癌诊断的让人激动人心的数据。

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

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。

[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。