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ANN ONCOL:RAS液体活检与转移性结直肠癌患者结局有关

2018-01-22 MedSci MedSci原创

液体活检是转移性结直肠癌患者肿瘤组织RAS检测的替代方案。但是对于接受一线抗EGFR治疗的患者,液体活检RAS检测的预后效果几乎未见报道。ANN ONCOL近期发表了一篇文章,研究了这一问题。

液体活检是转移性结直肠癌患者肿瘤组织RAS检测的替代方案。但是对于接受一线抗EGFR治疗的患者,液体活检RAS检测的预后效果几乎未见报道。ANN ONCOL近期发表了一篇文章,研究了这一问题。

在CAPRI-GOIM试验中,340例KRAS exon-2野生型转移性结直肠癌患者接受一线西妥昔单抗联合FOLFIRI化疗。对肿瘤标本进行二代测序(NGS)。使用BEAMing方法检测基线血浆样本中的KRAS和NRAS突变状态 。对结果不一致的样本进行ddPCR检测或深度测序。最终共有92例患者的肿瘤样本和基线血浆样本NGS数据可用。在33例患者(35.9%)中肿瘤组织NGS分析和血浆BEAMing检测发现了RAS突变。10例患者为肿瘤组织RAS突变,血浆野生型,还有10例患者为肿瘤组织野生型,血浆突变,最终一致率为78.3%。10例组织突变、血浆野生型的患者中有2例患者的血浆通过ddPCR检测发现RAS突变。在所有的组织野生型、血浆突变患者中,ddPCR或肿瘤组织深度测序均发现等位基因RAS突变的概率在0.15%到1.15%之间。根据组织和液体活检结果确定的RAS突变和野生型患者中位无进展生存时间相似。根据组织和血浆分析确定的RAS突变和野生型患者的中位总生存时间也相似。

文章最后认为,该研究表明接受一线抗EGFR单抗治疗的转移性结直肠癌患者进行液体活检RAS检测与组织检测结局相似。

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    2018-04-19 minlingfeng
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    2018-01-24 smlt2008
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    2018-01-22 139****0239

    henhao

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