A circulating tumor cell-based digital assay for the detection of EGFR T790M mutation in advanced non-small cell lung cancer.

A circulating tumor cell-based digital assay for the detection of EGFR T790M mutation in advanced non-small cell lung cancer.
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DOI:
10.1039/d0tb00589d
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发表时间:
2020-07-08
期刊:
Journal of materials chemistry. B
影响因子:
--
通讯作者:
Zhu H
Zhu H
中科院分区:
其他
文献类型:
--
作者:
Wang J;Sun N;Lee YT;Ni Y;Koochekpour R;Zhu Y;Tseng HR;Wang S;Jiang L;Zhu H

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确定表皮生长因子受体 (EGFR) T790M 突变的状态对于指导对初始 EGFR 酪氨酸激酶抑制剂 (TKI) 治疗产生获得性耐药的晚期非小细胞肺癌 (NSCLC) 患者的进一步治疗干预至关重要。循环肿瘤细胞 (CTC) 含有大量保存完好的 RNA 副本,为非侵入性检测 NSCLC 中的 T790M 突变提供了理想的来源。我们开发了一种基于 CTC 的数字测定,它协同集成用于富集 NSCLC CTC 的 NanoVelcro 芯片和用于量化富集 CTC 中 T790M 转录物的逆转录液滴数字 PCR (RT-ddPCR)。我们收集了 27 名晚期 NSCLC 患者的 46 份外周动脉和静脉血样本,用于测试这种基于 CTC 的数字化验。结果表明,基于 CTC 的数字检测观察到的 T790M 突变状态与基于组织的诊断方法观察到的相匹配。此外,在外周动脉血中观察到的 T790M 转录本的拷贝数高于在匹配的外周静脉血中检测到的拷贝数。简而言之,我们的结果证明了 NanoVelcro CTC 数字化检测在 NSCLC 中无创检测 T790M 突变的潜力,并表明外周动脉血采样可能比晚期 NSCLC 患者的外周静脉血提供更丰富的 CTC 来源。
Determining the status of epidermal growth factor receptor (EGFR) T790M mutation is crucial for guiding further treatment intervention in advanced non-small cell lung cancer (NSCLC) patients who develop acquired resistance to initial EGFR tyrosine kinase inhibitor (TKI) treatment. Circulating tumor cells (CTCs) which contain plentiful copies of well-preserved RNA offer an ideal source for noninvasive detection of T790M mutation in NSCLC. We developed a CTC-based digital assay which synergistically integrates NanoVelcro Chips for enriching NSCLC CTCs and reverse-transcription droplet digital PCR (RT-ddPCR) for quantifying T790M transcripts in the enriched CTCs. We collected 46 peripheral arterial and venous blood samples from 27 advanced NSCLC patients for testing this CTC-based digital assay. The results showed that the T790M mutational status observed by the CTC-based digital assay matched with those observed by tissue-based diagnostic methods. Furthermore, higher copy numbers of T790M transcripts were observed in peripheral arterial blood than those detected in the matched peripheral venous blood. In short, our results demonstrated the potential of the NanoVelcro CTC-digital assay for noninvasive detection of the T790M mutation in NSCLC, and suggested that peripheral arterial blood sampling may offer a more abundant CTC source than peripheral venous blood in advanced NSCLC patients.
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