Nat Med:CTC成功预测化疗耐药性

2017-03-13 佚名 肿瘤捕手

近期,在影响因子30.4的《Nature Medicine》杂志上,英国曼彻斯特大学的科学家发表了一项期待已久的研究成果:采用CTC(循环肿瘤细胞)单细胞测序的方法成功预测了肺癌的化疗有效性。 小细胞肺癌由于肿瘤活检和 ...


近期,在影响因子30.4的《Nature Medicine》杂志上,英国曼彻斯特大学的科学家发表了一项期待已久的研究成果:采用CTC(循环肿瘤细胞)单细胞测序的方法成功预测了肺癌的化疗有效性。

小细胞肺癌由于肿瘤活检和细胞学上的困难,其耐药性研究一直难以突破,而基于CTC测序技术则能够很好的预测其耐药性。

科学家发现有些患者对于化疗药物具有耐受性,而另一些患者是对药物敏感的(药物敏感的患者比药物耐受的患者治疗效果更好)。

因为每个人的肿瘤特性是具有”个体性“的,因此医生并不知道哪个个体对于药物有效。而通过CTC,我们能发现这种化疗耐受/敏感型是跟基因拷贝数异常相关。因此这一发现具有极其重要的临床意义。

正常细胞每个基因应该有2个拷贝,而肿瘤细胞某些基因会出现数目异常。该研究先是从13名小细胞肺癌患者中分离出的88个CTC细胞上检测到基因拷贝数畸变(CNA),这是基于CTC中的CNA产生一个分类器。而后科学家在18名患者上测试这一分类器,针对这18名患者的112个CTC细胞,和6个患者CTC来源的衍生肿瘤外植体(CDX)进行测试后,发现分类器的准确度达到83.3%。从而开发出了基于CTC的分子诊断方法,可判断出患者是否是化疗敏感或者耐受。

同时,科学家还发现,这些依照化疗耐药性不同分类的患者,无进展生存期(PFS)(Kaplan-Meier, P= 0.0166)中观察到显着差异。



因此通过基于CTC的测序方法,可以做到肿瘤患者化疗耐药性的预测性。

本研究最直接的意义是:首次,在化疗之前,利用CTC预测了患患者的化疗敏感性。这一工作是具有历史开创性意义的,我们可可以按照这一研究思路为小细胞肺癌以及其他癌症的患者,进行行更为精确的分子/细胞分类,对于临床实验的患者分层,充分分体现精准医学与4P医学(预测性、预防性、个体性、参与性——Leroy Hood,美国科学院院士)的价值。

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    2017-12-30 liye789132251
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    2017-05-05 kalseyzl
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    2017-03-14 刘煜

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