Nat Med:血液中的循环肿瘤细胞可以预测肺癌治疗效果

2016-11-23 生物通 叶予 生物通 叶予

肺癌是全世界发病率和死亡率最高的癌症之一。肺癌主要分为小细胞肺癌和非小细胞肺癌两大类。不同类型的肺癌,治疗策略和预后情况也不尽相同。Nature Medicine发表的一项新研究表明,血检可以预测小细胞肺癌(SCLC)患者对治疗的应答情况。在癌症的发展过程中,肿瘤细胞会离开实体瘤进入血液循环,成为循环肿瘤细胞(CTC)。曼彻斯特大学的研究人员从31名小细胞肺癌患者的血液中分离循环肿瘤细胞进行研究。

肺癌是全世界发病率和死亡率最高的癌症之一。肺癌主要分为小细胞肺癌和非小细胞肺癌两大类。不同类型的肺癌,治疗策略和预后情况也不尽相同。Nature Medicine发表的一项新研究表明,血检可以预测小细胞肺癌(SCLC)患者对治疗的应答情况。


在癌症的发展过程中,肿瘤细胞会离开实体瘤进入血液循环,成为循环肿瘤细胞(CTC)。曼彻斯特大学的研究人员从31名小细胞肺癌患者的血液中分离循环肿瘤细胞进行研究。他们发现,治疗前循环肿瘤细胞的基因缺陷模式与患者对化疗的应答情况有关。  

通过手术获取肺癌患者的肿瘤样本是比较困难的。肺部肿瘤很难触及,样本往往又太小,提供不了多少有用的治疗线索。而液体活检为人们提供了从血液样本获取肿瘤信息的新途径。  

有些SCLC患者原本响应了药物治疗,但后来又出现癌症复发。研究人员分析了这些患者发生的遗传学改变。研究显示,癌症复发患者的基因缺陷模式不同于那些不响应化疗的患者,说明他们对药物产生抗性的机制并不相同。研究人员指出,鉴定患者之间基因缺陷模式的差异,有助于进一步理解这种侵袭性的肺癌。  

与单个循环肿瘤细胞(CTC)相比,CTC群可以更有效的在机体内扩散。过去人们普遍认为CTC群太大,无法穿过狭窄的毛细血管。麻省总医院(MGH)的研究人员在美国国家科学院院刊PNAS杂志上发表文章反驳了这一观点,并且提出了降低CTC群转移能力的新策略。

美国西北大学的科学家们开发了一个检测血液CTC的简便工具,NanoFlare。NanoFlare是首个能在复杂基质(血液)中检测循环肿瘤细胞的遗传学方法。这个微小的核酸球具有金纳米颗粒核心和单链DNA“照明弹”。即使只有痕量的靶标存在,NanoFlare也能进入并点亮细胞。

前列腺肿瘤很容易转移到骨组织,这样的转移很难用传统方法进行检测。Broad研究所的科学家们在Nature Biotechnology杂志上发表文章,描述了一个模块化的新技术平台。该平台可以收集前列腺癌患者血液中的CTC,对其进行外显子组测序和分析,揭示高度可信的单核苷酸突变。

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    2017-06-10 liye789132251
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    2016-11-23 susice

    有开发应用前景

    0

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    2016-11-23 1771ae4158m

    学习了,很好

    0

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