是什么又让血液检测登上Nature Medicine?

2016-11-24 佚名 检验视界网

本周发表在Nature Medicine杂志上的一项新研究表明,血液检测能预测小细胞肺癌患者对治疗有何反应。大多数的小细胞肺癌患者在治疗初期产生化疗敏感性,但随后病情会再度恶化。对于少数患者,治疗不到3个月就会出现恶化,这种情况也被称为耐药性。然而,目前区分化疗敏感性和化疗耐药性的分子机制仍是未知的。为了确定化疗敏感性和化疗耐药性的遗传特征,曼彻斯特大学癌症研究中心的科学家从31位侵袭性小细胞肺癌

本周发表在Nature Medicine杂志上的一项新研究表明,血液检测能预测小细胞肺癌患者对治疗有何反应。



大多数的小细胞肺癌患者在治疗初期产生化疗敏感性,但随后病情会再度恶化。对于少数患者,治疗不到3个月就会出现恶化,这种情况也被称为耐药性。然而,目前区分化疗敏感性和化疗耐药性的分子机制仍是未知的。


为了确定化疗敏感性和化疗耐药性的遗传特征,曼彻斯特大学癌症研究中心的科学家从31位侵袭性小细胞肺癌患者的血液中分离出了循环肿瘤细胞(CTCs),并仔细调查了这些细胞的拷贝数变异(CNAs)。


研究小组还调查了最初对治疗有良好反应但后来再度恶化的患者的遗传变化。他们发现这类患者的CNAs不同于那些对治疗未出现任何良好反应的患者,这表明了他们耐药机制的发展不同,也意味着初始耐药性和获得性耐药性的遗传基础不同。研究人员认为,治疗前就存在的遗传缺陷与患者对化疗反应有直接的关联。


通过手术来获取患者的肿瘤样本比较困难。除了肿瘤样本自身难以获取之外,样本还往往太小,以至于不能提供有用的线索来预测如何才能更好的治疗。液体活检提供了另一种手段来获取肿瘤样本,并通过血液样本来捕获疾病的遗传特征。


本研究的首席研究员 Caroline Dive教授表示,“这项研究揭示了如何用血液样本来预测肺癌患者对治疗的反应。遗憾的是,小细胞肺癌治疗方案很少,因而可选择性也很窄,且对于那些对化疗产生耐药性的患者我们更是不知所措。通过识别患者之间遗传缺陷的差异,如今我们有了一个新的起点来了解肺癌患者耐药性是如何发展的。”


英国癌症研究所科技信息部管理者Emma Smith说,“肺癌是英国五大死亡率最高的癌症之一,开发新疗法挽救更多的生命十分重要。液体活检是一个令人兴奋的研究领域,它有助于捕获更多的疾病特征,为开发新疗法指明方向,这也是肺癌患者的迫切需求。”

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    2017-05-25 kalseyzl
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    2017-05-25 liye789132251
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    2017-02-28 jeanqiuqiu
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    2016-11-25 ann y

    通过手术来获取患者的肿瘤样本比较困难。除了肿瘤样本自身难以获取之外,样本还往往太小,以至于不能提供有用的线索来预测如何才能更好的治疗。

    0

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