Clin Chem:循环肿瘤细胞中AR-V7, AR-FL, PSA和KRAS位点点突变的原位检测和定量

2018-01-14 AlexYang MedSci原创

液体活检可以在去势难治性前列腺癌(CRPC)中检测雄激素受体剪接变异体7(AR-V7),一种雄激素受体的剪接产物。患有AR-V7阳性循环肿瘤细胞(CTCs)的病人在紫杉烷化疗方面要比新激素治疗效果更好,表明了一种治疗选择性生物标记。同样的,在那些患有胰腺癌(PaCa)的病人中,KRAS变异可以作为预后生物标记。因此,对CTCs的表达和变异情况的调查的技术是迫切需要的。最近,有研究人员报道了将AR-

液体活检可以在去势难治性前列腺癌(CRPC)中检测雄激素受体剪接变异体7(AR-V7),一种雄激素受体的剪接产物。患有AR-V7阳性循环肿瘤细胞(CTCs)的病人在紫杉烷化疗方面要比新激素治疗效果更好,表明了一种治疗选择性生物标记。同样的,在那些患有胰腺癌(PaCa)的病人中,KRAS变异可以作为预后生物标记。因此,对CTCs的表达和变异情况的调查的技术是迫切需要的。最近,有研究人员报道了将AR-V7或者KRAS增加到CTC计数中的一个方法,并且与多重CTC分离平台兼容。

研究人员研究了3个独立的CTC分离设备(CellCollector, Parsortix, CellSearch)来评估CTCs的AR-V7或者KRAS状态,并利用了原位挂锁探针技术。挂锁探针在细胞水平上具有高度的特异性检测和转录本可视化能力。研究发现,原位分析表明了71%(22/31)的CRPC患者具有可检测的AR-V7表达,表达水平从低到高不等(1-76滚环产物/CTC)。在PaCa病人中,40%(6/15)的患者具有KRAS突变表达CTCs,数量为1-8 RCPs/CTC。原位挂锁探针分析表明了CTCs没有可检测到的细胞角蛋白表达,但是AR-V7或者KARS突变转录本上显示阳性。最后,研究人员指出,挂锁探针技术能够对CTCs中的 AR-V7, AR-FL, PSA和KRAS 突变/野生型转录本进行定量,并且该技术在常规实验室中要比多重CTC分离设备更容易应用。

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    2018-01-16 yinhl1978
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    2018-01-15 清风拂面

    谢谢.学习受益匪浅

    0

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    2018-01-15 飛歌

    学习了很有用

    0

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    2018-01-15 情途末路

    学习了.获益匪浅!感谢分享

    0

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