JAMA Oncology:循环肿瘤DNA有望预测结直肠癌的复发

2019-05-29 佚名 生物通

两个独立的研究团队近日发现,利用循环肿瘤DNA(ctDNA)可预测非转移性结直肠癌的预后和复发。这些研究成果于本周发表在《JAMA Oncology》杂志上。

两个独立的研究团队近日发现,利用循环肿瘤DNA(ctDNA)可预测非转移性直肠癌的预后和复发。这些研究成果于本周发表在《JAMA Oncology》杂志上。



在第一项研究中,美国、澳大利亚以及瑞典的研究人员关注了58名在瑞典医院接受过切除手术的I/II/III期直肠癌患者,在其手术后几个月到几年内采集了300多份血液样本。他们利用Safe-SeqS分析搜索已知的肿瘤突变,发现13名患者的ctDNA呈阳性。

研究人员随后发现,在13名手术后出现ctDNA的患者中,10名患者出现了疾病复发,这表明在手术切除肿瘤后开展ctDNA检测的潜在益处。平均而言,从血液中发现ctDNA比医生观察到临床症状要早三个月。在剩下45名无ctDNA的患者中,研究人员平均随访4年未发现疾病复发。

研究人员认为,尽管这些结果还有待更大规模前瞻性试验的验证,但在术后监测期间对结直肠癌患者进行循环肿瘤DNA的检测,可以根据复发风险对其进行分层。

在另一项研究中,奥胡斯大学医院、Natera等机构的研究人员利用超深度测序来定量近800个样本中的ctDNA水平。这些样本来自125名患有I/II/III期结直肠癌的患者,是在手术前两周和手术后几个月内采集的。同样,ctDNA的存在似乎与疾病复发一致。

研究人员发现,ctDNA是结直肠癌复发的独立风险因素。例如,对于手术前检测的122名患者,他们在108名患者的样本中检测到ctDNA,包括40%的I期患者、92%的II期患者和90%的III期患者。他们指出,手术后ctDNA的再次出现与疾病的复发密切相关,通常比标准影像学检查更早发现。

研究人员指出,若在手术后第一个月,患者的血液中就出现ctDNA,那么其复发风险尤其高。根据这些研究结果,他们得出结论,通过ctDNA分析可实现风险分层、化疗监测和早期复发检测,从而改变结直肠癌的术后管理

在同期发表的一篇社论中,MD安德森癌症中心的Scott Kopetz等人讨论了结直肠癌的研究成果,并指出它们“扩展了我们对ctDNA临床作用的认识,并且在未来获得更多前瞻性试验的数据后,ctDNA有望作为生物标志物用于结直肠癌的常规监测,以确定那些有望从化疗中受益的患者”。

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    2019-10-07 minlingfeng
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    2019-06-01 yjs木玉

    好好好好好好

    0

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    2019-05-29 深海的鱼

    学习学习学习

    0

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    2019-05-29 txqjm

    谢谢了,学习

    0

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