Sci Transl Med:循环肿瘤DNA甲基化谱有助于结直肠癌的早期诊断及预后预测

2020-01-05 QQY MedSci原创

血液循环肿瘤DNA(ctDNA)的检测是一种非侵入性的检查方法,如果我们知道每种癌症的正确标志物,则可在早期检测出癌症的存在。目前,ctDNA已成为多种癌症有用的诊断和预后生物标志物。现研究人员开展一项研究,以评估ctDNA甲基化标志物用于结直肠癌(CRC)的诊断和预后中的潜在应用,并通过一项前瞻性队列来验证其在筛查高CRC风险的患者中的有效性。研究人员首先通过比较CRC组织和正常血液白细胞来识别

血液循环肿瘤DNA(ctDNA)的检测是一种非侵入性的检查方法,如果我们知道每种癌症的正确标志物,则可在早期检测出癌症的存在。目前,ctDNA已成为多种癌症有用的诊断和预后生物标志物。现研究人员开展一项研究,以评估ctDNA甲基化标志物用于直肠癌(CRC)的诊断和预后中的潜在应用,并通过一项前瞻性队列来验证其在筛查高CRC风险的患者中的有效性。

研究人员首先通过比较CRC组织和正常血液白细胞来识别CRC特异性甲基化特征。然后采用机器学习算法,使用来自801例CRC患者和1021例正常对照组的无细胞DNA (cfDNA)样本,开发了一种预测性的诊断和预后模型。该模型能较准确地将CRC患者与正常对照组患者区分开来。预后预测模型也能有效预测CRC患者的预后和存活期(P<0.001)。此外,研究人员还使用无监督聚类方法建立了一种基于ctDNA的CRC分子分类方法,获得了总存活期具有显著差异的两亚组CRC患者。

最后,在前瞻性队列研究中,研究人员发现一个单独的ctDNA甲基化标记物,cg10673833,在检测的1493位受试者中的高危人群的CRC和癌前病灶中具有高敏感性(89.7%)和特异性(86.8%)。

总而言之,本研究结果展示了ctDNA甲基化标志物在CRC诊断、监测和预后中的价值。

原始出处:

Huiyan Luo, et al.Circulating tumor DNA methylation profiles enable early diagnosis, prognosis prediction, and screening for colorectal cancer.Science Translational Medicine  01 Jan 2020:Vol. 12, Issue 524, eaax7533. DOI: 10.1126/scitranslmed.aax7533

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    2020-01-06 1209e435m98(暂无昵称)

    学习了,谢谢分享

    0

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抗EGFR治疗期间出现RAS突变可能是获得抗EGFR治疗耐药的机制,从而引起人们关注。循环肿瘤(ct)DNA检测是一种确定RAS突变状态的微创且高敏感的方法。CLIN CANCER RES近期发表了一篇文章,研究治疗期间循环肿瘤DNA出现RAS紧急突变对转移性结直肠癌治疗耐药的影响。

CLIN CANCER RES:胃食管腺癌患者循环肿瘤DNA与临床结局之间的关系

食管,胃食管交界和胃腺癌(胃食管腺癌)预后较差,缺乏有效的全身治疗选择CLIN CANCER RES近期发表了一篇文章,通过二代测序(NGS)评估患者血浆中的循环肿瘤DNA(ctDNA),以进一步了解胃食管癌的基因组信息及其临床相关性。