GUT:在循环无细胞DNA中的5-羟甲基胞嘧啶全基因组测序是一种无创的肝癌早期检测方法

2019-07-31 不详 MedSci原创

背景缺乏高灵敏度和特异性的诊断性生物标志是肝细胞癌患者预后不佳的主要原因。研究人员试图通过循环无细胞DNA(cfDNA)找到一种非侵入性诊断方法。方法应用5hmC- seal技术,研究人员从2554名中国受试者的cfDNA样本中获得了全基因组的5-羟甲基胞嘧啶(5hmC),其中包括1204例HCC患者,392例慢性乙型肝炎病毒感染(CHB)或肝硬化(LC)患者,958例健康个体和良性肝损害患者。通

背景
缺乏高灵敏度和特异性的诊断性生物标志是肝细胞癌患者预后不佳的主要原因。研究人员试图通过循环无细胞DNA(cfDNA)找到一种非侵入性诊断方法。

方法
应用5hmC- seal技术,研究人员从2554名中国受试者的cfDNA样本中获得了全基因组的5-羟甲基胞嘧啶(5hmC),其中包括1204例HCC患者,392例慢性乙型肝炎病毒感染(CHB)或肝硬化(LC)患者,958例健康个体和良性肝损害患者。通过病例对照分析,采用弹性网正则化进行特征选择,建立早期HCC的诊断模型。

结果
研究人员开发了一个32个基因的诊断模型,能够区分基于巴塞罗那临床肝癌分期系统的早期肝细胞癌(0/A期)和非肝细胞癌(验证集:曲线下面积(AUC)=88.4%;(95%CI 85.8%-91.1%)),优于甲胎蛋白这个生化指标。5hmC模型除了能从非HCC中检测早期或小肿瘤(如≤2.0 cm)患者外,还能较好地从有CHB或LC病史的高风险受试者中分辨早期HCC(AUC=84.6%; (95% CI 80.6% - 88.7%)),表现同样优于甲胎蛋白。此外,5hmC模型似乎独立于潜在的混杂因素(如烟酒史)。

结论
研究人员认为这是一种具有临床应用潜力的无创方法,可用于在高危人群中发现早期仍可手术切除的HCC。

原始出处:Genome-wide mapping of 5-hydroxymethylcytosines in circulating cell-free DNA as a non-invasive approach for early detection of hepatocellular carcinoma ,doi: 10.1136/gutjnl-2019-318882

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    2019-07-31 留走人康

    肝癌,接下来就要细分了,对于体质好的病人,能否将PD-1类+抗血管新生+放疗等相结合,甚至有必要用TACE进行减负

    0

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