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循环肿瘤细胞联合CEA、CA19-9检测在结直肠癌患者中的临床价值

欧 阳航, 吴 一波, 蒋 燕成, 陈 紫萱, 吴 聪莲, 张 志珊

摘要

目的 研究CTC联合癌胚抗原(carcinoembryonic antigen,CEA)与CA19-9对结直肠癌患者的诊断价值及CTC与患者临床特征的关系。方法 收集结直肠癌病例组115例及健康对照组20例。CTC的富集与鉴定采用差相-免疫荧光原位杂交法(subtraction enrichment and immunostaining-fluorescence in situ hybridization,SE-iFISH),血清中CEA与CA19-9采用化学发光法检测。统计学方法采用卡方检验、二项逻辑回归建立模型进行受试者工作曲线(ROC)分析。结果 结直肠癌组患者CTC阳性率为87.8%(101/115),显著高于健康对照组的10%(2/20)(χ2=52.837,P<0.001)。CTC、CEA与CA19-9三者的检测灵敏度分别为87.8%、28.7%和26.0%。CTC检测时的受试者工作特征(receiver operating characteristic,ROC)曲线下面积(area under curve,AUC)为0.889,高于单独检测CEA时的0.643(Z=5.868,P<0.0001)以及CA19-9时的0.605(Z=5.512,P<0.0001)。CTC联合CA19-9检测时,灵敏度达到最高的92.2%,AUC面积达到0.917,比单独检测CTC时有更高的诊断效能(Z=2.550,P<0.05)。CTC与患者肿瘤分期和淋巴结转移有关(P<0.05),与性别、年龄、癌变部位以及分化程度无关。结论 CTC联合CA19-9有助于进一步提高诊断效能,在结直肠癌诊断中有较高的临床应用价值。CTC的存在可能与淋巴结转移及TNM分期相关。

关键词

结直肠癌;循环肿瘤细胞;癌胚抗原;糖链抗原19-9

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参考

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