Abstract

背景与目的巨噬细胞抑制因子-1(macrophage inhibitory cytokine-1, MIC-1)是人转化生长因子β(transforming growth factor-β, TGF-β)超家族中重要成员,研究发现MIC-1表达水平在多种上皮来源肿瘤患者血清中均有显著升高。本研究旨在探讨MIC-1在早期非小细胞肺癌(non-small cell lung cancer, NSCLC)诊断及其与临床病理特征间的关系,以及与术后复发/转移及预后的相关性。方法采用酶联免疫吸附试验(enzymelinked immunosorbent assay, ELISA)方法检测152例早期肺癌、48例肺良性疾病患者及105例正常对照人群血清MIC-1浓度,分析MIC-1诊断肺癌中的作用,同时分析血清MIC-1浓度与临床病理特征、复发/转移及预后的相关性。结果早期肺癌患者组MIC-1血清水平高于正常对照组(P < 0.001)和肺良性疾病组(P < 0.001),设1, 000 pg/mL为诊断肺癌的临界值,MIC-1检测肺癌的敏感性和特异性分别为70.4%和99.0% [曲线下面积(area under curve, AUC): 0.90;95%CI: 0.87-0.94];MIC-1血清水平与年龄(P=0.001)、性别(P=0.03)有关,病理TNM分期T2的患者MIC-1血清水平高于T1患者(P=0.022);血清MIC-1 > 1, 465 pg/mL组的患者3年生存率为77.6%,低于血清MIC-1 < 1, 465 pg/mL组的患者94.8%(P=0.022),Cox回归多因素分析结果显示,血清MIC-1 > 1, 465 pg/mL是Ⅰ期、Ⅱ期NSCLC独立的预后因素(HR=3.37, 95%CI: 1.09-10.42, P=0.035)。结论MIC-1作为血清肿瘤生物标志物,可能有助于提高肺癌早期诊断。MIC-1的检测对判断Ⅰ期、Ⅱ期NSCLC患者预后有预测价值,可能为其独立的预后指标。

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