Abstract
背景与目的表皮生长因子受体酪氨酸激酶抑制剂(epidermal growth factor receptor tyrosine kinase inhibitors, EGFR-TKIs)是含有EGFR基因敏感突变肺腺癌患者一线治疗首选药物,但其疗效存在个体差异。已有研究表明核因子E2相关因子2(nuclear factor erythroid-2-related factor 2, Nrf2)在肺癌患者中存在个体表达差异,且其与化疗药物疗效相关。Nrf2激活可抑制EGFR-TKIs在EGFR基因突变细胞株中的敏感性。本研究旨在探讨Nrf2在含有EGFR基因突变肺腺癌患者中的表达及其与一线EGFR-TKIs疗效的相关性。方法应用免疫组化检测31例进展期含有EGFR基因突变的肺腺癌患者组织标本中Nrf2的表达。结果含有EGFR基因突变的进展期肺腺癌患者中Nrf2表达存在个体差异,Nrf2阳性率为77.4%,Nrf2核高表达率为38.7%;Nrf2在核内的表达水平与EGFR-TKIs缓解程度、无进展生存期(progression free survival, PFS)相关(P < 0.05),而与性别、年龄、吸烟、分化程度、EGFR基因突变状态和总生存期(Overall survival, OS)无关(P>0.05)。Nrf2阳性程度与PFS和OS显著相关(P < 0.05),Nrf2阳性组中位PFS、OS低于阴性组(P < 0.05)。多因素分析表明Nrf2在肿瘤细胞核内的表达水平是EGFR-TKIs PFS的独立预测因素,Nrf2在肿瘤细胞内的整体阳性程度是OS的独立预测因素(P < 0.05)。结论Nrf2在含有EGFR基因突变的肺腺癌患者中的表达水平与EGFR-TKIs疗效相关,Nrf2可能成为预测EGFR-TKIs疗效的一个理想指标。
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