非小细胞肺癌患者血清死亡相关蛋白激酶基因启动子甲基化的分析

目的：分析非小细胞肺癌（NSCLC）患者血清中死亡相关蛋白激酶（DAPK）基因启动子区域甲基化的改变状况及其临床意义。方法：运用甲基化特异性PCR技术，检测65例NSCLC组患者血清DAPK基因启动子区域甲基化的改变情况，并分析与临床病理资料的关系。结果：NSCLC组患者血清DAPK基因甲基化检出率为30．8％（20／65），而对照组未检出，DAPK基因甲基化检出率与NSCLC病理类型、分期及转移状态无明显相关性。结论：DAPK基因启动子区域异常甲基化是NSCLC早期辅助诊断的分子标记物之一。

Analysis of promoter hypermethylation of death-asscciated protein kinase gene in blood from non-small cell lung cancer patients

Objective: To analyze the aberrant methylation of death-asscciated protein kinase (DAPK) gene in blood from non-small cell lung cancer (NSCLC) patients and to evaluate its clinical significance. Methods: A methylation-specific PCR was performed for the detection of promoter hypermethylation of DAPK gene in blood DNA from 65 cases of NSCLC patients,and the relation of the aberrant methylation of DAPK gene and the clinical pathological data was analyzed. Results: 30.8% (20/65) of the blood from 65 cases of NSCLC patients showed hypermethylation in DAPK promoter, whereas no methylated DAPK gene promoter was found in blood from normal control or patients with benign lung diseases. DAPK gene promoter methylation in blood did not strongly correlate with the pathological class, stage, metastasis and differentiation of NSCLC. Conclusion: Detection of the aberrant methylation of DAPK gene in blood DNA from NSCLC patients might offer an effective means for the earlier auxiliary diagnosis of the malignancy.