目的:确定尿沉淀细胞DNA中的13个肿瘤相关基因启动子的甲基化谱式分析在膀胱癌诊断中的价值。方法:用定性甲基化特异性(methylation specific polymerase chain reaction,MSP)的方法,对92例临床确诊的膀胱癌患者、23例非肿瘤性尿路疾病患者、6例脑外科患者、7例健康志愿者检测了尿沉淀细胞DNA中肿瘤相关基因启动子的甲基化状态。结果:在临床确诊的92例膀胱癌患者中被检测的13个基因的高甲基化状态出现频率显著高于23例非肿瘤性尿路疾病患者,差异有统计学意义(P<0.05)。而6例脑外科患者和7例正常健康人的尿沉淀细胞DNA中,上述基因均为去甲基化状态。若以任一个基因高甲基化为膀胱癌的指征,88.0%(81/92例)的膀胱癌可被检出。结论:MSP法分析尿沉淀细胞DNA中肿瘤相关基因启动子的甲基化状态可有效地检出膀胱癌。
DNA methylation is the most intensively studied epigenetic phenomenon, disturbances of which result in changes ingene transcription, thus exerting drastic imparts onto biological behaviors of cancer. Both the global demethylation andthe local hypermethylation have been widely reported in all types of tumors, providing both challenges and opportunitiesfor a better understanding and eventually controlling of the malignance. However, we are still in the very early stage ofinformation accumulation concerning the tumor associated changes in DNA methylation pattern. A number of excellentrecent reviews have covered this issue in depth. Therefore, this review will summarize our recent data on DNA methy-lation profiling in cancers. Perspectives for the future direction in this dynamic and exciting field will also be given.
