[关键词]
[摘要]
目的: 探讨内蒙古地区RASSF 1A、P16、DAPK、
RUNX 3 基因甲基化在非小细胞肺癌( nonsmall cell
lung cancer,NSCLC) 早期诊断及判断预后之间的关系。方法: 应用甲基化特异性PCR( ( methlation specific PCRMSP) 方法检测50 例NSCLC 病人和50 例健康人群外周血、30 例NSCLC 癌组织和30 例癌旁正常组织中RASSF
1A、P16、DAPK、RUNX 3 基因启动子区的甲基化率,分析NSCLC 病人与健康人群甲基化水平的差异,癌组织、癌
旁组织及外周血中各基因甲基化水平的差异,并分析年龄、性别、吸烟史、组织学类型及临床分期对基因启动子
区甲基化率的影响。结果: 肺癌组织中RASSF 1A、P16、DAPK 和RUNX 3 基因启动子区甲基化检出率分别为
66. 67%( 20 /30) 、56. 67%( 17 /30) 、63. 33%( 19 /30) 和56. 67%( 17 /30) ; 其对应的血浆标本中这4 个基因的甲基
化检出率分别为60. 00%( 30 /50) 、44. 00% ( 22 /50) 、60. 00% ( 30 /50) 和42. 00% ( 21 /50) ,两组标本甲基化检出
率存在着较好的一致性( P > 0. 05) 。30 例癌旁正常组织标本和50 例健康人群血浆标本均未检测出基因甲基
化,与肺癌组比较差异有统计学意义( P < 0. 05) 。RASSFIA 基因启动子区甲基化检出率与病人分化程度、淋巴
结转移有关( P < 0. 05) ; P16 基因启动子区甲基化检出率与病人临床分期有关( P < 0. 05) ;RUNX 3 基因启动子
甲基化与病人临床分期、分化程度、淋巴结转移有关( P < 0. 05) 。结论: RASSF 1A、P16、DAPK、RUNX 3 基因启动
子区的甲基化与NSCLC 有关,检测外周血中RASSF 1A、P16、DAPK、RUNX 3 基因启动子区甲基化水平可能有助
于NSCLC 的早期预警、早期诊断与判断预后。
[Key word]
[Abstract]
Objective: To investigate the mechanism of promoter methylation status of genes ras association
domain family 1A( RASSF 1A) ,P16,death associated protein kinase( DAPK) and RUNX 3 in
the development of non - small - cell lung cancer. Methods: The blood samples of 50 lung cancer patients
and 50 normal controls, the tumor tissue of 30 non - small - cell lung cancer patients and 30 pefi-
cancerous tissues were collected to determine the methylation levels of RASSF 1A,P16,DAPK and
RUNX 3 using methlation specific PCR. Results: The positive rates of methylation of RASSF 1A,P16,
DAPK and RUNX 3 genes in non - small - cell lung cancer tissues were 66. 67% ( 20 /30) ,56. 67%
( 17 /30) ,63. 33% ( 19 /30) and 56. 67% ( 17 /30) , respectively; and the positive rates in the corresponding
plasma were 60. 00%( 30 /50) , 44. 00%( 22 /50) , 60. 00%( 30 /50) and 42. 00% ( 21 /50) ,
respectively. The positive rates of promoter methylation in the two samples were coincident( P > 0. 05) .
The promoter methylation of RASSF 1A,P16,DAPK and RUNX 3 gene was not seen both in plasma
and peficancerous tissues( 0. 00%) . There was a significant difference between the lung cancer group
and lung benign lesion group( P < 0. 05) . The positive rates of promoter methylation of RASSF 1A was
related to cell differentiation and lymphatic metastasis( P < 0. 05) ; The positive rates of promoter methylation
of P16 was related to clinical stage( P < 0. 05) ; The positive rates of promoter methylation of
RUNX 3 was related to clinical stage,cell differentiation and lymphatic metastasis. Conclusion: The aberrant
promoter methylation of RASSF 1A,P16,DAPK and RUNX 3 were related to non - small - cell
lung cancer. To detect RASSF 1A,P16,DAPK and RUNX 3 gene aberrant promoter methylation levels
may Contribute to early warning of NSCLC and the prediction of non - small - cell lung cancer risk,
early diagnosis and estimate prognosis.
[中图分类号]
R734. 2
[基金项目]
收稿日期: 2015 - 11 - 28; 修回日期: 2016 - 02 - 20
基金项目: 内蒙古自治区科技计划项目( 20120403)
作者简介: 王培培( 1992 - ) ,女,内蒙古医科大学2013 级在读硕士研究生。
通讯作者: 张翠英,主任医师,硕士研究生导师,E - mail: cenyao_2006@ 126. com 内蒙古自治区人民医院肿瘤中
心, 010021