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山东大学学报(医学版)

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肺腺癌中DNA甲基转移酶1的表达

杨希1,高鹏2,薛玉文1,王妍2,刘文君2,张晓芳2
  

  1. (山东大学齐鲁医院 1. 呼吸内科; 2. 病理科, 济南 250012)
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2009-01-16 发布日期:2009-01-16
  • 通讯作者: 高鹏

Expression of DNA methyltransferase 1(DNMT1)in lung adenocarcinoma and its prognosis significance

YANG Xi1, GAO Peng2, XUE Yuwen1, WANG Yan2, LIU Wenjun2, ZHANG Xiaofang2
  

  1. (1. Department of Respiration, Qilu Hospital of Shandong University, Jinan 250012, China;
    2. Department of Pathology, School of Medicine, Shandong University, Jinan 250012, China)
  • Received:1900-01-01 Revised:1900-01-01 Online:2009-01-16 Published:2009-01-16
  • Contact: GAO Peng

摘要: 目的检测肺腺癌中DNA甲基转移酶1(DNMT1)蛋白水平的表达,探讨其在肺腺癌发生中的作用及其预后价值。方法采用免疫组织化学法检测95例肺腺癌和癌旁正常组织中DNMT1的蛋白表达状况,随访患者并采用SPSS13.0软件进行统计学分析。结果95例肺腺癌中有48例患者呈癌组织DNMT1阳性表达(50.5%),癌旁正常肺组织中DNMT1阴性表达;DNMT1蛋白表达与性别显著相关(P=0.018),女性肺腺癌患者中表达明显增高,与年龄、吸烟、肿瘤大小、淋巴结转移、组织学分级、临床分期之间的相关性差异无统计学意义(P>0.05)。肺腺癌患者总生存率、2年生存率和无病生存率在DNMT1的蛋白表达阳性率为31.91%、65.07%、26.85%,阴性率为62.88%、83.01%、48.65%。 Kaplan Meier法和LogRank法分析显示,DNMT1蛋白阳性表达是肺腺癌患者预后差的标志(P<0.05)。结论肺腺癌早期DNMT1蛋白可能高表达,在其发生发展中起着重要的作用并与患者的预后密切相关,可以作为检测早期肺腺癌的分子标志物及肺腺癌患者预后不良的指标。

关键词: DNA甲基化, 肺肿瘤, 预后

Abstract: To explore the role of protein expression of DNA methyltransferase 1 (DNMT1) in lung adenocarcinoma carcinogenesis and prognosis. MethodsDNMT1 protein expression levels in 95 tumor specimens and adjacent normal tissues were determined by immunohistochemistry. Comparisons of the survival rate and recurrence between positive and negative DNMT1 were conducted with SPSS13.0 software. ResultsNone of the 95 noncancerous tissues exhibited DNMT1 immunoreactivity, whereas 48 (50.5%) of the 95 lung adenocarcinoma cancerous tissues were DNMT1positive. There was a significant correlation between DNMT1 overexpression and gender (P=0.018), which was much more obvious in females. No correlation was found between DNMT1 expression and patient age, smoking, lymph node metastasis, tumor types and clinical stages (P>0.05). In addition, general survival rate, 2year survival rate and diseasefree rate in patients with DNMT1positive were 31.91%, 65.07% and 48.65% respectively, while in patients with DNMT1negative they were 62.88%, 83.01% and 26.85%. DNMT1 protein overexpression served as a marker of poor prognosis by KaplanMeier and LogRank analysis(P<0.05). ConclusionDNMT1 overexpression is an early event of lung adenocarcinoma carcinogenesis and plays a significant role in the development of lung adenocarcinoma. It may serve as a molecule marker to detect lung adenocacinoma in an early stage and an indicator of unfavourable prognosis.

Key words: DNA methylation, Lung neoplasms, Prognosis

中图分类号: 

  • R734.2
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