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新疆哈萨克族食管癌survivin启动子区CpG岛甲基化状态及其临床意义

 玲1,李 卉1,王洪江2,庞作良2,张荣秀3,李惠武1,*   

  1. ( 1. 新疆医科大学基础医学院,乌鲁木齐 830011;2. 新疆医科大学附属肿瘤医院,乌鲁木齐 830011; 3. 新疆医科大学临床医学院,乌鲁木齐 830011 )
  • 收稿日期:2012-06-18 修回日期:2012-10-30 出版日期:2013-01-30 发布日期:2013-01-30
  • 通讯作者: 李惠武
  • 作者简介:刘 玲 (1976- ),女,安徽人,副教授,研究方向:哈萨克族食管癌发病的分子机制。E-mail:147155099@qq.com
  • 基金资助:

    国家自然科学基金项目 (81060172)

The clinical significance and methylation state of survivin promoter CpG island in Kazak's esophageal cancer

LIU Ling1LI Hui1,WANG Hong-jiang2,PANG Zuo-liang2,ZHANG Rong-xiu3,LI Hui-wu1,*   

  1. (1. Preclinical College, Xinjiang Medical University, Urumqi 830011; 2. Affiliated Tumor Hospital, Xinjiang Medical University, Urumqi 830011; 3. Clinical College,Xinjiang Medical University, Urumqi 830011, China)
  • Received:2012-06-18 Revised:2012-10-30 Online:2013-01-30 Published:2013-01-30
  • Contact: LI Hui-wu,E-mail:huiwuli1234@163.com

摘要:

目的: 检测消化道肿瘤早期相关基因survivin mRNA在哈萨克族食管癌组织中的表达及其启动子区CpG岛甲基化状态,并进一步探究survivin启动子甲基化是否参与了食管癌的发生。方法:提取哈萨克族食管癌患者癌组织及远端无癌组织RNA,RT-PCR检测组织中survivin mRNA的表达水平,甲基化特异性PCR (methylation specific PCR,MSP)检测survivin启动子区CpG 岛的甲基化状态。结果:在20对食管癌组织标本中,癌组织中survivin mRNA阳性表达率 (95%)明显高于远端无癌组织 (65%) (P<0.05)。癌组织及远端无癌组织中survivin基因启动子区CpG岛多为杂合型甲基化,且两种组织间甲基化状态无明显差异 (P>0.05)。结论:survivin mRNA表达水平的增高在哈萨克族食管癌的发生、发展过程中起到了一定的作用,但其表达与启动子区CpG岛甲基化无关,提示甲基化并未直接调控该基因的表达并促进哈萨克族食管癌的发生发展。

关键词: 哈萨克族食管癌, survivin, 逆转录PCR, 甲基化特异性PCR, 甲基化

Abstract:

OBJECTIVE: To study the different expressions of survivin gene in esophageal cancer (EC) tissue,then explore their promoter CpG island methylation state,and analyze the change and involvement of promoter methylation on gene expression in Xinjiang Kazak's EC. METHODS:Using RT-PCR to detect the mRNA expression of survivin,and MSP to assess the methylation state of survivin CpG island in promoter region in EC tissues and distal non-cancerous tissues. RESULTS:In the 20 pairs of EC tissues,survivin mRNA positive ratio in EC tissues (95%) was higher than distal non-cancerous tissues (65%) (P<0.05). The methylation of CpG islands were mostly heterozygous type in both EC and non-cancerous tissues,and there were no significant difference between them (P>0.05). CONCLUSION: High expression of survivin was involved in the apoptosis and cell cycle regulation in the development of EC. But the expression display no relation with the CpG methylation state,suggesting that the latter did not regulate survivin expression directly in the development of EC.

Key words: Kazakh’s esophageal carcinoma, survivin;RT-PCR, methylation specific PCR, methylation