应用BSP联合TA克隆测序检测胰腺癌中RASSF1A基因启动子区异常甲基化
DOI:
作者:
作者单位:

作者简介:

通讯作者:

中图分类号:

基金项目:

江苏省2010年度留学人员科技活动项目


The abnormal methylation of RASSF1A in pancreatic cancer detected by bisulfite genomic sequencing PCR combined TA clone sequencing technology
Author:
Affiliation:

Fund Project:

  • 摘要
  • |
  • 图/表
  • |
  • 访问统计
  • |
  • 参考文献
  • |
  • 相似文献
  • |
  • 引证文献
  • |
  • 资源附件
  • |
  • 文章评论
    摘要:

    目的:检测Ras相关区域家族1A(Ras association domain family 1A,RASSF1A)在胰腺癌细胞株中的甲基化和表达状态,探讨其启动子异常甲基化在胰腺癌发病过程中的作用-方法:采用重亚硫酸盐测序PCR(bisulfite genomic sequencing PCR,BSP)联合TA克隆测序检测胰腺癌细胞株PANC-1及胰腺癌组织-癌旁组织及正常胰腺组织中RASSF1A启动子区CpG岛的甲基化状态,以甲基化酶抑制剂5-aza-2-deoxycitydine(5-aza-dC)处理PANC-1,观察处理前后甲基化率变化情况,逆转录PCR观察RASSF1A 的mRNA表达情况-结果:在PANC-1细胞中RASSF1A启动子的甲基化率平均为100.00%,在正常胰腺-癌旁及癌组织中平均分别为1.79%-93.75%和100.00%,与正常胰腺组织相比,胰腺癌旁及癌组织的RASSF1A启动子甲基化率明显增高(P < 0.01),而癌旁及癌组织之间无明显差异(P > 0.05)-在PANC-1细胞-胰腺癌组织及癌旁组织中RASSF1A基因无表达,在正常胰腺组织中RASSF1A基因呈阳性表达;PANC-1细胞经5-aza-dC处理后,RASSF1A的甲基化率下降(88.89%,P < 0.05),mRNA表达无变化-结论:胰腺癌细胞株PANC-1及癌组织-癌旁组织RASSF1A基因表达与启动子区甲基化状态有关,启动子区的高甲基化导致PANC-1中RASSF1A基因的表达沉默-该基因异常甲基化有望成为胰腺癌的早期诊断指标和治疗靶点-

    Abstract:

    Objective:To explore the methylation status and expression of Ras association domain family 1A (RASSF1A),and the possible effect between promoter aberrant methylation and the pathogenesis of pancreatic cancer. Methods: We detected the methylation status of RASSF1A promoter CpG island (CGI) in pancreatic cancer cell line PANC-1,normal pancreatic tissue and 1 pairs of pancreatic tissues(cancer and para-cancerous tissue) by using bisulfite genomic sequencing PCR (BSP) combined with TA clone for sequencing. The methylation rate of RASSF1A in PANC-1 was compared before and after treatment of the inhibitor of DNA methyltransferase (5-aza-2-deoxycitydine,5-aza-dC),and reverse transcription PCR(RT-PCR) were used to explore mRNA expression of the RASSF1A gene. Results:The average methylation rate of RASSF1A promoter CGI was 100.00% in PANC-1,1.79% in normal pancreas,93.75% in para-cancerous tissues,and 100.00% in cancer tissues. The methylation rate of para-cancerous or cancer tissue was higher than that of normal pancreas(P < 0.01),but there was no significant difference between para-cancerous tissues and cancer tissues(P > 0.05). After the treatment of 5-aza-dC,the methylation rate in PANC-1 was decreased to 88.89%(P < 0.05),but the mRNA of RASSF1A had no change. Conclusion: This promoter hypemlethylation is correlated with RASSF1A gene expression in pancreatic cancer cell line PANC-1 and pancreatic tissues,and plays a key role in RASSF1A silencing. Aberrant hypermethylation of RASSF1A could probably become early diagnosis index and treatment target of pancreatic cancer.

    参考文献
    相似文献
    引证文献
引用本文

彭 泉,张立洁,蔡辉华,高文涛,赵成功,钱祝银,苗 毅.应用BSP联合TA克隆测序检测胰腺癌中RASSF1A基因启动子区异常甲基化[J].南京医科大学学报(自然科学版),2012,(1):72-76

复制
分享
文章指标
  • 点击次数:
  • 下载次数:
  • HTML阅读次数:
  • 引用次数:
历史
  • 收稿日期:2011-07-07
  • 最后修改日期:
  • 录用日期:
  • 在线发布日期:
  • 出版日期:
通知关闭
郑重声明