胶质瘤中miR-34a靶向作用于MAPK13 mRNA并抑制其表达  

MiR-34a directly targets mRNA of MAPK13 and inhibits its expression in glioma

作　　者：王亮[1] 黄凯[1] 刘晓智[1] 李罡[1] 苏治国[1] 王骏飞[1] 赵玉军[1] 刘洪良[1] 陈镭[1] 

机构地区：[1]天津市第五中心医院,天津300450

出　　处：《山东医药》2011年第48期19-21,118,共4页Shandong Medical Journal

基　　金：天津市应用基础及前沿技术研究计划(09JCYBJC09500)

摘　　要：目的预测并验证miR-34a与促分裂原活化蛋白激酶13(MAPK13)的靶向作用关系,寻找胶质瘤基因治疗的新方法。方法将miR-34a相似物转染入胶质瘤细胞A172中,实时定量PCR检测miR-34a在胶质瘤中的表达。目的基因的mRNA水平用实时定量PCR来评估,蛋白水平分别用荧光素酶试验和蛋白印迹来评估。miR-34a与目的基因3'非翻译区(3'UTR)的结合用MAPK13报告实验确认。结果 miR-34a相似物转染入胶质瘤细胞A172后在A172细胞中大量表达,实时定量PCR、蛋白印迹和免疫荧光证明miR-34a降低MAPK13的表达量,MAPK13荧光素酶报告实验显示,MAPK13荧光素酶活性被miR-34a降低。结论 miR-34a通过与MAPK13 3'UTR区的特异结合作用发挥对胶质瘤责任基因MAPK13的靶向沉默作用,可能成为未来胶质瘤基因治疗的新选择。Objctive To predict and verify whether miR-34a directly targerts mitogen-activated protein kinase 13 （MAPK13） and to find new ways for glioma gene therapy. Methods Human glioma cell line A172 was transfected with miR-34a mimics. Real-time PCR was used to detect its expression in glioma cell. Potential target gene expression was assessed by Western bl0t and immunofluorescence for proteins, and by quantitative real-time PCR for mRNAs. The binding between miR-34a and 3′ UTR of MAPK13 was validated using 3′ UTR reporter assay. Results After transfecting miR-34a mimics into human glioma cell line A172, miR-34 was largely expressed in A172. Real-time PCR, immunofluorescence and Wstern blot showed that miR-34a reduced the expression of target gene MAPK13. 3′ UTR reporter assay showed that the luciferase activity of MAPK13 was inhibited by naiR-34a. Conclusion MiR-34a silencing MAPK13 by directly binding to 3′ UTR of MAPK13 may become a new strategy for future glioma gene therapy.

关 键 词：微小RNA-34a 丝裂原活化蛋白激酶13 神经胶质瘤 基因治疗 

分 类 号：R730.54[医药卫生—肿瘤]