携带Egr-1基因调控序列的TK基因的腺病毒载体的构建  

Constructing adenoviral vecter of pAdEgr-1-TK in which TK gene was driven by Egr-1 promoter

作　　者：刘金龙[1] 郭仕英[2] 刘训良[1] 李朝军[2] 杜青[1] 郭治源[1] 夏建国[1] 

机构地区：[1]南京医科大学第一附属医院普外科,江苏南京210029 [2]南京师范大学生命科学学院分子医学实验室,江苏南京210097

出　　处：《南京医科大学学报（自然科学版）》2006年第4期262-264,F0004,共4页Journal of Nanjing Medical University(Natural Sciences)

摘　　要：目的:构建以GFP做标志基因的放射敏感基因Egr-1调控单纯疱疹病毒胸苷激酶基因(herpssimplexvirusthymidinekinase,TK)的腺病毒载体。方法:以PCl-neo-Egr-1-TK(pET)为模板扩增Egr-1,插入到pAdTrack的XbaI和XhoI位点,构建重组质粒pAdTrack/Egr-1;与pET酶切获得TKcDNA相连,构成pAdTrack/Egr-1-TK;用PmeI酶切后与pAdEasy-1混合,应用细菌内同源重组法获得重组表达质粒pAdEgr-1-TK。结果:重组表达质粒pAdEgr-1-TK的酶切鉴定符合预期结果,感染肿瘤细胞可见绿色荧光表达。结论:通过细菌内同源重组成功构建含GFP做标志基因的pAdEgr-1-TK重组表达质粒,为研究Egr-1调控自杀基因及对肿瘤细胞进行灭活打下了基础。Objective：To construct adenoviral vector carrying the TK suicide gene regulated by Egr-1 promoter, containing a green fluorescent protein（GFP） gene incorporated into the adenoviral backbone. Methods：Egr-1 was amplified by polymerase chain reaction from pET.Egr-1 gene was inserted into pAdTrack to construct pAdTrack/Egr-l.pAdTrack/Egr-1 was joined in TKcDNA from pET to construct pAdTrack/Egr-1-TK.Adenoviral vecter of pAdEgr-1-TK was generated through homologous recombination in bacteria. Results：Restriction endonucleases digestion of pAdEgr-1-TK was the same as expected.The green fluorescent was observed in carcinoma cells.Conclusion：The construction of pAdEgr-1-TK is successful,which would benefit the studies on tbe TK suicide gene regulated by irradiation via Egr-1 promoter.

关 键 词：腺病毒载体 EGR-1 TK自杀基因 

分 类 号：R373[医药卫生—病原生物学]