含绿色荧光蛋白报告基因的TIMP-2真核表达载体的构建及其在人成釉细胞瘤中的表达  

The construction and expression of PcDNA3.1(+)/GFP-TIMP-2 in human ameloblastoma cell

作　　者：黄洪章[1] 张磊涛[1] 曾东林[1] 张彬[1] 

机构地区：[1]中山大学附属第二医院口腔颌面外科,广州510120

出　　处：《中华口腔医学杂志》2006年第12期713-714,共2页Chinese Journal of Stomatology

基　　金：国家自然科学基金资助项目(30471896)

摘　　要：目的构建含有绿色荧光蛋白报告基因(GFP)的TIMP-2真核表达载体PcDNA3·1(+)/GFP-TIMP-2,并探讨其在成釉细胞瘤(AB)中的表达情况。方法应用RT-PCR技术从体外培养的人AB中获得TIMP-2目的基因片段,采用分子克隆技术构建该基因的真核表达载体PcDNA3·1(+)/GFP-TIMP-2,并以脂质体为介导转染至体外培养的人AB细胞。流式细胞仪测定转染效率,倒置相差荧光显微镜观察绿色荧光,RT-PCR检测转染前后TIMP-2mRNA的表达量的改变。结果构建的PcDNA3·1(+)/GFP-TIMP-2经酶切和测序鉴定证明和预期结果一致。PcDNA3·1(+)-TIMP-2转染人AM细胞后TIMP-2mRNA的表达量增加。结论成功构建TIMP-2真核表达载体PcDNA3·1(+)/GFP-TIMP-2并转染至人AB细胞。Objective To construct the eukaryotic expression vector of TIMP-2 gene and to explore its expression in human ameloblastoma cell in vitro. Methods The aimed gene fragment was obtained by RT-PCR. And then, molecμlar cloning technology and enzyme digestion were used to connect the gene with the plasmid PcDNA3, 1 （ ＋ ） , which can be expressed in eukaryotic cells and a report gene ： green fluorescent protein gene （GFP） was already existed in the plasmid. We named the eukaryotic expression vector, which contended our aimed gene TIMP-2 as well as report gene GFP, PcDNA3. 1 （ ＋ ）/GFP-TIMP-2. The vector was identified by PCR analysis, EcoR I and Xho I restriction analysis and Sequence analysis. After the PcDNA3. 1 （ ＋ ）/GFP-TIMP-2 was transfected into cμltured human ameloblastoma cell, RT-PCR and Flow Cytometry（FCM） and Microscope wre respectively performed to evaluate the effect of transfection and expression. Results The constructed vector PcDNA3.1 （ ＋ ）/GFP-TIMP-2 was proved correct by enzyme digestion and sequencing analysis. After PcDNA3.1 （ ＋ ）/GFP-TIMP-2 was trasnfected into cultured human ameloblastoma cell , the rate of transfection is 47.6% （ Analysis report of FCM） , the green fluorescence was found in plasm （ observed with fluo-mierowave）, the expression of TIMP-2 mRNA was elevated 2.4 times compared with the control group. Conclusions PcDNA3. 1（ ＋ ）/GFP-TIMP-2 was successfully constructed and it coμld be transfected into cultured human ameloblastoma cell. It may be benefit to further study of the relationship between the TIMP-2 gene and the behaviour of ameloblastoma.

关 键 词：成釉细胞瘤 基因表达 基质金属蛋白酶 

分 类 号：R739.8[医药卫生—肿瘤]