J4 ›› 2009, Vol. 35 ›› Issue (6): 1057-1060.

• 基础研究 • 上一篇    下一篇

亚细胞定位PTEN基因真核表达载体的构建与鉴定

李洪凌1| 朱向辉1| |姜新1| 曲雅勤1|李亮2   

  1. 1.吉林大学第二医院放疗科|吉林 长春 130041;2.复旦大学附属金山医院医学影像中心|上海 200540
  • 收稿日期:2009-06-10 出版日期:2009-11-28 发布日期:2009-11-28
  • 通讯作者: 曲雅勤 E-mail:quyaqin52@163.com
  • 作者简介:李洪凌(1979-)|男|河北省衡水市人|医学博士|主要从事肿瘤放疗增敏研究。
  • 基金资助:

    吉林省科技厅白求恩基金资助课题(200705221)

Construction and identification of wild-type PTEN |eukaryotic expression vector

 LI Hong-Ling1, ZHU Xiang-Hui1, JIANG Xin1, QU Ya-Qin1, LI Liang2   

  1. 1.Department of Radiotherapy,Second Hospital,Jilin University,Changchun |130041,China;2.Medical Imaging Center of Jinshan Hospital,Fudan University,Shanghai 200540,China
  • Received:2009-06-10 Online:2009-11-28 Published:2009-11-28

摘要:

目的:构建人野生型亚细胞定位PTEN基因真核表达载体,为进一步研究其抗肿瘤作用奠定基础。 方法:以胎盘组织RNA为模板,利用RT-PCR技术扩增目的基因片段。PCR产物与T载体连接,转化大肠杆菌,获得T-PTEN质粒,进行酶切鉴定和测序。以T-PTEN质粒为模板,利用PCR技术将核定位信号(NSL)加入PTEN序列。PCR产物与T载体连接,转化大肠杆菌,获得T-NSL-PTEN质粒。真核表达载体pcDNA3.1及T-NSL-PTEN质粒经EcoRⅠ和BamHⅠ双酶切后连接,转化大肠杆菌,获得重组载体pcDNA3.1-NSL-PTEN,进行酶切和测序鉴定。结果:重组质粒PUM-PTEN酶切在1 200 bp处见目的片段,与预期结果符合。测序结果显示基因序列与目的基因完全一致;重组质粒PUM-NSL-PTEN酶切在1 200 bp处见目的片段,测序结果显示基因序列与设计一致,核定位信号成功加入;重组质粒pcDNA3.1-PTEN酶切在1 200 bp处见目的片段,测序结果显示基因序列与目的基因相同;重组载体pcDNA3.1-NSL-PTEN经双酶切和测序证实了其正确性EcoRⅠ和BamHⅠ双酶切在1 200 bp处见目的片段,与预期结果一致。测序结果显示,核定位信号成功加入,其后是阅读框架正确的PTEN基因序列。结论:成功构建可表达亚细胞定位PTEN的真核表达载体pcDNA3.1-NSL-PTEN。

关键词:  亚细胞定位; PTEN基因; 质粒

Abstract:

Objective
To construct the recombinant plasmid that highly expressed h
uman subcellular PTEN,inorder to provide a basis for further study on its anti-tumor effect.
Methods PTEN cDNA was amplified by RT-PCR based on mRNA of placenta.The PCR product was ligated into T-vector,and transfected into E.coli;the obtained T-PTEN plasmid was identified with restrictive digestion and sequencing.PCR was  used to incorporte nuclear signal of localization(NSL) into PTEN when T-PTEN was used as template.Then the PCR product  was  ligated into T-vector,and transfected into E.coli,and T-NSL-PTEN plasmid was obtained.pcDNA3.1 and T-NSL-PTEN were ligated after digested with EcoRⅠand BamHⅠ,and transfected into E.coli,the recombinant vector pcDNA3.1-NSL-PTEN was obtained,and identified with digestion and sequcncing.Results The recombinant  expression vector DUM-PTEN and PUM-NSL PTEN were  identified by restrictive digestion and DNA sequencing.As expected,by EcoRⅠ and BamHⅠ digestion,it showed the band of 1 200 bp.The sequencing result showed the NSL was incorporated successfully.The recombinant pcDNA3.1-PTEN was obtained with 1 200 bp,the sequencing result showed that its sequence was same as target gene;the recombinant pcDNA3.1-NSL-PTEN was comfirmed by restrictive digestion and sequencing,and the NSL was incorporated successfully. Conclusion The  recombinant expression plasmid pcDNA3.1-NSL-PTEN is constructed successfully which can highly express human subcellular PTEN.

Key words:  subcellular, PTEN gene, plasmid

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