生物技术通报 ›› 2013, Vol. 0 ›› Issue (2): 124-129.

• 研究报告 • 上一篇    下一篇

PDGF-GAL 真核表达载体的构建及细胞表达

荣曼 张锐虎 刘田福   

  1. (山西医科大学实验动物中心,太原 030001)
  • 收稿日期:2012-08-02 修回日期:2013-02-27 出版日期:2013-02-26 发布日期:2013-02-27
  • 作者简介:刘田福,男,教授,研究方向:人类疾病动物模型;E-mail :ykdltf@yahoo.com.cn
  • 基金资助:
    荣曼,女,硕士,研究方向:人类疾病动物模型;E-mail :834182410@qq.com

Construction of GAL’s Eukaryotic Expression Vector and Targeting Expression of GAL in N-2a Cells

Rong Man Zhang Ruihu Liu Tianfu   

  1. (Laboratory Animal Center of Shanxi Medical University,Taiyuan 030001)
  • Received:2012-08-02 Revised:2013-02-27 Published:2013-02-26 Online:2013-02-27

摘要: 旨在构建真核表达载体pcDNA-PDGF-GAL,观察重组质粒转染N-2a 细胞后甘丙肽基因(galanin,GAL)的表达水平。采用PCR 方法,以重组质粒pUC18-PDGF-GAL 为模板,扩增PDGF-GAL 基因序列,最终定向克隆入载体pcDNA3.1 并替换该载体的CMV 启动子与增强子序列,从而构建具有神经细胞特异性的表达载体pcDNA-PDGF-GAL。然后利用脂质体法将重组质粒瞬时转染小鼠N-2a 细胞,分别在转染后24、48 和72 h 收集细胞及细胞培养物,采用RT-PCR 和ELISA 方法,鉴定GAL 基因在神经细胞中的过表达。结果显示,经PCR 和DNA 序列测定证实,目的基因已插入表达载体,RT-PCR 和ELISA 证明,脂质体法瞬时转染N-2a 细胞实现GAL 基因的过表达。成功构建pcDNA3.1-PDGF-GAL,实现GAL 基因在N-2a 细胞过表达,从而为制作过表达GAL 的稳转细胞及进一步研究GAL 在神经系统的生物学功能奠定基础。

关键词: GAL, 表达载体, N-2a, 细胞, 转染

Abstract: The study was designed to construct eukaryotic expression vector pcDNA-PDGF-GAL, and observe the specific expression of GAL in N-2a after transferction. Firstly, the 2.9 kb PDGF-GAL fragment was amplified by PCR, then directedly cloned into pcDNA 3.1 vector, replacing the vector’s CMV promoter and enhancer and finally forming the recombinant vector pcDNA-PDGF-GAL which is neuronspecific expressed. Secondly, pcDNA-PDGF-GAL is transient-transfected into N-2a and the expression of GAL protein is detected by RT-PCR and ELISA. Results showed the sequencings result of pcDNA-PDGF-GAL was blasted on NCBI with standard sequence, in which PDGF-GAL fragment has a high nucleotide sequence identity(99%), and these results suggested that the construction of recombinant plasmid gets success. By RT-PCR and ELISA, it is confirmed that GAL protein is specifically over-expressed in N-2a. The neuron-specific eukaryotic expression vector was successfully constructed, and GAL protein is successfully over-expressed in N-2a, which established a basis for the preparation of stabletransfected cells over-expressing GAL and further exploring the biological functions of GAL on nervous system.

Key words: GAL, Expression vector, N-2a cell, Transfection