title: [Selection and construction of cell line stably expressing survivin gene in lower level through eukaryotic plasmid vector of shRNA].
abstract: OBJECTIVE
  To construct a short hairpin RNA(shRNA) interference expression plasmid vector of survivin gene, transfect tongue squamous cell carcinoma line Tca8113 which expressed survivin gene in a high level, and choose the cells whose survivin gene were suppressed significantly.
  
  
  METHODS
  Two pairs of oligonucleotide sequences specific for survivin gene were designed and synthesized, and cloned into pSilencer-2.1U6-neo plasmid. The recombinant plasmids (named PS1 and PS2) were amplified in Ecoli. DH5alpha was identified by restriction digestion, PCR and sequencing. The vectors were transfected into Tca8113 cells with lipofectamine 2000. After selection with G418, the stable cell clones were attained. Survivn expression was assayed with real-time quantitative PCR and Western blotting. SAS8.0 software package was used for Student t test.
  
  
  RESULTS
  Two vectors were constructed successfully and stable cell clones with PS1 or PS2 plasmid were obtained. As compared with those of control, survivin expression of transfected cell with PS1 or PS2 in mRNA level was significantly suppressed (P<0.05). In protein level, only those of transfected cell with PS2 was significantly suppressed (P<0.01).
  
  
  CONCLUSIONS
  The shRNA interference expression plasmid vectors of survivin gene are successfully constructed, and Tca8113 cells which express survivin gene in a stable lower level are attained, which enable us to carry out further research on gene therapy of oral squamous cell carcinoma. Supported by National Natural Science Foundation of China (Grant No.30572056).
authors.affiliation: Department of Periodontology, College of Stomatology, Shandong University. Jinan 250012, Shandong Province, China. wangwx@sdu.edu.cn
authors.forename: Wen-Xia
authors.initials: WX
authors.lastname: Wang
authors.forename: Shan-Zhen
authors.initials: SZ
authors.lastname: Sun
authors.forename: Ying
authors.initials: Y
authors.lastname: Song
mesh_terms: D002294:Carcinoma, Squamous Cell / Q000473:pathology*; D002460:Cell Line; D045744:Cell Line, Tumor; D005822:Genetic Vectors; D006801:Humans; D010957:Plasmids; D034622:RNA Interference; D012333:RNA, Messenger; D034741:RNA, Small Interfering; D014062:Tongue Neoplasms / Q000473:pathology*; D014162:Transfection
chemical_list: D012333:RNA, Messenger; D034741:RNA, Small Interfering