携带内皮抑素基因的重组腺病毒的构建

目的 利用AdEasy-1系统,构建并鉴定人内皮抑素重组腺病毒,为后续的实验奠定基础.方法 以PshuttleEndostatin质粒为模版PCR扩增内皮抑素基因片断,克隆至穿梭质粒pAdTrack-CMV中,再与骨架质粒pAdEasy-1在大肠杆菌BJ5183中同源重组,在AAV293细胞中包装并扩增.结果 重组腺病毒经测序、酶切鉴定正确,病毒滴度为2.06×1010 pfu/ml.结论 人内皮抑素重组腺病毒pAd-Endo构建成功.

Construction of a recombinant adenovirus carrying endostatin gene

OBJECTIVE: To construct a recombinant adenovirus carrying human endostatin gene with AdEasy system. METHODS: Endostatin gene fragment was amplified from Pshuttle-Endostatin plasmid with PCR and subcloned into the pAdTrack-CMV shuttle vector. The resultant plasimid was cotransduced into E.coli BJ 5183 cells with pAdEasy-1 plasmid for homologous recombination. The linearized recombinant plasmid was subsequently transfected into AAV 293 cells, and the recombinant adenovirus was detected by GFP, PCR and restriction analysis. RESULTS AND CONCLUSION: The positive clones of the recombinants were verified by restriction analysis and the titer of the virus reached 2.06 x 10(10)pfu/ml, suggesting successful construction of recombinant adenovirus pAd-Endo.