携带小鼠信号转导子及转录激活子3重组慢病毒载体的构建与鉴定

目的：构建携带小鼠信号转导子及转录激活子3(STAT3)的重组慢病毒载体,并检测 STAT3的蛋白表达,进行慢病毒包装并鉴定。方法将小鼠成肌细胞总 RNA 通过 STAT3引物逆转录为 cDNA PCR 扩增、回收后,同 pLVX-IRES-Zs-Green1载体片段连接,酶切鉴定及测序,将 pLVX-IRES-ZsGreen1-STAT3转染293 T 细胞,48 h 后收集细胞,Western blot 检测STAT3表达量,通过瞬时转染法包装出病毒上清。结果测序结果证实 STAT3成功插入 pLVX-IRES-ZsGreen1慢病毒载体,成功构建了慢病毒载体 pLVX-IRES-ZsGreen1-STAT3,共转染293 T 细胞48 h,Western blot 检测 STAT3表达量明显增强。测定病毒滴度为8.4×107 TU/mL。结论成功构建了 STAT3基因的重组慢病毒表达载体,为进一步应用奠定了基础。

Construction and identification of a recombinant lentivirus harboring expressing Mus musculus STAT3 gene

Objective To construct recombinant lentivirus with the gene STAT3 of the Mus musculus,measure the expres-sion of STAT3,and conduct lentivirus packing and identification.Methods The mRNA of mouse myoblast was extracted and transformed into STAT3 cDNA by the special primer.then,STAT3 cDNA was amplified and reclaimed and inseted into pLVX-IRES-ZsGreen1 vector.Cleavage map and sequencing analysis were used for identification of the recombinant lentivirus vector (pLVX-IRES-ZsGreen1-STAT3).293 T cells were transfected with main vector pLVX-IRES-ZsGreen1-STAT3.and 48 h later, Western blott detected the expression of STAT3 protein.Lentiviral vectors were packaged and the titer was determined.Results The lentiviral vector plasmid pLVX-IRES-ZsGreen1-STAT3 was identified correctly by cleavage map and Co-transfection of 293 T cells with 48 h,the expression of STAT3 was significantly enhanced by western blot.And DNA sequencing analysis confirmed that STAT3 gene sequencing was exactly the same with that reported by genbank.Conclusion Lentiviral vector carrying STAT3 was successfnlly constructed and could express STAT3 with high efficiency,and can be used in further study.