永生化绵羊肺成纤维细胞系的构建及鉴定

摘要

The lentivirus system carrying hTERT gene was inserted to sheep lung fibroblasts (SLT) in order to establish an immortal cell line. Firstly, the recombinant lentiviral expression vector (pLOV-puro-hTERT) carrying hTERT gene was transfected into 293T cells. Subsequently, the primary SLT cells were infected with the rescued lentiviruses. The positive SLT cells expressing hTERT were selected with puromycin and examined with RT-PCR and Western blot. The results showed that hTERT gene was stably expressed in SLT cells, indicated that an immortalized SLT cell line had been established.%为了利用携带人源端粒酶逆转录酶(human telomerase reverse transcriptase,hTERT)基因的慢病毒表达系统将原代绵羊肺成纤维细胞进行永生化.本研究利用PCR技术从pBabe-neo-hTERT中扩增hTERT基因,并利用infusion技术构建重组慢病毒表达载体pLOV-puro-hTERT.将重组慢病毒三质粒系统共转染293T细胞,拯救出慢病毒颗粒并感染原代绵羊肺成纤维细胞,经嘌呤霉素抗性筛选获得阳性克隆,分别应用RT-PCR和Western blot方法检测传代细胞系中hTERT基因的转录和表达水平.筛选获得的阳性克隆,命名为SLT细胞系.SLT细胞系连续传代后RT-PCR及Western blot 检测均显示hTERT稳定表达.本研究表明,我们成功构建了永生化绵羊肺成纤维细胞系.