摘要
目的 :探讨截短型bid(truncatedbid ,tbid)基因的表达对Hela细胞的促进凋亡活性。方法 :用RT PCR法克隆人全长bid基因 ,测序正确后 ,通过PCR截去编码N末端 6 0个氨基酸残基的基因 ,而获得tbid基因。将其克隆入含绿色荧光蛋白(GFP)基因的真核表达载体pIRES2 EGFP中 ,用脂质体法转染Hela细胞。通过荧光显微镜、电子显微镜观察和TUNEL检测法 ,检测目的基因的表达对转染细胞的形态及生长状况的影响。结果 :成功地构建了tbid基因的真核表达载体。以其转染Hela细胞后 ,tbid基因在细胞中得到表达 ,随后引起细胞荧光强度下降 ,生长状况不良甚至死亡。电镜观察及TUNEL检测的结果显示 ,许多细胞呈典型的凋亡特征。结论
AIM: To explore the expression of the truncated bid gene and its pro-apoptotic effect on Hela cells. METHODS: A full-length human bid gene was cloned by RT-PCR and confirmed by sequence analysis. By deleting the 60 amino acids of N-terminal the truncated bid (tbid) gene was obtained and then inserted into the eukaryotic expression vector pIRES2-EGFP. After the tbid gene was transfected into Hela cells under lipofectamine mediation, the effect of target gene expression on morphology and growth of Hela cells were observed under fluorescence and electron microscopes and analysed by TUNEL staining. RESULTS: pIRES2-EGFP containing tbid gene was constructed successfully. After Hela cells were transfected with GFP expression vector of tbid gene, tbid was expressed which was followed by decreased cell fluorescence intensity, poor cell growth, and cell death. Cell shrinkage and nuclear condensation, typical apoptotic characteristics, were observed by electron microscope observaion and Tunel staining. CONCLUSION: The expression of tbid can effectively induce apoptosis of Hela cells.
出处
《细胞与分子免疫学杂志》
CAS
CSCD
北大核心
2004年第1期19-22,共4页
Chinese Journal of Cellular and Molecular Immunology
基金
国家杰出青年科学基金资助 (No .399Z50 36)
国家高技术研究发展计划 (863)资助 (No .2 0 0 1AA2 1 71 0 1 )
