摘要目的 检测Bim蛋白在3种骨肉瘤细胞中和1种正常成骨细胞中的表达.方法 提取成骨肉瘤细胞Saos-2和成骨细胞hFOB 1.19中总RNA,通过全基因组表达谱芯片比较Bim基因在Saos-2和hFOB 1.19中表达;对骨肉瘤细胞MG-63、U2-OS、Saos-2及成骨细胞hFOB 1.19细胞进行细胞爬片免疫荧光、提取4种细胞中的总蛋白进行Western blot、提取4种细胞中的总RNA进行荧光定量聚合酶链反应(PCR),检测4种细胞内Bim的表达,观察骨肉瘤细胞与成骨细胞中Bim的差异,并通过查阅文献分析全基因组表达谱芯片中筛查出与Bim蛋白表达有关的基因.结果 全基因组表达谱芯片结果为Saos-2/hFOB 1.19=0.32,Saos-2中Bim基因表达比hFOB 1.19下调2倍以上;免疫荧光显示Bim在3种骨肉瘤细胞中的表达显著低于hFOB 1.19;Western blot条带结果表明Bim蛋白在hFOB1.19里面表达最多,定量分析条带灰度显示MG-63、U2-os、Saos-2及hFOB1.19细胞里面的表达值为0.04±0.02、0.15±0.01、0.12±0.02、0.39±0.02,3种骨肉瘤细胞Bim蛋白水平明显低于成骨细胞(P＜0.05);荧光定量PCR检测得出骨肉瘤细胞MG-63、U2-os、Saos-2及hFOB1.19里Bim mRNA的2-△△CT为:1.00±0.03、1.96±0.21、1.20±0.14、0.64±0.07,3种骨肉瘤细胞Bim mRNA明显低于成骨细胞,差异有统计学意义(P＜0.05);通过文献报道+基因芯片筛查出了10种可能跟Bim蛋白表达及生物学作用相关联的基因.结论 Bim在mRNA和蛋白水平下,骨肉瘤细胞中表达量明显少于成骨细胞.

abstractsObjective To examine the expression of Bim protein in three osteosarcoma cell lines and the osteoblasts. Methods Comparison of whole genome expression profiling chip in osteosarcoma cell Saos-2 expression and osteoblast hFOB 1. 19 expression; and then the Bim expression were detected and authenticated by immunofluorescence, Western blotting, quantitative polymerase chain reaction (PCR) on the MG-63, U2-OS, Saos-2 osteosarcoma cells and hFOB 1. 19 osteoblast to investigate the differences, and through literature review of whole-genome microarray screening for Bim expression of related genes. Results The gene expression microarray results of Saos-2/hFOB 1. 19 =0. 32,the Bim gene expression in Saos-2 is lower down than hFOB 1. 19 around 2 times; fluorescence signal of Bim in 3 osteosarcoma cells was significantly lower than hFOB 1. 19; Western blotting results show that Bim expression in hFOBl. 19 which is the most,quantitative analysis of band intensity showed MG-63, U2-os, Saos-2 and hFOBl. 19 expression is 0.04 ± 0. 02,0. 15 ± 0. 01,0. 12 ± 0. 02,0. 39 ± 0.02, Bim protein levels in osteosarcoma cells was significantly lower than osteoblast (P＜0. 05) ;fluorescence quantitative PCR detection of MG-63 ,U2-os,Saos-2 and hFOBl. 19 in Bim mRNA expression of 2-△△CT was:1. 00 ±0. 03,1. 96 ±0. 21,1. 20 ±0. 14,0. 64 ±0. 07, osteosarcoma cells Bim mRNA expression were significantly lower than that of osteoblast, the difference was significance (P＜0. 05) ;reviewed and gene chip screening came out of the 10 possible with Bim protein expression and biological function associated genes. Conclusion Bim mRNA and protein level expression in osteosarcoma cells were significantly lower than the osteoblast.