摘要：目的利用RNAi技术研究p53基因表达.方法以质粒为载体,介导体外合成的具有与p53基因目的区域同源的特殊结构的DN段,通过脂质体将携带此片段的质粒载体导入COS-7细胞,利用载体的U6-RNA启动子,不断在体内产生21-23nt siRNA,引起目的基因p53的沉默并用Western blot检测p53的表达水平.结果通过质粒载体介导体外合成的具有特殊结构的DN段,能成功地导致p53蛋白的表达下降.结论RNAi技术可作为研究肿瘤基因的有效手段.
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