摘要：RNAi技术的关键是siRNA的制备，实验结果证实，通过发卡结构的小RNA（shRNA）载体表达siRNA可以抑制特定靶基因表达。我们通过将针对IGFIR基因的RNA干扰片段装入特定质粒PSUPER中，再转染入人肝癌细胞株SMMC7721中，并筛选出稳定株。
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