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聚乙烯亚胺介导siRNA和顺铂协同抗肿瘤治疗

DOI: 10.11777/j.issn1000-3304.2015.14259, PP. 127-132

Keywords: 聚乙烯亚胺,Survivin基因,顺铂,协同作用,抗肿瘤

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Abstract:

用聚乙烯亚胺(PEI)为载体,介导siRNA(siSurvivin)沉默肿瘤细胞抗凋亡基因survivin,并与抗癌药物(顺铂)进行协同抗肿瘤治疗.凝胶阻滞电泳实验显示,PEI能够对siRNA进行有效复合,在PEI/siRNA质量比为0.4时实现完全阻滞.细胞耐药性实验证明了耐顺铂细胞(A549DDP细胞)的survivin基因过度表达且耐顺铂能力是顺铂敏感细胞(A549细胞)的8倍.RT-PCR实验验证了PEI担载siSurvivin后对survivin基因实现了有效沉默,与顺铂药物共同作用后不影响基因沉默效果.细胞凋亡实验验证了基因与药物协同作用后细胞的凋亡率达到60.9%,而单独药物或PEI/siSurvivin复合物分别作用后的细胞凋亡率仅分别为30.2%和19.8%.细胞增殖实验进一步验证了PEI介导siSurvivin与顺铂联合治疗能够实现有效地协同抗肿瘤效果.

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