抑制NBS1表达对三阴性乳腺癌细胞MDA-MB-231增殖和凋亡的影响  

NBS1 gene knockdown suppresses proliferation and promotes apoptosis of human triple-negative breast cancer MDA-MB-231 cells

作　　者：华晶[1] 王雅杰[1] 

机构地区：[1]第二军医大学附属长海医院肿瘤科,上海200433

出　　处：《同济大学学报（医学版）》2015年第2期1-5,共5页Journal of Tongji University(Medical Science)

基　　金：上海市科委基础研究重点项目(13NM1401504);上海市自然科学基金(14ZR1408800);第二军医大学长海医院1255学科建设计划特色培育项目(CH12553044)

摘　　要：目的探讨siRNA抑制NBS1基因表达对三阴性乳腺癌细胞MDA-MB-231增殖和凋亡的影响。方法通过构建NBS1干扰质粒和阴性空载质粒,并通过腺病毒载体感染MDA-MB-231细胞,Western印迹法明确NBS1基因受干扰情况;CCK-8法检测转染质粒后对MDA-MB-231细胞体外增殖能力的影响;流式细胞法检测感染后实验组和阴性对照组MDA-MB-231细胞的凋亡情况。结果 Western印迹法检测结果表明实验组NBS1蛋白表达水平明显低于阴性对照组和空白对照组(P<0.05);CCK-8实验结果显示,与阴性对照组和空白对照组相比,实验组细胞增殖能力受到抑制(P<0.05);流式细胞仪检测结果显示,实验组较阴性对照组凋亡率上升(P<0.05)。结论抑制NBS1基因的表达可以抑制三阴性乳腺癌细胞增殖,并促进癌细胞的凋亡。Objective To investigate the effect of NBS1 knockdown on proliferation and apoptosis of human triple-negative breast cancer MDA-MB-231 cells. Methods MDA-MB-231 cells were infected with adenovirus vector containing NBS1-siRNA plasmid. The expression of NBS1 was determined by Western blotting. Cell proliferation was detected by CCK-8 assay,and cell apoptosis was analyzed by using FCM. Results Western blotting showed that the expression of NBS1 was decreased in NBS1-siRNAi transfected MDA-MB-231 cells（ P 〈0. 05）. CCK-8 assay demonstrated that of the proliferation of MDA-MB-231 cells in NBS1-siRNA group was lower than that in negative and blank control groups（ P 〈0. 05）. FCMrevealed that the apoptosis rate of NBS1-siRNA group was higher than that of negative and blank control groups（ P 〈0. 05）. Conclusion Inhibition of NBS1 gene expression can suppress the proliferation and promote apoptosis of human triple-negative breast cancer MDA-MB-231 cells.

关 键 词：三阴性乳腺肿瘤 NBS1 细胞增殖 细胞凋亡 SIRNA 

分 类 号：R737.9[医药卫生—肿瘤]