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作 者:俞力[1] 范钰[1] 邱志远[1] 周永静[1] 龚丹丹[1] 肖秀娣[1] 武正炎[1]
机构地区:[1]江苏大学附属医院内分泌科,江苏省南京212001
出 处:《中国基层医药》2011年第15期2017-2019,I0003,共4页Chinese Journal of Primary Medicine and Pharmacy
基 金:江苏省镇江市2009年度科技计划项目(SS2009012)
摘 要:目的探讨TROP-2基因小干扰RNA(siRNA)对乳腺癌细胞黏附和侵袭力的影响。方法培养人乳腺癌Bcap-37、LCC1、MCF-7、MDA-MB-231、MDA-MB-435、MDA—MB-468及ZR75-1细胞株,以荧光实时定量PCR方法检测TROP-2基因mRNA表达;筛选出TROP-2表达最高者。采用TROP-2基因小干扰RNA转染乳腺癌细胞,分别以荧光实时定量RT-PCR和免疫荧光方法观察TROP-2基因mRNA和蛋白水平,然后以四唑蓝(MTT)比色法检测细胞黏附性,以Transwell方法检测癌细胞侵袭能力。结果7株乳腺癌细胞中,TROP-2均有不同程度的表达,以MCF-7细胞最高;以TROP-2siRNA转染乳腺癌MCF-7细胞后,癌细胞TROP-2基因mRNA和蛋白水平明显下降,且呈浓度依赖性;黏附试验结果显示,5、10、20nMsiRNA组黏附率分别为(52.9±2.5)%、(25.6±2.3)%、(12.8±2.2)%(P〈0.01);Transwell试验结果显示,5、10和20nMsiRNA组穿过滤膜的细胞分别为(78±17)、(39±15)、(19±16),而对照组分别为(136±25)、(139±21)(P〈0.01)。结论TROP-2基因在乳腺癌细胞黏附和侵袭中发挥着重要作用;以siRNA转染乳腺癌细胞,可抑制乳腺癌细胞黏附和侵袭能力。Objective To study the effects of tumor-associated calcium signal transducer-2 (TROP-2) gene small interfering RNA(siRNA)on adhesion and invasion of human breast cancer cell. Methods Real time PCR was used to evaluate the TROP-2 mRNA of seven human breast cancer cell lines Bcap-37 ,LCC1 ,MCF-7 ,MDA-MB-231, MDA-MB-435, MDA-MB-468,and ZR75-1. The cell line of TROP-2 highest expression was transfected with different dose of TROP-2 siRNA. The expression of TROP-2 mRNA and protein were determined by Real-time quantitative PCR and immumofiurescence method. The cell adhesion was evaluated by MTT assay, and invasion was exmined by boyden chamber,respectively. Results Cell line MCF-7 showed the highest elevation of TROP-2 mRNA in seven breast cancer cell lines. The results from real-time quantitative PCR and immumoflurescence method showed that TROP-2 mRNA and protein reduced in time-and dose-dependent manners( P 〈 0.01 ; P 〈 0.01 ). The adhesive rate of siRNA groups ( 5 nM, 10 nM, and 20 nM ) was ( 52.9 ± 2.5 ) %, (25.6 ± 2.3 ) %, ( 12.8 ± 2.2 ) % ( P 〈 0.01 ) , respectively. The transwen results showed that the invasion cells was (78 ± 17 ), ( 39 ±15 ), ( 19 ± 16 ), ( 136 ± 25 ) and ( 139 ± 21 ) in different groups(5,10,20 nM siRNA,and controls) ,respectively(P 〈0. O1 ). Conclusion TROP-2 gene might play an important role in adhesion and invasion of human breast cancer cell. siRNA targeted TROP-2 could effectively inhibit adhesion-and invasion of human breast cancer cell.
关 键 词:乳腺肿瘤 肿瘤相关钙信号传导蛋白-2
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