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siRNA 沉默 CD46基因表达对乳腺癌 MCF-7细胞增殖及转移能力的影响.pdf

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·564 · 临床外科杂志2014 年8月第22卷第8期 J Clin Surg,August2014,Vol.22,No.8 ·论著 · siRNA沉默 CD46基因表达对乳腺癌 MCF7 细胞增殖及转移能力的影响 李杰 李静   [摘要] 目的 构建并观察CD46siRNA对人乳腺癌MCF7 细胞增殖、侵袭及转移能力的影 响。方法 构建pEGFPC1CD46 siRNA并转染MCF7 细胞,检测CD46 mRNA及蛋白的表达水平 变化,观察MCF7/CD46siRNA 细胞侵袭及迁移能力变化。结果 与对照组及乱序组相比,沉默组 MCF7 细胞CD46 mRNA相对表达量显著降低(P<0.05),CD46 蛋白表达也显著被抑制。随着时 间的延长,对照组和乱序组MCF7 细胞增殖活力逐渐升高,而沉默组MCF7 细胞增殖活力升高不 明显。第3、4天时,三组细胞增殖活力差异有统计学意义,且沉默组均显著低于其他两组(P < 0.05)。对照组及乱序组MCF7 细胞侵袭及迁移计数显著高于沉默组(P<0.05)。结论 pEGFP C1CD46 siRNA表达载体能够有效抑制乳腺癌MCF7 细胞 CD46 基因及蛋白表达,可以降低乳腺 癌细胞增殖活力、侵袭及迁移能力。 [关键词] 乳腺癌;  CD46;  增殖;  侵袭;  迁移 [中图分类号]R737.9  [文献标识码]A  [DOI]10.3969/j.issn.10056483.2014.08.009 Effects of CD46siRNA silencing on proliferation and metastasis of MCF7 human breast cancer cell LIJie,LIJing.(Department ofTwo Tumor,CenterHospital ofCangzhou,Hebei061000,China) [Abstract] Objective To establish and observe the effects of CD46siRNA on proliferation,in vasion and metastasis of MCF7 human breast cancer cell.Methods The pEGFPC1CD46 siRNA was established andtransfectedintothe MCF7 cell.Changesin CD46 mRNA andproteinexpressionweretest ed andvariationofinvasionandmigrationcapacityinMCF7/CD46siRNAcellwasalsoobserved.Results  Compared with the control group and scrambled group,the expression ofCD46 mRNA was significantly decreased(P<0.05)and CD46 protein expression was also suppressed in the MCF7 cells ofthe silence group.Proliferation activity of MCF7 cell in the control group and scrambled group was gradually in creased withthetime,butthisphenomenonwasnotobviousinthe silencegroup.Atthe3thand4thdayaf tertranscription,differences in proliferation activity were significant among the groups,and activity in the silentgroupwassignificantlylowerthanthe othertwo groups(P<0.05).Countsin invasion and migration ofMCF7 cell in the control group and scram
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