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 MCF7
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CD46siRNA对人乳腺癌MCF7 细胞增殖、侵袭及转移能力的影
响。方法 构建pEGFPC1CD46 siRNA并转染MCF7 细胞,检测CD46 mRNA及蛋白的表达水平
变化,观察MCF7/CD46siRNA 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
MCF7 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MCF7 细胞增殖活力逐渐升高,而沉默组MCF7 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MCF7 细胞侵袭及迁移计数显著高于沉默组(P<0.05)。结论 pEGFP
C1CD46 siRNA表达载体能够有效抑制乳腺癌MCF7 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.10056483.2014.08.009
Effects of CD46siRNA silencing on proliferation and metastasis of MCF7 human breast cancer
cell LIJie,LIJing.(Department ofTwo Tumor,CenterHospital ofCangzhou,Hebei061000,China)
[Abstract] Objective To establish and observe the effects of CD46siRNA on proliferation,in
vasion and metastasis of MCF7 human breast cancer cell.Methods The pEGFPC1CD46 siRNA was
established andtransfectedintothe MCF7 cell.Changesin CD46 mRNA andproteinexpressionweretest
ed andvariationofinvasionandmigrationcapacityinMCF7/CD46siRNAcellwasalsoobserved.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 MCF7 cells ofthe silence
group.Proliferation activity of MCF7 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
ofMCF7 cell in the control group and scram
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