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通过下调Lewis肺癌细胞Vav3基因的表达抑制细胞增殖 被引量:5

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摘要 目的通过下调Lewis肺癌细胞Vav3基因的表达,观察Vav3表达对Lewis肺癌细胞体外增殖能力的影响。方法设计合成3条针对小鼠Vav3的小干扰RNA序列(Vav3-mus-163,Vav3-mus-309,Vav3-mus-375),瞬时转染至Lewis肺癌细胞,采用Real-time PCR和Western印迹方法检测干扰前后Vav3的表达,并挑选出下调效果最好的一条干扰序列进行细胞MTT实验,分别在24、7、2 h观察下调Vav3基因表达后对Lewis肺癌细胞体外增殖能力的影响。结果瞬时转染三条siRNA序列Vav3-mus-163、Vav3-mus-309、Vav3-mus-375,检测Vav3基因相对表达含量分别为1.121 7±0.105 5、2.030 5±0.386 1和3.175 9±0.730 4。分别与Lewis肺癌细胞组(6.704 5±0.183 3)和阴性对照组(6.083 7±0.317 2)相比,转染Vav3-mus-163组和转染Vav3-mus-375组的Lewis肺癌细胞Vav3基因表达明显下调(P<0.01,P<0.05)。在蛋白水平瞬时转染三条小干扰RNA序列Vav3的表达分别为0.112 8±0.005 8、0.203 2±0.008 3、0.293 8±0.219 1,与Lewis肺癌细胞组(0.408 3±0.004 6)和阴性对照组(0.388 9±0.005 4)比较,转染Vav3-mus-163组Vav3蛋白表达明显下调(P<0.05)。Vav3-mus-163序列能够在mRNA水平和蛋白水平显著下调Vav3的表达。MTT法检测瞬时转染Vav3-mus-163后72 h细胞的增殖率为78.4%,与阴性对照组细胞增殖率92.9%相比差异显著(P<0.05)。结论下调Lewis肺癌细胞中Vav3的表达,可使癌细胞的增殖能力下降,说明Vav3具有促进Lewis肺癌细胞增殖的作用。Vav3表达与肺癌的发生发展有关联。
出处 《中国老年学杂志》 CAS CSCD 北大核心 2012年第17期3726-3728,共3页 Chinese Journal of Gerontology
基金 黑龙江省卫生厅科研课题(No.2010-231)
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