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miR-101增强多柔比星对乳腺癌细胞株MDA-MB-435的杀伤活性

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摘要 目的探讨microRNA-101(mi R-101)增强多柔比星对乳腺癌细胞的杀伤活性及机制。方法用荧光定量PCR方法检测人正常乳腺上皮细胞系MCF-10A及乳腺癌细胞系MCF-7、MDA-MB-231和MDA-MB-435miR-101的表达水平。MTT法检测mi R-101对多柔比星体外杀伤MDA-MB-435能力的影响。利用生物信息学及Western blot方法验证mi R-101是否调节MDA-MB-435细胞Mcl-1的表达。构建Mcl-1真核表达载体,MTT法检测Mcl-1表达载体转染对mi R-101联合多柔比星杀伤MDA-MB-435细胞疗效的影响。结果 (1)多柔比星对转染了mi R-101的乳腺癌细胞MDA-MB-435的细胞活力抑制率明显升高(P<0.05或P<0.01);(2)pc DNA3.1-Mcl-1的共转染显著抑制了mi R-101联合多柔比星对MDA-MB-435细胞的杀伤活性。结论 mi R-101通过下调Mcl-1的表达增强多柔比星对乳腺癌细胞的杀伤活性。
作者 张根花 张桢
出处 《浙江实用医学》 2016年第2期79-81,90,共4页 Zhejiang Practical Medicine
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