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The down-regulation of miR-129 in breast cancer and its effect on breast cancer migration and motility
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- Author:
- No author available
- Journal Title:
- Acta Physiologica Sinica
- Issue:
- 4
- DOI:
- No doi available
- Key Word:
- miR-129;乳腺癌;迁移
Abstract： 本文旨在寻找抑制乳腺癌转移的microRNA (miRNA).综合利用miRNA靶基因预测软件和目前已知与肿瘤转移相关基因的对比分析,寻找出5个可能靶向乳腺癌转移相关基因的miRNA.以高转移乳腺癌细胞系MDA-MB-231细胞为模型,体外瞬时转染上述5个miRNA模拟物,用Transwell迁移实验筛选出能抑制细胞迁移运动的miRNA,并用Western blot检测分析了5个miRNA对E-cadherin蛋白表达的影响.筛选结果显示,miR-101、miR-129、miR-130、miR-133a和miR-144可以抑制乳腺癌细胞的迁移运动能力,其中miR101、miR129、miR-133a和miR144能不同程度地上调E-cadherin表达.划痕实验结果显示,miR-129能抑制其它两株高转移乳腺癌细胞系BT549和MDA-MB-435s的迁移运动.更为重要的是,Real-time RT-PCR结果显示,miR-129在大部分乳腺癌患者的癌组织样本和乳腺癌细胞系中表达下调.以上结果提示,过表达miR-129可以显著抑制乳腺癌细胞的迁移运动能力,而miR-129的低表达可能参与了乳腺癌的发生、发展和转移.
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