PTEN公司
癌变
癌症研究
乳腺癌
医学
小RNA
PI3K/AKT/mTOR通路
细胞周期蛋白D1
蛋白激酶B
细胞周期蛋白依赖激酶6
下调和上调
细胞周期
癌症
细胞周期蛋白D
细胞生长
信号转导
内科学
生物
细胞生物学
基因
生物化学
遗传学
作者
Lifeng Zhang,Jigang Zhang,Hao Zhou,Tiantian Dai,Fengbao Guo,Shao‐Yong Xu,Yan Chen
摘要
MicroRNA-425-5p (miR-425-5p) has been reported to be involved in the tumorigenesis of several tumors, but its function in breast cancer is still unknown. In this study, miR-425-5p was found significantly upregulated in breast cancer cells, and predicted a poor prognosis for breast cancer patients. Overexpression of miR-425-5p could significantly promote breast cancer cell growth. Further studies showed that overexpression of miR-425-5p upregulated the protein levels of Cyclin D1, Cyclin D3, CDK4, and CDK6. However, inhibiting miR-425-5p downregulated their expression and induced cell cycle arrest at G0/G1 phase. In mechanism, overexpression of miR-425-5p increased the phosphorylation of PI3K p85 and AKT, but inhibiting miR-425-5p displayed opposite effects. Moreover, miR-425-5p bound to the 3'UTR of PTEN mRNA, and downregulated the expression levels of PTEN in both mRNA and protein levels in breast cancer cells. Collectively, the results above demonstrated that miR-425-5p was involved in the tumorigenesis of breast cancer by inducing PI3K/AKT signaling and indicated that miR-425-5p could be as a potential target for breast cancer therapy in the future.
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