Abstract
In the treatment of breast cancer (BC), as an important type of cancer in women, the specific cells, called cancer stem cells (CSCs), are the reason of failure and metastasis. So, targeting CSCs can be used as a novel strategy in cancer therapy in addition to common therapeutic strategies. According to the importance of CSCs, we tried to find a correlation between stemness and metastatic characteristics of BC cells, to address whether CSCs are a potential target for cancer therapy. Here, we evaluated the NANOG inhibition by siRNA and the increase of Let-7a levels by miRNA mimic in breast cancer cells and the effects of these changes on biologic aspects like cell apoptosis, stemness and invasion. Our results showed that the inhibition of NANOG combined with Let-7a restoration contributed to significant decrease in malignant phenotypes and stemness feature of BC cells. In conclusion, these findings showed that the combination of Let-7a miRNA mimic and Nanog siRNA could be exploited as a new treatment strategy to improve the cancer therapy outcome.
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