Abstract
Breast cancer is one of the most common malignant tumors in women worldwide. The microRNAs (miRNAs) are small, noncoding RNAs that regulate various biological processes, including breast cancer. miR-708 played an important role in a variety of cancers. However, its involvement in breast cancer remains largely unclear. In this study, we found that forced the expression of miR-708 in breast cancer cell lines decreased cell proliferation and invasion, whereas inhibition of miR-708 increased cell growth and invasion. miR-708 could directly target the LSD1 3'UTR to downregulate the expression. Further studies suggested that inhibition of LSD1 could phenocopied function of the miR-708 overexpression in MDA-MB-231 cells .Overexpression of LSD1 could counteract the effects of miR-708 on the proliferation and invasion. Taken together, the results indicate that miR-708 may function as a tumor suppressor gene in breast cancer development, and miR-708/LSD1 axis may be a therapeutic intervention in breast cancer in the future.