miR-1307-3p Stimulates Breast Cancer Development and Progression by Targeting SMYD4

• Published in: Journal of Cancer 2019, Vol.10 (2), p.441-448
• Main Authors: Han, Sanghak, Zou, Hua, Lee, Jin-Won, Han, Jeonghee, Kim, Heung Cheol, Cheol, Jeong Jin, Kim, Lee-Su, Kim, Haesung
• Format: Article
• Language: English
• Subjects: Research Paper
• ISSN: 1837-9664; 1837-9664
• DOI: 10.7150/jca.30041

Recent studies show that dysregulated miRNAs play an important role in breast cancer initiation and progression. Here, we identified upregulated expression of miR-1307-3p in breast cancer tissues and that increased level of miR-1307-3p was closely correlated with lower survival rate in breast cancer patients. Consistent with clinical data, our data show that expression level of miR-1307-3p was significantly increased in breast cancer cell lines compared to human mammary epithelial cell line MCF10A. Overexpression of miR-1307-3p in MCF10A stimulated cell proliferation and caused their growth in soft agar and tumor formation in nude mice. In contrast, inhibition of miR-1307-3p suppressed breast cancer cell proliferation and their growth in soft agar and inhibited tumor formation in nude mice. Further, we identified that miR-1307-3p plays its oncogenic role through targeting SET and MYND domain-containing 4 (SMYD4) expression in breast cancer. Taken together, our findings suggest that miR-1307-3p is a oncogenic miRNA that significantly contributes to breast cancer development and progression, and inhibition of miR-1307-3p may be a novel strategy for inhibits breast cancer initiation and progression.