MiR-1294 inhibits the progression of breast cancer via regulating ERK signaling.

Breast cancer (BC) is the most diagnosed carcinoma in women worldwide, which is characterized with a high incidence rate and poor prognosis. MicroRNAs (miRNAs) are promising biomarkers for early detection of BC. In this study, we demonstrated that MiR1294 was downregulated in BC. Moreover, we revealed that MiRNA1294 significantly suppressed cell proliferation, migration and invasion. Animal models revealed that MiRNA1294 reduced tumor formation. In addition, we found that ERK signaling was involved in the regulatory role of MiRNA1294 in BC. In conclusion, MiRNA1294 acted as a tumor suppressor in BC, which might serve as a potential target for the development of anti-neoplastic therapies in BC.