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Purpose: MicroRNAs (miRNA) have been reported in the regulation of various pathobiological progression in cancer. Our recent study has reported that miR-3614-3p significantly suppressed the proliferation of Breast Cancer (BC) cells through the downregulation its host gene TRIM25. However, the other functional role of miR3614-3p migration and invasion in BC and its mechanism have not been investigated thoroughly.  Materials and methods: The MDA-MB-231 and MCF-7 BC cell lines were purchased. The cell line expression levels of miR-3614- 3p and AKT3/HDAC1 were determined by quantitative real-time PCR (qPCR). The wound healing assay and transwell migration assay were determined. We next measured protein levels of AKT3/HDAC1 by Western blot. Finally, we investigated the role of AKT3/HDAC1 using siRNA; and confirmed the targeting of 3’UTR of AKT3 and HDAC1 through miR-3614-3p using a luciferase reporter assay.  Results: In the present research, we studied that overexpression of miR-3614-3p markedly suppressed tumor cell invasion and migration independent TRIM25, whereas through regulated another targets AKT3 and HDAC1 expression. Notably, TRIM25 is also a target gene of miR-3614 which bind to pri-miR-3614 caused TRIM25 silence.  Conclusion: miR-3614-3p is an anti-oncogene that can suppress breast cancer cell aggressiveness by targeting AKT3 and HDAC1, which reveals the potential values of miR-3614-3p for suppression of metastasis of BC.  Keywords: Breast cancer; miR-3614; AKT3; HDAC1.

miR-3614-3p suppresses cell aggressiveness of human breast cancer by targeting AKT3 and HDAC1 expression