Abstract
Aberrant gene expression caused by miRNAs disorders plays a relevant role in multiple steps of tumorigenesis. In this attempt, we studied the functional role of miR-125b-5p and TPD52 in breast cancer. TPD52 mRNA and miR-125b-5p levels were assessed via qRT-PCR, and TPD52 protein level was analyzed via western blot. By performing CCK-8, transwell invasion and wound healing assays, the phenotype changes in breast cancer cells were assessed. miR-125b-5p was proven as an upstream miRNA of TPD52 in breast cancer via TargetScan database, luciferase activity, and western blot. MiR-125b-5p was prominently decreased while TPD52 was dramatically increased in breast cancer cells. Functional assays exhibited that forced level of TPD52 facilitated cell proliferation, invasion and migration in breast cancer. In the end, the rescue assay proved that miR-125b-5p was a cancer repressor and modulated breast cancer progression by targeting TPD52. All above offer potential biomarkers for breast cancer treatment.
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