MEG3 targets miR-184 and Wnt/β-catenin and modulates properties of osteosarcoma.

Recent studies indicate that MEG3, a long non-coding RNA (lncRNA) and microRNA-184 (miR-184) are abnormally expressed in osteosarcoma (OS). To this end, we show here that MEG3 negatively regulates the expression of miR-184 and down-stream effectors of WNT/β-catenin pathway including β-catenin, T-cell factor 4 (TCF4) and c-MYC. MEG3 overexpression by adenoviral vectors down-regulate proliferation, migration and apoptosis of OS in vitro and restrict the tumor growth in vivo. We also show that the effects of MEG3 can be effectively reversed by miR-184 mimic. Together these studies show that both MEG3 and miR-184 cooperatively regulate the proliferation, migration and apoptosis of OS.