miR-149-3p suppressed epithelial-mesenchymal transition and tumor development in acute myeloid leukemia

Acute myeloid leukemia (AML) is a form of primary acute leukemia with high mortality. Our previous study demonstrated that miR-149-3p was down-regulated in chemoresistant acute leukemia cells. However, the biological function of miR-149-3p in AML needs to be further explored.

Herein, the expression of miR-149-3p was overexpressed/silenced in U-937 human AML cells via transfection with miR-149-3p agomir/antagomir. The effect of miR-149-3p on U-937-induced tumor growth was investigated using a xenograft nude mouse model.

The results showed that miR-149-3p overexpression inhibited the proliferation and increased the apoptosis of U-937 cells. In addition, miR-149-3p suppressed epithelial-mesenchymal transition in U-937 cells, as demonstrated by the miR-149-3p agomir-induced increase in E-cadherin expression and decrease in vimentin expression. The in vivo experiments demonstrated that miR-149-3p suppressed tumor progression.

In conclusion, the findings revealed the association of miR-149-3p with the development of AML and suggest that miR-149-3p is a potential therapeutic candidate for AML.