miR-215 suppresses proliferation and migration of non-small cell lung cancer cells.

The expression of microRNA-215 (miR-215) in non-small cell lung cancer (NSCLC) tissues and the effects of miR-215 on the proliferation and migration of NSCLC cells were investigated. qRT-PCR was used to detect the expression of miR-215 in NSCLC tissues and paired normal tumor-adjacent lung tissues; MTT assay, transwell assay and soft-agar assay were used in vitro to evaluate the role of miR-215 on proliferation, migration and cell clonality on NSCLC cells, after transfecting miR-215 mimics to NSCLC cell line A549 or miR-215 to H1299. miR-215 was significantly decreased in NSCLC tissues compared to the paired normal tissues; Overexpression of miR-215 in A549 cells resulted in reduction of the cell proliferation, migration and cell clonality, while downregulation of miR-215 in H1299 cells could promote cell proliferation, migration and clonality. In conclusion, miR-215 was downregulated in NSCLC tissues and may play a key role in the development of NSCLC.