miR-655-3p functions as a tumor suppressor in tumor metastases; however, its role and mechanism in regulating cell migration and invasion of non-small cell lung cancer (NSCLC) remain unclear. Here, we found that miR-655-3p expression was markedly decreased in the NSCLC cell lines A549, NCI-H1650, PC14/b, NCI-H1299, and HPAEpiC compared to levels observed in normal human lung fibroblasts. miR-655-3p overexpression significantly inhibited migration and invasion of A549 and PC14/b cells, and pituitary tumor-transforming 1 (PTTG1) expression was up-regulated in the NSCLC cells. Luciferase reporter assay indicated that PTTG1 was a direct target of miR-655-3p. Additionally, PTTG1 overexpression alleviated the inhibitory effect of miR-655-3p on migration and invasion abilities in A549 and PC14/b cells. In conclusion, miR-655-3p inhibits NSCLC migration and invasion by targeting PTTG1, suggesting that miR-655-3p may serve as a therapeutic target to provide a new approach for the clinical treatment of NSCLC.
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| http://dx.doi.org/10.1080/09168451.2019.1617109 | DOI Listing |
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