NNT-AS1 and FOXM1 are up-regulated but miR-22 is down-regulated in LUSC tissues and cell lines. a-c Levels of NNT-AS1, miR-22 and FOXM1 were detected in LUSC tissues and non-tumor tissues using qRT-PCR. d-f Levels of NNT-AS1, miR-22 and FOXM1 in human bronchial epithelial cell line 16HBE and LUSC cell lines (H1703, SW900, H2170 and U1752) were detected using qRT-PCR. g-i The expression association among NNT-AS1, miR-22 and FOXM1 was analyzed using Spearman’s correlation test. *P < 0.05, **P < 0.01, ***P < 0.001.