Fig. 1. The expression levels of CASC2, miR-18a, and miR-21 in NSCLC cells. (A) The relative expression levels of CASC2 were measured using qRT-PCR in the human bronchial epithelial cell line (16-HBE) and six NSCLC cell lines (A549, 95D, H522, H358, H1299, and SPC-A-1). *p < 0.05 vs. 16-HEB cells, n = 3. (B and C) The relative expression levels of miR-18a and miR-21were measured using qRT-PCR. *p < 0.05 vs. 16-HEB cells, n = 3. (D–F) The relative expression levels of CASC2, miR-18a, and miR-21 in A549 and cisplatin-resistant A549 (A549/CDDP) cells. *p < 0.05 vs. A549 cells, n = 3.