GAN and non-small cell lung carcinoma: Not unexpectedly, overexpressed miR-26a-5p significantly attenuates the expression of lnc-GAN1 in H1299 and H1650 cells (Fig. 5d); similarly, lnc-GAN1 overexpression also inhibits the expression of miR-26a-5p in A549 and H460 cells (Additional file 2: Fig. S4a), indicating that lnc-GAN1 and miR-26a-5p may directly interact with each other and that there is a negative correlation between their expressions in NSCLC cells.