When compared with the non-tumorigenic IMR-90, the expression of FEZF1-AS1, LIN00673 and LINC01214 was markedly higher in most lung cancer cell lines; the expression of PCAT6 and LINC01929 was strikingly lower and no clear trend was observed for the expression of NUTM2A-AS1 (Fig. 3). Here, PCAT6 is linked to lung cancer.