CCDC144NL and gastric cancer: The qPCR assay was performed to confirm the expression of CCDC144NL-AS1 and LINC01614 in gastric cancer cells, and CCDC144NL-AS1 and LINC01614 were significantly up-regulated in AGS and SGC7901 cells compared to that in GES-1 cells (Figures 8A, B).