Fig. 6: LINC02139 is positively correlated with XIAP in the human GC samples and participates in mediating GC cell apoptosis.

A XIAP protein expression in 12 pairs of human GC samples was detected using western blotting, normalized to GAPDH. The relative protein expression level was quantified by comparing the gray level of each band. N, normal; T, tumor. *P > 0.05; ****P < 0.001. B LINC02139 expression in the 12 pairs of human GC samples was measured using qRT-PCR. Normalized to GAPDH. N, normal; T, tumor. *P > 0.05; **P < 0.05, ***P < 0.01, ****P < 0.001. C A Pearson correlation analysis was performed to determine the correlations between LINC02139 and XIAP expression. D A fluorescent microscopy technique was applied to visualize the Hoechst 33258 staining in the nucleus of the indicated transfected GC cells. Arrows in the images indicate the cells with condensed chromatin and fragmented nuclei. The apoptotic ratios were displayed. ***P < 0.01, ****P < 0.001. E Flow cytometry assays were used to inspect the apoptosis in the transfected GC cells. The apoptotic ratios were shown as histograms. ****P < 0.001. Scale bars, 50 μm in (D).