Expression of LINC00659 in gastric cancer cells and its association with cell viability. A, The expression of LINC00659 in gastric cancer cell lines (SGC‐1901 and BGC‐823) and normal cell line, GES‐1. The expression level of LINC00659 was significantly higher in SGC‐7901 and BGC‐823 than that of GES‐1, P < .01. B‐C, The determination of siRNA silencing efficiency of LINC00659 in SGC‐7901 and BGC‐823 showed that the expression of LINC00659 in the si‐LINC00659 group was significantly lower than that of Control and si‐Negative (P < .01). D‐E, Cell viability by CCK‐8 assay showed that the cell viability was increased within 3‐48 h, which was significantly lower in the si‐LINC00659 group than that of the Control group and the si‐Negative group. Compared with Control group at the same time point, *P < .05; comparison with si‐Negative group, #P < .05. F‐H, Colony formation assay showed that the number of colony formed was significantly lower in the si‐LINC00659 group than that in the Control and si‐Negative groups (P < .01)