APOE and gastric cancer: The results showed that APOE, CTHRC1, and GXYLT2 were highly expressed in gastric cancer tissues compared with adjacent normal tissues (Figure 5L and Supplementary Figures 8B, D, F), while APOD was expressed at low levels in gastric cancer tissues (Figure 5L and Supplementary Figure 8A), and there were no significant differences in CCDC80, FERMT2, and SMPX (Supplementary Figures 8C, E, G).