PDCD1 and gastric cancer: The expression of MAP1LC3C was significantly positively correlated to expression of PDCD1 (R = 0.31; p < 0.05), CTLA4 (R = 0.26, p < 0.001), LAG3 (R = 0.16; p < 0.05), CSF1 (R = 0.46; p < 0.05) and NT5E (R = 0.13; p < 0.05) in GC (Figure 8C).