NRP1 and gastric cancer: The results were: (1) The level of NRP1 in normal mucosa tissues was significantly lower than that of GC tissues (P<0.05); (2) The expression of NRP1 was closely related to the TNM stage of GC patients; (3) The OS of GC patients with high NRP1 expression was significantly lower than that of patients with low NRP1 expression (P=0.00019, HR=1.8).