Comparison of NKA-IFNγ levels between healthy donors and GC patients showed that NKA-IFNγ levels were decreased in all age groups of GC patients (≤ 35 years, P = 0.022; 36-45 years, P < 0.001; 46-55 years, P < 0.001; 56-65 years, P = 0.028) (Figure 2). The gene discussed is IFNG; the disease is gastric cancer.