Therapy with anti‐PD‐1 antibody or αKG treatment alone both inhibited tumor growth in two respective murine models, while combination therapy of anti‐PD‐1 antibody and αKG treatment further delayed tumor growth or even led to tumor regression (Figure 7C,D) and significantly increased overall survival compared with monotherapy (Figure 7E,F). The gene discussed is PDCD1; the disease is neoplasm.