The lowest overall proliferation rate (Ki-67 immunostaining, Fig. 5b) and the highest pro-apoptotic capacity (cleaved caspase3 and Bax, Fig. 5c) were also observed in the combination group, further validating the improved anticancer efficiency of AZD1775 plus olaparib in mice bearing GC tumors. Here, MKI67 is linked to gastric cancer.