CD274 and cancer: After co-incubation with primary hepatocytes or other cancer cell lines such as AGS, HT29 and 786-O, the percentages of PD-L1+MDSCs did not differ compared with control (AGS 0.24%; p = 0.95, HT29 0.26%; p = 0.94, 786-O 0.19%; p = 0.82) (Fig. 3b).