Fig. 9

PD-L1 expression in the tumors with or without TAMs depletion. A Tumor tissue sections showing IHC staining of PD-L1. Staining of PD-L1 appeared as dark brown spots. B, C Cell surface PD-L1 expression in the tumor cells and TAMs assayed via immunofluorescent staining and flow cytometry. Values are means ± standard deviation (SD). (n = 3, ## & **p < 0.01). Representative flow cytometry dot plots/histograms are provided in Additional file 1: Fig. S7