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Expression of PVR/CD155 and PD-L1 on tumor cells. Flow cytometry histogram representative of the expression of PVR/CD155 (A) and PD-L1 (B) on 4T1, CT26, MC38 and H22 cells. To analyze PVR/CD155, PE-conjugated rat-anti-mouse IgG2a was used as an isotype control. To analyze PD-L1, PE-conjugated rat-anti-mouse IgG2b was used as an isotype control. Data are presented as the mean fluorescence intensity (MFI) ± SD of three independent assay. **P < 0.01; ***P < 0.001; ****P < 0.0001.
