Figure 1. Co-expression of PD-1 and PD-L1 in a Lung Cancer Patient.

(A) Gating strategy for analyzing PD-1 and PD-L1 expression in human patient samples where CD45⁺/CD3⁺ cells were classified as T cells, CD45⁺/CD3⁻ cells as B cells, CD45⁺CD11c⁺ cells as DCs, CD45⁺CD11b⁺ cells as macrophages (Macs) and MDSCs, and CD45⁻ cells within the tumor site as tumor cells.

(B) Expression of PD-1 and PD-L1 on the indicated cell types derived from PBMCs from a healthy human individual, a lung cancer patient, and the tumor site of the same patient.

See also Figures S1 and S2 and Table S1.