Figure 1.

CD39 and PD-1 on CD4⁺and CD8⁺T cells in NSCLC. A representative example of flow cytometry data. Expression and coexpression of PD-1 and CD39 were significantly higher in (A) CD4⁺ and (B) CD8⁺ T cells from tumor tissue than from adjacent normal lung. (C) Boxplots showing expression and coexpression of CD39 and PD-1 on CD4⁺ and CD8⁺ T cells in paired samples from tumor tissue and in adjacent normal lung (Wilcoxon signed-rank sum test).