Figure 4

Correlation between baseline exoPD-L1 and cytokines. (a,c) exoPD-L1 showed a positive correlation with TGF-β1 and IFN-γ. (b) exoPD-L1 tended to negatively correlate with IL-10. (d,f) a higher level of TGF-β1 and IFN-γ was found in the high exoPD-L1 group than in the low exoPD-L1 group. (e) IL-10 level was higher in low exoPD-L1 group without significance. Spearman’s correlation analysis was performed in (a–c) Unpaired t-test was performed between two groups (d–f).