Fig. 4From: Interaction between PD-L1 and soluble VEGFR1 in glioblastoma-educated macrophagesPD-L1 blockade increases production of sVEGFR1 from GBM-educated macrophages. (a) sVEGFR1 levels on the supernatant of healthy control or GBM monocyte-derived macrophages (both n = 6), treated with isotype control or anti-PD-L1. * P < 0.05, ** P < 0.01, isotype control vs. anti-PD-L1. (b) Typical flow-cytometry results of VEGFR1 surface expression on GBM-educated macrophages, treated with isotype control or anti-PD-L1. (c) Relative sVEGFR1 mRNA levels of in healthy control or GBM monocyte-derived macrophages (both n = 6), treated with isotype control or anti-PD-L1. * P < 0.05, ** P < 0.01, isotype control vs. anti-PD-L1. P values are achieved by t-testBack to article page