TGFB1 and central nervous system cancer: The Spearman correlation analysis results suggested that the immune marker sets of Treg (FOXP3, CCR8, TGFβ1), TAM (CCL2, CD68, IL-10), and MDSC (CD33, ITGAM, FUT4) were significantly associated with the PROS1 expression in glioma (Figure 6E).