Fig. 3

Distribution of FOLR2+ macrophages and CD8+ T cells in tumor tissue of BRCA patients. Note A Representative co-localization confocal immunofluorescence image of FOLR2+ macrophages, CD31+ blood vessels, and CD8+ T cells in primary BRCA tumor tissue (Scale bars = 50 μm); B Stratification of CD8+ T cells and FOLR2+ macrophages based on subtype using multiplex immunofluorescence quantification; C Stratification of patients based on tumor staging using multiplex immunofluorescence quantification of FOLR2+ macrophages; D Representative multiplex immunofluorescence image showing expression of CD8, FOLR2, and CD206 proteins (Scale bars = 50 μm); E Quantitative analysis of CD8+ T cell density; F Analysis of the correlation between FOLR2 expression and CD8A, CD8B expression using the TCGA-BRCA dataset (n = 1113). ***indicates P < 0.001