The frequency of different immune cell types was determined using FACS. Myeloid-derived suppressor cells (MDSCs) in tumor or spleen tissue were analyzed using a mouse MDSC Flow Cocktail 1 (CD11b PE/Gr-1 APC/Ly-6G FITC, BioLegend). Regulatory T cells were analyzed using the Mouse Regulatory T Cell Staining Kit #1 (eBioscience). FITC anti-mouse CD8α antibody (clone: 53-6.7, BioLegend), APC anti-mouse CCR5 antibody (clone: HM-CCR5, BioLegend), PE anti-mouse CCR6 antibody (clone: 29-2L17, BioLegend), and PE/Cy7 anti-mouse CCR7 antibody (clone: 4B12, BioLegend) were used to label isolated CD11c+ cells (38 (link)).
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