FOXP3 and neoplasm: We isolated IL-17A-producing Foxp3neg, IL-17A-producing Foxp3+ and IL-17Aneg Foxp3-expressing CD4+ T cells (Fig. 3b) and injected the Th17 and Treg subsets in Cd45.1 tumour-bearing mice on days 5, 12 and 19 (n=4 per group).