IL33 and neoplasm: Results showed that administration of IL-33sustained elevated levels of IL-33 in the serum of tumor-bearing mice (Figure 4A), significantly increasedtumor size (Figure 4A), andinduced the percentage of Tregs (Figure4B and C) as well as ST2L+Treg cells (Figure 4D and E) in both spleen and tumor tissue oftumor-bearing mice.