FOXP3 and neoplasm: Consistent with the reduction in tumor size, we found increased numbers of hematopoietic and T cell infiltrates (Supplementary Fig. 6d, e) However, we did not see differences in Foxp3 or PD-1 expression in the tumors from mice treated with the Lpx control or the G12D1–23–Lpx (Supplementary Fig. 6f, g).