FOXP3 and neoplasm: Additionally, over-expression of Δ3,4-FOXP3 showed a significantly reduced inhibition on tumor growth (*P < 0.05, **P < 0.01; Fig. 3a) and migration (P = 0.018 and P = 0.039 for Hep3B and 97H, respectively; Fig. 3b) than full-length FOXP3.