Inhibitory effects of forbesione on Ham-1 cell allografts. (A) Tumor allografts were isolated from treated and control groups following intradermal injection of Ham-1 cells. After 4 weeks of forbesione treatment, the antitumor activity was evaluated according to (B) tumor volume and (C) tumor weight measurements. Data are presented as the mean ± standard deviation. *P<0.05, **P<0.01, **P<0.001. Forb, forbesione; DMSO, dimethyl sulfoxide.