(A) Mice bearing U251MG subcutaneous tumor xenografts were administered 6 or 22 via oral gavage, 2 mg/kg or vehicle (1% DMSO) every other day for 33 days. Tumor sizes, measured every 3 days, were converted to tumor volumes and plotted against days of treatment; and (B) immunoblots of pStat3, Stat3 or GAPDH in tumor tissue lysates prepared from control and treated mice. Positions of proteins in gel are labeled; control lanes (c) represent tissue lysates prepared from mice treated with 1% DMSO. Values, mean ± S.D., n=6. * - <0.05.