MTT assay and flow cytometry were used to determine the growth inhibition and cell cycle intervention effects of bufalin, cinibufagin and resibufogenin on hepatoma cell lines. Cell apoptosis were detected by FCM, TUNEL labeling, agarose gel electrophoresis, transmission electron microscope. Expression of Bcl-2 and Bax at the protein and mRNA level were detected by immunocytochemical method(ICC) and RT-PCR. Activity of NF- k B and p38MAPK was determined by EMSA and Western blot. Orthotopic transplantation tu...