[Effects of four kinds of Chinese medicine monomer on growth of PANC-1 xenograft tumor and studying of molecular mechanism].

OBJECTIVE: The antitumor effects of icarisid II, timosaponin A-III, neferine and salidroside were studied in PANC-1 xenograft tumor.
METHOD: To establish of the nude mice xenograft tumor model, PANC-1 cells were injected. When the tumor major diameter was reached 3-5 mm, the treatment was initiated. The mice were randomized into vehicle control and treatment groups of six animals per each. Chinese medicine monomer was injected intraperitoneally every day. In 23th day, mice were killed once a day, tumor tissue were isolated and weighed and divided into two parts. One part was fixed with formaldehyde for tissue section and immunohistochemistry, the another of tissue was frozen in liquid nitrogen then in - 80 degrees C refrigerator for gene and protein expression analysis. RESULT: In PANC-1 tumor xenograft experiment, compared with model group, timosaponin A-III (1.0 mg x kg (-1)) exerted significant inhibitory effects on tumor growth. Timosaponin A-III suppressed mRNA expressions of VEGF (P < 0.05), reduced protein expressions of VEGF (P < 0.05), activated Caspase-3 protein. Icarisid II, neferine and salidroside had not an excelled antitumor effect.
CONCLUSION: Timosaponin A-III exerted an excelled antitumor effect. The antitumor mechanisms include anti-angiogenesis, apoptosis promotion.