The Antitumor Activity and Immunomodulatory Effects of Theasinesin

OBJECTIVE: To study the antitumor activity and immunomodulatory effects of theasinesin on mice transplanted tumor and tumor - bearing mice .METHODS: With three mice transplanted tumor models i.e. Ehrlich ascites tumor, sarcoma 180 and hepatic carcinoma hhz.we strdied the antitumor activity of theasinesin .The immunomodulatory effects of theasinesin on Smo~ bearing mice were measured by delayed type hypersensitivity(DTH), cleaning charcoal particles method, and splenocyte proliferation test .RESULTS: Theasinesin at doses of 400, 200, 50mg/kg could markedly inhibite the growth of Ehrlich ascites tumor(solid tumor) .Although theasinesin didn't have significant inhibitory effects on sarcoma 180 and hepatic carcinoma H22 in routine oral administration, the average inhibitory rates of each group,in manner of preventive administration, were all greater than 30% .Theasinesin at doses of 50,100,200mg/kg could significantly restore the decreased DTH in Siau180- bearing mice. It co-uld also markedly increase K, α and promote proliferation of activated T cells in S180- bearing mice .CONCLUSION:Theasinesin has significant inhibitory effects on mice transplanted tumors. It can also enhance the decreased immunological function on tu-mor- bearing mice.