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单个癌细胞及其微环境与宿主整体之间的关系，对于治疗是至关重要的。生物反应调节剂胸腺因子D（TFD）及其和超氧化物歧化酶的复合制剂胸腺酶（TFS），对胃癌MGC803细胞生长的抑制试验表明，高浓度（4．0～0．5mg／ml）的抑制率均在50％以上，低浓度（0．25～0．0315mg／ml）的抑制率在48％～10％之间。人工胃液和人工肠液加入制剂中作用0．5～2h，对其抑制率无明显影响，TFD和TFS作用无明显区别。结果提示：TFD和TFS对胃癌MGC803细胞都有明显抑制作用，口服也有同样效果。
The relationship between a single cancer cell and its microenvironment and the host as a whole is crucial to treatment. Biological response modifier thymic factor D (TFD) and its combination with superoxide dismutase thymidine (TFS), inhibition of growth of gastric cancer MGC803 cells showed that high concentrations (4.0 ~ 0.5mg/ml) The inhibitory rate was above 50%, and the inhibitory rate of low concentration (0.25 to 0.0315 mg/ml) was between 48% and 10%. Artificial gastric juice and artificial intestinal fluid added to the preparation for 0.5 ~ 2h, no significant effect on the inhibitory rate, TFD and TFS role no significant difference. The results suggest that TFD and TFS have a significant inhibitory effect on gastric cancer MGC803 cells, and oral administration has the same effect.