加味异功散减毒增效的实验研究

目的 探讨加味异功散减毒增效的机理。方法 采用小鼠移植性肝癌(H22)动物模型，进行加味异功散与化疗药物合用缓解化疗后免疫抑制和胃肠道损害作用进而增效的实验观察。给药8d，进行抑瘤率、IL-2和NK细胞活性、小肠组织MDA含量等的检测。结果 加味异功散与化疗药物联用后抑瘤率有一定程度提高；能显著提高荷瘤及化疗后小鼠的免疫功能，增加免疫器官重量，明显增强其IL-2和NK细胞活性；降低小肠组织中MDA含量。结论 加味异功散具有对化疗药增效减毒的功效，其作用机制与改善机体免疫功能、抗肠道自由基损伤等有关。

Experimental Studies on Attenuating and Synergic effects of Modified Yigong Powder

Objective To observe the effects of modified Yigong Powder (MYP) combined with chemotherapy on transplanted hepatocarcinoma of mice and to study its mechanisms. Methods Hepatocarcinoma 22 mouse model was established and then was used to observe the attenuating and synergic effects of MYP when applied together with 5-fluorouracil (5-FU). After 8 days of treatment,the tumor-inhibiting rate,activity of natural killer (NK)cells and interleukin-2 (IL-2) and small intestinal malondialdehyde (MDA) content were examined. Results MYP combined with 5-FU could increased the tumor-inhibiting rate to some extent and improve the immune function by increasing immune organ weight and increasing the activity of NK cells and IL-2. MYP combined with 5-FU could also reduce the 5-FU-induced intestinal injuries by relieving the damage of free radicals and inhibiting the lipid peroxidation and a good prognosis was expected in tumor-bearing animals treated with chemotherapy. Conclusion MYP exerts an attenuating and synergic effect when used together with 5-FU in treating tumor-bearing mice and its mechamism may be related to the improvement of immune function and reduction of intestinal injuries.