细胞因子对肾癌荷瘤裸鼠生长抑素的影响

为研究细胞因子对肾癌宿主体内生长抑素（ＳＳ）的影响及相互关系，探索肾癌治疗的更好方法，作者以４．４×１０６ｍｌＲＣＣ９４６１６人肾癌细胞注入裸鼠背部皮下，将荷瘤裸鼠随机分为ＴＮＦ、ＩＬ－２、ｒＩＦＮ、ＴＮＦ加ＩＬ－２、ＴＮＦ加ｒＩＦＮ及对照组。分别给药，实验结束时取血０．５～０．８ｍｌ，及瘤体、瘤旁和正常组织各１ｇ，放免法测定ＳＳ浓度。结果显示各细胞因子均可改变各组织中的ＳＳ浓度，以ＴＮＦ加ＩＬ－２组最明显（Ｐ＜０．０１）。作者认为，ＳＳ的分布受细胞因子的影响，这一影响可能是通过调节机体的免疫机制和对肿瘤的杀伤作用而产生的。研究提示将ＴＮＦ、ＩＬ－２、ＳＳ联合应用可能会对肾癌的生物治疗更有效

Effects of cytokines on somatostatin in nude mice bearing human renal cell carcinoma

We studied the relationship between the production of SS and treatment with cytokines and a new method for the treatment of renal cell carcinoma. 4.4 x 10(6)RCC94616 cells were injected subcutaneously into the back of nude mice. Five groups with TNF, IL-2, rIFN, TNF + IL-2, TNF + rIFN and controls were randomly divided according to the mean diameter of experimental tumor. After the last injection of cytokines, 0.5-0.8 ml blood, 1g tumor tissue, para-tissue and normal tissue were havested respectively. Contents of SS were tested by radioimmunoassay. In the treatment groups with cytokines, the concentration of SS was changed, siginificantly increased in the TNF + IL-2 group (P < 0.01). The effect on distribution of SS by cytokines may also be mediated by the regulation of human immunity and antitumor activity. It may be suggested that the method of TNF + IL-2 + SS is best to treat renal cell carcinoma.