【摘要】 目的 :研究多种细胞因子诱导的杀伤细胞 (Cytokine inducedkillcells ,CIK)对MGC 80 3胃癌细胞株的抗增殖和诱导凋亡作用 ,并探讨其作用机制。方法 :应用MTT法检测CIK细胞对MGC 80 3胃癌细胞株的抗增殖作用的影响及细胞毒活性 ;通过HE染色、扫描电镜和透射电镜观察凋亡细胞的形态学改变 ;通过免疫细胞化学法测定p5 3、p16、C myc的阳性表达率。结果 :MTT比色法表明随着CIK细胞与胃癌细胞效靶比增加及作用时间延长 ,抑制率明显增强 (P <0 0 1)。CIK细胞作用于胃癌细胞 2 4小时后 ,形态学观察胃癌细胞发生凋亡或坏死。CIK实验组p5 3、p16、C myc蛋白随作用时间延长表达均下降 ,与对照组相比均有显著性差异 (P <0 0 1)。结论 :CIK细胞是一种新型高效具有较强杀伤体外胃癌细胞的免疫活性细胞。其杀伤MGC 80 3胃癌细胞的作用机制之一可能是通过下调p5 3、C myc的蛋白表达。更多还原

【Abstract】 Objective:To study the anti proliferation and inducing apoptosis effects of cytokine induced killer cells CIK cells on MGC 803 gastric cancer cell lines and to probe its underlying mechanism.Methods:To detect the anti proliferation and the cytotoxicity of CIK cells on MGC 803 gastric cancer line by MTT assay.The morphological changes of the apoptosis cell were observed by HE stain, scanning and transmission electron microscope. The positive expression of p53, p16,C myc were determined by immunocytochemistry (ICC).Results:MTT assay showed that the inhibitive rate inhanced obviously with the addition of Effect/Target rate and extension of time ( P <0 01). Gastric cancer cells apoptosis or necrocytosis from morphological observe after gastric cancer cells were induced by CIK cells 24 hours. Expression of p53、p16、C myc protein in CIK experiment group inclined when time was continued and there were different significantly compared with control ( P <0 01).Conclusion:CIK cells are highly efficient cytolytic effector cells which have a stronger significant suppression against growth of carcinoma of stomach and the result provides an experimental basis for CIK to clinical application as a adoptive immunotherapy. One of the mechanisms can decline p53 and C myc proteins expression of tumor cells.CIK cells induce apoptosis of MGC 803 gastric cancer cell line in early phase and induce necrocytosis in late phase. [更多还原