抗原致敏DC联合LAK细胞对肺腺癌细胞杀伤作用的研究

目的：观察抗原致敏树突状细胞（DC）联合淋巴因子激活的杀伤（LAK）细胞对肺腺癌细胞的杀伤作用。方法：采用密度梯度离心法分离出外周血单个核细胞（PBMC）,常规诱导出DC、LAK细胞。倒置显微镜观察细胞的形态和增殖情况;应用流式细胞仪（FCM）测定细胞表型上变化鉴定这两种细胞。流式细胞仪检测DC经抗原冲击和未经抗原冲击后其表型变化;利用四甲基偶氮唑蓝（MTT）检测法把DC-LAK细胞和DC-LAK-A549细胞作为效应细胞,肺腺癌A549细胞作为靶细胞,进行杀伤试验。结果：①体外诱导单个核细胞培养出DC和LAK细胞。②共培养后DC-LAK细胞的免疫表型表达增加。抗原致敏DC联合LAK细胞（DC-A549-LAK）组的免疫表型表达与对照组相比更有显著性意义。③共培养细胞在增殖倍率上有显著意义。④MTT显示共培养后的LAK细胞杀伤肿瘤细胞活性增强,抗原致敏后DC-A549-LAK抗肿瘤效应增强更显著。结论：从外周血单个核细胞中诱导出具有典型形态和免疫表型的DC和LAK细胞。DC和LAK细胞共培养细胞,增殖活性、免疫表型、杀伤活性方面高于单纯培养的LAK细胞。抗原致敏后DC-A549-LAK抗肿瘤效应增强更显著。

Research on the Effect of Dendritic Cells Combined with Lymphokine Activited Killer Cells on Cytotoxicity Against Lung Cancer Cells

Objective:To observe the effect of Dendritic Cells(DC) combined with Lymphokine Activited Kliller(LAK) Cells on Cytotoxicity against Lung Cancer Cells.Method: Density gradient centrifugation was used to separated peripheral blood mononuclear cells(PBMC),DC and LAK were conventional induced.Cell morphological and proliferation were observed by inverted microscope.By FCM(flow cytometry measurement) to measure the change of phenotype and identify two kinds of cells.To detect the change of phenotype of DC by ly...