胰腺癌相关抗原MUC1与survivin mRNA联合转染树突细胞激发特异性细胞毒T淋巴细胞能力的体外研究  

In vitro study of induction of specific cytotoxic T lymphocytes by the dendritic cells co-transfected with pancreatic cancer-associated antigen MUC1 and survivin mRNA

作　　者：陈江[1] 郭晓钟[1] 李宏宇[1] 邵晓东[1] 王迪[1] 赵佳钧[1] 许文达[1] 

机构地区：[1]沈阳军区总医院消化科,沈阳110016

出　　处：《中华胰腺病杂志》2014年第4期217-222,共6页Chinese Journal of Pancreatology

基　　金：国家自然科学基金（81071982）

摘　　要：目的 研究人胰腺癌MUC1与survivin mRNA联合转染树突细胞（DC）体外激发特异性细胞毒T淋巴细胞（CTL）的能力,为构建负载多抗原表位DC疫苗治疗胰腺癌提供实验依据.方法 自6例胰腺癌患者外周血单核细胞中分离、培养并鉴定DC.常规培养人胰腺癌细胞株MiaPaCa-2,采用RT-PCR方法扩增MUC1和survivin mRNA.应用电穿孔法将两种mRNA单独或联合转染DC,分别命名为DC-MUC1、DC-survivin、DC-MUC1＋ survivin.采用实时定量PCR法检测DC的MUC1、survivin mRNA表达;四甲基偶氮唑蓝（MTT）法检测DC存活率;使用混合细胞培养法检测转染DC体外刺激自体T淋巴细胞的增殖能力;应用ELISA法检测转染DC体外激发抗原特异性CTL释放Th1型细胞因子IL-2、IL-10、granzyme B、IFN-γ的水平.结果 成功获得成熟的DC,成熟DC的表面标志物CD40、HLA-DR、CD83和CD86的阳性表达率分别为34.31％、50.21％、89.17％和73.62％.DC-MUC1的MUC1 mRNA表达量为36.24±5.17;DC-survivin的survivin mRNA表达量为34.53±4.02;DC-MUC1＋survivin的MUC1、survivin mRNA表达量分别为31.79±4.26和14.67±2.96,显著低于单转染的DC（P值均＜0.05）.DC-MUC1＋ survivin的存活率呈现时间依赖性下降,96 h时的存活率显著低于单转染DC（50.21％比80％左右,P值均＜0.05）.当作为刺激细胞的DC和作为效应细胞的T淋巴细胞比例为1∶10、1∶20时,DC-MUC1＋ survivin刺激自体T细胞的增殖指数显著高于单转染DC,差异有统计学意义（P值均＜0.05）;而比例为1∶40、1∶80时的增殖指数差异无统计学意义.当DC∶T为1∶10孵育14 d时,DC-MUC1、DC-survivin、DC-MUC1＋survivin的IL-2水平分别为（892.73±32.90）、（713.62±56.37）、（1884.37±95.21） pg/ml;granzyme B水平分别为（501.62±12.30）、（203.84±12.55）、（1193.15±86.04） pg/ml;IFN-γ水平分别为（981.50±47.82）、（696.05±41.66）、（2237.94±189.55） pg/ml.DC-MUC1＋ survivin显著高于单转染的DC,差异有统计学�Objective To investigate the ability of induction of specific cytotoxic T lymphocytes （CTL） stimulated by dendritic cells （DCs） co-transfected with MUC1 and survivin mRNA of human pancreatic cancer,and to provide the experimental basis for the treatment of human pancreatic cancer with multi-epitope DC vaccine.Methods DCs were isolated and cultured from peripheral blood mononuclear cells （PBMCs） of 6 patients with pancreatic cancer.Human pancreatic cancer cell line MiaPaCa-2 was routinely cultured,after being transcripted and amplified by RT-PCR,MUC1 and survivin mRNA were co-transfected or individually transfected into DCs by electroporation,and they were named as DC-MUC1,DC-survivin,DC-MUC1 ＋ survivin.The expression of MUC1 and survivin mRNA in DCs were detected by real-time PCR.The survival rate of transfected DCs were determined by MTT method.The lymphocyte proliferation ability was evaluated by mixed cell culture method.The Th1 cytokine releasing of antigen-specific CTLs were measured by ELISA assay.Results Mature DCs were obtained,the positive expression rates of surface markers CD40,HLA-DR,CD83 and CD86 were 34.31％,50.21％,89.17％ and 73.62％,respectively.The expression amount of MUC1 mRNA of DC-MUC1 was 36.24 ± 5.17,and the expression amount of survivin mRNA of DC-survivin was 34.53 ± 4.02,while the expression amounts of MUC1,survivin mRNA of DC-MUC1 ＋ surviving were 31.79 ±4.26 and 14.67 ± 2.96,which were significantly lower than that in individual transfection group （P ＜ 0.05）.The survival rate of DC-MUC1 ＋ surviving was decreased in a time dependent manner,which was significantly lower than that in individual transfection group （about 50.21％ vs 80％ at 24 h,P ＜0.05）.When DC/T cells ratio was 1∶ 10,1∶ 20,the autologous T cell proliferation index of MUC1 and survivin mRNA in co-transfection DC group was significantly higher than that in individual transfection group （P ＜ 0.05） ;when DC/T cells ratio was 1∶ 40,1∶ 80,the difference of proliferation ind

关 键 词：树突细胞 RNA转染 胰腺肿瘤 T淋巴细胞 细胞毒性 

分 类 号：R735.9[医药卫生—肿瘤]