肺癌可溶性抗原联合超抗原修饰致敏ＤＣ诱导抗瘤免疫的研究

目的　观察经肺癌肿瘤可溶性抗原（ＴＳＡ）和超抗原金黄色葡萄球菌肠毒素Ａ（ＳＥＡ）联合修饰致敏树突状细胞（ＤＣ）体外诱导抗肺癌的免疫效应。方法　３ｍｏｌ／Ｌ氯化钾提取法获得人肺癌细胞ＧＬＣ ８２的可溶性抗原；从人外周血单个核细胞（ＰＢＭＣ）中诱导扩增ＤＣ，并用流式细胞仪（ＦＣＭ）检测表型；以肺癌ＴＳＡ和ＳＥＡ联合修饰致敏的ＤＣ、单纯肺癌抗原致敏的ＤＣ和未经抗原修饰的ＤＣ分别与同种异体外周血Ｔ淋巴细胞共同孵育，刺激Ｔ淋巴细胞活化增殖（作为效应细胞分别称为ＴＳＡ-ＳＥＡ-ＤＣＬ、ＴＳＡ-ＤＣＬ、ＤＣＬ），直接活细胞计数法观察增殖倍数；ＭＴＴ法检测不同ＤＣ∶Ｔ淋巴细胞比例的效应细胞对靶细胞ＧＬＣ-８２的体外杀伤效应。结果　诱导出高表达ＣＤ１ａ、ＣＤ８０、ＨＬＡ-ＤＲ的ＤＣ，光镜下具有典型的ＤＣ特性；联合抗原修饰后的ＤＣ具有较强的免疫刺激活性，少量致敏ＤＣ即可强烈激发Ｔ细胞的增殖；ＴＳＡ-ＳＥＡ-ＤＣＬ对靶细胞ＧＬＣ-８２的杀伤率明显高于ＴＳＡ-ＤＣＬ及ＤＣＬ；联合抗原修饰的ＤＣ以１∶１００与Ｔ淋巴细胞共孵后的杀伤肿瘤细胞效应最强。结论　经肺癌ＴＳＡ和ＳＥＡ联合修饰致敏的ＤＣ可强烈激发同种异体Ｔ淋巴细胞活化增殖；肺癌ＴＳＡ联合超抗原ＳＥＡ诱导的ＤＣ疫苗对肺癌细胞有高效杀伤作用，经肺癌ＴＳＡ与超抗原ＳＥＡ联合修饰ＤＣ的活性明显强于单用肺癌ＴＳＡ。

Study on anti-tumor immunoreaction induced by dendritic cells modified by lung cancer soluble antigen and superantigen

Objective Through the study on anti-tumor immunoreaction against lung cancer induced by dendritic cells(DC) modified by lung cancer tumor soluble antigen(TSA) and superantigen(staphylococcal enterotoxin A,SEA) in vitro,we provide definite experiment basis for the clinical application of vaccine based on DC.Methods Through the experiment we got the soluble antigen polypeptide by 3mol/L potassium chloride.DCs were cultured and obtained from peripheral blood mononuclear cell.Phenotype of DC was identified by f...