体外构建的HTAHSP70BCG冲激的树突状细胞疫苗的抗肿瘤作用
11页1、1体外构建的 HTAHSP70BCG冲激的树突状细胞疫苗的抗肿瘤作用作者:孙光,郭连英,沈洁,刘丹丹,施广霞,钱振超【摘要 】 目的 观察体外构建的榄香烯复合瘤苗抗原 卡介苗热休克蛋白 70 复合物(HTAHSP70BCG )诱导的树突状细胞疫苗的抗肿瘤效应。方法 来源于小鼠的肝癌 HcaF 榄香烯复合疫苗的抗原(HTA )与卡介苗来源的 HSP70(HSP70BCG)在体外构建成HTAHSP70BCG 复合物,用 GMCSF 和 IL4 诱导树突状细胞(DCs ) ,分别用 HTAHSP70BCG、HTA 和 HSP70BCG 对其冲激。用 MTT 法检测该 DCs 刺激的全脾细胞的增殖活性及被刺激的脾细胞的细胞毒活性。用流式细胞仪检测 DCs 表面 CD86 和 CD40 的表达。结果 体外构建 HTAHSP70BCG 可以诱导 DCs 成熟,表现为DCs 表达 CD86 和 CD40 上调,该 DCs 可以刺激全脾细胞增殖并使其产生特异性杀瘤活性,其强度明显大于 HTA。结论 体外构建HTAHSP70BCG 复合物可以诱导 DCs 成熟,该 DCs 可以激活脾细胞产生较强的特异性
2、抗瘤效应。 【关键词】 热休克蛋白 70;树突状细胞;肿瘤瘤苗;抗瘤效应2基金项目:教育部高等学校骨干教师资助计划Antitumor Effects Induced by Dendritic Cell Vaccine Pulsed with HTAHSP70BCG Complex Reconstituted in VitroAbstract:Objective To investigate antitumor effects induced by dendritic cells (DCs) pulsed with complex of tumor antigen from elemenecombo tumor cell vaccineheat shock protein 70 of BCG (HTAHSP70BCG).Methods Tumor antigen peptides from elemenecombo HcaF cell (HTA) combined with HSP70BCG into HTAHSP70BCG in vitro. DCs were induced in m
3、edium with GMCSF and IL4 and pulsed with HTAHSP70BCG, HTA and HSP70BCG, respectively. The proliferation stimulating effects on unseparated splenocytes and the cytotoxicity of the splenocytes activated with DCs were evaluated with MTT assay. The expression of CD40 and CD86 on the surface of DCs was assessed by flow cytometer.Results Pulsing of HTAHSP70BCG resulted in DCs maturation, characterized by upregulation of CD86 and CD40. Proliferation index of unseparated splenocytes from HTAHSP70BCG gro
4、up was significantly increased as 3compared with HTA group. Unseparated splenocytes from DCs pulsed with HTAHSP70BCG revealed the cytotoxicity agaist HcaF, The HTA failed to reveal the cytotoxicity against HcaF.Conclusion HTAHSP70BCG could induce DCs maturation and the mature DCs could activate splenocytes to generate more potent specific antitumor effect.Key words: Heat shock protein70; Dendritic cell; Tumor vaccine;Antitumor effects0 引言热休克蛋白(Heat shock proteins,HSPs)是细胞受到应激时新合成或合成增加的一组蛋白质,被称为分
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