rAd5和rAAV2／1载体疫苗诱导载体特异性和外源基因特异性免疫反应的研究  

Study on vector-specific and foreign gene-speciflc immune responses induced by rAd5 and rAAV2/1 vaccines

作　　者：杨柳[1] 李芸[1] 杨玲[2] 张凌斐[1] 冯霞[2] 余双庆[2] 陈丹瑛[1] 李泽琳[1] 曾毅[2] 

机构地区：[1]北京工业大学生命科学与生物工程学院病毒与药理室,100022 [2]中国疾病预防控制中心病毒病预防控制所传染病预防控制国家重点实验室

出　　处：《中华实验和临床病毒学杂志》2011年第6期431-433,共3页Chinese Journal of Experimental and Clinical Virology

基　　金：国家自然科学基金（30872397）;国家科技重大专项（2008ZX10001-009）

摘　　要：目的 在小鼠体内比较携带相同外源基因的rAd5和rAAV2/1载体疫苗诱导的载体特异性和外源基因特异性免疫应答的差异.方法 分别用携带HIV-1 gag基因的rAd5和rAAV2/1疫苗免疫BALB/c小鼠,在免疫后不同时间点用Elispot方法和ELISA方法检测小鼠体内的rAd5或rAAV2/1载体特异性及HIV-1 gag特异性细胞免疫反应和抗体反应.结果 rAd5-gag能够诱导较强的gag特异性细胞免疫反应,显著高于针对Ad5载体的细胞免疫反应；而rAAV2/1 -gag诱导的gag特异性及AAV2/1载体特异性细胞免疫反应水平都较低.rAd5-gag诱导的P24特异性和Ad5特异性IgG抗体水平都较高,并且二者相当；与rAd5-gag相比rAAV2/1 -gag可诱导更高水平的P24 IgG抗体,而且rAAV2/1 -gag诱导的P24 igG高于AAV2/1载体特异性IgG水平.结论 rAd5载体可诱导强的外源基因特异性细胞免疫和抗体反应,针对载体的细胞免疫反应较弱而抗体反应较强；rAAV2/1载体可诱导强的外源基因特异性抗体反应,明显高于针对载体的抗体反应,外源基因特异性和载体特异性细胞免疫反应水平都很低.Objective To compare the foreign gene-specific and vector-specific immune responses in BALB/c mice immunized with rAd5 or rAAV2/1 expressing the same gene.Methods BALB/c mice were immunized with rAd5-gag or rAAV2/1-gag once,HIV-1 Gag-specific and vector- specific cellular immune responses were analyzed by Elispot assay,HIV-1 P24-specifc IgG and vector-specific IgG were tested by ELISA assay.Results Mice immunized with rAd5-gag induced potent Gag-specific cellular immune responses and that were significantly higher than Ad5-specfic cellular responses,while rAAV2/1-gag elicited weak Gag-specific and AAV2/1-specific cellular responses.Both P24-specific and Ad5-specific IgG titers induced by rAd5-gag were high and in similar level.Higher level of P24-specific IgG was found in mice inoculated with rAAV2/1-gag than rAd5-gag.And the P24-specific IgG titers were higher than the vectorspecific IgG titers in mice immunized with rAAV2/1.Conclusion rAd5 could elicit strong foreign genespecific cellular and humoral immune responses,weak vector-specific cellular responses and strong vectorspecific antibodies,rAAV2/1 could induce potent foreign gene-specific antibodies that were much higher than vector-specific IgG,while both foreign gene-specific and vector-specific cellular responses were very low.

关 键 词：腺病毒科 细小病毒科 免疫 细胞 抗体生成 HIV-1 

分 类 号：R392[医药卫生—免疫学]