细粒棘球绦虫重组Bb-Eg95-EgA31疫苗免疫小鼠后Th1/Th2型免疫应答的动态观察  

Dynamic observation on Th1/Th2 type immune response in mice immunized with recombinant Bb-Eg95-EgA31 vaccine of Echinococcus granulosus

作　　者：周必英[1] 陈雅棠[1] 李文桂[1] 杨梅[1] 

机构地区：[1]重庆医科大学附属第一医院传染病寄生虫病研究所,重庆400016

出　　处：《重庆医科大学学报》2010年第3期327-331,共5页Journal of Chongqing Medical University

基　　金：国家自然科学基金(编号:30801052和30671835)

摘　　要：目的:动态观察细粒棘球绦虫(Echinococcus granulosus,Eg)重组双歧杆菌(Bb)-Eg95-EgA31疫苗免疫小鼠后Th1/Th2型免疫应答的变化。方法:将5×108克隆形成单位(CFU)和5×105CFU疫苗分别采用口服灌胃和鼻腔内接种免疫BALB/c鼠,在免疫后2、4、6、8、10、12、14、16、18和20周各剖杀4只小鼠,收集血清,用ELISA法测定血清IgG及其亚类和IgE水平;无菌取脾,用ELISA法检测脾淋巴细胞培养上清液中IFN-γ、IL-12、TNF-α和IL-10水平。结果:口服免疫组小鼠血清IgG、IgG2a、IgG2b、IgG1、IgG3和IgE水平分别在免疫后8～10周、2～20周、2～20周、4～8周、6～12周和10周显著升高,脾淋巴细胞培养上清液中IFN-γ、IL-12、TNF-α和IL-10水平分别在免疫后2～16周、2～12周、2～6周和4～12周显著升高;鼻腔内接种组小鼠血清IgG、IgG2a、IgG2b、IgG1、IgG3和IgE水平分别在免疫后4～10周、4～20周、2～20周、2～12周、4～12周和10～12周显著升高,脾淋巴细胞培养上清液中IFN-γ、IL-12、TNF-α和IL-10水平分别在免疫后2～8周、2～12周、2～8周和6～16周显著升高。结论:细粒棘球绦虫重组Bb-Eg95-EgA31疫苗可诱导小鼠产生1个Th1/Th2混合型免疫应答。口服免疫和鼻腔内接种是两种较好的免疫途径,且前者优于后者。Objective：To dynamically observe changes of Th1/Th2 type immune responses in mice immunized with recombinant Bifidobacteria bifidum（Bb）-Eg95-EgA31 vaccine of Echinococcus granulosus（Eg）.Methods：BALB/c mice were vaccinated by 5×108 colony forming unit（CFU） orally and 5×105CFU intranasally respectively.Mice were killed on week 2,4,6,8,10,12,14,16,18 and 20 after immunization respectively,sera were collected to measure the levels of IgG,its subclasses and IgE by enzyme linked immunosorbent assay（ELISA）;Spleens were removed to determine the levels of IFN-γ,IL-12,TNF-αand IL-10 of splenocyte culture supernatant by ELISA.Results：Oral immunization mice showed higher levels of IgG,IgG2a,IgG2b,IgG1,IgG3 and IgE on the 8～10th week,2～20th week,2～20th week,4～8th week,6～12th week and 10th week respectively,while IFN-γ,IL-12,TNF-αand IL-10 on the 2～16th week,2～12th week,2～6th week and 4～12th week post vaccination respectively;Intranasal immunization mice showed higher levels of IgG,IgG2a,IgG2b,IgG1,IgG3 and IgE during the 4～10th week,4～20th week,2～20th week,2～12th week,4～12th week and 10～12th week respectively,while IFN-γ,IL-12,TNF-αand IL-10 on the 2～8th week,2～12th week,2～8th week and 6～16th week post vaccination respectively.Conclusion：Mixed Th1/Th2 type immune responses may be induced in mice immunized with the recombinant Bb-Eg95-EgA31 vaccine of Echinococcus granulosus.Oral and intranasal inoculation are two better immune routes,and the former is better than the latter.

关 键 词：细粒棘球绦虫 重组BB-EG95-EGA31疫苗 免疫球蛋白 TH1 TH2 细胞因子 

分 类 号：R383.3[医药卫生—医学寄生虫学]