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时间:2020-06-03
《肠道病毒71型手足口病的疫苗筛选和观察.pdf》由会员上传分享,免费在线阅读,更多相关内容在应用文档-天天文库。
1、中华实验和临床病毒学杂志2014年8月第28卷第4期ChineseJExpClinVirol,August2014,Vo1.28,No.4·245·.论著肠道病毒71型手足口病的疫苗筛选和观察姚思敏,杨桂林,刘威龙,方木通,周伯平【摘要】目的筛选安全有效新型EV71候选疫苗,为将来EV71疫苗开发应用奠定基础。方法以重组蛋白VP1为疫苗设计靶点,不同候选疫苗包括灭活疫苗、DNA疫苗、VP1蛋白疫苗在0、2周、4周分别按照不同剂量和肌内注射途径免疫BALB/c雌性小鼠,在0、2周、4周、6周、8周、10周、16周分别采集小鼠尾
2、静脉血,16周处死小鼠,收集小鼠脾脏细胞,检测小鼠体液免疫和细胞免疫功能,筛选评价候选疫苗的疗效和安全性。结果灭活病毒疫苗、VPIDNA质粒疫苗、VP1蛋白疫苗免疫小鼠2周后IgG抗体滴度即开始升高,4周后明显升高,8周后达高峰,至少维持16周以上;IgG亚类以IgG2a和IgGl为主。三种疫苗能诱导以-IFN和IL4为主的细胞免疫反应。灭活疫苗疗效优于其他候选疫苗,未发现疫苗相关不良反应。结论灭活病毒疫苗、VP1DNA质粒疫苗、VP1蛋白疫苗均能诱导持久的特异性细胞免疫和中和抗体反应,以灭活病毒疫苗疗效较好,需要将来攻毒实
3、验可进一步验证其免疫力。【主题词】肠道病毒属;手足口病Screeningofvaccinecandidatesforenterovirus71associatedhand,footandmouthdiseaseYaoSimin,y口Guilin,LiuWeilong,FangMutong,ZhouBoping.ShenzhenPeople’sHospital,Shenzhen518112,ChinaCorrespondingauthor:ynGuilin,Email:g1.yang@163.corn【Abstract】Obj
4、ectiveToScreenforsafeandeffectivevaccinecandidatesforEV71,provideatheoreticalbasisfordevelopmentofEV71vaccinesinthefuture.MethodsVP1geneofenteroviruswasusedtodesignatargetfordevelopmentofEVT1vaccines.Differentvaccinecandidates,includinginactivatedEV71vaccines,VP1pr
5、oteinvaccine,DNAvaccinesofdifferentdoses,wereusedtochallengefemaleBALB/cmicebyintramuscularinjectionatbaseline(0),2weeks,4weeks,andcaudalveinbloodwascollectedat0,2,4,6,8,10,and16weeks,andBALB/cmiceweresacrificedandthespleencellswerecollectedfordetectionofbothhumora
6、limmunityandcellularimmunitytoevaluatetheefficacyandsafetyofthevaccinecandidates.ResultsIgGantibodytiterswereincreasedat2weeks.remarkablyincreasedat4weeks,reachedapeakat8weeks,atleastsustainedfor16weeksduringthewholeobservationperiod,subtypesofIgG1andIgG2awerethema
7、jorcomponent.ThethreevaccinescouldinducecellularimmunitycharacterizedbyEV71specific一IFNandIL一4production.OurresultsindicatedthatinactivatedEV71vaccinewassuperiortotheothervaccinecandidates.ConclusionsInactivatedEV71vaccines.VP1proteinvaccine.DNAvaccinescaninducebot
8、hstrongandsustainablehumoralandcellularimmunitiesinchallengedmice.andtheinactivatedEV71vaccineiSsuperiortotheothervaccinecandidates,whichneedstob
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