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Objecfive To observe the ability of dengue virus type 1-4 envelope domain Ⅲ fusion protein to inhibit virus infection and analyze the neutralizing ability of polyclonal antibodies against rEⅢ.Methods After being connected by linker peptide.EⅢ protein of Dengue virus serotypes 1-4 were expressed in E coli BL21(DE3) then purified.Fusion proteins were verified by Western Blot and ELISA.Rabbits were immunized with fusion proteins to produce anti-rE Ⅲ serum.The activity of anti-rEⅢ serum were detected through indirect immunofluorescence assay test.Inhibition of dengue virus type 1 to 4 infection in BHK-21 cells by rEⅢ fusion protein were tested.Neutralizing activity of anti-rEⅢ serum was analyzed.Results Dengue virus type 1 to 4 envelope domain Ⅲ recombinant fusion protein was expressed in Ecoli BL21 and purified successfully.Then rEⅢ fusion protein and anti-rEⅢ serum were analyzed respectively and rEⅢ fusion protein can effectively inhibit dengue virus type 1 to 4 from infecting BHK cells.The anti-rE Ⅲ serums can neutralize dengue virus type 1 to 4 but with different neutralizing titer.Conclusion Dengue virus type 1-4 envelope domain Ⅲ fusion protein can directly inhibit DV infeetion.Antibodies induced by rE Ⅲ fusion proteins can neutralize dengue virus type 1-4. 相似文献
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目的 了解2009—2022年全球人口流感病毒感染情况,分析流感病毒流行规律,为流感病毒的进一步研究和预防提供参考。方法 从世界卫生组织(WHO)公布的全球流感病毒感染数据中选取2009—2022年全球感染情况,采用统计描述和卡方检验分析流感病毒流行规律。结果流感病毒流行具有冬春季的特征;甲型流感病毒感染率显著高于乙型流感病毒;北半球流感病毒感染率显著高于南半球;新冠疫情暴发对流感病毒的传播和感染具有重要影响。结论 流感病毒给全球公共卫生安全带来严重威胁,因此需要对该病毒进行严密监控以降低大流行风险。 相似文献
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目的了解莱州市蜱的种类以及蜱携带发热伴血小板减少综合征新布尼亚病毒的感染状况,为证实当地发热伴血小板减少综合征的传播媒介提供科学依据。方法在莱州市有发热伴血小板减少综合征病例发生的自然村,收集动物体表的寄生蜱和采用布旗法收集野外的游离蜱,开展蜱的分类鉴定,并采用实时荧光定量PCR进行新布尼亚病毒的病原学检测。结果 2011年在莱州市共采集到2 593只蜱。按蜱的种类分类,莱州地区共采集到长角血蜱2 573只和血红扇头蜱6只,最低感染率分别为4.20%和16.67%;采集到铃头血蜱9只和中华革蜱5只,未检测到新布尼亚病毒核酸阳性。按照蜱的不同发育时期分类,共采集到成蜱1 449只、若蜱995只、幼蜱149只,成蜱、若蜱和幼蜱的最低感染率分别为4.07%、4.52%和2.68%;实验室培养期间收获22份卵,其中2份卵新布尼亚病毒核酸检测阳性,最低感染率为9.09%;按照动物来源分类,共采集羊蜱1 435只、狗蜱74只、牛蜱128只、鸡蜱61只、刺猬蜱24只,除鸡蜱、刺猬蜱未检测到新布尼亚病毒核酸外,羊蜱、狗蜱和牛蜱中SFTSV最低感染率分别为5.37%、12.16%和1.56%;野外采集蜱871只,最低感染率为2.18%。结论不同发育时期的蜱均有不同程度的新布尼亚病毒感染;长角血蜱、血红扇头蜱可能为新布尼亚病毒的传播媒介,且新布尼亚病毒具有垂直传播的可能。 相似文献
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目的 了解原核表达的登革病毒(Dengue virus,DV)1~4型融合的E蛋白结构域Ⅲ直接抑制登革病毒感染及其抗体的中和作用.方法 通过连接肽将1~4型登革病毒包膜蛋白Ⅲ区串联的基因产物插入PET30a在大肠埃希菌中进行表达、纯化后,应用Western Blot及间接ELISA验证表达产物.将融合蛋白免疫新西兰大白兔制备免疫血清,应用间接免疫荧光检测多抗血清的活性.将融合蛋白及多抗血清分别进行阻断实验和中和实验,对抗原及抗体的功能进行研究.结果 在大肠埃希菌中成功表达了串联的登革病毒1~4型E蛋白结构域Ⅲ融合蛋白,并得到兔抗免疫血清,分别对融合蛋白及兔抗免疫血清进行验证.融合蛋白能够阻断1~4型DV感染,兔抗免疫血清能中和1~4型DV,但中和抗体效价不同.结论 串联表达的登革病毒包膜蛋白Ⅲ区可抑制登革病毒感染,串联rEⅢ蛋白免疫新西兰大白兔产生的针对DV1~4型包膜蛋白结构域Ⅲ区的抗体对登革病毒具有中和作用. 相似文献
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Objecfive To observe the ability of dengue virus type 1-4 envelope domain Ⅲ fusion protein to inhibit virus infection and analyze the neutralizing ability of polyclonal antibodies against rEⅢ.Methods After being connected by linker peptide.EⅢ protein of Dengue virus serotypes 1-4 were expressed in E coli BL21(DE3) then purified.Fusion proteins were verified by Western Blot and ELISA.Rabbits were immunized with fusion proteins to produce anti-rE Ⅲ serum.The activity of anti-rEⅢ serum were detected through indirect immunofluorescence assay test.Inhibition of dengue virus type 1 to 4 infection in BHK-21 cells by rEⅢ fusion protein were tested.Neutralizing activity of anti-rEⅢ serum was analyzed.Results Dengue virus type 1 to 4 envelope domain Ⅲ recombinant fusion protein was expressed in Ecoli BL21 and purified successfully.Then rEⅢ fusion protein and anti-rEⅢ serum were analyzed respectively and rEⅢ fusion protein can effectively inhibit dengue virus type 1 to 4 from infecting BHK cells.The anti-rE Ⅲ serums can neutralize dengue virus type 1 to 4 but with different neutralizing titer.Conclusion Dengue virus type 1-4 envelope domain Ⅲ fusion protein can directly inhibit DV infeetion.Antibodies induced by rE Ⅲ fusion proteins can neutralize dengue virus type 1-4. 相似文献
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目的:探究山东省省内临床医学专业学位研究生科研能力培养现状以及培养过程中的问题。方法:选取山东省省内六所医学高校的临床医学专业学位研究生、导师和管理人员进行了问卷调查,并对有效问卷进行统计分析。结果:36.63%的研究生对自身的科研能力表示不太满意,81.90%的导师表示研究生的科研能力不够优秀。结论:山东省省内临床医学专业学位研究生科研能力培养现状不容乐观并在培养过程中存在诸多问题,本文就培养过程中存在的问题进行了详述并结合问卷调查结果提出了相关建议。 相似文献
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