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Modifying the cellular transport of DNA-based vaccines alters the immune response to hantavirus nucleocapsid protein

机译:修改基于DNA的疫苗的细胞转运会改变对汉坦病毒核衣壳蛋白的免疫反应

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摘要

Puumala virus is a member of the hantavirus genus (family Bunyaviridae) and is one of the causative agents of hemorrhagic fever with renal syndrome (HFRS in Europe. A genetic vaccination approach was conducted to investigate if the immune response could be modulated using different cellular secretion and/or localisation signals, and the immune responses were analysed in BALB/c mice and in a bank vole infectious model. Rodents vaccinated with DNA constructs encoding the antigen fused to an amino-terminal secretion signal raised significantly higher antibody levels when compared to using constructs lacking secretion signals. Furthermore, the ratios of the IgG subclasses (IgG2a/IgG1) were raised by the use of cellular localisation signals, indicating a more pronounced Th1-type of immune response. The majority of the mice, or bank voles, immunised with DNA encoding a secreted form of the antigen showed a positive lymphoproliferative response and were protected against challenge with Puumala virus (strain Kazan-wt).
机译:Puumala病毒是汉坦病毒属(布尼亚病毒科)的成员,是肾综合征出血热的致病因子之一(欧洲HFRS),采用遗传疫苗接种方法研究是否可以通过不同的细胞分泌调节免疫应答和/或定位信号,并在BALB / c小鼠和岸田鼠传染性模型中分析了免疫反应,接种了编码与氨基端分泌信号融合的抗原的DNA结构的啮齿类动物与使用该疫苗的鼠相比,抗体水平明显提高此外,通过使用细胞定位信号提高了IgG亚类(IgG2a / IgG1)的比率,这表明免疫反应的Th1型更为明显,大多数小鼠或银行田鼠都进行了免疫带有编码抗原分泌形式的DNA的细胞显示出阳性的淋巴增生性反应,并受到保护以抵抗Puumal的攻击一种病毒(Kazan-wt毒株)。

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