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首页> 外文期刊>Vaccine >Recombinant outer membrane vesicles to augment antigen-specific live vaccine responses.
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Recombinant outer membrane vesicles to augment antigen-specific live vaccine responses.

机译:重组外膜囊泡可增强抗原特异性活疫苗反应。

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摘要

Release of outer membrane vesicles is a common feature of Gram negative bacteria. There is growing interest in the use of these vesicles in the development of affordable vaccines. However, to exploit their full potential a convenient system to generate recombinant vesicles would be highly desirable. Here, we report the design of a versatile system for preparation of recombinant outer membrane vesicles based on an engineered autotransporter. Two model vaccine antigens of Leishmania were expressed as fusion proteins with the transporter domain of AIDA, the Escherichia coli adhesin involved in diffuse adhesion. Single subcutaneous injections of recombinant vesicles boosted vaccine antigen-specific antibody responses in mice primed with live recombinant salmonella vaccines by 6-40-fold. The results further show an expansion of only the vaccine antigen-specific antibody response indicating a great potential of this approach for prime boost vaccination strategies.
机译:外膜囊泡的释放是革兰氏阴性细菌的共同特征。在开发负担得起的疫苗中,越来越多地使用这些囊泡。然而,为了充分发挥其潜力,非常需要一种方便的系统来产生重组囊泡。在这里,我们报告了基于工程化的自转运蛋白,用于制备重组外膜囊泡的通用系统的设计。利什曼原虫的两种模型疫苗抗原被表达为具有AIDA转运蛋白结构域的融合蛋白,即大肠杆菌黏附蛋白与弥散性粘附有关。皮下注射重组囊泡的单次注射可将活重组沙门氏菌疫苗引发的小鼠疫苗抗原特异性抗体反应提高6-40倍。结果进一步显示仅疫苗抗原特异性抗体反应的扩展,表明该方法在初免加强免疫策略中具有巨大潜力。

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