Promotion of Cellular and Humoral Immunity against Foot-and-Mouth Disease Virus by Immunization with Virus-Like Particles Encapsulated in Monophosphoryl Lipid A and Liposomes

文献类型： 外文期刊

第一作者： Kim, Woo Sik

作者： Kim, Woo Sik;Zhi, Yong;Byun, Eui-Baek;Seo, Ho Seong;Zhi, Yong;Seo, Ho Seong;Guo, Huichen;Lim, Jae Hyang;Lim, Jae Hyang

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关键词： foot-and-mouth disease; virus-like particles; vaccine; liposome; TLR4 agonist; immunogenicity

期刊名称：VACCINES （ 影响因子：4.422； 五年影响因子：5.513 ）

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年卷期： 2020 年 8 卷 4 期

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收录情况： SCI

摘要： Virus-like particles (VLPs) have emerged as promising vaccine candidates against foot-and-mouth disease (FMD). However, such vaccines provide a relatively low level of protection against FMD virus (FMDV) because of their poor immunogenicity. Therefore, it is necessary to design effective vaccine strategies that induce more potent immunogenicity. In order to investigate the means to improve FMD VLP vaccine (VLPFMDV) immunogenicity, we encapsulated VLPs (MPL/DDA-VLPFMDV) with cationic liposomes based on dimethyldioctadecylammonium bromide (DDA) and/or monophosphoryl lipid A (MPL, TLR4 agonist) as adjuvants. Unlike inactivated whole-cell vaccines, VLPFMDV were successfully encapsulated in this MPL/DDA system. We found that MPL/DDA-VLPFMDV could induce strong cell-mediated immune responses by inducing not only VLP-specific IFN-gamma(+)CD4(+) (Th1), IL-17A(+)CD4(+) (Th17), and IFN-gamma(+)CD8(+) (activated CD8 response) T cells, but also the development of VLP-specific multifunctional CD4(+) and CD8(+) memory T cells co-expressing IFN-gamma, TNF-alpha, and IL-2. In addition, the MPL/DDA-VLPFMDV vaccine markedly induced VLP-specific antibody titers; in particular, the vaccine induced greater Th1-predominant IgG responses than VLPFMDV only and DDA-VLPFMDV. These results are expected to provide important clues for the development of an effective VLPFMDV that can induce cellular and humoral immune responses, and address the limitations seen in current VLP vaccines for various diseases.

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