Enhanced cross protection by hetero prime-boost vaccination with recombinant influenza viruses containing chimeric hemagglutinin-M2e epitopes.

Enhanced cross protection by hetero prime-boost vaccination with recombinant influenza viruses containing chimeric hemagglutinin-M2e epitopes.
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DOI:
10.1016/j.virol.2021.12.003
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发表时间:
2022-01
期刊:
影响因子:
3.7
通讯作者:
Kang SM
Kang SM
中科院分区:
医学3区
文献类型:
--
作者:
Park BR;Subbiah J;Kim KH;Kwon YM;Oh J;Kim MC;Shin CH;Seong BL;Kang SM

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每年重复接种流感疫苗引起了对不匹配病毒的保护效力的担忧。我们研究了异源初免-加强免疫接种对诱导交叉保护的影响,通过设计具有携带M2胞外结构域的嵌合血凝素(HA)的重组流感病毒(M2 e-HA)。用M2 e-HA嵌合病毒对C57 BL/6小鼠进行异源初免-加强疫苗接种比同源初免-加强疫苗接种更有效地诱导与交叉保护相关的M2 e和HA茎特异性IgG抗体。1岁小鼠中M2 e和HA茎特异性IgG抗体的诱导受损,表明对引发亚显性M2 e和HA茎IgG抗体应答的显著老化效应。本研究表明,与同源疫苗接种相比,使用表达额外M2 e表位的重组流感病毒的异源初免-加强策略提供更有效的交叉保护。
Annual repeat influenza vaccination raises concerns about protective efficacy against mismatched viruses. We investigated the impact of heterologous prime-boost vaccination on inducing cross protection by designing recombinant influenza viruses with chimeric hemagglutinin (HA) carrying M2 extracellular domains (M2e-HA). Heterologous prime-boost vaccination of C57BL/6 mice with M2e-HA chimeric virus more effectively induced M2e and HA stalk specific IgG antibodies correlating with cross protection than homologous prime-boost vaccination. Induction of M2e and HA stalk specific IgG antibodies was compromised in 1-year old mice, indicating significant aging effects on priming subdominant M2e and HA stalk IgG antibody responses. This study demonstrates that a heterologous prime-boost strategy with recombinant influenza virus expressing extra M2e epitopes provides more effective cross protection than homologous vaccination.
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