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Flagellin adjuvanted F1/V subunit plague vaccine induces T cell and functional antibody responses with unique gene signatures.
npj Vaccines ( IF 6.9 ) Pub Date : 2020-01-23 , DOI: 10.1038/s41541-020-0156-y
Fahreta Hamzabegovic 1 , Johannes B Goll 2 , William F Hooper 2 , Sharon Frey 1 , Casey E Gelber 2 , Getahun Abate 1
Affiliation  

Yersinia pestis, the cause of plague, could be weaponized. Unfortunately, development of new vaccines is limited by lack of correlates of protection. We used pre- and post-vaccination sera and peripheral blood mononuclear cells from a flagellin adjuvanted F1/V vaccine trial to evaluate for protective markers. Here, we report for the first time in humans that inverse caspase-3 levels, which are measures of protective antibody, significantly increased by 29% and 75% on days 14 and 28 post-second vaccination, respectively. In addition, there were significant increases in T-cell responses on day 28 post-second vaccination. The strongest positive and negative correlations between protective antibody levels and gene expression signatures were identified for IFNG and ENSG00000225107 genes, respectively. Flagellin/F1/V subunit vaccine induced macrophage-protective antibody and significant CD4+ T-cell responses. Several genes associated with these responses were identified that could serve as potential correlates of protection.

中文翻译:


鞭毛蛋白佐剂 F1/V 亚单位鼠疫疫苗可诱导具有独特基因特征的 T 细胞和功能性抗体反应。



鼠疫的致病菌鼠疫耶尔森氏菌可以被武器化。不幸的是,新疫苗的开发因缺乏保护相关性而受到限制。我们使用来自鞭毛蛋白佐剂 F1/V 疫苗试验的疫苗接种前和疫苗后血清和外周血单核细胞来评估保护性标记。在这里,我们首次在人类中报告,反向 caspase-3 水平(保护性抗体的衡量标准)在第二次疫苗接种后第 14 天和第 28 天分别显着增加了 29% 和 75%。此外,第二次疫苗接种后第 28 天,T 细胞反应显着增加。分别针对 IFNG 和 ENSG00000225107 基因确定了保护性抗体水平与基因表达特征之间最强的正相关性和负相关性。鞭毛蛋白/F1/V 亚单位疫苗诱导巨噬细胞保护性抗体和显着的 CD4+ T 细胞反应。确定了与这些反应相关的几个基因,可以作为保护的潜在相关因素。
更新日期:2020-01-23
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