OVX836 Heptameric Nucleoprotein Vaccine Generates Lung Tissue-Resident Memory CD8+ T-Cells for Cross-Protection Against Influenza.

OVX836 Heptameric Nucleoprotein Vaccine Generates Lung Tissue-Resident Memory CD8+ T-Cells for Cross-Protection Against Influenza.
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DOI:
10.3389/fimmu.2021.678483
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发表时间:
2021
影响因子:
7.3
通讯作者:
Nicolas F
Nicolas F
中科院分区:
医学2区
文献类型:
--
作者:
Del Campo J;Bouley J;Chevandier M;Rousset C;Haller M;Indalecio A;Guyon-Gellin D;Le Vert A;Hill F;Djebali S;Leverrier Y;Marvel J;Combadière B;Nicolas F

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组织驻留记忆(TRM)CD8+T细胞在预防流感感染中发挥着关键作用,但使用重组蛋白疫苗仍难以诱导。OVX836是将甲型流感病毒核蛋白(NP)的DNA序列与OVX313七聚体结构域的DNA序列融合而成的重组蛋白疫苗。我们之前证明了OVX836对流感病毒提供了广谱保护。在这里,我们发现OVX836肌肉注射(IM)诱导肺内产生NP特异性干扰素γ+T细胞的数量比突变NP(NPM)和野生型NP(NPWT)更多,后者分别形成单体和三聚体结构。OVX836可诱导细胞毒性CD8+T细胞和高频率的肺TRM CD8+T细胞,同时诱导至少90天对致死性流感病毒攻击的牢固保护。过继转移实验表明,OVX836疫苗接种后从肺和脾中分离出的NP特异性CD8+T细胞介导了对不同流感亚型的保护作用。OVX836可诱导大量NP特异的肺CD8+TRM-细胞,对流感病毒具有长期保护作用。
Tissue-resident memory (TRM) CD8+ T-cells play a crucial role in the protection against influenza infection but remain difficult to elicit using recombinant protein vaccines. OVX836 is a recombinant protein vaccine, obtained by the fusion of the DNA sequence of the influenza A nucleoprotein (NP) to the DNA sequence of the OVX313 heptamerization domain. We previously demonstrated that OVX836 provides broad-spectrum protection against influenza viruses. Here, we show that OVX836 intramuscular (IM) immunization induces higher numbers of NP-specific IFNγ-producing CD8+ T-cells in the lung, compared to mutant NP (NPm) and wild-type NP (NPwt), which form monomeric and trimeric structures, respectively. OVX836 induces cytotoxic CD8+ T-cells and high frequencies of lung TRM CD8+ T-cells, while inducing solid protection against lethal influenza virus challenges for at least 90 days. Adoptive transfer experiments demonstrated that protection against diverse influenza subtypes is mediated by NP-specific CD8+ T-cells isolated from the lung and spleen following OVX836 vaccination. OVX836 induces a high number of NP-specific lung CD8+ TRM-cells for long-term protection against influenza viruses.
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