CD4+ T cells cross-reactive with dengue and Zika viruses protect against Zika virus infection

CD4+ T cells cross-reactive with dengue and Zika viruses protect against Zika virus infection
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CD4 T 细胞与登革热和寨卡病毒发生交叉反应,可预防寨卡病毒感染

DOI:
10.1016/j.celrep.2020.107566
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发表时间:
2020-04
期刊:
影响因子:
8.8
通讯作者:
Shresta Sujan
Shresta Sujan
中科院分区:
生物学1区
文献类型:
--
作者:
Wen Jinsheng;Wang Ying-Ting;Valentine Kristen M;Santos Alves Rubens Prince dos;Xu Zhigang;Regla-Nava Jose Angel;Ngono Annie Elong;Young Matthew;Ferreira Luis C.S;Shresta Sujan

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对登革病毒(DENV)的先前免疫提供针对相关黄病毒寨卡病毒(ZIKV)的交叉保护的潜在机制知之甚少。在这里,我们通过使用支持稳健的DENV和ZIKV复制的组织相容性白细胞抗原(HLA)-DRB 1 DRB 0101转基因、干扰素α/β受体缺陷型小鼠模型来检查DENV/ZIKV交叉反应性CD 4 +T细胞保护对抗与加剧ZIKV感染的能力。通过绘制HLA-DRB 1 α 0101限制性T细胞应答,我们鉴定了刺激干扰素γ(IFNγ)和/或肿瘤坏死因子(TNF)产生的DENV/ZIKV交叉反应性CD 4 +T细胞表位。用这些肽接种幼稚HLA-DRB 1转基因小鼠诱导足以降低ZIKV感染后组织病毒负荷的CD 4 +T细胞应答。值得注意的是,这种保护性应答需要IFNγ和/或TNF分泌,但不需要抗ZIKV免疫球蛋白G(IgG)产生。因此,产生典型Thl细胞因子的DENV/ZIKV交叉反应性CD 4 +T细胞可以以抗体非依赖性方式抑制ZIKV复制。这些结果可能对提高DENV/ZIKV疫苗的有效性和安全性以及开发泛黄病毒疫苗具有重要意义。
The underlying mechanisms by which prior immunity to dengue virus (DENV) affords cross-protection against the related flavivirus Zika virus (ZIKV) are poorly understood. Here, we examine the ability of DENV/ZIKV-cross-reactive CD4+T cells to protect against versus exacerbate ZIKV infection by using a histocompatibility leukocyte antigen (HLA)-DRB1∗0101 transgenic, interferon α/β receptor-deficient mouse model that supports robust DENV and ZIKV replication. By mapping the HLA-DRB1∗0101-restricted T cell response, we identify DENV/ZIKV-cross-reactive CD4+T cell epitopes that stimulate interferon gamma (IFNγ) and/or tumor necrosis factor (TNF) production. Vaccination of naive HLA-DRB1∗0101 transgenic mice with these peptides induces a CD4+T cell response sufficient to reduce tissue viral burden following ZIKV infection. Notably, this protective response requires IFNγ and/or TNF secretion but not anti-ZIKV immunoglobulin G (IgG) production. Thus, DENV/ZIKV-cross-reactive CD4+T cells producing canonical Th1 cytokines can suppress ZIKV replication in an antibody-independent manner. These results may have important implications for increasing the efficacy and safety of DENV/ZIKV vaccines and for developing pan-flavivirus vaccines.
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