Improved Immune Responses Against Zika Virus After Sequential Dengue and Zika Virus Infection in Humans.

Improved Immune Responses Against Zika Virus After Sequential Dengue and Zika Virus Infection in Humans.
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DOI:
10.3390/v10090480
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发表时间:
2018-09-07
期刊:
Viruses
影响因子:
--
通讯作者:
Roth C
Roth C
中科院分区:
其他
文献类型:
--
作者:
Delgado FG;Torres KI;Castellanos JE;Romero-Sánchez C;Simon-Lorière E;Sakuntabhai A;Roth C

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在寨卡病毒 (ZIKV) 流行地区,登革热病毒 (DENV) 血清流行率较高,而且这两种病毒之间存在交叉反应,这引起了人们对既往有登革热病毒感染史的患者患寨卡病毒疾病严重程度增加的风险的担忧。为了确定 DENV 免疫前在 ZIKV 感染中的作用,我们分析了先前感染或未感染过 DENV 的供体中针对 ZIKV 的 T 细胞和 B 细胞反应。使用生活在哥伦比亚流行区的捐赠者的外周血单核细胞 (PBMC),我们通过干扰素 (IFN)-γ 酶联免疫斑点 (ELISPOT) 测定,鉴定了非结构 (NS) 蛋白 NS1、NS3 和 NS5 中的大多数免疫显性 ZIKV T 细胞表位。对同一供体中 T 细胞和 B 细胞反应的分析表明,T 细胞针对 DENV 和 ZIKV 之间保守的肽有更强的反应,与未接触过 DENV 的供体相比,DENV 免疫供体中的 ZIKV 中和抗体水平更高。引人注目的是,与仅感染 DENV 的供体相比,连续感染 DENV 和 ZIKV 的供体中抗体介导的 ZIKV 感染增强的可能性降低。总而言之,这些数据表明,具有 DENV 免疫力的个体对 ZIKV 的免疫反应有所改善。
The high levels of dengue-virus (DENV) seroprevalence in areas where the Zika virus (ZIKV) is circulating and the cross-reactivity between these two viruses have raised concerns on the risk of increased ZIKV disease severity for patients with a history of previous DENV infections. To determine the role of DENV preimmunity in ZIKV infection, we analyzed the T- and B-cell responses against ZIKV in donors with or without previous DENV infection. Using peripheral blood mononuclear cells (PBMCs) from donors living in an endemic area in Colombia, we have identified, by interferon (IFN)-γ enzyme-linked immunospot (ELISPOT) assay, most of the immunodominant ZIKV T-cell epitopes in the nonstructural (NS) proteins NS1, NS3, and NS5. Analyses of the T- and B-cell responses in the same donors revealed a stronger T-cell response against peptides conserved between DENV and ZIKV, with a higher level of ZIKV-neutralizing antibodies in DENV-immune donors in comparison with DENV-naïve donors. Strikingly, the potential for antibody-mediated enhancement of ZIKV infection was reduced in donors with sequential DENV and ZIKV infection in comparison with donors with DENV infection only. Altogether, these data suggest that individuals with DENV immunity present improved immune responses against ZIKV.
DOI: 10.1038/ni.3515
发表时间: 2016-09
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影响因子: 30.5
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Dejnirattisai W;Supasa P;Wongwiwat W;Rouvinski A;Barba-Spaeth G;Duangchinda T;Sakuntabhai A;Cao-Lormeau VM;Malasit P;Rey FA;Mongkolsapaya J;Screaton GR
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