文章基本信息

标题：Naturally Acquired Rift Valley Fever Virus Neutralizing Antibodies Predominantly Target the Gn Glycoprotein
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作者：Daniel Wright ; Elizabeth R. Allen ; Madeleine H.A. Clark 等
期刊名称：iScience
印刷版ISSN：2589-0042
出版年度：2020
卷号：23
期号：11
页码：1-17
DOI：10.1016/j.isci.2020.101669
语种：English
出版社：Elsevier
摘要：SummaryRift Valley fever (RVF) is a viral hemorrhagic disease first discovered in Kenya in 1930. Numerous animal studies have demonstrated that protective immunity is acquired following RVF virus (RVFV) infection and that this correlates with acquisition of virus-neutralizing antibodies (nAbs) that target the viral envelope glycoproteins. However, naturally acquired immunity to RVF in humans is poorly described. Here, we characterized the immune response to the viral envelope glycoproteins, Gn and Gc, in RVFV-exposed Kenyan adults. Long-lived IgG (dominated by IgG1 subclass) and T cell responses were detected against both Gn and Gc. However, antigen-specific antibody depletion experiments showed that Gn-specific antibodies dominate the RVFV nAb response. IgG avidity against Gn, but not Gc, correlated with nAb titers. These data are consistent with the greater level of immune accessibility of Gn on the viral envelope surface and confirm the importance of Gn as an integral component for RVF vaccine development.Graphical AbstractDisplay OmittedHighlights•Long-lasting antibodies, predominantly IgG1, target both RVFV glycoproteins•Gn is the principle target of the long-lived RVFV-neutralizing antibody response•IFNγ production from Gn/Gc-specific T cells is modestImmunology; Virology