Multifunctional human monoclonal antibody combination mediates protection against Rift Valley fever virus at low doses.

Multifunctional human monoclonal antibody combination mediates protection against Rift Valley fever virus at low doses.
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DOI:
10.1038/s41467-023-41171-3
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发表时间:
2023-09-13
影响因子:
16.6
通讯作者:
Crowe, James E., Jr.
Crowe, James E., Jr.
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Chapman, Nathaniel S.;Hulswit, Ruben J. G.;Westover, Jonna L. B.;Stass, Robert;Paesen, Guido C.;Binshtein, Elad;Reidy, Joseph X.;Engdahl, Taylor B.;Handal, Laura S.;Flores, Alejandra;Gowen, Brian B.;Bowden, Thomas A.;Crowe, James E., Jr.

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人畜共患裂谷热病毒(RVFV)可引起人类严重疾病,并具有大流行的潜力,但没有批准的疫苗或治疗方法存在。在这里,我们描述了一种双重机制的人单克隆抗体(mAb)组合对RVFV是有效的,在最小剂量的致死性小鼠感染模型。我们在结构上分析和表征了一个原型的有效的Gn结构域-A-结合抗体,阻断附件和抗体,抑制感染,通过废除融合过程,如前所述确定的结合模式。令人惊讶的是,Gn结构域-A抗体不直接阻断RVFV Gn与宿主受体低密度脂蛋白受体相关蛋白1(LRP 1)的相互作用,如通过竞争性测定所确定的。本研究确定了一种合理设计的人单克隆抗体组合,值得进一步研究用于人类抗RVFV感染。使用双管齐下的机制方法,我们证明了合理设计的组合mAb治疗方法的有效功效。目前没有治疗裂谷热病毒(RVFV)感染的选择。在这里,查普曼等人,显示靶向早期病毒细胞进入中的两个不同步骤的人单克隆抗体的组合增强了小鼠模型中的保护,并且在低剂量下有效。
The zoonotic Rift Valley fever virus (RVFV) can cause severe disease in humans and has pandemic potential, yet no approved vaccine or therapy exists. Here we describe a dual-mechanism human monoclonal antibody (mAb) combination against RVFV that is effective at minimal doses in a lethal mouse model of infection. We structurally analyze and characterize the binding mode of a prototypical potent Gn domain-A-binding antibody that blocks attachment and of an antibody that inhibits infection by abrogating the fusion process as previously determined. Surprisingly, the Gn domain-A antibody does not directly block RVFV Gn interaction with the host receptor low density lipoprotein receptor-related protein 1 (LRP1) as determined by a competitive assay. This study identifies a rationally designed combination of human mAbs deserving of future investigation for use in humans against RVFV infection. Using a two-pronged mechanistic approach, we demonstrate the potent efficacy of a rationally designed combination mAb therapeutic. There are currently no treatment options for infection with Rift Valley fever virus (RVFV). Here, Chapman et al., show that a combination of human monoclonal antibodies targeting two different steps in early virus cell entry enhances protection in a mouse model and is effective at low doses.
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