Epitope diversity of SARS-CoV-2 hyperimmune intravenous human immunoglobulins and neutralization of variants of concern.

Epitope diversity of SARS-CoV-2 hyperimmune intravenous human immunoglobulins and neutralization of variants of concern.
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SARS-CoV-2超免疫静脉注射人免疫球蛋白的表位多样性和相关变体的中和作用

DOI:
10.1016/j.isci.2021.103006
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发表时间:
2021-09-24
期刊:
影响因子:
5.8
通讯作者:
Khurana S
Khurana S
中科院分区:
综合性期刊2区
文献类型:
--
作者:
Tang J;Lee Y;Ravichandran S;Grubbs G;Huang C;Stauft CB;Wang T;Golding B;Golding H;Khurana S

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由 SARS-CoV-2 恢复期血浆 (CP) 产生的超免疫免疫球蛋白 (hCoV-2IG) 正在临床试验中进行评估。在这里,我们探索了针对 SARS-CoV-2 和新出现的关注变体 (VOC) 的抗体表位库,以及 6 个批次的 hCoV-2IG 以及 9 个 CP 的病毒中和能力。通过跨越 SARS-CoV-2 刺突的基因片段噬菌体展示文库进行的表位作图表明,对跨越整个刺突的多个抗原位点进行了广泛识别,hCoV-2IG 的识别率高于 CP,并且主要与融合肽结合。在假病毒中和测定和野生型 SARS-CoV-2 PRNT 测定中,与 CP 相比,hCoV-2IG 批次显示出针对 WA-1 毒株的更高滴度。 hCoV-2IG 批次对 VOC 的中和作用有不同程度的降低,但高于 CP。观察到 hCoV-2IG 与 RBD-E484K 的结合显着减少,其次是 RBD-N501Y(但不是 RBD-K417N)。这项研究表明,hCoV-2IG 暴露后治疗可能优于 CP。 SARS-CoV-2 hCoV-2IG 表现出高度多样化的抗体表位谱 SARS-CoV-2 hCoV-2IG 批次比 CP 更好地中和 SARS-CoV-2 变体 与未突变的 RBD 相比,hCoV-2IG 与 RBD-E484K 的结合显着减少 SARS-CoV-2 变体感染患者需要更高的 hCoV-2IG 剂量 生物科学;免疫学;免疫反应
Hyperimmune immunoglobulin (hCoV-2IG) generated from SARS-CoV-2 convalescent plasma (CP) are under evaluation in clinical trials. Here we explored the antibody epitope repertoire, and virus neutralizing capacity of six hCoV-2IG batches as well as nine CP against SARS-CoV-2 and emerging variants of concern (VOCs). Epitope-mapping by gene-fragment phage display library spanning the SARS-CoV-2 spike demonstrated broad recognition of multiple antigenic sites spanning the entire spike that was higher for hCoV-2IG than CP, with predominant binding to the fusion peptide. In the pseudovirus neutralization assay and in the wild-type SARS-CoV-2 PRNT assay, hCoV-2IG lots showed higher titers against the WA-1 strain compared with CP. Neutralization of VOCs were reduced to different extent by hCoV-2IG lots but were higher than CP. Significant reduction of hCoV-2IG binding was observed to RBD-E484K followed by RBD-N501Y (but not RBD-K417N). This study suggests that post-exposure treatment with hCoV-2IG could be preferable to CP. SARS-CoV-2 hCoV-2IG demonstrate highly diverse antibody epitope profile SARS-CoV-2 hCoV-2IG lots neutralized SARS-CoV-2 variants better than CP Significant reduction of hCoV-2IG binding to RBD-E484K compared with unmutated RBD Higher hCoV-2IG dose would be required for SARS-CoV-2 variant infected patients Biological sciences; Immunology; Immune response
危及生命的Covid-19患者中针对I型IFN的自身抗体。
DOI: 10.1126/science.abd4585
发表时间: 2020-10-23
期刊: Science (New York, N.Y.)
影响因子: --
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发表时间: 2021
期刊: PloS one
影响因子: 3.7
作者:
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DOI: 10.1371/journal.pmed.1000049
发表时间: 2009-04-21
期刊: PLoS medicine
影响因子: 15.8
作者:
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影响因子: 64.5
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影响因子: --
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