Nat Med:埃博拉病毒疫苗rVSV-ZEBOV的多克隆和趋向性抗体反应

2020-07-26 MedSci原创 MedSci原创

重组泡状口炎病毒-扎伊尔埃博拉病毒(rVSV-ZEBOV)是最先进的埃博拉病毒候选疫苗,目前正被用于对抗刚果民主共和国(DRC)爆发的埃博拉病毒病(EVD)。在此,我们通过进行全面的单B细胞和电子显微

重组泡状口炎病毒-扎伊尔埃博拉病毒(rVSV-ZEBOV)是最先进的埃博拉病毒候选疫苗,目前正被用于对抗刚果民主共和国(DRC)爆发的埃博拉病毒病(EVD)。在此,我们通过进行全面的单B细胞和电子显微镜结构分析,研究了参加1期rVSV-ZEBOV疫苗接种试验的人类志愿者子集的体液免疫反应。

4名被研究的疫苗接种者表现出多克隆,但可重复性和趋同的B细胞反应,具有共同的序列特征。EBOV靶向抗体与其他埃博拉病毒种类发生交叉反应,详细的表位图谱显示,目标表位与从EVD幸存者中分离的抗体有重叠。此外,在所有疫苗接种者中,我们检测到了高效力的EBOV中和抗体,其活性与目前临床试验中使用的单克隆抗体相当或更优。这些抗体包括结合IGHV3-15/IGLV1-40免疫球蛋白基因段的抗体,这些抗体在所有被调查的个体中都被发现。

总之,我们的发现将有助于评估和指导当前和未来的疫苗接种策略,并为新型EVD疗法提供机会。

原始出处:

Stefanie A EhrhardtMatthias Zehner, et al., Polyclonal and convergent antibody response to Ebola virus vaccine rVSV-ZEBOV. Nat Med. 2019 Oct;25(10):1589-1600. doi: 10.1038/s41591-019-0602-4.

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    2020-12-21 liye789132251
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    2020-09-27 aids221
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