在以融合肽为前体的 SHIV 感染猕猴体内发挥强效、广泛的 HIV-1 中和作用

IF 45.5 1区 生物学 Q1 BIOCHEMISTRY & MOLECULAR BIOLOGY Cell Pub Date : 2024-10-28 DOI:10.1016/j.cell.2024.10.003
Hua Wang, Cheng Cheng, James L. Dal Santo, Chen-Hsiang Shen, Tatsiana Bylund, Amy R. Henry, Colin A. Howe, Juyun Hwang, Nicholas C. Morano, Daniel J. Morris, Sergei Pletnev, Ryan S. Roark, Tongqing Zhou, Bryan T. Hansen, Forrest H. Hoyt, Timothy S. Johnston, Shuyi Wang, Baoshan Zhang, David R. Ambrozak, Jordan E. Becker, Peter D. Kwong
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引用次数: 0

摘要

基于抗体的 HIV-1 疫苗需要诱导强效的交叉反应性 HIV-1 中和反应。为了证明实现这一目标的可行性,我们将针对融合肽易感位点的疫苗接种与猿人免疫缺陷病毒(SHIV)感染相结合。在疫苗诱导中和反应的四只猕猴中,SHIV 感染将血浆中和浓度提高到了 45%-77% 的广度(几何平均 50% 抑制稀释 [ID50] ∼100)。通过抗体分离和低温电子显微镜(cryo-EM)结构测定对这些反应进行分子剖析后发现,在16种具有跨族中和作用的抗体系中,有15种是针对融合肽的易感部位的。在每只猕猴中,从记忆B细胞中分离出的抗体都再现了血浆中和反应,融合肽结合抗体的广度达到40%-60%(50%抑制浓度[IC50] <50微克/毫升),总系浓度估计为50-200微克/毫升。纵向映射表明,这些反应是在感染 SHIV 之前产生的。总之,这些结果提供了一个到几个 B 细胞系产生强效、广泛中和血浆反应的体内分子实例。
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Potent and broad HIV-1 neutralization in fusion peptide-primed SHIV-infected macaques
An antibody-based HIV-1 vaccine will require the induction of potent cross-reactive HIV-1-neutralizing responses. To demonstrate feasibility toward this goal, we combined vaccination targeting the fusion-peptide site of vulnerability with infection by simian-human immunodeficiency virus (SHIV). In four macaques with vaccine-induced neutralizing responses, SHIV infection boosted plasma neutralization to 45%–77% breadth (geometric mean 50% inhibitory dilution [ID50] ∼100) on a 208-strain panel. Molecular dissection of these responses by antibody isolation and cryo-electron microscopy (cryo-EM) structure determination revealed 15 of 16 antibody lineages with cross-clade neutralization to be directed toward the fusion-peptide site of vulnerability. In each macaque, isolated antibodies from memory B cells recapitulated the plasma-neutralizing response, with fusion-peptide-binding antibodies reaching breadths of 40%–60% (50% inhibitory concentration [IC50] < 50 μg/mL) and total lineage-concentrations estimates of 50–200 μg/mL. Longitudinal mapping indicated that these responses arose prior to SHIV infection. Collectively, these results provide in vivo molecular examples for one to a few B cell lineages affording potent, broadly neutralizing plasma responses.
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来源期刊
Cell
Cell 生物-生化与分子生物学
CiteScore
110.00
自引率
0.80%
发文量
396
审稿时长
2 months
期刊介绍: Cells is an international, peer-reviewed, open access journal that focuses on cell biology, molecular biology, and biophysics. It is affiliated with several societies, including the Spanish Society for Biochemistry and Molecular Biology (SEBBM), Nordic Autophagy Society (NAS), Spanish Society of Hematology and Hemotherapy (SEHH), and Society for Regenerative Medicine (Russian Federation) (RPO). The journal publishes research findings of significant importance in various areas of experimental biology, such as cell biology, molecular biology, neuroscience, immunology, virology, microbiology, cancer, human genetics, systems biology, signaling, and disease mechanisms and therapeutics. The primary criterion for considering papers is whether the results contribute to significant conceptual advances or raise thought-provoking questions and hypotheses related to interesting and important biological inquiries. In addition to primary research articles presented in four formats, Cells also features review and opinion articles in its "leading edge" section, discussing recent research advancements and topics of interest to its wide readership.
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