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包膜三聚体整合入复制型水疱性口炎病毒载体诱导 1 型 HIV 中和抗体。

Induction of Tier 1 HIV Neutralizing Antibodies by Envelope Trimers Incorporated into a Replication Competent Vesicular Stomatitis Virus Vector.

机构信息

Division of Virology, Medical University of Innsbruck, 6020 Innsbruck, Austria.

Christian Doppler Laboratory for Viral Immunotherapy of Cancer, Medical University of Innsbruck, 6020 Innsbruck, Austria.

出版信息

Viruses. 2019 Feb 15;11(2):159. doi: 10.3390/v11020159.


DOI:10.3390/v11020159
PMID:30769947
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6409518/
Abstract

A chimeric vesicular stomatitis virus with the glycoprotein of the lymphocytic choriomeningitis virus, VSV-GP, is a potent viral vaccine vector that overcomes several of the limitations of wild-type VSV. Here, we evaluated the potential of VSV-GP as an HIV vaccine vector. We introduced genes for different variants of the HIV-1 envelope protein Env, i.e., secreted or membrane-anchored, intact or mutated furin cleavage site or different C-termini, into the genome of VSV-GP. We found that the addition of the Env antigen did not attenuate VSV-GP replication. All HIV-1 Env variants were expressed in VSV-GP infected cells and some were incorporated very efficiently into VSV-GP particles. Crucial epitopes for binding of broadly neutralizing antibodies against HIV-1 such as MPER (membrane-proximal external region), CD4 binding site, V1V2 and V3 loop were present on the surface of VSV-GP-Env particles. Binding of quaternary antibodies indicated a trimeric structure of VSV-GP incorporated Env. We detected high HIV-1 antibody titers in mice and showed that vectors expressing membrane-anchored Env elicited higher antibody titers than vectors that secreted Envs. In rabbits, Tier 1A HIV-1 neutralizing antibodies were detectable after prime immunization and titers further increased after boosting with a second immunization. Taken together, VSV-GP-Env is a promising vector vaccine against HIV-1 infection since this vector permits incorporation of native monomeric and/or trimeric HIV-1 Env into a viral membrane.

摘要

一种嵌合的水疱性口炎病毒,其糖蛋白为淋巴细胞性脉络丛脑膜炎病毒(VSV-GP),是一种有效的病毒疫苗载体,克服了野生型 VSV 的几个局限性。在这里,我们评估了 VSV-GP 作为 HIV 疫苗载体的潜力。我们将 HIV-1 包膜蛋白 Env 的不同变体基因,即分泌型或膜锚定型、完整或突变的弗林裂解位点或不同的 C 末端,引入到 VSV-GP 的基因组中。我们发现,添加 Env 抗原不会减弱 VSV-GP 的复制。所有 HIV-1 Env 变体在感染 VSV-GP 的细胞中表达,并且一些变体非常有效地被整合到 VSV-GP 颗粒中。与 HIV-1 结合的广谱中和抗体的关键表位,如 MPER(膜近端外部区域)、CD4 结合位点、V1V2 和 V3 环,存在于 VSV-GP-Env 颗粒的表面。四价抗体的结合表明 VSV-GP 结合的 Env 是三聚体结构。我们在小鼠中检测到高 HIV-1 抗体滴度,并表明表达膜锚定 Env 的载体比分泌 Env 的载体诱导更高的抗体滴度。在兔子中,在初次免疫后可检测到 1A 类 HIV-1 中和抗体,在第二次免疫加强后,抗体滴度进一步增加。总之,VSV-GP-Env 是一种有前途的 HIV-1 感染疫苗载体,因为这种载体允许将天然的单体和/或三聚体 HIV-1 Env 掺入病毒膜中。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a637/6409518/73447269bd40/viruses-11-00159-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a637/6409518/8614de145f01/viruses-11-00159-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a637/6409518/8447709ed235/viruses-11-00159-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a637/6409518/e3200b20e18e/viruses-11-00159-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a637/6409518/a58f3567090f/viruses-11-00159-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a637/6409518/ebcc45f20178/viruses-11-00159-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a637/6409518/73447269bd40/viruses-11-00159-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a637/6409518/8614de145f01/viruses-11-00159-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a637/6409518/8447709ed235/viruses-11-00159-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a637/6409518/e3200b20e18e/viruses-11-00159-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a637/6409518/a58f3567090f/viruses-11-00159-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a637/6409518/ebcc45f20178/viruses-11-00159-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a637/6409518/73447269bd40/viruses-11-00159-g006.jpg

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引用本文的文献

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[2]
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Vaccines (Basel). 2024-8-1

[3]
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Vaccines (Basel). 2024-3-29

[4]
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[5]
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[7]
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[10]
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本文引用的文献

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