Epitope-based vaccine design yields fusion peptide-directed antibodies that neutralize diverse strains of HIV-1.

Epitope-based vaccine design yields fusion peptide-directed antibodies that neutralize diverse strains of HIV-1.
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DOI:
10.1038/s41591-018-0042-6
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发表时间:
2018-06
期刊:
影响因子:
82.9
通讯作者:
Kwong PD
Kwong PD
中科院分区:
医学1区
文献类型:
--
作者:
Xu K;Acharya P;Kong R;Cheng C;Chuang GY;Liu K;Louder MK;O'Dell S;Rawi R;Sastry M;Shen CH;Zhang B;Zhou T;Asokan M;Bailer RT;Chambers M;Chen X;Choi CW;Dandey VP;Doria-Rose NA;Druz A;Eng ET;Farney SK;Foulds KE;Geng H;Georgiev IS;Gorman J;Hill KR;Jafari AJ;Kwon YD;Lai YT;Lemmin T;McKee K;Ohr TY;Ou L;Peng D;Rowshan AP;Sheng Z;Todd JP;Tsybovsky Y;Viox EG;Wang Y;Wei H;Yang Y;Zhou AF;Chen R;Yang L;Scorpio DG;McDermott AB;Shapiro L;Carragher B;Potter CS;Mascola JR;Kwong PD

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HIV-1疫苗研究的一个中心目标是诱导能够中和HIV-1的不同原代分离株的抗体。在这里,我们表明,通过融合肽偶联载体和融合前稳定的包膜三聚体免疫,将免疫反应集中于融合肽暴露的N-末端残基,这是病毒进入机制的关键组成部分,也是HIV-1感染引起的抗体表位,诱导交叉进化枝中和反应。在小鼠中,这些免疫原引发的单克隆抗体能够中和高达31%的208种HIV-1菌株的交叉进化枝。这些抗体的晶体和冷冻电子显微镜结构显示融合肽构象多样性作为交叉进化枝中和的分子解释。豚鼠和恒河猴的免疫诱导类似的广泛融合肽定向中和反应,表明可翻译性。因此,HIV-1融合肽的N末端是旨在引发广泛中和抗体的疫苗努力的有希望的靶标。
A central goal of HIV-1-vaccine research is the elicitation of antibodies capable of neutralizing diverse primary isolates of HIV-1. Here we show that focusing the immune response to exposed N-terminal residues of the fusion peptide, a critical component of the viral entry machinery and the epitope of antibodies elicited by HIV-1 infection, through immunization with fusion peptide-coupled carriers and prefusion-stabilized envelope trimers, induces cross-clade neutralizing responses. In mice, these immunogens elicited monoclonal antibodies capable of neutralizing up to 31% of a cross-clade panel of 208 HIV-1 strains. Crystal and cryo-electron microscopy structures of these antibodies revealed fusion peptide-conformational diversity as a molecular explanation for the cross-clade neutralization. Immunization of guinea pigs and rhesus macaques induced similarly broad fusion peptide-directed neutralizing responses suggesting translatability. The N terminus of the HIV-1-fusion peptide is thus a promising target of vaccine efforts aimed at eliciting broadly neutralizing antibodies.
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