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

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...

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Detalles Bibliográficos
Autores principales: Xu, Kai, Acharya, Priyamvada, Kong, Rui, Cheng, Cheng, Chuang, Gwo-Yu, Liu, Kevin, Louder, Mark K., O’Dell, Sijy, Rawi, Reda, Sastry, Mallika, Shen, Chen-Hsiang, Zhang, Baoshan, Zhou, Tongqing, Asokan, Mangaiarkarasi, Bailer, Robert T., Chambers, Michael, Chen, Xuejun, Choi, Chang W., Dandey, Venkata P., Doria-Rose, Nicole A., Druz, Aliaksandr, Eng, Edward T., Farney, Katie, Foulds, Kathryn E., Geng, Hui, Georgiev, Ivelin S., Gorman, Jason, Hill, Kurt R., Jafari, Alexander J., Kwon, Young D., Lai, Yen-Ting, Lemmin, Thomas, McKee, Krisha, Ohr, Tiffany Y., Ou, Li, Peng, Dongjun, Rowshan, Ariana P., Sheng, Zizhang, Todd, John-Paul, Tsybovsky, Yaroslav, Viox, Elise G., Wang, Yiran, Wei, Hui, Yang, Yongping, Zhou, Amy F., Chen, Rui, Yang, Lu, Scorpio, Diana G., McDermott, Adrian B., Shapiro, Lawrence, Carragher, Bridget, Potter, Clinton S., Mascola, John R., Kwong, Peter D.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6358635/
https://www.ncbi.nlm.nih.gov/pubmed/29867235
http://dx.doi.org/10.1038/s41591-018-0042-6
Descripción
Sumario: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.