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Improving the immunogenicity of native-like HIV-1 envelope trimers by hyperstabilization
de la Pena, Alba Torrents Julien, Jean-Philippe de Taeye, Steven W. Garces, Fernando Guttman, Miklos Ozorowski, Gabriel Pritchard, Laura K. Behrens, Anna-Janina Go, Eden P. Burger, Judith A.
de la Pena, Alba Torrents
Julien, Jean-Philippe
de Taeye, Steven W.
Garces, Fernando
Guttman, Miklos
Ozorowski, Gabriel
Pritchard, Laura K.
Behrens, Anna-Janina
Go, Eden P.
Burger, Judith A.
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Abstract
The production of native-like recombinant versions of the HIV-1 envelope glycoprotein (Env) trimer requires overcoming the natural flexibility and instability of the complex. The engineered BG505 SOSIP.664 trimer mimics the structure and antigenicity of native Env. Here, we describe how the introduction of new disulfide bonds between the glycoprotein (gp)120 and gp41 subunits of SOSIP trimers of the BG505 and other genotypes improves their stability and antigenicity, reduces their conformational flexibility, and helps maintain them in the unliganded conformation. The resulting next-generation SOSIP.v5 trimers induce strong autologous tier-2 neutralizing antibody (NAb) responses in rabbits. In addition, the BG505 SOSIP.v6 trimers induced weak heterologous NAb responses against a subset of tier-2 viruses that were not elicited by the prototype BG505 SOSIP.664. These stabilization methods can be applied to trimers from multiple genotypes as components of multivalent vaccines aimed at inducing broadly NAbs (bNAbs).
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2017-08-22
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Elsevier
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delaPena_CellRep_2017.pdf
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De la Peña, A. T., Julien, J.-P., de Taeye, S. W., Garces, F., Guttman, M., Ozorowski, G., … Sanders, R. W. (2017). Improving the immunogenicity of native-like HIV-1 envelope trimers by hyperstabilization. Cell Reports, 20(8), 1805–1817. http://doi.org/10.1016/j.celrep.2017.07.077