Download MendeleyRestriction of HIV-1 Escape by a Highly Broad and Potent Neutralizing Antibody.
Schommers, P., Gruell, H., Abernathy, M.E., Tran, M.K., Dingens, A.S., Gristick, H.B., Barnes, C.O., Schoofs, T., Schlotz, M., Vanshylla, K., Kreer, C., Weiland, D., Holtick, U., Scheid, C., Valter, M.M., van Gils, M.J., Sanders, R.W., Vehreschild, J.J., Cornely, O.A., Lehmann, C., Fatkenheuer, G., Seaman, M.S., Bloom, J.D., Bjorkman, P.J., Klein, F.(2020) Cell 180: 471
- PubMed: 32004464
- DOI: https://doi.org/10.1016/j.cell.2020.01.010
- Primary Citation of Related Structures:
6UDJ, 6UDK - PubMed Abstract:
Broadly neutralizing antibodies (bNAbs) represent a promising approach to prevent and treat HIV-1 infection. However, viral escape through mutation of the HIV-1 envelope glycoprotein (Env) limits clinical applications. Here we describe 1-18, a new V H 1-46-encoded CD4 binding site (CD4bs) bNAb with outstanding breadth (97%) and potency (GeoMean IC 50 = 0.048 μg/mL). Notably, 1-18 is not susceptible to typical CD4bs escape mutations and effectively overcomes HIV-1 resistance to other CD4bs bNAbs. Moreover, mutational antigenic profiling uncovered restricted pathways of HIV-1 escape. Of most promise for therapeutic use, even 1-18 alone fully suppressed viremia in HIV-1-infected humanized mice without selecting for resistant viral variants. A 2.5-Å cryo-EM structure of a 1-18-BG505 SOSIP.664 Env complex revealed that these characteristics are likely facilitated by a heavy-chain insertion and increased inter-protomer contacts. The ability of 1-18 to effectively restrict HIV-1 escape pathways provides a new option to successfully prevent and treat HIV-1 infection.
Organizational Affiliation:
Laboratory of Experimental Immunology, Institute of Virology, Faculty of Medicine and University Hospital Cologne, University of Cologne, 50931 Cologne, Germany; Department I of Internal Medicine, Faculty of Medicine and University Hospital Cologne, University of Cologne, 50937 Cologne, Germany; German Center for Infection Research (DZIF), partner site Bonn-Cologne, 50931 Cologne, Germany.
