A small-molecule fusion inhibitor of influenza virus is orally active in mice.van Dongen, M.J.P., Kadam, R.U., Juraszek, J., Lawson, E., Brandenburg, B., Schmitz, F., Schepens, W.B.G., Stoops, B., van Diepen, H.A., Jongeneelen, M., Tang, C., Vermond, J., van Eijgen-Obregoso Real, A., Blokland, S., Garg, D., Yu, W., Goutier, W., Lanckacker, E., Klap, J.M., Peeters, D.C.G., Wu, J., Buyck, C., Jonckers, T.H.M., Roymans, D., Roevens, P., Vogels, R., Koudstaal, W., Friesen, R.H.E., Raboisson, P., Dhanak, D., Goudsmit, J., Wilson, I.A.
(2019) Science 363
- PubMed: 30846569
- DOI: 10.1126/science.aar6221
- Structures With Same Primary Citation
- PubMed Abstract:
Recent characterization of broadly neutralizing antibodies (bnAbs) against influenza virus identified the conserved hemagglutinin (HA) stem as a target for development of universal vaccines and therapeutics. Although several stem bnAbs are being eval ...
Recent characterization of broadly neutralizing antibodies (bnAbs) against influenza virus identified the conserved hemagglutinin (HA) stem as a target for development of universal vaccines and therapeutics. Although several stem bnAbs are being evaluated in clinical trials, antibodies are generally unsuited for oral delivery. Guided by structural knowledge of the interactions and mechanism of anti-stem bnAb CR6261, we selected and optimized small molecules that mimic the bnAb functionality. Our lead compound neutralizes influenza A group 1 viruses by inhibiting HA-mediated fusion in vitro, protects mice against lethal and sublethal influenza challenge after oral administration, and effectively neutralizes virus infection in reconstituted three-dimensional cell culture of fully differentiated human bronchial epithelial cells. Cocrystal structures with H1 and H5 HAs reveal that the lead compound recapitulates the bnAb hotspot interactions.
The Skaggs Institute for Chemical Biology, The Scripps Research Institute, La Jolla, CA, USA.