Download MendeleyProtection of calves by a prefusion-stabilized bovine RSV F vaccine.
Zhang, B., Chen, L., Silacci, C., Thom, M., Boyington, J.C., Druz, A., Joyce, M.G., Guzman, E., Kong, W.P., Lai, Y.T., Stewart-Jones, G.B.E., Tsybovsky, Y., Yang, Y., Zhou, T., Baxa, U., Mascola, J.R., Corti, D., Lanzavecchia, A., Taylor, G., Kwong, P.D.(2017) NPJ Vaccines 2: 7-7
- PubMed: 29021918
- DOI: https://doi.org/10.1038/s41541-017-0005-9
- Primary Citation of Related Structures:
5TDG, 5TDL - PubMed Abstract:
Bovine respiratory syncytial virus, a major cause of respiratory disease in calves, is closely related to human RSV, a leading cause of respiratory disease in infants. Recently, promising human RSV-vaccine candidates have been engineered that stabilize the metastable fusion (F) glycoprotein in its prefusion state; however, the absence of a relevant animal model for human RSV has complicated assessment of these vaccine candidates. Here, we use a combination of structure-based design, antigenic characterization, and X-ray crystallography to translate human RSV F stabilization into the bovine context. A "DS2" version of bovine respiratory syncytial virus F with subunits covalently fused, fusion peptide removed, and pre-fusion conformation stabilized by cavity-filling mutations and intra- and inter-protomer disulfides was recognized by pre-fusion-specific antibodies, AM14, D25, and MPE8, and elicited bovine respiratory syncytial virus-neutralizing titers in calves >100-fold higher than those elicited by post-fusion F. When challenged with a heterologous bovine respiratory syncytial virus, virus was not detected in nasal secretions nor in respiratory tract samples of DS2-immunized calves; by contrast bovine respiratory syncytial virus was detected in all post-fusion- and placebo-immunized calves. Our results demonstrate proof-of-concept that DS2-stabilized RSV F immunogens can induce highly protective immunity from RSV in a native host with implications for the efficacy of prefusion-stabilized F vaccines in humans and for the prevention of bovine respiratory syncytial virus in calves.
Organizational Affiliation:
Vaccine Research Center, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA.
