RT Journal Article
SR Electronic
T1 A modular platform for on-demand vaccine self-assembly enabled by decoration of bacterial outer membrane vesicles with biotinylated antigens
JF bioRxiv
FD Cold Spring Harbor Laboratory
SP 2021.08.24.457488
DO 10.1101/2021.08.24.457488
A1 Kevin B. Weyant
A1 Julie Liao
A1 Mariela Rivera-De Jesus
A1 Thapakorn Jaroentomeechai
A1 Tyler D. Moeller
A1 Steven Hoang-Phou
A1 Sukumar Pal
A1 Sean F. Gilmore
A1 Riya Singh
A1 David Putnam
A1 Christopher Locher
A1 Luis M. de la Maza
A1 Matthew A. Coleman
A1 Matthew P. DeLisa
YR 2021
UL http://biorxiv.org/content/early/2021/08/24/2021.08.24.457488.abstract
AB Engineered outer membrane vesicles (OMVs) derived from laboratory strains of bacteria are a promising technology for the creation of non-infectious, nanoparticle vaccines against diverse pathogens. As mimics of the bacterial cell surface, OMVs offer a molecularly-defined architecture for programming repetitive, high-density display of heterologous antigens in conformations that elicit strong B and T cell immune responses. However, antigen display on the surface of OMVs can be difficult to control and highly variable due to bottlenecks in protein expression and localization to the outer membrane of the host cell, especially for bulky and/or complex antigens. To address this shortcoming, we created a universal approach called AddVax (avidin-based dock- and-display for vaccine antigen cross (x)-linking) whereby virtually any antigen that is amenable to biotinylation can be linked to the exterior of OMVs whose surfaces are remodeled with multiple copies of a synthetic antigen receptor (SNARE) comprised of an outer membrane scaffold protein fused to a member of the avidin family. We show that SNARE-OMVs can be readily decorated with a molecularly diverse array of biotinylated subunit antigens, including globular and membrane proteins, glycans and glycoconjugates, haptens, lipids, and short peptides. When the resulting OMV formulations were injected in wild-type BALB/c mice, strong antigen-specific antibody responses were observed that depended on the physical coupling between the antigen and SNARE-OMV delivery vehicle. Overall, these results demonstrate AddVax as a modular platform for rapid self-assembly of antigen-studded OMVs with the potential to accelerate vaccine generation, respond rapidly to pathogen threats in humans and animals, and simplify vaccine stockpiling.Competing Interest StatementM.P.D. and D.P. have a financial interest in Versatope Therapeutics, Inc. and M.P.D. also has a financial interest in Glycobia, Inc., SwiftScale, Inc. and UbiquiTx, Inc. M.P.D.'s and D.P.'s interests are reviewed and managed by Cornell University in accordance with their conflict of interest policies. All other authors declare no competing interests.