In:
PLOS Pathogens, Public Library of Science (PLoS), Vol. 19, No. 8 ( 2023-8-28), p. e1011514-
Abstract:
Despite the availability of seasonal vaccines and antiviral medications, influenza virus continues to be a major health concern and pandemic threat due to the continually changing antigenic regions of the major surface glycoprotein, hemagglutinin (HA). One emerging strategy for the development of more efficacious seasonal and universal influenza vaccines is structure-guided design of nanoparticles that display conserved regions of HA, such as the stem. Using the H1 HA subtype to establish proof of concept, we found that tandem copies of an alpha-helical fragment from the conserved stem region (helix-A) can be displayed on the protruding spikes structures of a capsid scaffold. The stem region of HA on these designed chimeric nanoparticles is immunogenic and the nanoparticles are biochemically robust in that heat exposure did not destroy the particles and immunogenicity was retained. Furthermore, mice vaccinated with H1-nanoparticles were protected from lethal challenge with H1N1 influenza virus. By using a nanoparticle library approach with this helix-A nanoparticle design, we show that this vaccine nanoparticle construct design could be applicable to different influenza HA subtypes. Importantly, antibodies elicited by H1, H5, and H7 nanoparticles demonstrated homosubtypic and heterosubtypic cross-reactivity binding to different HA subtypes. Also, helix-A nanoparticle immunizations were used to isolate mouse monoclonal antibodies that demonstrated heterosubtypic cross-reactivity and provided protection to mice from viral challenge via passive-transfer. This tandem helix-A nanoparticle construct represents a novel design to display several hundred copies of non-trimeric conserved HA stem epitopes on vaccine nanoparticles. This design concept provides a new approach to universal influenza vaccine development strategies and opens opportunities for the development of nanoparticles with broad coverage over many antigenically diverse influenza HA subtypes.
Type of Medium:
Online Resource
ISSN:
1553-7374
DOI:
10.1371/journal.ppat.1011514
DOI:
10.1371/journal.ppat.1011514.g001
DOI:
10.1371/journal.ppat.1011514.g002
DOI:
10.1371/journal.ppat.1011514.g003
DOI:
10.1371/journal.ppat.1011514.g004
DOI:
10.1371/journal.ppat.1011514.g005
DOI:
10.1371/journal.ppat.1011514.g006
DOI:
10.1371/journal.ppat.1011514.g007
DOI:
10.1371/journal.ppat.1011514.g008
DOI:
10.1371/journal.ppat.1011514.s001
DOI:
10.1371/journal.ppat.1011514.s002
DOI:
10.1371/journal.ppat.1011514.s003
DOI:
10.1371/journal.ppat.1011514.s004
DOI:
10.1371/journal.ppat.1011514.s005
DOI:
10.1371/journal.ppat.1011514.s006
DOI:
10.1371/journal.ppat.1011514.s007
DOI:
10.1371/journal.ppat.1011514.s008
DOI:
10.1371/journal.ppat.1011514.s009
DOI:
10.1371/journal.ppat.1011514.s010
DOI:
10.1371/journal.ppat.1011514.s011
DOI:
10.1371/journal.ppat.1011514.s012
DOI:
10.1371/journal.ppat.1011514.s013
DOI:
10.1371/journal.ppat.1011514.s014
DOI:
10.1371/journal.ppat.1011514.s015
DOI:
10.1371/journal.ppat.1011514.s016
DOI:
10.1371/journal.ppat.1011514.s017
DOI:
10.1371/journal.ppat.1011514.s018
DOI:
10.1371/journal.ppat.1011514.s019
DOI:
10.1371/journal.ppat.1011514.s020
DOI:
10.1371/journal.ppat.1011514.s021
DOI:
10.1371/journal.ppat.1011514.s022
Language:
English
Publisher:
Public Library of Science (PLoS)
Publication Date:
2023
detail.hit.zdb_id:
2205412-1
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