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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 Microbiol+Immunol
2020 ; 64
(1
): 33-51
Nephropedia Template TP
gab.com Text
Twit Text FOAVip
Twit Text #
English Wikipedia
Gold nanoparticle-adjuvanted S protein induces a strong antigen-specific IgG
response against severe acute respiratory syndrome-related coronavirus infection,
but fails to induce protective antibodies and limit eosinophilic infiltration in
lungs
#MMPMID31692019
Sekimukai H
; Iwata-Yoshikawa N
; Fukushi S
; Tani H
; Kataoka M
; Suzuki T
; Hasegawa H
; Niikura K
; Arai K
; Nagata N
Microbiol Immunol
2020[Jan]; 64
(1
): 33-51
PMID31692019
show ga
The spike (S) protein of coronavirus, which binds to cellular receptors and
mediates membrane fusion for cell entry, is a candidate vaccine target for
blocking coronavirus infection. However, some animal studies have suggested that
inadequate immunization against severe acute respiratory syndrome coronavirus
(SARS-CoV) induces a lung eosinophilic immunopathology upon infection. The
present study evaluated two kinds of vaccine adjuvants for use with recombinant S
protein: gold nanoparticles (AuNPs), which are expected to function as both an
antigen carrier and an adjuvant in immunization; and Toll-like receptor (TLR)
agonists, which have previously been shown to be an effective adjuvant in an
ultraviolet-inactivated SARS-CoV vaccine. All the mice immunized with more than
0.5?µg S protein without adjuvant escaped from SARS after infection with
mouse-adapted SARS-CoV; however, eosinophilic infiltrations were observed in the
lungs of almost all the immunized mice. The AuNP-adjuvanted protein induced a
strong IgG response but failed to improve vaccine efficacy or to reduce
eosinophilic infiltration because of highly allergic inflammatory responses.
Whereas similar virus titers were observed in the control animals and the animals
immunized with S protein with or without AuNPs, Type 1 interferon and
pro-inflammatory responses were moderate in the mice treated with S protein with
and without AuNPs. On the other hand, the TLR agonist-adjuvanted vaccine induced
highly protective antibodies without eosinophilic infiltrations, as well as
Th1/17 cytokine responses. The findings of this study will support the
development of vaccines against severe pneumonia-associated coronaviruses.