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2015 ; 10
(9
): e0137822
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Cross Protection against Influenza A Virus by Yeast-Expressed Heterologous Tandem
Repeat M2 Extracellular Proteins
#MMPMID26366729
Lee YN
; Kim MC
; Lee YT
; Hwang HS
; Lee J
; Kim C
; Kang SM
PLoS One
2015[]; 10
(9
): e0137822
PMID26366729
show ga
The influenza M2 ectodomain (M2e) is well conserved across human influenza A
subtypes, but there are few residue changes among avian and swine origin
influenza A viruses. We expressed a tandem repeat construct of heterologous M2e
sequences (M2e5x) derived from human, swine, and avian origin influenza A viruses
using the yeast expression system. Intramuscular immunization of mice with
AS04-adjuvanted M2e5x protein vaccines was effective in inducing M2e-specific
antibodies reactive to M2e peptide and native M2 proteins on the infected cells
with human, swine, or avian influenza virus, mucosal and systemic memory cellular
immune responses, and cross-protection against H3N2 virus. Importantly, M2e5x
immune sera were found to confer protection against different subtypes of H1N1
and H5N1 influenza A viruses in naïve mice. Also, M2e5x-immune complexes of
virus-infected cells stimulated macrophages to secrete cytokines via Fc
receptors, indicating a possible mechanism of protection. The present study
provides evidence that M2e5x proteins produced in yeast cells could be developed
as a potential universal influenza vaccine.
|Amino Acid Sequence
[MESH]
|Animals
[MESH]
|Chick Embryo
[MESH]
|Cross Reactions
[MESH]
|Dogs
[MESH]
|Female
[MESH]
|Influenza A virus/immunology/*pathogenicity
[MESH]