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The ectodomain of influenza matrix protein 2 (M2e) is a promising target for the development of universal prophylactic and therapeutic agents against influenza viruses of different subtypes. We constructed three M2e‐specific monoclonal antibody variants, M2A1‐1 (IgG1), M2A1‐2a (IgG2a), M2A1‐2b (IgG2b), which have the same Fab region targeting the M2e epitope but different isotypes, and compared their...
The extracellular domain of Influenza M2 protein (M2e) was considered as a promising target for universal influenza vaccine development. Several M2e-based influenza vaccines have been developed and many of them used a mutant M2e peptide, in which the two conserved cysteine residues were substituted by serine residues. In this paper, we compared the antigenicity and immunogenicity of wild type and...
There is urgent need to develop influenza vaccines with broad-spectrum protection against the potential influenza pandemic. The extracellular domain of influenza M2 protein (M2e) is considered as an appropriate target to induce heterosubtypic protection. We investigated the immunity and protection induced by combined vaccination with synthetic M2e peptide and traditional split influenza vaccine. The...
In this report, we investigated the adjuvant effect of CpG-ODN on the immunogenicity and protective efficacy of influenza M2e peptide vaccine. We found that the addition of CpG-ODN 1826 into aluminum-adjuvant M2e peptide vaccine increased M2e-specific Th1 immune response, indicated by higher titers of M2e-specific IgG2a and more IFN-γ-secreting lymphocytes. However, according to the result from virus...
The extracellular-domain of influenza Matrix 2 protein (M2e) is considered as a putative target for designing universal influenza vaccines. However, the mechanism by which M2-based vaccine induces protection has not been clear. In this study, we analyzed the immunity induced by free synthetic M2e peptide and found the peptide was highly immunogenic. Without carrier proteins, the synthetic M2e peptide...
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