Protection against Influenza A Virus Challenge with M2e-Displaying Filamentous Escherichia coli Phages.

Autor: Lei Deng, Lorena Itatí Ibañez, Veronique Van den Bossche, Kenny Roose, Sameh A Youssef, Alain de Bruin, Walter Fiers, Xavier Saelens
Jazyk: angličtina
Rok vydání: 2015
Předmět:
Zdroj: PLoS ONE, Vol 10, Iss 5, p e0126650 (2015)
Druh dokumentu: article
ISSN: 1932-6203
DOI: 10.1371/journal.pone.0126650
Popis: Human influenza viruses are responsible for annual epidemics and occasional pandemics that cause severe illness and mortality in all age groups worldwide. Matrix protein 2 (M2) of influenza A virus is a tetrameric type III membrane protein that functions as a proton-selective channel. The extracellular domain of M2 (M2e) is conserved in human and avian influenza A viruses and is being pursued as a component for a universal influenza A vaccine. To develop a M2e vaccine that is economical and easy to purify, we genetically fused M2e amino acids 2-16 to the N-terminus of pVIII, the major coat protein of filamentous bacteriophage f88. We show that the resulting recombinant f88-M2e2-16 phages are replication competent and display the introduced part of M2e on the phage surface. Immunization of mice with purified f88-M2e2-16 phages in the presence of incomplete Freund's adjuvant, induced robust M2e-specific serum IgG and protected BALB/c mice against challenge with human and avian influenza A viruses. Thus, replication competent filamentous bacteriophages can be used as efficient and economical carriers to display conserved B cell epitopes of influenza A.
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