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Sci Rep. 2017 Aug 9;7(1):7639. doi: 10.1038/s41598-017-07372-9.
The anti-influenza M2e antibody response is promoted by XCR1 targeting in pig skin.
Deloizy C1,2, Fossum E3, Barnier-Quer C4, Urien C1, Chrun T1, Duval A1,5, Codjovi M1,6, Bouguyon E1, Maisonnasse P1,7, Herv? PL1,8, Barc C9, Boulesteix O9, Pezant J9, Chevalier C1, Collin N4, Dalod M10, Bogen B3,11, Bertho N1, Schwartz-Cornil I12.
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Abstract
XCR1 is selectively expressed on a conventional dendritic cell subset, the cDC1 subset, through phylogenetically distant species. The outcome of antigen-targeting to XCR1 may therefore be similar across species, permitting the translation of results from experimental models to human and veterinary applications. Here we evaluated in pigs the immunogenicity of bivalent protein structures made of XCL1 fused to the external portion of the influenza virus M2 proton pump, which is conserved through strains and a candidate for universal influenza vaccines. Pigs represent a relevant target of such universal vaccines as pigs can be infected by swine, human and avian strains. We found that cDC1 were the only cell type labeled by XCR1-targeted mCherry upon intradermal injection in pig skin. XCR1-targeted M2e induced higher IgG responses in seronegative and seropositive pigs as compared to non-targeted M2e. The IgG response was less significantly enhanced by CpG than by XCR1 targeting, and CpG did not further increase the response elicited by XCR1 targeting. Monophosphoryl lipid A with neutral liposomes did not have significant effect. Thus altogether M2e-targeting to XCR1 shows promises for a trans-species universal influenza vaccine strategy, possibly avoiding the use of classical adjuvants.
PMID: 28794452 PMCID: PMC5550447 DOI: 10.1038/s41598-017-07372-9
Free PMC Article
The anti-influenza M2e antibody response is promoted by XCR1 targeting in pig skin.
Deloizy C1,2, Fossum E3, Barnier-Quer C4, Urien C1, Chrun T1, Duval A1,5, Codjovi M1,6, Bouguyon E1, Maisonnasse P1,7, Herv? PL1,8, Barc C9, Boulesteix O9, Pezant J9, Chevalier C1, Collin N4, Dalod M10, Bogen B3,11, Bertho N1, Schwartz-Cornil I12.
Author information
Abstract
XCR1 is selectively expressed on a conventional dendritic cell subset, the cDC1 subset, through phylogenetically distant species. The outcome of antigen-targeting to XCR1 may therefore be similar across species, permitting the translation of results from experimental models to human and veterinary applications. Here we evaluated in pigs the immunogenicity of bivalent protein structures made of XCL1 fused to the external portion of the influenza virus M2 proton pump, which is conserved through strains and a candidate for universal influenza vaccines. Pigs represent a relevant target of such universal vaccines as pigs can be infected by swine, human and avian strains. We found that cDC1 were the only cell type labeled by XCR1-targeted mCherry upon intradermal injection in pig skin. XCR1-targeted M2e induced higher IgG responses in seronegative and seropositive pigs as compared to non-targeted M2e. The IgG response was less significantly enhanced by CpG than by XCR1 targeting, and CpG did not further increase the response elicited by XCR1 targeting. Monophosphoryl lipid A with neutral liposomes did not have significant effect. Thus altogether M2e-targeting to XCR1 shows promises for a trans-species universal influenza vaccine strategy, possibly avoiding the use of classical adjuvants.
PMID: 28794452 PMCID: PMC5550447 DOI: 10.1038/s41598-017-07372-9
Free PMC Article