title: Mucosal administration of completely non-replicative vaccinia virus recombinant Dairen I strain elicits effective mucosal and systemic immunity.
abstract: We studied the immunogenicity of completely replication-deficient vaccinia virus Dairen I strain recombinant encoding simian immunodeficiency virus (SIV) gag/pol (rDIs) in both mucosal and systemic compartments. When administered either intranasally or intragastrically, rDIs elicited enhanced levels of both SIV Gag p27-specific IgA antibodies and specific plasma antibodies, and the enhanced immunity persisted for the 1-year of observation by intranasal immunization. Increases were observed in antigen-specific IgA antibody-forming cells (AFC) in intestinal mucosal tissues and in IgG AFC in spleens. Furthermore, induction of type 1 and 2 helper cytokines in CD4+ spleen T cells and of CD8+ IFN-gamma spot-forming cells in mucosal tissues was observed in the intranasally immunized mice. Moreover, not even high-dose rDIs generated an SIV gene signal in the brain tissues of immunized mice. These findings suggest that mucosal immunization with the DIs recombinant hold promise as a safe mucosal vector.
authors.affiliation: Department of Microbiology, School of Medicine, Iwate Medical University, Iwate, Japan. nyoshino@iwate-med.ac.jp
authors.forename: N
authors.initials: N
authors.lastname: Yoshino
authors.forename: M
authors.initials: M
authors.lastname: Kanekiyo
authors.forename: Y
authors.initials: Y
authors.lastname: Hagiwara
authors.forename: T
authors.initials: T
authors.lastname: Okamura
authors.forename: K
authors.initials: K
authors.lastname: Someya
authors.forename: K
authors.initials: K
authors.lastname: Matsuo
authors.forename: Y
authors.initials: Y
authors.lastname: Ami
authors.forename: S
authors.initials: S
authors.lastname: Sato
authors.forename: N
authors.initials: N
authors.lastname: Yamamoto
authors.forename: M
authors.initials: M
authors.lastname: Honda
mesh_terms: D000281:Administration, Intranasal; D000818:Animals; D000914:Antibodies, Viral / Q000097:blood; D015496:CD4-Positive T-Lymphocytes / Q000276:immunology; D018414:CD8-Positive T-Lymphocytes / Q000276:immunology; D016207:Cytokines / Q000032:analysis / Q000276:immunology; D004797:Enzyme-Linked Immunosorbent Assay; D018928:Immunity, Mucosal / Q000187:drug effects / Q000276:immunology*; D007070:Immunoglobulin A / Q000097:blood; D007413:Intestinal Mucosa / Q000276:immunology / Q000821:virology; D051379:Mice; D008810:Mice, Inbred C57BL; D018449:SAIDS Vaccines / Q000008:administration & dosage / Q000276:immunology*; D015302:Simian Immunodeficiency Virus / Q000235:genetics / Q000276:immunology*; D013047:Specific Pathogen-Free Organisms; D018709:Statistics, Nonparametric; D014614:Vaccines, Synthetic / Q000008:administration & dosage / Q000276:immunology; D014616:Vaccinia virus / Q000235:genetics / Q000276:immunology*
chemical_list: D000914:Antibodies, Viral; D016207:Cytokines; D007070:Immunoglobulin A; D018449:SAIDS Vaccines; D014614:Vaccines, Synthetic