title: Canine recombinant adenovirus vector induces an immunogenicity-related gene expression profile in skin-migrated CD11b⁺ -type DCs.
abstract: Gene expression profiling of the blood cell response induced early after vaccination has previously been demonstrated to predict the immunogenicity of vaccines. In this study, we evaluated whether the analysis of the gene expression profile of skin-migrated dendritic cells (DCs) could be informative for the in vitro prediction of immunogenicity of vaccine, using canine adenovirus serotype 2 (CAV2) as vaccine vector. CAV2 has been shown to induce immunity to transgenes in several species including sheep and is an interesting alternative to human adenovirus-based vectors, based on the safety records of the parental strain in dogs and the lack of pre-existing immunity in non-host species. Skin-migrated DCs were collected from pseudo-afferent lymph in sheep. Both the CD11b(+) -type and CD103(+) -type skin-migrated DCs were transduced by CAV2. An analysis of the global gene response to CAV2 in the two skin DC subsets showed that the gene response in CD11b(+) -type DCs was far higher and broader than in the CD103(+) -type DCs. A newly released integrative analytic tool from Ingenuity systems revealed that the CAV2-modulated genes in the CD11b(+) -type DCs clustered in several activated immunogenicity-related functions, such as immune response, immune cell trafficking and inflammation. Thus gene profiling in skin-migrated DC in vitro indicates that the CD11b(+) DC type is more responsive to CAV2 than the CD103(+) DC type, and provides valuable information to help in evaluating and possibly improving viral vector vaccine effectiveness.
authors.affiliation: Virologie et Immunologie Moléculaires, Institut National de la Recherche Agronomique, Jouy-en-Josas, France.
authors.forename: Vanessa
authors.initials: V
authors.lastname: Contreras
authors.forename: Céline
authors.initials: C
authors.lastname: Urien
authors.forename: Luc
authors.initials: L
authors.lastname: Jouneau
authors.forename: Mickael
authors.initials: M
authors.lastname: Bourge
authors.forename: Coraline
authors.initials: C
authors.lastname: Bouet-Cararo
authors.forename: Michel
authors.initials: M
authors.lastname: Bonneau
authors.forename: Stephan
authors.initials: S
authors.lastname: Zientara
authors.forename: Bernard
authors.initials: B
authors.lastname: Klonjkowski
authors.forename: Isabelle
authors.initials: I
authors.lastname: Schwartz-Cornil
mesh_terms: D006516:Adenoviruses, Canine / Q000235:genetics*; D000818:Animals; D015703:Antigens, CD / Q000378:metabolism; D039481:CD11b Antigen / Q000378:metabolism; D002465:Cell Movement / Q000276:immunology*; D004274:DNA, Recombinant / Q000235:genetics*; D003713:Dendritic Cells / Q000166:cytology / Q000276:immunology* / Q000378:metabolism; D004285:Dogs; D005260:Female; D005822:Genetic Vectors / Q000235:genetics*; D006801:Humans; D039001:Integrin alpha Chains / Q000378:metabolism; D012756:Sheep; D012867:Skin / Q000276:immunology*; D059467:Transcriptome / Q000276:immunology*; D014611:Vaccination
chemical_list: D015703:Antigens, CD; D039481:CD11b Antigen; D004274:DNA, Recombinant; D039001:Integrin alpha Chains; C091367:alpha E integrins