title: Systemic administration of antigen-pulsed dendritic cells induces experimental allergic asthma in mice upon aerosol antigen rechallenge.
abstract: Antigen-pulsed dendritic cells (DCs) have been used extensively as cellular vaccines to induce a myriad of protective immune responses. Adoptive transfer of antigen-pulsed DCs is especially effective at generating Th1 and CD8 immune responses. However, recently this strategy has been shown to induce Th2 cells when DCs are administered locally into the respiratory tract. We sought to address whether systemic rather than local antigen-pulsed DC administration could induce Th2 experimental allergic asthma. We found that OVA-pulsed splenic DCs injected intraperitoneally induced polarized Th2 allergic lung disease upon secondary OVA aerosol challenge. Disease was characterized by eosinophilic lung inflammation, excess mucus production, airway hyperresponsiveness, and OVA-specific IgG1 and IgE. In addition, unusual pathology characterized by macrophage alveolitis and multinucleated giant cells was observed. These data show that systemic administration of antigen-pulsed DCs and subsequent aeroantigen challenge induces Th2 immunity. These findings have important implications for the development of DC-based vaccines.
authors.affiliation: Division of Immunology, Allergy and Infectious Diseases, Department of Dermatology, VIRCC, University of Vienna Medical School, A-1235, Austria.
authors.forename: Sebastian J
authors.initials: SJ
authors.lastname: Graffi
authors.forename: Gerhard
authors.initials: G
authors.lastname: Dekan
authors.forename: Georg
authors.initials: G
authors.lastname: Stingl
authors.forename: Michelle M
authors.initials: MM
authors.lastname: Epstein
mesh_terms: D019264:Adoptive Transfer; D000336:Aerosols; D000818:Animals; D000941:Antigens / Q000008:administration & dosage; D001249:Asthma / Q000209:etiology* / Q000276:immunology / Q000473:pathology; D001992:Bronchoalveolar Lavage Fluid / Q000166:cytology / Q000276:immunology; D003713:Dendritic Cells / Q000276:immunology* / Q000637:transplantation*; D005260:Female; D051379:Mice; D008810:Mice, Inbred C57BL; D018345:Mice, Knockout; D010047:Ovalbumin / Q000008:administration & dosage / Q000276:immunology; D018417:Th1 Cells / Q000276:immunology; D018418:Th2 Cells / Q000276:immunology; D014185:Transplantation, Isogeneic
chemical_list: D000336:Aerosols; D000941:Antigens; D010047:Ovalbumin