title: T cell vaccination eliminates antigen-specific T cells and prevents antigen-induced eosinophil recruitment into the tissue.
abstract: Asthma is characterized by airway inflammation with prominent eosinophil infiltrates. In a murine model of asthma, antigen-induced eosinophil recruitment into the airways of sensitized mice is mediated by CD4+ T cells and their cytokines, especially IL-5. In the present study, using ovalbumin-specific T cell receptor transgenic mice, we found that T cell vaccination, which was the administration of preactivated and attenuated antigen-specific T cells by the intraperitoneal route, prevented antigen-induced eosinophil recruitment into the airways. This effect was antigen-specific because ovalbumin-specific T cell vaccination did not affect BSA-induced eosinophil recruitment into the airways. We also found that antigen-specific IgE production as well as antigen-induced proliferation and cytokine production of splenocytes were diminished by T cell vaccination. Moreover, flow-cytometric analyses revealed that T cell vaccination eliminated antigen-specific T cells in the periphery. Together, these results indicate that T cell vaccination prevents antigen-induced eosinophil recruitment into the airways presumably by eliminating antigen-specific T cells.
authors.affiliation: Department of Internal Medicine II, Chiba University School of Medicine, Chiba, Japan.
authors.forename: M
authors.initials: M
authors.lastname: Kasai
authors.forename: K
authors.initials: K
authors.lastname: Kurasawa
authors.forename: H
authors.initials: H
authors.lastname: Nakajima
authors.forename: I
authors.initials: I
authors.lastname: Iwamoto
mesh_terms: D019264:Adoptive Transfer; D000818:Animals; D001249:Asthma / Q000276:immunology*; D015496:CD4-Positive T-Lymphocytes / Q000276:immunology* / Q000637:transplantation*; D002478:Cells, Cultured; D016207:Cytokines / Q000096:biosynthesis; D005260:Female; D019672:Genes, T-Cell Receptor; D007073:Immunoglobulin E / Q000096:biosynthesis; D008213:Lymphocyte Activation; D008212:Lymphocyte Depletion; D051379:Mice; D008807:Mice, Inbred BALB C; D008822:Mice, Transgenic; D010047:Ovalbumin / Q000276:immunology; D010446:Peptide Fragments / Q000276:immunology; D011657:Pulmonary Eosinophilia / Q000276:immunology*; D013154:Spleen / Q000276:immunology; D014611:Vaccination
chemical_list: D016207:Cytokines; C111390:OVA 323-339; D010446:Peptide Fragments; D007073:Immunoglobulin E; D010047:Ovalbumin