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Activation patterns of murine T cells after oral administration of an enterocoated soluble antigen
S L Jain1, K S Barone, J G Michael
1Department of Molecular Genetics, Biochemistry, and Microbiology, University of Cincinnati, Ohio 45267-0524, USA.
An orally administered soluble protein antigen, ovalbumin (OVA), enterocoated with an acid-resistant acrylic polymer, induced a strong humoral immune response in BDF1 mice, exhibiting Th2 cell phenotype, typified by increased OVA-specific IgA, IgG1, and IgE antibody responses. This antibody response was accompanied by OVA-specific T cell proliferation response and IL-4 cytokine production. Mice fed enterocoated OVA and administered anti-IL-4 mAb showed a shift of the immune response toward the Th1 cell phenotype as evidenced by increased IFN-gamma production and anti-OVA IgG2a isotype antibody response. Additionally, in mice fed OVA solution and simultaneously administered anti-IL-4, we saw a slight but significant expression of Th1 cell phenotype. In conclusion, our data indicate that the dominance of Th2 cell phenotype in oral immunity is strongly influenced by the production and presence of IL-4.
An orally administered soluble protein antigen, ovalbumin (OVA), enterocoated with an acid-resistant acrylic polymer, induced a strong humoral immune response in BDF1 mice, exhibiting Th2 cell phenotype, typified by increased OVA-specific IgA, IgG1, and IgE antibody responses. This antibody response was accompanied by OVA-specific T cell proliferation response and IL-4 cytokine production. Mice fed enterocoated OVA and administered anti-IL-4 mAb showed a shift of the immune response toward the Th1 cell phenotype as evidenced by increased IFN-gamma production and anti-OVA IgG2a isotype antibody response. Additionally, in mice fed OVA solution and simultaneously administered anti-IL-4, we saw a slight but significant expression of Th1 cell phenotype. In conclusion, our data indicate that the dominance of Th2 cell phenotype in oral immunity is strongly influenced by the production and presence of IL-4.