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M cell targeting with Aleuria aurantia lectin as a novel approach for oral allergen immunotherapy  Franziska Roth-Walter, PhD, Isabella Schöll, PhD, Eva.

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Presentation on theme: "M cell targeting with Aleuria aurantia lectin as a novel approach for oral allergen immunotherapy  Franziska Roth-Walter, PhD, Isabella Schöll, PhD, Eva."— Presentation transcript:

1 M cell targeting with Aleuria aurantia lectin as a novel approach for oral allergen immunotherapy 
Franziska Roth-Walter, PhD, Isabella Schöll, PhD, Eva Untersmayr, MD, Renate Fuchs, PhD, George Boltz-Nitulescu, PhD, Andrea Weissenböck, PhD, Otto Scheiner, PhD, Franz Gabor, PhD, Erika Jensen-Jarolim, MD  Journal of Allergy and Clinical Immunology  Volume 114, Issue 6, Pages (December 2004) DOI: /j.jaci Copyright © 2004 American Academy of Allergy, Asthma and Immunology Terms and Conditions

2 Fig 1 A, Adhesion of bare microspheres (1), AAL microspheres (2), or WGA microspheres (3) to Caco2 intestinal epithelial cells. Caco2 cells were incubated with the different types of fluorescein-cadaverine–labeled microspheres. Plasma membranes were localized with rabbit antialkaline phosphatase antibody and Alexa568 conjugated antirabbit IgG. Nuclei were stained with Hoechst dye. B, AAL microparticles (black bars) and WGA (gray bars) bound substantially better to a Caco2 monolayer than bare microspheres (white bars). The intestinal epithelial cell line Caco2 was grown in monolayers and incubated at 4°C with different microsphere preparations containing FITC-cadaverin. Cells with bound microspheres were dissolved and mean fluorescence (n=3) detected at 485/535 nm. rFU, Relative fluorescence units. Journal of Allergy and Clinical Immunology  , DOI: ( /j.jaci ) Copyright © 2004 American Academy of Allergy, Asthma and Immunology Terms and Conditions

3 Fig 2 Birch pollen–sensitized mice (n=8 per group) were treated orally with BP-loaded microparticles functionalized with AAL (black columns) or WGA (gray columns) or without functionalization (white columns). Sera before and after treatment were analyzed for BP-specific IgG1 titer, IgE, and IgA titers (μg/mL serum) in ELISA. ∗P < .05. Journal of Allergy and Clinical Immunology  , DOI: ( /j.jaci ) Copyright © 2004 American Academy of Allergy, Asthma and Immunology Terms and Conditions

4 Fig 3 Mice (n=8 per group) were sensitized to BP and afterward treated orally with BP-loaded microparticles. Splenocytes proliferated in all groups specifically to BP, but not with the control allergens of grass pollen (GP). Feedings of these mice were performed with BP-loaded AAL microparticles (dark gray columns), WGA microparticles (gray columns), or uncoated microparticles (white columns). cpm, Counts per minute. Journal of Allergy and Clinical Immunology  , DOI: ( /j.jaci ) Copyright © 2004 American Academy of Allergy, Asthma and Immunology Terms and Conditions

5 Fig 4 Supernatants of splenocytes of BP-sensitized mice (n=8 per group), which were treated orally with BP-loaded microparticles, were analyzed for cytokine contents. WGA-coated and AAL-coated microparticles produced significantly more IL-10 and IL-4 than feedings with bare, BP-loaded microparticles (MSBP). For IFN-γ, only AAL microspheres (AALMS) produced significant elevation of this cytokine. WGAMS, WGA microspheres. ∗P < .05. Journal of Allergy and Clinical Immunology  , DOI: ( /j.jaci ) Copyright © 2004 American Academy of Allergy, Asthma and Immunology Terms and Conditions


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