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Repeated low-dose intradermal allergen injection suppresses allergen-induced cutaneous late responses  Giuseppina Rotiroti, MD, Mohamed Shamji, PhD, Stephen.

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Presentation on theme: "Repeated low-dose intradermal allergen injection suppresses allergen-induced cutaneous late responses  Giuseppina Rotiroti, MD, Mohamed Shamji, PhD, Stephen."— Presentation transcript:

1 Repeated low-dose intradermal allergen injection suppresses allergen-induced cutaneous late responses  Giuseppina Rotiroti, MD, Mohamed Shamji, PhD, Stephen R. Durham, MD, FRCP, Stephen J. Till, MRCP, PhD  Journal of Allergy and Clinical Immunology  Volume 130, Issue 4, Pages e1 (October 2012) DOI: /j.jaci Copyright © 2012 American Academy of Allergy, Asthma & Immunology Terms and Conditions

2 Fig 1 Outline of study design. At each visit, indicated intradermal injections with 0.1, 1, and 10 BU of grass (P pratense) pollen extract were performed. The early and late responses were measured after 20 minutes and 24 hours, respectively. Journal of Allergy and Clinical Immunology  , e1DOI: ( /j.jaci ) Copyright © 2012 American Academy of Allergy, Asthma & Immunology Terms and Conditions

3 Fig 2 Cutaneous late responses (24 hours) to intradermal injection of 10 BU of grass (P pratense) and birch (B verrucosa) pollen extract at the final visit (visit 6). Bars indicate mean values. Comparisons among the 3 groups at visit 6 were performed by using 1-way ANOVA with posttest individual comparisons performed with the Bonferroni multiple comparison test. **P < .01 and ***P < .001. Journal of Allergy and Clinical Immunology  , e1DOI: ( /j.jaci ) Copyright © 2012 American Academy of Allergy, Asthma & Immunology Terms and Conditions

4 Fig 3 Cutaneous early responses (20 minutes) to intradermal injection of 10 BU of grass (P pratense) and birch (B verrucosa) pollen extract at the final visit (visit 6). Bars indicate mean values. Comparisons among the 3 groups at visit 6 were performed by using 1-way ANOVA. Journal of Allergy and Clinical Immunology  , e1DOI: ( /j.jaci ) Copyright © 2012 American Academy of Allergy, Asthma & Immunology Terms and Conditions

5 Fig 4 Time course of suppression of allergen-induced late responses in group A subjects. Data shown represent the mean ± SEM area of late responses measured 24 hours after intradermal injection of 0.1, 1.0, or 10 BU of P pratense grass pollen extract at 6 repeat visits separated by 2-week intervals. For each allergen dose, significance was assessed by using repeated measures ANOVA, followed by posttest comparison with visit 1 (baseline) using the Bonferroni multiple comparison test. Journal of Allergy and Clinical Immunology  , e1DOI: ( /j.jaci ) Copyright © 2012 American Academy of Allergy, Asthma & Immunology Terms and Conditions

6 Fig 5 Effect of repeated intradermal injection with P pratense grass pollen extract on allergen-specific IgE and IgG titers together with inhibitory activity against IgE–grass pollen complex binding in the FAB assays. Sera were collected before intradermal injection at the visit shown and analyzed by using ELISA. For group A, significance was assessed by using repeated measures ANOVA, followed by posttest comparisons of different time points using the Bonferroni multiple comparison test. **P < .01. For group B, baseline and week 10 measurements were compared with the paired Student t test. Journal of Allergy and Clinical Immunology  , e1DOI: ( /j.jaci ) Copyright © 2012 American Academy of Allergy, Asthma & Immunology Terms and Conditions

7 Fig E1 Comparison of inhibition of early versus late responses after repeated intradermal grass pollen injections in group A. Data shown represent the mean ± SEM percentage inhibition of early- and late-response area at visit 6 compared with visit 1. Significance was assessed with the paired Student t test. ***P < EPR, Early-phase response; LPR, late-phase response. Journal of Allergy and Clinical Immunology  , e1DOI: ( /j.jaci ) Copyright © 2012 American Academy of Allergy, Asthma & Immunology Terms and Conditions

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