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Infected atopic dermatitis lesions contain pharmacologic amounts of lipoteichoic acid  Jeffrey B. Travers, MD, PhD, Amal Kozman, MD, Nico Mousdicas, MD,

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Presentation on theme: "Infected atopic dermatitis lesions contain pharmacologic amounts of lipoteichoic acid  Jeffrey B. Travers, MD, PhD, Amal Kozman, MD, Nico Mousdicas, MD,"— Presentation transcript:

1 Infected atopic dermatitis lesions contain pharmacologic amounts of lipoteichoic acid 
Jeffrey B. Travers, MD, PhD, Amal Kozman, MD, Nico Mousdicas, MD, Chandan Saha, PhD, Megan Landis, MD, Mohammed Al- Hassani, MD, PhD, Weiguo Yao, MD, PhD, Yongxue Yao, MD, PhD, Ann-Marie Hyatt, MD, Michael P. Sheehan, MD, Anita N. Haggstrom, MD, Mark H. Kaplan, PhD  Journal of Allergy and Clinical Immunology  Volume 125, Issue 1, Pages e2 (January 2010) DOI: /j.jaci Copyright © 2010 American Academy of Allergy, Asthma & Immunology Terms and Conditions

2 Fig 1 Outline of research protocol. A, Outline of clinical protocol involving wash fluid derived from clinically impetiginized AD lesions (I.U., Indiana University). B, Typical subject with clinically impetiginized AD lesion at first visit, and second visit 2 weeks later after treatment with topical corticosteroid and oral antibiotic. Journal of Allergy and Clinical Immunology  , e2DOI: ( /j.jaci ) Copyright © 2010 American Academy of Allergy, Asthma & Immunology Terms and Conditions

3 Fig 2 Amounts of S aureus bacteria versus clinical assessment of inflammation and LTA levels in subjects with AD. Wash fluid obtained from 89 subjects at first visits (red circle) and 64 at 2-week follow-up visits (blue triangle) was assessed for amounts of S aureus bacteria, and this was compared with lesional EASI scores (A; Spearman correlation coefficients, visit 1, r = 0.21, P = .04; visit 2, r = 0.35, P = .005) and LTA levels (B; Spearman correlation coefficients, visit 1, r = 0.66, P < .001; visit 2, r = 0.53, P < .001). ND, not detectable. Journal of Allergy and Clinical Immunology  , e2DOI: ( /j.jaci ) Copyright © 2010 American Academy of Allergy, Asthma & Immunology Terms and Conditions

4 Fig 3 Amounts of LTA versus clinical assessment of inflammation in subjects with AD. A, Wash fluid obtained from 89 subjects at first visits (red circle) and 64 at 2-week follow-up visits (blue triangle) was assessed for amounts of LTA, and this was compared with lesional EASI scores (Spearman correlation coefficients, visit 1, r = 0.27, P = .01; visit 2, r = 0.28, P = .02). B, Wash fluid obtained from 79 subjects at first visits that was positive for S aureus was assessed for amounts of LTA, and this was compared with lesional EASI scores. The line depicts a concentration of LTA of 1 μg/cm3. ND, not detectable. Journal of Allergy and Clinical Immunology  , e2DOI: ( /j.jaci ) Copyright © 2010 American Academy of Allergy, Asthma & Immunology Terms and Conditions

5 Fig 4 Effect of intradermal LTA injections on epidermal cytokine mRNA levels in human skin. Human skin explants were treated with intradermal injections of 1 or 10 μg LTA, or PBS vehicle. Four or 24 hours later, the epidermis was removed and TNF, IL-6, and IL-8 mRNA measured and normalized to GAPDH mRNA levels. The data depicted are the mean ± SD normalized cytokine mRNA of LTA-treated skin relative to PBS control from triplicate samples of a representative experiment (from 3). ∗Statistically significant (P < .05) differences from PBS control–injected skin. CON, vehicle control. Journal of Allergy and Clinical Immunology  , e2DOI: ( /j.jaci ) Copyright © 2010 American Academy of Allergy, Asthma & Immunology Terms and Conditions

6 Cytokine levels versus LTA in clinically impetiginized AD lesions
Cytokine levels versus LTA in clinically impetiginized AD lesions. Wash fluid obtained from 89 subjects at first visits (red circle) and 64 at 2-week follow-up visits (blue triangle) were assessed for amounts of various cytokines, and this was compared with LTA levels. Journal of Allergy and Clinical Immunology  , e2DOI: ( /j.jaci ) Copyright © 2010 American Academy of Allergy, Asthma & Immunology Terms and Conditions


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