Platelets constitutively express IL-33 protein and modulate eosinophilic airway inflammation Tomohiro Takeda, PhD, Hirotoshi Unno, MD, PhD, Hideaki Morita,

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Presentation transcript:

Platelets constitutively express IL-33 protein and modulate eosinophilic airway inflammation Tomohiro Takeda, PhD, Hirotoshi Unno, MD, PhD, Hideaki Morita, MD, PhD, Kyoko Futamura, MD, PhD, Maiko Emi-Sugie, PhD, Ken Arae, PhD, Tetsuo Shoda, MD, PhD, Naoko Okada, PhD, Arisa Igarashi, PhD, Eisuke Inoue, PhD, Hiroshi Kitazawa, MD, PhD, Susumu Nakae, PhD, Hirohisa Saito, MD, PhD, Kenji Matsumoto, MD, PhD, Akio Matsuda, PhD Journal of Allergy and Clinical Immunology Volume 138, Issue 5, Pages 1395-1403.e6 (November 2016) DOI: 10.1016/j.jaci.2016.01.032 Copyright © 2016 American Academy of Allergy, Asthma & Immunology Terms and Conditions

Fig 1 IL-33 protein expression in platelets and megakaryocytes. A, Western blotting analysis for IL-33. COS-7 cell lysates transiently transfected with full-length IL-33–expressing vector or empty vector (1 × 105 cells/each lane), human platelet extracts from 2 distinct donors (1 × 106 cells/each lane), and cytosol (1 × 105 cells/lane) and nuclear (4 × 105 cells/lane) fractions of MEG-01 cells were loaded, and Western blotting was performed with rabbit polyclonal antibodies for human IL-33, heat shock protein 90 (as a loading control for COS-7 cells and a cytosol fraction control for MEG-01 cells), and histone H3 (as a nuclear fraction control for MEG-01 cells). B, Expression of IL-33 protein in murine megakaryocytes. Murine megakaryocytes were isolated from bone marrow cells of C57BL/6N (wild-type [WT]) and IL-33–deficient (IL-33 −/−) mice. After fixation with cold methanol/acetone (1:1), cells were stained for platelet integrin CD41 (green) and IL-33 (red), and nuclei were stained with 4′-6-diamidino-2-phenylindole dihydrochloride (DAPI; blue). Journal of Allergy and Clinical Immunology 2016 138, 1395-1403.e6DOI: (10.1016/j.jaci.2016.01.032) Copyright © 2016 American Academy of Allergy, Asthma & Immunology Terms and Conditions

Fig 2 Platelet depletion resulted in a significant decrease in papain-induced eosinophilic inflammation in the murine airway. A, Study design and platelet numbers in blood during the experiment. IP, Intraperitoneal. B, Twenty-four hours after the last administration, BAL fluid was collected from each mouse, and total WBCs, eosinophils, macrophages, neutrophils, and lymphocytes in each fluid were counted. Data show means ± SDs (isotype antibody + saline, n = 10; isotype antibody + papain, n = 15; anti-CD41 antibody + saline, n = 11; and anti-CD41 antibody + papain, n = 17). *P < .05 and **P < .01. Journal of Allergy and Clinical Immunology 2016 138, 1395-1403.e6DOI: (10.1016/j.jaci.2016.01.032) Copyright © 2016 American Academy of Allergy, Asthma & Immunology Terms and Conditions

Fig 3 Effects of platelet depletion on the expression of cytokines/chemokines in the lung. mRNA was isolated from the lung at 24 hours after the last administration. Expression of IL-4, IL-5, IL-13, and IFN-γ was determined by using qPCR. Data show means ± SDs (isotype antibody + saline, n = 8; isotype antibody + papain, n = 6; anti-CD41 antibody + saline, n = 8; and anti-CD41 antibody + papain, n = 6). *P < .05. GAPDH, Glyceraldehyde-3-phosphate dehydrogenase. Journal of Allergy and Clinical Immunology 2016 138, 1395-1403.e6DOI: (10.1016/j.jaci.2016.01.032) Copyright © 2016 American Academy of Allergy, Asthma & Immunology Terms and Conditions

Fig 4 Effects of concomitant administration of platelets with papain on the airway inflammation. Platelets from wild-type or IL-33–deficient mice were intranasally administered immediately after each papain treatment once per day for 3 days. Twenty-four hours after the last administration, BAL fluid was collected from each mouse, and total WBCs, eosinophils, macrophages, neutrophils, and lymphocytes in each fluid were counted. Data show means ± SDs (saline, n = 10; saline + wild-type platelets, n = 5; saline + IL-33 [−/−] platelets, n = 5; saline + papain, n = 18; papain + wild-type platelets, n = 20; and papain + IL-33 [−/−] platelets, n = 15). *P < .05 and **P < .01. KO, Knockout. Journal of Allergy and Clinical Immunology 2016 138, 1395-1403.e6DOI: (10.1016/j.jaci.2016.01.032) Copyright © 2016 American Academy of Allergy, Asthma & Immunology Terms and Conditions

Fig E1 Papain-induced airway inflammation was attenuated by anti-CD41 treatment. Lungs were harvested 24 hours after the last administration of papain or saline and stained with hematoxylin and eosin. Journal of Allergy and Clinical Immunology 2016 138, 1395-1403.e6DOI: (10.1016/j.jaci.2016.01.032) Copyright © 2016 American Academy of Allergy, Asthma & Immunology Terms and Conditions

Fig E2 Effects of platelet depletion on expression of cytokines/chemokines in blood serum. Blood serum was collected from each mouse at 24 hours after the last administration of papain or saline. Concentrations of 43 kinds of cytokines/chemokines (listed in the Methods section in this article's Online Repository) in sera were measured by using the multiplex assay. Only 4 molecules (IL-5, TARC, MDC, and IL-27) of the 43 analytes were detected with statistical significance, whereas the other 39 molecules could not be detected at all. Despite being negative, the data for IL-1α/IL-1β, IFN-γ, IL-17, and IL-4/IL-13 are shown as representatives of proinflammatory, TH1, TH17, and TH2 cytokines, respectively, in addition to those for IL-5, TARC, MDC, and IL-27. Data show means ± SDs (isotype antibody + saline, n = 3; isotype antibody + papain, n = 5; anti-CD41 antibody + saline, n = 5; and anti-CD41 antibody + papain, n = 5). Differences between groups were analyzed by means of ANOVA with the Bonferroni post hoc test and considered significant at a P value of less than .05. *P < .05. Journal of Allergy and Clinical Immunology 2016 138, 1395-1403.e6DOI: (10.1016/j.jaci.2016.01.032) Copyright © 2016 American Academy of Allergy, Asthma & Immunology Terms and Conditions

Fig E3 In vitro “endothelium-platelet” coculture assay to evaluate IL-33 bioactivity. HMVEC-Ls were treated with thrombin, purified human platelets, and recombinant human ST2-Fc chimera protein, either alone or in combination for 6 hours, and mRNA levels for IL-8 were measured by using qPCR. Data from 2 different lots of HMVEC-Ls (Lots #1 and #2) from 2 individual donors were shown as means ± SDs of triplicate or quadruple samples. **P < .01. Journal of Allergy and Clinical Immunology 2016 138, 1395-1403.e6DOI: (10.1016/j.jaci.2016.01.032) Copyright © 2016 American Academy of Allergy, Asthma & Immunology Terms and Conditions

Fig E4 Flow cytometric analysis of macrophages. Twenty-four hours after the last administration of papain or saline, BAL fluid was collected from each mouse. A, CD45+ AMs (F4/80+CD11c+) and IMs (F4/80+CD11c−) in BAL fluid were determined by means of flow cytometry. Ab, Antibody. B, Total numbers of AMs and IMs per lung are shown. C, Percentages of the CD206+ M2 macrophage subset in IMs from each BAL fluid sample were determined by using anti-CD206. Data show means ± SDs (isotype antibody + saline, n = 5; isotype antibody + papain, n = 5; anti-CD41 antibody + saline, n = 5; and anti-CD41 antibody + papain, n = 5). *P < .05. Journal of Allergy and Clinical Immunology 2016 138, 1395-1403.e6DOI: (10.1016/j.jaci.2016.01.032) Copyright © 2016 American Academy of Allergy, Asthma & Immunology Terms and Conditions

Fig E5 Effects of adoptive transfer of human platelets in IL-33–deficient mice. The study design of platelet depletion and papain-induced airway inflammation in IL-33–deficient mice was the same as described in Fig 2, A. On both days 1 and 3, purified human platelets were intravenously administered (2.5 × 107 platelets/500 μL of sterile PBS). Twenty-four hours after the last administration of papain and human platelets, BAL fluid was collected from each mouse, and the numbers of total WBCs, eosinophils, macrophages, neutrophils, and lymphocytes in BAL fluid were counted. Data show means ± SDs (saline, n = 5; saline + human platelets, n = 4; papain, n = 5; and papain + human platelets, n = 7). *P < .05 and **P < .01. Journal of Allergy and Clinical Immunology 2016 138, 1395-1403.e6DOI: (10.1016/j.jaci.2016.01.032) Copyright © 2016 American Academy of Allergy, Asthma & Immunology Terms and Conditions