کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10940861 | 1095526 | 2015 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Regulation of IgE production and airway reactivity by CD4âCD8â regulatory T cells
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کلمات کلیدی
AHRCTLA-4Cytotoxic T lymphocyte-associated antigen 4GITRs.c.BALOVAKLHLPSAlum - آلومAllergy - آلِرژیOvalbumin - اوبلبومینAirway hyperreactivity - بیش فعالی در هواپیماAntigen dose - دوز آنتیژنsubcutaneous - زیر جلدیbronchoalveolar lavage - لارو برونکلو آلوئولارlipopolysaccharide - لیپوپلی ساکاریدMouse model - مدل موشAluminium hydroxide - هیدروکسید آلومینیومkeyhole limpet hemocyanin - کلم هول limpet هموسیانین
موضوعات مرتبط
علوم زیستی و بیوفناوری
بیوشیمی، ژنتیک و زیست شناسی مولکولی
بیولوژی سلول
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The mechanisms of tolerance induction occurring in the course of allergen-specific immunotherapy have not been elucidated in full detail. Our study aimed to characterize high zone tolerance in mouse models of type I allergy and of allergic airway inflammation induced by subcutaneous sensitization of mice with high doses of the model allergen ovalbumin (OVA) without the use of adjuvant. Mice were immunized by subcutaneous injection of high doses (HD) of OVA or, for comparison, low doses (LD) of OVA in saline. HD-mice showed lower specific IgE, but augmented IgG in sera than LD-mice. Pre-treatment of mice with HD-OVA antigen-specifically inhibited IgE production subsequently induced by LD-OVA. OVA-restimulated splenocytes from HD-mice revealed hypoproliferation and impaired production of Th2-associated cytokines. HD-mice exhibited lower airway reactivity, goblet cell hyperplasia and mucus production, as well as IL-5 and IL-13 production in the lungs than LD-mice following local provocation. Recruitment of inflammatory cells into the airways was comparable, while the number of eosinophils in the bronchoalveolar lavage was substantially higher in HD-mice. Adoptive transfer of dnTC from HD-mice into naïve mice, which were subsequently sensitized with LD-OVA, suppressed IgE production in the recipients. The number of dnTC was higher in the spleens of HD-mice than LD-mice. In conclusion, our study demonstrates that subcutaneous sensitization of mice with high doses of allergen in the absence of adjuvant results in attenuated airway reactivity as compared with LD-sensitization and induces CD4âCD8â dnTC with regulatory function on IgE production.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Immunobiology - Volume 220, Issue 4, April 2015, Pages 490-499
Journal: Immunobiology - Volume 220, Issue 4, April 2015, Pages 490-499
نویسندگان
Verena Raker, Judith Stein, Evelyn Montermann, Joachim Maxeiner, Christian Taube, Angelika B. Reske-Kunz, Stephan Sudowe,