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Iranian Journal of Allergy, Asthma and Immunology، جلد ۱۳، شماره ۲، صفحات ۸۵-۹۲
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عنوان انگلیسی Alteration in frequency and function of CD4⁺CD25⁺FOXP3⁺ regulatory T cells in patients with immune thrombocytopenic purpura.
چکیده انگلیسی مقاله Immune thrombocytopenic purpura (ITP) is an autoimmune bleeding disorder characterized by production of auto-antibodies against platelet antigens. It is obvious that regulatory T cells (Tregs) have a major role in controlling immune homeostasis and preventing autoimmunity. To investigate the frequency and functions of Tregs, twenty ITP patients and twenty age- and sex- matched healthy controls were recruited. The peripheral blood mononuclear cells were isolated and the proportion of Tregs was defined by flow cytometry method. The expression of immune-regulatory markers, cytotoxic T-lymphocyte associated antigen-4 (CTLA-4) and glucocorticoid induced tumor necrosis factor receptor (GITR) were also assessed by quantitative Real-time polymerase chain reaction TaqMan method. For evaluation of Treg function, Tregs were enriched and their ability to inhibit proliferation of T cells was measured and levels of immune-regulatory cytokines IL-10 and Transforming growth factor beta (TGF-β) were also measured.Results showed that the frequency of Tregs and the mean fluorescence intensity of forkhead box P3 (FOXP3) protein significantly decreased in ITP patients compared to those in healthy controls. In addition, there was a significant reduction in relative expression of both CTLA-4 and GITR mRNA in ITP patients (p=0.02 and p=0.006, respectively). The suppressive function of Tregs also diminished in ITP patients compared to controls. Both IL-10 and TGF-β cytokines were produced in lower amounts in ITP patients than controls. It could be concluded that alteration in Treg frequency and functional characteristics might be responsible for loss of self-tolerance and subsequently destructive immune responses observed in ITP patients.
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نویسندگان مقاله نرگس arandi | nargess arandi
department of immunology, school of public health, tehran university of medical sciences, tehran, iran

سازمان اصلی تایید شده: دانشگاه علوم پزشکی تهران (Tehran university of medical sciences)

عباس | abbas mirshafiey
department of immunology, school of public health, tehran university of medical sciences, tehran, iran

سازمان اصلی تایید شده: دانشگاه علوم پزشکی تهران (Tehran university of medical sciences)

محمود جدی تهرانی | mahmood jeddi tehrani
monoclonal antibody research center, avicenna research institute, acecr, tehran, iran


محمدرضا شقاقی | mohammadreza shaghaghi
research center for immunodeficiency, pediatrics center of excellence, children’s medical center, tehran university of medical sciences, tehran, iran

سازمان اصلی تایید شده: دانشگاه علوم پزشکی تهران (Tehran university of medical sciences)

بامداد صادقی | bamdad sadeghi
research center for immunodeficiency, pediatrics center of excellence, children’s medical center, tehran university of medical sciences, tehran, iran

سازمان اصلی تایید شده: دانشگاه علوم پزشکی تهران (Tehran university of medical sciences)

حسن ابوالحسنی | hassan abolhassani
research center for immunodeficiency, pediatrics center of excellence, children’s medical center, tehran university of medical sciences, tehran, iran

سازمان اصلی تایید شده: دانشگاه علوم پزشکی تهران (Tehran university of medical sciences)

رمضان علی شریفیان | ramazan ali sharifian
clinic of hematology and oncology, vali-asr hospital, faculty of medicine, tehran university of medical sciences, tehran, iran

سازمان اصلی تایید شده: دانشگاه علوم پزشکی تهران (Tehran university of medical sciences)

محمد سعید رحیمی نژاد | mohammad saeid rahiminejad
division of pediatric hematology oncology, children amp;amp; 039;s medical center, tehran university of medical sciences, tehran, iran

سازمان اصلی تایید شده: دانشگاه علوم پزشکی تهران (Tehran university of medical sciences)

اصغر آقامحمدی | asghar aghamohammadi
research center for immunodeficiency, pediatrics center of excellence, children’s medical center, tehran university of medical sciences, tehran, iran

سازمان اصلی تایید شده: دانشگاه علوم پزشکی تهران (Tehran university of medical sciences)

نشانی اینترنتی http://ijaai.tums.ac.ir/index.php/ijaai/article/view/472
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