نتایج جستجو برای: hla g downregulation
تعداد نتایج: 503600 فیلتر نتایج به سال:
Abstract T-cell receptor mimic antibodies (TCRm) have become an attractive therapeutic modality group as they allow for the targeting of intracellular proteins presented by HLA, which may a large potential new targets. However, polymorphic nature classical HLA class I and findings downregulation in cancer cells might limit use these agents treatment. An alternative approach would be to target p...
The non-classical human leukocyte antigen G (HLA-G) is expressed at a high frequency in renal cell carcinoma (RCC) and is associated with a higher tumor grade and a poor clinical outcome. This might be caused by the HLA-G-mediated inhibition of the cytotoxicity of T and NK cells. Therefore a selective targeting of HLA-G might represent a powerful strategy to enhance the immunogenicity of RCC le...
Nonclassical HLAs, HLA-E and HLA-G, are known to affect clinical outcome in various tumor types. We examined the clinical impact of HLA-E and HLA-G expression in early breast cancer patients, and related the results to tumor expression of classical HLA class I. Our study population (n = 677) consisted of all early breast cancer patients primarily treated with surgery in our center between 1985 ...
BACKGROUND Tumors avoid destruction by cytotoxic T cells (CTL) and natural killer (NK) cells by downregulation of classical human leukocyte antigens (HLA) and overexpression of non-classical HLA. This is the first study to investigate HLA expression in relation to histology (squamous cell carcinoma (SCC) vs. adenocarcinoma (AC)), clinicopathological parameters and survival in a large cervical c...
Inhibition of B cells constitutes a rational approach for treating B cell-mediated disorders. We demonstrate in this article that the engagement of the surface Ig-like transcript 2 (ILT2) inhibitory receptor with its preferential ligand HLA-G is critical to inhibit B cell functions. Indeed, ILT2-HLA-G interaction impedes both naive and memory B cell functions in vitro and in vivo. Particularly,...
بررسی رونوشتهای hla-g در سلولهای تک هسته ای خون محیطی افراد سالم و دچار لوپوس و اثر ifn-γ بر بیان آن
hla-g یک آنتی ژن کمپلکس بافتی غیر کلاسیک میباشد و 7 ایزوفرم مختلف شامل 4 نوع متصل به غشاء (g1,g2,g3,g4)و 3 نوع به عنوان پروتئینهای محلول (g5,g6,g7)دارد.الگوی بیان انتخابی رونوشتهای hla-g در بافتها نمایانگر وجود کنترل رونویسی محکم بیان ژنی می باشد.سایتوکاینهایی مانند اینترفرونها و il10 سبب تحریک بیان این آنتی ژنها می شوند. هدف این مطالعه بررسی اثر ifn-γ بر بیان رونوشتهای hla-g در سلولهای تک هسته...
مالتیپل اسکلروزیس (ms)یک بیماری التهابی سیستم اعصاب مرکزی است که از تعامل پیچیده فاکتورهای ژنتیکی و عوامل محیطی منشاء می گیرد. براساس مطالعات گسترده ژنومی (gwas) چندین پلی مورفیسم تک نوکلئوتیدی (snp) در ژن های مسئول عملکرد ایمنی به عنوان عوامل مستعد کننده بیماری شناخته شده اند. از طرف دیگربا توجه به اهمیت shla-g به عنوان یکی از فاکتورهای تعدیل کننده ایمنی و نقش حیاتی سلول های t تنظیمی در بیماری...
Human leukocyte Ag-G, a tolerogenic molecule that acts on cells of both innate and adaptive immunity, plays an important role in tumor progression, transplantation, placentation, as well as the protection of the allogeneic fetus from the maternal immune system. We investigated HLA-G mRNA and protein expression in human embryonic stem cells (hESC) derived from the inner cell mass (ICM) of blasto...
Coevolution of herpesviruses and their hosts has driven the development of both host antiviral mechanisms to detect and eliminate infected cells and viral ploys to escape immune surveillance. Among the immune-evasion strategies used by the lymphocryptovirus (γ(1)-herpesvirus) EBV is the downregulation of surface HLA class I expression by the virally encoded G protein-coupled receptor BILF1, the...
Background and Aims: Human leukocyte antigen (HLA) molecules play a substantial role in T Lymphocyte-mediated adaptive immune response. Down-regulation of HLA expression may help the tumor to escape from immune surveillance. This study aimed to evaluate the correlation between HLA-G and HLA-E tissue distribution and the degree of tumor malignancy in human breast tumors. Materials and Methods:...
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