نتایج جستجو برای: سلول های کشنده طبیعی nk cell
تعداد نتایج: 2185123 فیلتر نتایج به سال:
کارآیی بهتر رادیوتراپی نیاز به اختصاصی بودن پرتو تابشی و حساسیت بالای سلول های هدف دارد. برای این منظور تابش ذرات آلفا به سلول های سرطان پوست (Melanoma) مورد بررسی قرار گرفت. مونوکلونال آنتی بادی 9.2.27 مخصوص سرطان پوست توسط یک منبع رادیوایزوتوپ آلفا دهنده ²¹³Bi (بیسموت) و یک منبع رادیو ایزوتوپ پوزیترون دهنده 152Tb (تربیوم) نشاندار شده است. دو عامل واسط (Cycelic anhydride diethylene triamine pe...
background: hla-g is a nonclassical hla class i molecule which, when elevated in tumor cells, is one of the main factors involved in tumor evasion of immune responses including nk and t cells. objective: to evaluate the effect of hla-g downregulation on nk cell cytotoxicity in tumor cell lines. methods: the expression level of hla-g was measured by real-time pcr and flowcytometry after transfec...
Introduction: Functional defect in immune cells is the prominent feature in hematological malignancies that lead to the expansion of tumor cells. Using immunostimulatory cytokines is one of the new therapeutic approaches. This study aimed to investigate the effect of IL-27 on the activity of bone marrow-NK cells of chronic lymphocytic leukemia (CLL) patients in vitro. Materials and Methods: 10 ...
ABSTRACT Natural Killer cells (NKs), are considered an important first line of defence and were originally defined by their ability to kill certain tumor cells and virally infected cells. Our aim is to study expression of HLA class-Ia on tumor cell lines and their susceptibility of NK cells. In this study MDA-MB-468 tumor cell line (NCB1, C208) That derived from human breast adenocarcino...
background: schizophrenia has been associated with altered immunity. different studies regarding natural killer cell activity (nka) in schizophrenic patients have shown inconsistent results. objectives: to evaluate nk cell activity in schizophrenic patients in comparison with healthy control individuals. methods: 30 medication-free schizophrenic patients and 41 healthy sex, age and smoking st...
زمینه و هدف: استرس ناشی از شغل پرمسوولیت مدیریت، در طولانی مدت بر سیستم ایمنی بدن تاثیر نا مطلوب به جا می گذارد. حمایت اجتماعی به عنوان یکی از عوامل تعدیل کننده اثرات منفی استرس مانند حمایت اجتماعی و رابطه آن با وضعیت ایمنی بدن، این مطالعه انجام شد.روش بررسی: این پژوهش تحلیلی به صورت پس رویدادی با استفاده از روش نمونه گیری خوشه ای، روی 360 نفر مدیر زن و مرد شاغل در دبیرستان های استان خوزستان در...
Natural killer (NK) cells are a subset of lymphocytes which play a crucial role in early innate immune response against infection and tumor transformation. Furthermore, they secrete interferon-γ (IFN-γ) and tumor necrosis factor (TNF) prompting adaptive immu-nity. NK cells distinguish the unhealthy cells from the healthy ones through an array of cell-surface receptors. Human NK cells use inhibi...
Introduction: Immunological processes play an important role in recurrent spontaneous abortion(RSA). According to studies, T lymphocytes and natural killer cells(NK cells) are two effective cell groups in RSA. The aim of this study was to study the percentage and absolute number of natural killer(NK) cells in women with RSA of unknown etiology. Methods: A total of 24 women with history of recu...
peripheral t-cell lymphomas are a group of heterogeneous disorders and according to who classification, are categorized into nodal and extranodal forms. nk/t-cell lymphoma, nasal type, is a subtype of extranodal peripheral t-cell lymphoma and commonly presents as a midfacial destructive lesion. this disorder is more prevalent in asia and south america and has a strong association with epstein b...
Introduction: Recurrent spontaneous abortion (RSA) is defined as three or more consecutive miscarriages, which affects 0.8 to 1% of pregnant women. Despite several well-established etiologic factors, the cause of RSA cannot be determined in almost 60% of the cases. It has been postulated that a part of these repeated pregnancy losses might be due to immune causes. Material and Methods: In the ...
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