نتایج جستجو برای: فعالیت nk
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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...
ززمینه و هدف: سلولهای کشنده طبیعی (NK Cell) بخشی از ایمنی ذاتی بدن هستند که تعداد آن‌ها در مقابله با بسیاری از بیماری‌ها و در فرآیند تشخیص و تغییرات آن‌ها اهمیت زیادی دارد. ارتباط بین فاکتور‌های روانی، اجتماعی با وضعیت ایمنی فرد از مطالعاتی است که در حیطه سایکونوروایمونولوژی انجام می‌شود. مطالعه حاضر به بررسی تعداد سلولهای NK موجود در خون محیطی جانبازان شیمیایی تنفسی، و ارتباط آن با سلامت ر...
Introduction: Immunological processes are most important 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 investigate the percentage and absolute number of natural killer(NK) cells in women with RSA with unknown etiology. Methods: 24 Women with a history of recurrent ...
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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 ...
background: multiple sclerosis (ms) and neuromyelitis optica (nmo) are inflammatory and demyelinating diseases of the central nervous system (cns). nk cells are supposed to play an important role in the pathophysiology of ms, but their role in the nmo remains unknown. the aim of this study was to compare the prevalence of different subpopulations of nk cells in the patients with ms and nmo and ...
Background: Natural Killer cells express killer inhibitory receptors specific for HLA-class I molecules. These receptors could induce signals that determine NK cells ability to mediate cytotoxicity. Purified soluble form of HLA class I molecules (sHLA) could bind to NK cell receptors and down-regulate the NK killer function. Objective: To evaluate the influence of sHLA and two monoclonal an...
background: natural killer (nk) cells play an important role in early stages of innate immune responses against viral and tumoral attacks. activation of nk cells by leishmaniasis results in secretion of cytokines such as interferon (ifn)-γ and tumor necrosis factor (tnf)-α, which enhances the phagocytosis and clearance of parasite. lipophosphoglycan 3 (lpg3), the leishmania homologous with grp...
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 ...
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...
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