نتایج جستجو برای: b cll
تعداد نتایج: 902111 فیلتر نتایج به سال:
The malignant, CD5+ B lymphocytes of B cell chronic lymphocytic leukemia (B-CLL) die by apoptosis in vitro. This is in contrast to the prolonged life span of the leukemic cells in vivo and likely reflects the lack of essential growth factors in the tissue culture medium. We found that interferon gamma (IFN-gamma) inhibits programmed cell death and promotes survival of B-CLL cells in culture. Th...
Deletions and/or mutations of p53 are relatively rare and late events in the natural history of B-cell chronic lymphocytic leukemia (B-CLL). However, it is unknown whether p53 signaling is functional in B-CLL and if targeted nongenotoxic activation of the p53 pathway by using nutlin-3, a small molecule inhibitor of the p53/MDM2 interaction, is sufficient to kill B-CLL cells. In vitro treatment ...
We recently reported that chronic lymphocytic leukemia (CLL) cells synthesize and release vascular endothelial growth factor (VEGF) under normoxic and hypoxic conditions. CLL B cells also express VEGF membrane receptors (VEGF-R1 and VEGF-R2), suggesting that they use VEGF as a survival factor. To assess the mechanism of apoptosis resistance related to VEGF, we determined the impact of VEGF on C...
Monoclonal B-Cell Lymphocytosis (MBL) is part of the mature B-cell neoplasms despite actually being a pre-neoplastic condition [1], this entity, largely unstudied, affects more than 5-10% older adults age 40 and incidence increases with aging [2,3], MBL widely associated as one main risk factors for developing Chronic Lymphocytic Leukemia (CLL)/Small Cell Lymphoma (SLL), since studies Prospecti...
Recent studies have established that interleukin (IL)-10 induces growth and most notably differentiation of normal human B lymphocytes. We studied here the effects of IL-10 on the proliferation and survival of B-chronic lymphocytic leukemia (B-CLL) cells. IL-10 was found to inhibit 54-96% of the spontaneous tritiated thymidine incorporation observed in 3 of 12 B-CLL samples. Furthermore, IL-10 ...
B-cell chronic lymphocytic leukemia (B-CLL) is characterized by a resistance toward apoptosis-inducing agents. Nuclear factor-kappaB (NF-kappaB)/Rel has been shown to regulate the expression of antiapoptotic genes, such as members of the inhibitor of apoptosis protein (IAP) and tumor necrosis factor receptor-associated factor (TRAF) gene families. Expression and regulation of NF-kappaB/Rel-depe...
زمینه و هدف: لوسمی لنفوسیتی مزمن سلول B (B-CLL) یک بیماری بدخیم لنفوسیت های B است که همراه با تغییرات متعددی در لنفوسیت های T غیر بدخیم می باشد. با توجه به اینکه آنتی ژن های ویروسی می توانند تغییرات قابل توجهی در لنفوسیت های T ایجاد نمایند و سیتومگالوویروس (CMV) در افراد پیر سالم باعث تغییرات گوناگون در لنفوسیت های T بوده است، لذا این مطالعه با هدف بررسی ارتباط بین تغییرات این سلول ها و CMV در ...
In mice, generation of autoreactive CD5+ B cells occurs as a consequence of BCR signaling induced by (self)-ligand exposure from fetal/neonatal B-1 B cell development. A fraction of these cells self-renew and persist as a minor B1 B cell subset throughout life. Here, we show that transfer of early generated B1 B cells from Eμ-TCL1 transgenic mice resulted in chronic lymphocytic leukemia (CLL) w...
B-cell chronic lymphocytic leukemia (B-CLL) patients expressing unmutated immunoglobulin heavy variable regions (IGHVs) use the IGHV1-69 B cell receptor (BCR) in 25% of cases. Since HIV-1 envelope gp41 antibodies also frequently use IGHV1-69 gene segments, we hypothesized that IGHV1-69 B-CLL precursors may contribute to the gp41 B cell response during HIV-1 infection. To test this hypothesis, w...
B-chronic lymphocytic leukemia (CLL) patients frequently suffer from moderate to severe hypogammaglobulinemia. This complication is a serious cause of morbidity and mortality in this disorder. There is recent evidence that natural killer (NK) cells modulate B-cell immunoglobin (Ig) synthesis/secretion. The authors therefore evaluated the circulating NK cells from B-CLL patients on their ability...
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