نتایج جستجو برای: flt3 itd
تعداد نتایج: 4119 فیلتر نتایج به سال:
Constitutively activating internal tandem duplication (ITD) mutations of the receptor tyrosine kinase FLT3 (Fms-like tyrosine kinase 3) play an important role in leukemogenesis, and their presence is associated with poor prognosis in acute myeloid leukemia (AML). To better understand FLT3 signaling in leukemogenesis, we have examined the changes in gene expression induced by FLT3/ITD or constit...
BACKGROUND Internal tandem duplication (ITD) mutations in the juxtamembrane domain-coding sequence of the Fms-like tyrosine kinase 3 (FLT3) gene have been identified in 30% of acute myeloid leukemia (AML) patients and are associated with a poor prognosis. The kinase inhibitor sorafenib induces growth arrest and apoptosis at much lower concentrations in AML cell lines that harbor FLT3-ITD mutati...
P27 Kip1 (p27) can prevent cell proliferation by inactivating cyclin-dependent kinases. This function is impaired upon phosphorylation of p27 at tyrosine residue 88. We observed that FLT3 and FLT3-ITD can directly bind and selectively phosphorylate p27 on this residue. Inhibition of FLT3-ITD in cell lines strongly reduced p27 tyrosine 88 phosphorylation and resulted in increased p27 levels and ...
سابقه و هدف: جهش ژن flt3 (گیرنده تیروزین کینازی شبه) fms باعث تکثیر بدون کنترل سلول های لوسمیک شده و پیش آگهی بدی را به همراه دارد. هدف ما از این مطالعه اجرایی کردن آزمایشات مولکولی برای تشخیص و غربالگری این جهش ها در مبتلایان لوسمی های حاد بود.روش بررسی: در این مطالعه بنیادی، 91 کودک مبتلا به لوسمی های حاد میلوئیدی (aml) و لنفوئیدی (all) از نظر جهش در ژن flt3 شامل وجود جهش itd (internal tandem...
BACKGROUND Acute promyelocytic leukemia is a cytogenetically well defined entity. Nevertheless, some features observed at diagnosis are related to a worse outcome of the patients. METHODS In a prospective study, we analyzed peripheral (PB) leukocyte count, immunophenotype, methylation status of CDKN2B, CDKN2A and TP73; FLT3 and NPM1 mutations besides nuclear chromatin texture characteristics ...
Constitutive activation of the receptor tyrosine kinase Fms-like tyrosine kinase 3 (FLT3), via co-expression of its ligand or by genetic mutation, is common in acute myeloid leukemia (AML). In this study we show that FLT3 activation inhibits the activity of the tumor suppressor, protein phosphatase 2A (PP2A). Using BaF3 cells transduced with wildtype or mutant FLT3, we show that FLT3-induced PP...
Binding of leukemia cells to the bone marrow extracellular matrix (ECM) through integrins might influence drug response and the survival of acute myeloid leukemia (AML). However, the functions of integrin in AML are needed to be clarified. Data from The Cancer Genome Atlas (TCGA) were retrieved and integrin β3 (ITGB3) expression and prognostic significance for AML were analyzed. Integrin alphav...
Salvage chemotherapy for relapsed/refractory FLT3-ITD-mutant acute myeloid leukemia (AML) is associated with a low complete remission (CR) rate (20–26%), despite the sequential use of a FLT3 inhibitor. FLT3 ligand rises precipitously after chemotherapy administration in advanced AML and is thought to have a detrimental effect on the activity of FLT3 inhibitors. Most studies involving FLT3 inhib...
Mutations of the nucleophosmin (NPM1) gene have recently been described in patients with acute myeloid leukemia (AML). To clarify the prevalence as well as the clinical impact of this mutation, we investigated 1485 patients with AML for NPM1 exon 12 mutations using fragment analysis. A 4 bp insert was detected in 408 of 1485 patients (27.5%). Sequence analysis revealed known mutations (type A, ...
introduction: about half of acute myeloid leukemia (aml) adult patients have no cytogenetic abnormalities as a main determinant of complete remission after treatment, so other markers are needed such as flt3-itd (fms-like tyrosine kinase3-internal tandem duplication) mutations in patients with normal karyotype. the objective of this study was assessing the frequency of flt3-itd mutations and it...
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