Search results for "Myeloid"

UPREGULATION OF MIR-29A AND GENOMIC DNA HYPERMETHYLATION IN NORMAL KARYOTYPE AML SHOWING DNMT3A MUTATION UPREGOLAZIONE DEL MIR-29A E IPERMETILAZIONE …

2015

DNMT3A, a member of DNA methyltransferases, is mutated in approximately 22% of de novo normal karyotype acute myeloid leukemia (NK-AML) patients leading to adverse overall survival. The highly recurrent mutation in DNMT3A is a “gain of function-like” at codon R882. To indagate about miRNA signature in NK-AML R882-DNMT3A mutated we studied by qRT-PCR the expression of 384 known human miRNA in 9 selected de-novo AML DNMT3A mutated. We compared miRNA expression data with our previous results obtained in 31 AML DNMT3A wild type (WT) and we focused on a strong up-regulation of miR155, miR29a, miR196b and miR25. We consolidated this data in additional 24 new DNMT3A mutated AML and we confirmed th…

Upregulation of miR-29a and genomic DNA hypermethylation in normal karyotype AML showing DNMT3A mutation

2015

Acute Myeloid Leukaemia (AML) is frequently associated to normal karyotype and DNMT3A mutations (R882). Since we previously demonstrated distinctive miRNA expression in some AML groups, we study 384 miRNA in 9 selected DNMT3A-mutated NK-AML patients. Comparing these data with our previous results obtained in 31 DNMT3A-unmutated AML, we focused on a significant up-regulation of miR-155, miR-29a, miR-196b and miR-25. We investigated expression of these miRNAs in additional 24 DNMT3A-mutated AML patients and we confirm the up-regulation of miR-155, miR-29a and miR-196b; in particular, we judged very interesting the over expression of miR-29a since is known to directly target DNMT3A, TET1 and T…

Myeloid zinc finger 1 regulates thymidylate synthase expression in patients with metastatic colorectal cancer showing the same promoter gene polymorp…

2011

Genetic variation in human leukocyte antigen and susceptibility to acute myeloid leukemia.

2015

In this issue of Acta Haematologica, Authors report the association between the Human Major Histocompatibility complex (MHC) HLA-C3 and Acute Myeloid Leukemia (AML) in Korean population, confirming previous studies on association between HLA-C and AML.

Chronic myelogenous leukaemia- derived exosomes mediate autocrine and paracrine interplays within the tumour microenvironment: a role for IL8

2014

La Leucemia Mieloide Cronica (LMC) è una neoplasia ematologica causata dalla traslocazione reciproca t(9:22) con conseguente formazione dell'oncoproteina BCR-ABL con attività tirosin-chinasica costitutiva. L’Imatinib mesilato (IM) è un inibitore selettivo dell’oncoproteina che ha migliorato significativamente la prognosi dei pazienti affetti da LMC. Nonostante il successo terapeutico, un grave problema connesso con la somministrazione di imatinib è lo sviluppo di resistenza farmacologica. E’ quindi necessario lo sviluppo di nuovi agenti antineoplastici che abbiano come target non soltanto le cellule tumorali ma anche il microambiente che le circonda. Recentemente, infatti, l’attenzione dei …

Increased frequencies of CD11b+CD33+CD14+HLA-DRlowmyeloid-derived suppressor cells are an early event in melanoma patients

2014

Myeloid-derived suppressor cells (MDSC) are a heterogeneous cell population characterized by immunosuppressive activity. Elevated levels of MDSC in peripheral blood are found in inflammatory diseases as well as in malignant tumors where they are supposed to be major contributors to mechanisms of tumor-associated tolerance. We investigated the frequency and function of MDSC in peripheral blood of melanoma patients and observed an accumulation of CD11b(+) CD33(+) CD14(+) HLA-DR(low) MDSC in all stages of disease (I-IV), including early stage I patients. Disease progression and enhanced tumor burden did not result in a further increase in frequencies or change in phenotype of MDSC. By investig…

TRAIL-induced apoptosis of hepatocellular carcinoma cells is augmented by targeted therapies

2009

AIM: To analyze the effect of chemotherapeutic drugs and specific kinase inhibitors, in combination with the death receptor ligand tumor necrosis factor-related apoptosis inducing ligand (TRAIL), on overcoming TRAIL resistance in hepatocellular carcinoma (HCC) and to study the efficacy of agonistic TRAIL antibodies, as well as the commitment of antiapoptotic BCL-2 proteins, in TRAIL-induced apoptosis. METHODS: Surface expression of TRAIL receptors (TRAIL-R1-4) and expression levels of the antiapoptotic BCL-2 proteins MCL-1 and BCL-xL were analyzed by flow cytometry and Western blotting, respectively. Knock-down of MCL-1 and BCL-xL was performed by transfecting specific small interfering RNA…

Sorafenib maintenance after allogeneic hematopoietic stem cell transplantation for acute myeloid leukemia with FLT3-internal tandem duplication mutat…

2020

PURPOSE Despite undergoing allogeneic hematopoietic stem cell transplantation (HCT), patients with acute myeloid leukemia (AML) with internal tandem duplication mutation in the FMS-like tyrosine kinase 3 gene ( FLT3-ITD) have a poor prognosis, frequently relapse, and die as a result of AML. It is currently unknown whether a maintenance therapy using FLT3 inhibitors, such as the multitargeted tyrosine kinase inhibitor sorafenib, improves outcome after HCT. PATIENTS AND METHODS In a randomized, placebo-controlled, double-blind phase II trial (SORMAIN; German Clinical Trials Register: DRKS00000591), 83 adult patients with FLT3-ITD–positive AML in complete hematologic remission after HCT were r…

In vitro differentiation of murine hematopoietic progenitor cells toward the myeloid lineage occurs in response to Staphylococcus aureus and yeast sp…

2013

We have studied the effect of inactivated microbial stimuli (Candida albicans, Candida glabrata, Saccharomyces boulardii, and Staphylococcus aureus) on the in vitro differentiation of lineage negative (Lin−) hematopoietic progenitor mouse cells. Purified Lin− progenitors were co-cultured for 7 days with the stimuli, and cell differentiation was determined by flow cytometry analysis. All the stimuli assayed caused differentiation toward the myeloid lineage. S. boulardii and particularly C. glabrata were the stimuli that induced in a minor extent differentiation of Lin− cells, as the major population of differentiated cells corresponded to monocytes, whereas C. albicans and S. aureus induced …

Stochastic dynamics of leukemic cells under an intermittent targeted therapy

2009

The evolutionary dynamics of cancerous cell populations in a model of Chronic Myeloid Leukemia (CML) is investigated in the presence of an intermittent targeted therapy. Cancer development and progression is modeled by simulating the stochastic evolution of initially healthy cells which can experience genetic mutations and modify their reproductive behavior, becoming leukemic clones. Front line therapy for the treatment of patients affected by CML is based on the administration of tyrosine kinase inhibitors, namely imatinib (Gleevec) or, more recently, dasatinib or nilotinib. Despite the fact that they represent the first example of a successful molecular targeted therapy, the development o…