Search results for "Nucleophosmin"

showing 10 items of 15 documents

Persistent immune stimulation exacerbates genetically driven myeloproliferative disorders via stromal remodeling

2017

Abstract Systemic immune stimulation has been associated with increased risk of myeloid malignancies, but the pathogenic link is unknown. We demonstrate in animal models that experimental systemic immune activation alters the bone marrow stromal microenvironment, disarranging extracellular matrix (ECM) microarchitecture, with downregulation of secreted protein acidic and rich in cysteine (SPARC) and collagen-I and induction of complement activation. These changes were accompanied by a decrease in Treg frequency and by an increase in activated effector T cells. Under these conditions, hematopoietic precursors harboring nucleophosmin-1 (NPM1) mutation generated myeloid cells unfit for normal …

0301 basic medicineCancer ResearchStromal cellMyeloidMice TransgenicVascular RemodelingBiologyInbred C57BLTransgenicMice03 medical and health sciencesMyelogenousMyeloproliferative DisordersmedicineAnimalsHumansMyeloproliferative DisorderAnimals; Cell Proliferation; Humans; Mice; Mice Inbred C57BL; Mice Inbred CBA; Mice Transgenic; Myeloproliferative Disorders; Stromal Cells; Vascular Remodeling; Oncology; Cancer ResearchCell ProliferationMyeloproliferative DisordersAnimalStromal CellInbred CBANeutrophil extracellular trapsmedicine.diseaseMice Inbred C57BLHaematopoiesisLeukemia030104 developmental biologymedicine.anatomical_structureOncologyImmunologyMice Inbred CBABone marrowStromal CellsNucleophosminHuman
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Acute depletion of telomerase components DKC1 and NOP10 induces oxidative stress and disrupts ribosomal biogenesis via NPM1 and activation of the P53…

2020

Mutations in DKC1, NOP10, and TINF2 genes, coding for proteins in telomerase and shelterin complexes, are responsible for diverse diseases known as telomeropathies and ribosomopathies, including dyskeratosis congenita (DC, ORPHA 1775). These genes contribute to the DC phenotype through mechanisms that are not completely understood. We previously demonstrated in models of DC that oxidative stress is an early and independent event that occurs prior to telomere shortening. To clarify the mechanisms that induce oxidative stress, we silenced genes DKC1, NOP10, and TINF2 with siRNA technology. With RNA array hybridisation, we found several altered pathways for each siRNA model. Afterwards, we ide…

0301 basic medicineTelomeraseTelomere-Binding ProteinsCell Cycle ProteinsShelterin ComplexCell LineAdherens junction03 medical and health sciences0302 clinical medicineRibonucleoproteins Small NucleolarmedicineRNA Small InterferingMolecular BiologyTelomeraseTelomere ShorteningRibonucleoproteinChemistryRNANuclear ProteinsCell BiologyTelomereShelterinmedicine.diseaseCell biologyTelomereOxidative Stress030104 developmental biology030220 oncology & carcinogenesisMutationTumor Suppressor Protein p53NucleophosminRibosomesDyskeratosis congenitaBiogenesisBiochimica et biophysica acta. Molecular cell research
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All-trans retinoic acid as adjunct to intensive treatment in younger adult patients with acute myeloid leukemia: results of the randomized AMLSG 07-0…

2016

The aim of this clinical trial was to evaluate the impact of all-trans retinoic acid (ATRA) in combination with chemotherapy and to assess the NPM1 status as biomarker for ATRA therapy in younger adult patients (18–60 years) with acute myeloid leukemia (AML). Patients were randomized for intensive chemotherapy with or without open-label ATRA (45 mg/m2, days 6–8; 15 mg/m2, days 9–21). Two cycles of induction therapy were followed by risk-adapted consolidation with high-dose cytarabine or allogeneic hematopoietic cell transplantation. Due to the open label character of the study, analysis was performed on an intention-to-treat (ITT) and a per-protocol (PP) basis. One thousand one hundred pati…

AdultMale0301 basic medicineAcute promyelocytic leukemiaOncologymedicine.medical_specialtyNPM1Adolescentmedicine.medical_treatmentTretinoinYoung Adult03 medical and health sciences0302 clinical medicineInternal medicineAntineoplastic Combined Chemotherapy ProtocolsmedicineHumansddc:610ChemotherapyAcute myeloid leukemiaHematologyAll-trans retinoic acidbusiness.industryMyeloid leukemiaInduction ChemotherapyHematologyGeneral MedicineMiddle Agedmedicine.disease3. Good healthSurgerySurvival RateTransplantationClinical trialLeukemia Myeloid AcuteTreatment Outcome030104 developmental biologyNucleophosmin-1Acute myeloid leukemia; All-trans retinoic acid; Nucleophosmin-1030220 oncology & carcinogenesisCytarabineFemaleOriginal ArticlebusinessNucleophosminFollow-Up Studiesmedicine.drug
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Differential expression of specific microRNA and their targets in acute myeloid leukemia

2010

Acute myeloid leukemia (AML) the most common acute leukemia in adults is characterized by various cytogenetic and molecular abnormalities. However, the genetic etiology of the disease is not yet fully understood. MicroRNAs (miRNA) are small noncoding RNAs which regulate the expression of target mRNAs both at transcriptional and translational level. In recent years, miRNAs have been identified as a novel mechanism in gene regulation, which show variable expression during myeloid differentiation. We studied miRNA expression of leukemic blasts of 29 cases of newly diagnosed and genetically defined AML using quantitative reverse transcription polymerase chain reaction (RT-PCR) for 365 human miR…

AdultMaleNPM1Down-RegulationBiologySettore MED/15 - Malattie Del SangueYoung Adulthemic and lymphatic diseasesmicroRNAmedicineGene silencingHumansLeukemia microarray data microRNAGranulocyte Precursor CellsAgedCell ProliferationGeneticsRegulation of gene expressionAged 80 and overAcute leukemiaReverse Transcriptase Polymerase Chain ReactionGene Expression ProfilingCore Binding FactorsMyeloid leukemiaNuclear ProteinsCell DifferentiationHematologyMiddle Agedmedicine.diseaseUp-RegulationGene expression profilingGene Expression Regulation NeoplasticLeukemiaLeukemia Myeloid AcuteMicroRNAsfms-Like Tyrosine Kinase 3Case-Control StudiesMutationFemaleSettore SECS-S/01 - StatisticaNucleophosmin
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Clonal evolution in relapsed NPM1-mutated acute myeloid leukemia.

2013

Mutations in the nucleophosmin 1 (NPM1) gene are considered a founder event in the pathogenesis of acute myeloid leukemia (AML). To address the role of clonal evolution in relapsed NPM1-mutated (NPM1mut) AML, we applied high-resolution, genome-wide, single-nucleotide polymorphism array profiling to detect copy number alterations (CNAs) and uniparental disomies (UPDs) and performed comprehensive gene mutation screening in 53 paired bone marrow/peripheral blood samples obtained at diagnosis and relapse. At diagnosis, 15 aberrations (CNAs, n = 10; UPDs, n = 5) were identified in 13 patients (25%), whereas at relapse, 56 genomic alterations (CNAs, n = 46; UPDs, n = 10) were detected in 29 patie…

AdultMaleNPM1MyeloidImmunologyBiologyGene mutationBiochemistrySomatic evolution in cancerPolymorphism Single NucleotideDNA Methyltransferase 3AClonal EvolutionYoung AdultRecurrenceRisk FactorsmedicineHumansDNA (Cytosine-5-)-MethyltransferasesAgedChromosomes Human Pair 13Myeloid leukemiaNuclear ProteinsCell BiologyHematologyMiddle Agedmedicine.diseasePrognosisMinimal residual diseaseDNA FingerprintingLeukemiaETV6Leukemia Myeloid Acutemedicine.anatomical_structureCancer researchFemaleChromosomes Human Pair 9NucleophosminGene DeletionBlood
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Therapy-related acute myeloid leukemia developing 14 years after allogeneic hematopoietic stem cell transplantation, from a persistent R882H- DNMT3A …

2018

Abstract Background Therapy-related acute myeloid leukemia (t-AML) develops in patients with prior exposure to cytotoxic therapies. Selection of a pre-existing TP53 mutated clone prone to acquire additional mutational events has been suggested as the main pathogenic mechanism of t-AML. Here, we report a unique case of t-AML which developed from a pre-existing DNMT3A mutated clone that persisted in the patient for more than 10 years despite treatment with intensive chemotherapy and allogeneic hematopoietic stem cell transplantation (alloHSCT). Case presentation A 42-year-old male was diagnosed with AML harboring a normal karyotype and mutations in the NPM1 (c.863_864ins, p.W288 fs*12), DNMT3…

AdultMaleOncologymedicine.medical_specialtyNPM1Allogeneic transplantationmedicine.medical_treatmentClinical BiochemistryMutation MissenseClone (cell biology)Therapy-Related Acute Myeloid LeukemiaHematopoietic stem cell transplantationDNA Methyltransferase 3APathology and Forensic Medicine03 medical and health sciences0302 clinical medicineInternal medicinemedicineHumansTransplantation HomologousDNA (Cytosine-5-)-MethyltransferasesMolecular BiologyBone Marrow Transplantationbusiness.industryMyeloid leukemiaInduction chemotherapyTransplantationLeukemia Myeloid Acute030220 oncology & carcinogenesisbusinessNucleophosmin030215 immunologyExperimental and Molecular Pathology
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RPGR ORF15 isoform co-localizes with RPGRIP1 at centrioles and basal bodies and interacts with nucleophosmin

2005

The ORF15 isoform of RPGR (RPGR(ORF15)) and RPGR interacting protein 1 (RPGRIP1) are mutated in a variety of retinal dystrophies but their functions are poorly understood. Here, we show that in cultured mammalian cells both RPGR(ORF15) and RPGRIP1 localize to centrioles. These localizations are resistant to the microtubule destabilizing drug nocodazole and persist throughout the cell cycle. RPGR and RPGRIP1 also co-localize at basal bodies in cells with primary cilia. The C-terminal (C2) domain of RPGR(ORF15) (ORF15(C2)) is highly conserved across 13 mammalian species, suggesting that it is a functionally important domain. Using matrix-assisted laser desorption ionization time-of-flight mas…

CentrioleFluorescent Antibody TechniqueMicechemistry.chemical_compoundChlorocebus aethiopsGuanine Nucleotide Exchange FactorsProtein IsoformsBasal bodyConserved SequenceGenetics (clinical)CentriolesGlutathione Transferaseintegumentary systemNuclear ProteinsExonsGeneral MedicineRetinitis pigmentosa GTPase regulatorImmunohistochemistryNocodazoleCOS CellsNucleophosminCell NucleolusRecombinant Fusion ProteinsMolecular Sequence DataBiologyOpen Reading FramesMicrotubuleTwo-Hybrid System TechniquesGeneticsAnimalsHumansAmino Acid SequenceEye ProteinsMolecular BiologyNucleophosminSequence Homology Amino AcidProteinsPrecipitin TestsMolecular biologyeye diseasesProtein Structure TertiaryMice Inbred C57BLCytoskeletal ProteinschemistryCentrosomeCytoplasmSpectrometry Mass Matrix-Assisted Laser Desorption-IonizationMutationCattleHeLa CellsHuman Molecular Genetics
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Fine-tuning nucleophosmin in macrophage differentiation and activation

2011

Abstract M-CSF–driven differentiation of peripheral blood monocytes is one of the sources of tissue macrophages. In humans and mice, the differentiation process involves the activation of caspases that cleave a limited number of proteins. One of these proteins is nucleophosmin (NPM1), a multifunctional and ubiquitous protein. Here, we show that caspases activated in monocytes exposed to M-CSF cleave NPM1 at D213 to generate a 30-kDa N-terminal fragment. The protein is further cleaved into a 20-kDa fragment, which involves cathepsin B. NPM1 fragments contribute to the limited motility, migration, and phagocytosis capabilities of resting macrophages. Their activation with lipopolysaccharides …

Macrophage colony-stimulating factorLipopolysaccharidesCellular differentiationImmunologyBiochemistryProinflammatory cytokine03 medical and health sciencesPhagocytes Granulocytes and MyelopoiesisMice0302 clinical medicineAnimalsHumansNuclear proteinCaspaseCells Cultured030304 developmental biologyMice Knockout0303 health sciencesNucleophosminbiologyMacrophage Colony-Stimulating FactorMacrophagesNuclear ProteinsCell DifferentiationCell BiologyHematologyMacrophage ActivationNFKB1Molecular biologyCathepsinsCell biologyProtein Structure TertiaryCXCL1Mice Inbred C57BL030220 oncology & carcinogenesisCaspasesbiology.proteinNucleophosminProtein Processing Post-TranslationalBlood
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Influence of molecular subgroups on outcome of acute myeloid leukemia with normal karyotype in 141 patients undergoing salvage allogeneic stem cell t…

2012

Based on molecular aberrations, in particular the NPM1 mutation (NPM1(mut)) and the FLT3 internal tandem duplication (Flt3-ITD), prognostic subgroups have been defined among patients with acute myeloid leukemia with normal karyotype. Whereas these subgroups are known to play an important role in outcome in first complete remission, and also in the indication for allogeneic stem cell transplantation, data are limited on their role after transplantation in advanced disease. To evaluate the role of molecular subgroups of acute myeloid leukemia with normal karyotype after allogeneic stem cell transplantation beyond first complete remission, we analyzed the data from 141 consecutive adults (medi…

MaleOncologyTransplantation Conditioningmedicine.medical_treatmentHematopoietic stem cell transplantation0302 clinical medicineRecurrenceAntineoplastic Combined Chemotherapy ProtocolsHematopoietic Stem Cell TransplantationNuclear ProteinsMyeloid leukemiaInduction ChemotherapyHematologyMiddle Aged3. Good healthFludarabineTreatment OutcomeLeukemia Myeloid030220 oncology & carcinogenesisAcute DiseaseFemaleNucleophosminmedicine.drugAdultmedicine.medical_specialtyAllogeneic transplantationAdolescentPrimary Induction FailureKaryotypeDisease-Free SurvivalYoung Adult03 medical and health sciencesInternal medicinemedicineHumansTransplantation HomologousAgedSalvage Therapybusiness.industryMinimal residual diseaseSurgeryTransplantationfms-Like Tyrosine Kinase 3Multivariate AnalysisMutationTransplantation ConditioningOriginal Articles and Brief ReportsbusinessFollow-Up Studies030215 immunology
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Synergistic targeting of FLT3 mutations in AML via combined menin-MLL and FLT3 inhibition

2020

Abstract The interaction of menin (MEN1) and MLL (MLL1, KMT2A) is a dependency and provides a potential opportunity for treatment of NPM1-mutant (NPM1mut) and MLL-rearranged (MLL-r) leukemias. Concomitant activating driver mutations in the gene encoding the tyrosine kinase FLT3 occur in both leukemias and are particularly common in the NPM1mut subtype. In this study, transcriptional profiling after pharmacological inhibition of the menin-MLL complex revealed specific changes in gene expression, with downregulation of the MEIS1 transcription factor and its transcriptional target gene FLT3 being the most pronounced. Combining menin-MLL inhibition with specific small-molecule kinase inhibitors…

NPM1Transcription GeneticImmunologyApoptosisBiochemistryMiceRandom AllocationMice Inbred NODCell Line TumorProto-Oncogene Proteinshemic and lymphatic diseasesAntineoplastic Combined Chemotherapy ProtocolsGene expressionmedicineAnimalsHumansMEN1PhosphorylationMyeloid Ecotropic Viral Integration Site 1 ProteinProtein Kinase InhibitorsneoplasmsbiologyGene Expression Regulation LeukemicKinaseNuclear ProteinsMyeloid leukemiaDrug SynergismHistone-Lysine N-MethyltransferaseCell BiologyHematologymedicine.diseaseCoculture TechniquesNeoplasm ProteinsLeukemia Myeloid AcuteLeukemiaKMT2Afms-Like Tyrosine Kinase 3biology.proteinCancer researchNucleophosminProtein Processing Post-TranslationalTyrosine kinaseMyeloid-Lymphoid Leukemia ProteinBlood
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