Search results for " phosphatase"

showing 10 items of 329 documents

Ras/Raf/MEK/ERK and PI3K/PTEN/Akt/mTOR cascade inhibitors: How mutations can result in therapy resistance and how to overcome resistance

2012

// James A. McCubrey 1 , Linda S. Steelman 1 , William H. Chappell 1 , Stephen L. Abrams 1 , Richard A. Franklin 1 , Giuseppe Montalto 2 , Melchiorre Cervello 3 , Massimo Libra 4 , Saverio Candido 4 , Grazia Malaponte 4 , Maria C. Mazzarino 4 , Paolo Fagone 4 , Ferdinando Nicoletti 4 , Jorg Basecke 5 , Sanja Mijatovic 6 , Danijela Maksimovic-Ivanic 6 , Michele Milella 7 , Agostino Tafuri 8 , Francesca Chiarini 9 , Camilla Evangelisti 9 , Lucio Cocco 10 , Alberto M. Martelli 9,10 1 Department of Microbiology and Immunology, Brody School of Medicine at East Carolina University, Greenville, NC, USA 2 Department of Internal Medicine and Specialties, University of Palermo, Palermo, Italy 3 Consi…

MAPK/ERK pathwaymedicine.medical_treatmentPI3KTargeted therapyTargeted therapyPhosphatidylinositol 3-Kinases0302 clinical medicineNeoplasmsTreatment resistanceExtracellular Signal-Regulated MAP KinasesPhosphoinositide-3 Kinase InhibitorsGenetics0303 health sciencesbiologyCancer stem cellsTOR Serine-Threonine KinasesMAP Kinase Kinase KinasesDiscovery and development of mTOR inhibitorshumanities3. Good healthOncology030220 oncology & carcinogenesismTORSignal TransductionProto-Oncogene Proteins B-rafReviewsAntineoplastic Agents03 medical and health sciencesCell Line TumormedicineHumansPTENProtein kinase BPI3K/AKT/mTOR pathway030304 developmental biologybusiness.industryAkt; Cancer stem cells; mTOR; PI3K; Raf; Targeted therapy; Therapy resistanceAktPTEN PhosphohydrolaseTherapy resistanceRafProtein phosphatase 2Targeted Therapy Therapy Resistance Cancer Stem Cells Raf Akt PI3K mTORDrug Resistance NeoplasmMutationras ProteinsCancer researchbiology.proteinbusinessProto-Oncogene Proteins c-akt

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Gallium modulates osteoclastic bone resorption in vitro without affecting osteoblasts.

2010

Gallium (Ga) has been shown to be effective in the treatment of disorders associated with accelerated bone loss, including cancer-related hypercalcemia and Paget's disease. These clinical applications suggest that Ga could reduce bone resorption. However, few studies have studied the effects of Ga on osteoclastic resorption. Here, we have explored the effects of Ga on bone cells in vitro.In different osteoclastic models [osteoclasts isolated from long bones of neonatal rabbits (RBC), murine RAW 264.7 cells and human CD14-positive cells], we have performed resorption activity tests, staining for tartrate resistant acid phosphatase (TRAP), real-time polymerase chain reaction analysis, viabili…

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Use of CDC2 from etoposide-treated cells as substrate to assay CDC25 phosphatase activity

1999

International audience; Cyclin-dependent kinases (CDKs) regulate the key transition of the cell cycle in all organisms. In response to Etoposide (VP-16) induced DNA damage, cells undergo a G2-phase arrest resulting in the accumulation of inactive CDK1 (CDC2) kinase complexes. Here we report that upon Etoposide treatment CDC2 is phosphorylated on tyrosine 15 and is dephosphorylated and activated in vitro by recombinant CDC25 phosphatase. We also show that inactive CDC2 kinase from Etoposide-treated cells can be used as a substrate in a sensitive two-step assay of CDC25 phosphatase. This assay, which is very simple to set-up, is based on the monitoring of CDC2 kinase activity after CDC25-depe…

MESH: HumansMESH: Phosphorylation[SDV]Life Sciences [q-bio]Cell Cycle Proteins[SDV.BC.BC]Life Sciences [q-bio]/Cellular Biology/Subcellular Processes [q-bio.SC]MESH: CDC2 Protein KinaseMESH: Tyrosine[SDV] Life Sciences [q-bio]AGENT ANTITUMORALenzymes and coenzymes (carbohydrates)MESH: Cell Cycle ProteinsMESH: cdc25 PhosphatasesCDC2 Protein KinaseMESH: HeLa CellsMESH: Phosphoprotein PhosphatasesPhosphoprotein PhosphatasesHumansTyrosinecdc25 PhosphatasesPhosphorylationbiological phenomena cell phenomena and immunityEtoposideHeLa CellsMESH: Etoposide

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Increased Level of Phosphotyrosine in Human Dendritic Cells under Stimulation with Contact Sensitizers but Not Irritants

1997

In the last years evidence was presented for the activation of dendritic cells (DC) under stimulation with contact sensitizers. Most data were obtained for murine Langerhans cells (LC) whereas in man blood-derived dendritic cells were found to be a more suitable model to study the mechanism of DC activation by haptens. The first observation was the upregulation of MHC class II molecules on murine Langerhans cells in vivo1 followed by their migration from the epidermis into regional lymph nodes2. Very early events during this activation include the upregulation of IL-1s in murine LC3 as well as the endocytotic activation of this cell type4. Based on the last observation attempts were made to…

MHC class IIEpidermis (botany)biologyChemistryCellProtein tyrosine phosphataseIn vitroCell biologymedicine.anatomical_structureDownregulation and upregulationImmunologymedicinebiology.proteinPhosphorylationSignal transduction

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Identification of the phosphoglycerate dehydrogenase isoform EDA9 as the essential gene for embryo and male gametophyte development in Arabidopsis

2013

[EN] Three different pathways of serine (Ser) biosynthesis have been described in plants: the Glycolate pathway, which is part of the Photorespiratory pathway, and 2 non-Photorespiratory pathways, the Glycerate and the Phosphorylated pathways. The Phosphorylated Pathway of Ser Biosynthesis (PPSB) has been known to exist since the 1950s, but its biological relevance was not revealed until quite recently when the last enzyme of the pathway, the Phosphoserine Phosphatase, was functionally characterized. In the associated study1, we characterized a family of genes coding for putatite phosphoglycerate dehydrogenases (PGDH, 3-PGDH, and EDA9), the first enzyme of the PPSB. A metabolomics study usi…

Male gametophyteShort CommunicationArabidopsisPlant ScienceBiologyEmbryo developmentGenes PlantGene Expression Regulation EnzymologicSerinechemistry.chemical_compoundBiosynthesisGene Expression Regulation PlantArabidopsisBIOQUIMICA Y BIOLOGIA MOLECULARSerinePhosphoglycerate dehydrogenasePhosphorylationGenePhosphoglycerate DehydrogenasePhosphoglycerate dehydrogenasePhosphoglycerate kinaseGenes EssentialArabidopsis ProteinsPhosphoserine phosphatasePhosphorylated pathway of serine biosynthesisbiology.organism_classificationBiosynthetic PathwaysIsoenzymeschemistryBiochemistryEssential geneSeedsPollen

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The essential role of the phosphorylated pathway of serine biosynthesis inArabidopsis

2013

[EN] In plants, 3 different pathways of serine biosynthesis have been described: the Glycolate pathway, which is associated with photorespiration, and 2 non-photorespiratory pathways, the Glycerate and the Phosphorylated pathways. The Phosphorylated Pathway of Serine Biosynthesis (PPSB) has been known since the 1950s, but has been studied relatively little, probably because it was considered of minor significance as compared with the Glycolate pathway. In the associated study1 , we described for the first time in plants the in vivo functional characterization of the PPSB, by targeting the phosphoserine phosphatase (PSP1), the last enzyme of the pathway. Following a gain—and loss-of-function…

Male gametophyteShort CommunicationGreen Fluorescent ProteinsArabidopsisPlant ScienceBiologySerinechemistry.chemical_compoundBiosynthesisArabidopsisBIOQUIMICA Y BIOLOGIA MOLECULARSerineGlycolysisPhosphorylationchemistry.chemical_classificationArabidopsis ProteinsPhosphoserine phosphataseMetabolismPhosphorylated pathway of serine biosynthesisbiology.organism_classificationPhosphoric Monoester HydrolasesBiosynthetic PathwaysAmino acidRoot and embryo developmentBiochemistrychemistryMutationPhosphorylationPhosphoserine phosphatasePlant Signaling & Behavior

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Pancreatic Protein Tyrosine Phosphatase 1B Deficiency Exacerbates Acute Pancreatitis in Mice

2016

Acute pancreatitis (AP) is a common and devastating gastrointestinal disorder that causes significant morbidity. The disease starts as local inflammation in the pancreas that may progress to systemic inflammation and complications. Protein tyrosine phosphatase 1B (PTP1B) is implicated in inflammatory signaling, but its significance in AP remains unclear. To investigate whether PTP1B may have a role in AP, we used pancreas PTP1B knockout (panc-PTP1B KO) mice and determined the effects of pancreatic PTP1B deficiency on cerulein- and arginine-induced acute pancreatitis. We report that PTP1B protein expression was increased in the early phase of AP in mice and rats. In addition, histological an…

Male0301 basic medicineWistarSystemic inflammationMedical and Health SciencesOral and gastrointestinalMicePathology2.1 Biological and endogenous factorsAetiologyNon-Receptor Type 1CancerMice KnockoutProtein Tyrosine Phosphatase Non-Receptor Type 1Pancreatitis Acute NecrotizingReverse Transcriptase Polymerase Chain ReactionRegular Articlemedicine.anatomical_structureAcute NecrotizingGastrointestinal disorderAcute pancreatitisTumor necrosis factor alphamedicine.symptomPancreashormones hormone substitutes and hormone antagonistsmedicine.medical_specialtyKnockoutInflammationPathology and Forensic MedicineProinflammatory cytokinePancreatic Cancer03 medical and health sciencesRare DiseasesInternal medicinemedicineAnimalsRats WistarAnimalbusiness.industrymedicine.diseaseRatsDisease Models Animal030104 developmental biologyEndocrinologyPancreatitisDisease ModelsPancreatitisProtein Tyrosine PhosphataseDigestive DiseasesbusinessThe American Journal of Pathology

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SARS CoV2 infection _The longevity study perspectives

2021

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MaleAgingssRNA single-stranded RNARFLP restriction fragment length polymorphismHSPs heat shock proteinsReviewPTMs post-translational modificationsSevere Acute Respiratory SyndromeBiochemistryHIV-1 human immunodeficiency virus-1TNF-α tumor necrosis factor-αEC endothelial cells0302 clinical medicineFluAV influenza A virusI insertionMedicineIFN-γ interferon-γDIC disseminated intravascular coagulationPCR Polymerase Chain Reactionmedia_commonAged 80 and overLongevityRBD receptor-binding domainNeurologyLongevity modelMI myocardial infarctionNK natural killerhPIV2 human parainfluenza virus type 2media_common.quotation_subjectResearching genetic basis of resistance and potential pharmacological targetsLongevityDBP diastolic blood pressureNF-Kb nuclear transcription factor kBRANTES regulated upon activation normal T cell expressed and secretedMphi human macrophages03 medical and health sciencesCox 2 cyclooxygenase 2ORF open reading framePT prothrombin timeSettore MED/05 - Patologia ClinicaHumansMolecular BiologyInflammatory genesARDS acute respiratory distress syndromeNO nitric oxideD deletionCpGIs CpG islandsT2DM type 2 diabetes mellitusmedicine.diseaseFDP fibrin degradation products030104 developmental biologySARS CoV2 severe acute respiratory syndrome Coronavirus 2 virusImmunologyBMI body max indexItalian nonagenarians/centenariansRSV respiratory syncytial virusComplication030217 neurology & neurosurgeryMAPK mitogen-activated protein kinaseIP-10 IFN-γ -Inducible Protein 1040301 basic medicineAT1R activity of angiotensin 1 receptorsDCs dentritic cellsSSCP single strand conformation polymorphismACE/DD polymorphism of the angiotensin converting enzymeFGF21 fibroblast growth factor 21TLR4 toll-like receptor 4NAD nicotinamide adenine dinucleotideACE angiotensin-I converting enzymeAT2R activity of angiotensin 2 receptorsCOVID-19 Coronavirus disease 2019Respiratory distressACE2 angiotensin converting enzyme 2MKP-1 mitogen-activated protein kinase phosphatase-1 ()PD protease domainSNP single nucleotide polymorphismEH essential hypertensionTNFR tumor necrosis factor receptorINR international normalized ratio of the prothrombin timePAI-1 plasminogen activator inhibitor-1Ang angiotensinLPS lipopolysaccharideMCP1 monocyte chemoattractant protein-1medicine.symptomaPTT partial thromboplastin timeBiotechnologyDUSP1 dual specificity phosphatase 1Coronavirus disease 2019 (COVID-19)PC prostate cancerRAS renin-angiotensin aldosterone systemCCR5Δ32 genetic variant of chemokine receptorCOVID-19 Researching genetic basis of resistance and potential pharmacological targets Italian nonagenarians/centenarians Longevity modelAsymptomaticSARS-1 severe acute respiratory syndrome virus 1SIRT-1 Sirtuin 1Th1 t-helper lymphocyte type 1Immune systemROS reactive oxygen speciesTGF-β transforming growth factor betaET-1 endothelin-1ComputingMethodologies_COMPUTERGRAPHICSADAM-17 metallopeptidase domain 17business.industrySARS-CoV-2SBP systolic blood pressureCOVID-19HDACs histone deacetylasesComorbidityImmune Systembusiness5-LO lipoxygenase 5Ageing Research Reviews

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Associations between atopic diseases and the polymorphic systems ABO, Kidd, Inv and red cell acid phosphatase.

1979

In 239 German patients with atopic conditions (atopic dermatitis, hay fever, allergic rhinitis, bronchial asthma, and acute urticaria) the phenotype and gene distribution of 15 genetic blood polymorphisms (ABO, MNSs, rhesus, P, Kell, Duffy, Kidd, Hp, Gc, Gm, Inv, aP, PGM1, EsD, and 6-PGD) were analyzed and compared with those in 151 selected controls (individuals clinically free of allergic conditions and without allergy in the family history). The incidence of blood group antigens A and B was somewhat higher in patients than in controls. These observations are in accordance with the results of previous studies in other populations. In addition, our observations favor the hypothesis that th…

MaleAllergyErythrocytesAcid PhosphataseBiologyABO Blood-Group SystemGene FrequencyABO blood group systemPGM1GeneticsmedicineHypersensitivityHumansKidd Blood-Group SystemFamily historyGenetics (clinical)AsthmaIncidence (epidemiology)Germany WestAtopic dermatitismedicine.diseaseImmunologyBlood Group AntigensHay feverFemaleImmunoglobulin Light ChainsHuman genetics

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Vitamin E activates CRABP-II gene expression in cultured human fibroblasts, role of protein kinase C

2004

The treatment of human fibroblasts with different tocopherols in the presence of retinol caused an increase in cytoplasmic retinoic acid binding protein II (CRABP-II) mRNA and protein. The possibility of an involvement of protein kinase C (PKC) in the response to tocopherols was supported by the results obtained with the PKC-specific inhibitors, calphostin C and bisindolylmaleimide I. The effect of alpha-tocopherol was prevented by okadaic acid, suggesting that a protein phosphatase is responsible for PKC dephosphorylation produced by the presence of tocopherols. The results shown support the hypothesis that phosphorylation/dephosphorylation of RXRalpha via PKC may be involved in the regula…

MaleBisindolylmaleimideTranscription GeneticReceptors Retinoic AcidPhosphatasealpha-TocopherolBiophysicsBiochemistryDephosphorylationchemistry.chemical_compoundStructural BiologyProtein kinase COkadaic AcidGeneticsHumansVitamin ERNA MessengerRetinoic acid bindingPhosphorylationMolecular BiologyProtein kinase CCells CulturedDNA PrimersBase SequenceReverse Transcriptase Polymerase Chain ReactionInfant NewbornRetinoid X receptor αCell BiologyMolecular biologyRetinoic acid receptorCalphostin CchemistryGene Expression RegulationProtein phosphatasePhosphorylationFibroblastCytoplasmic retinoic acid binding protein IIFEBS Letters

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