Search results for "Urokinase receptor"

showing 5 items of 5 documents

Expression pattern of the urokinase-plasminogen activator system in rat DS-sarcoma: Role of oxygenation status and tumour size

2002

The urokinase plasminogen activator system plays a central role in malignant tumour progression. Both tumour hypoxia and enhancement of urokinase plasminogen activator, urokinase plasminogen activator-receptor and plasminogen activator inhibitor type 1 have been identified as adverse prognostic factors. Upregulation of urokinase plasminogen activator or plasminogen activator inhibitor type 1 could present means by which hypoxia influences malignant progression. Therefore, the impact of hypoxia on the expression pattern of the urokinase plasminogen activator system in rat DS-sarcoma in vivo and in vitro was examined. In the in vivo setting, tumour cells were implanted subcutaneously into rat…

Cancer Researchplasminogen activator inhibitor type-1DS-sarcomaEnzyme-Linked Immunosorbent AssayReceptors Cell Surfaceurokinase plasminogen activator receptorBiologyReceptors Urokinase Plasminogen Activatorchemistry.chemical_compoundDownregulation and upregulationIn vivoPlasminogen Activator Inhibitor 1Tumor Cells CulturedmedicineAnimalsExperimental TherapeuticsZymographyRNA Messengerurokinase plasminogen activatorHyperoxiaUrokinasehypoxiaReverse Transcriptase Polymerase Chain ReactionGene Expression ProfilingSarcomamalignant progressionUrokinase-Type Plasminogen ActivatorMolecular biologyIn vitroRatsGene Expression Regulation NeoplasticOxygenUrokinase receptorOncologychemistryOrgan SpecificityPlasminogen activator inhibitor-1medicine.symptommedicine.drugBritish Journal of Cancer
researchProduct

Urokinase Plasminogen Activator and Gelatinases Are Associated with Membrane Vesicles Shed by Human HT1080 Fibrosarcoma Cells

1997

Membrane vesicles are shed by tumor cells both in vivo and in vitro. Although their functions are not well understood, it has been proposed that they may play multiple roles in tumor progression. We characterized membrane vesicles from human HT1080 fibrosarcoma cell cultures for the presence of proteinases involved in tumor invasion. By gelatin zymography and Western blotting, these vesicles showed major bands corresponding to the zymogen and active forms of gelatinase B (MMP-9) and gelatinase A (MMP-2) and to the MMP-9. tissue inhibitor of metalloproteinase 1 complex. Both gelatinases appeared to be associated with the vesicle membrane. HT1080 cell vesicles also showed a strong, plasminoge…

GelatinasesMacromolecular SubstancesFibrosarcomaBlotting WesternCellGelatinase ABiologyBiochemistryTumor Cells CulturedmedicineHumansCollagenasesFibrinolysinMolecular BiologyGlycoproteinsUrokinaseEnzyme PrecursorsVesicleMetalloendopeptidasesTissue Inhibitor of MetalloproteinasesCell BiologyTissue inhibitor of metalloproteinaseUrokinase-Type Plasminogen ActivatorMolecular biologyExtracellular MatrixUrokinase receptorBloodmedicine.anatomical_structureMatrix Metalloproteinase 9GelatinasesMatrix Metalloproteinase 2HT1080medicine.drugJournal of Biological Chemistry
researchProduct

Urokinase-plasminogen-activator receptor expression in disseminated tumour cells in the bone marrow and peripheral blood of patients with clinically …

2009

OBJECTIVE To evaluate the expression of urokinase-plasminogen-activator receptor (uPA-R) in disseminated tumour cells (DTC) in bone marrow (BM) and peripheral blood (PB) of patients with clinically localized prostate cancer before radical prostatectomy (RP), and to assess the associations with pathological variables and prognosis. PATIENTS AND METHODS In all, 52 patients (47 with clinically localized cancer and five with benign prostatic hyperplasia, BPH, as controls) were prospectively enrolled. BM and PB samples were drawn before surgery. DTC were enriched using a commercial system, cytokeratin (CK) 8/18 was used to detect DTC, and uPA-R expression was detected by dual-immunostaining of t…

Malemedicine.medical_specialtyPathologyUrologyReceptor expressionmedicine.medical_treatmentGastroenterologyReceptors Urokinase Plasminogen ActivatorCytokeratinProstate cancerBone MarrowInternal medicinemedicineBiomarkers TumorHumansAgedProstatectomybusiness.industryProstatectomyCancerProstatic NeoplasmsHyperplasiaMiddle AgedProstate-Specific Antigenmedicine.diseaseNeoplastic Cells CirculatingPrognosisImmunohistochemistryUrokinase receptormedicine.anatomical_structureLymphatic MetastasisBone marrowNeoplasm Recurrence LocalbusinessEpidemiologic MethodsBJU international
researchProduct

Endothelial cells and normal breast epithelial cells enhance invasion of breast carcinoma cells by CXCR-4-dependent up-regulation of urokinase-type p…

2008

Here we show the increase of invasion of three breast cancer cell lines (8701-BC, MDA-MB-231 and SKBR3) upon long-term co-incubation with culture medium of normal microvascular endothelial cells (MVEC) and normal breast epithelial cells (HB2). The enhancement of invasion relied on the interaction of microvascular endothelial cell and normal breast epithelial cell CXCL12 (SDF1) chemokine, whose expression by breast cancer cells was very low, with the cognate CXCR4 receptor of malignant cells, which resulted in over-expression of the urokinase-type plasminogen activator receptor (uPAR) on their surfaces. uPAR over-expression, showed by RT-PCR and Western blotting, was paralleled by increased …

Receptors CXCR4MAP Kinase Kinase 4AngiogenesisCellBreast NeoplasmsReceptors Cell SurfaceCell CommunicationBiologyCell LineReceptors Urokinase Plasminogen ActivatorPathology and Forensic MedicineMetastasisangiogenesisbreast cancerTumor Cells CulturedmedicineHumansNeoplasm InvasivenessBreastSettore BIO/06 - Anatomia Comparata E CitologiaPhosphorylationskin and connective tissue diseasesCXCR4Settore MED/04 - Patologia GeneraleNeovascularization PathologicReverse Transcriptase Polymerase Chain ReactionFibrinolysisEpithelial CellsCXCL12invasionmedicine.diseasemicroenvironmentChemokine CXCL12Neoplasm ProteinsUp-RegulationEndothelial stem cellUrokinase receptormedicine.anatomical_structureCulture Media ConditionedCancer cellCancer researchFemaleJNKEndothelium VascularBreast diseaseSDF1uPARPlasminogen activatorThe Journal of Pathology
researchProduct

Urokinase activates macrophage PON2 gene transcription via the PI3K/ROS/MEK/SREBP-2 signalling cascade mediated by the PDGFR-β

2009

Aims We have recently shown that urokinase plasminogen activator (uPA) increases oxidative stress (OS), cholesterol biosynthesis, and paraoxonase 2 (PON2) expression in macrophages via binding to its receptor, the uPAR. Since PON2 is regulated by both OS and cholesterol content, we hypothesized that uPA elicits a cascade of signal transduction events shared by NADPH oxidase and cholesterol biosynthesis that culminates in PON2 gene expression. Here, we investigated the signalling pathway that leads to the expression of PON2 in macrophages in response to uPA. Methods and results The increase in macrophage PON2 mRNA levels in response to uPA was shown to depend on PON2 gene promoter activation…

Transcription GeneticPhysiologyReceptor Platelet-Derived Growth Factor betaPhosphatidylinositol 3-KinasesPhysiology (medical)Gene expressionHumansExtracellular Signal-Regulated MAP KinasesTranscription factorCells CulturedMitogen-Activated Protein Kinase KinasesRegulation of gene expressionNADPH oxidasebiologyAryldialkylphosphataseKinaseMacrophagesNADPH OxidasesUrokinase-Type Plasminogen ActivatorCell biologySterol regulatory element-binding proteinUrokinase receptorGene Expression RegulationBiochemistryTissue Plasminogen Activatorbiology.proteinSignal transductionReactive Oxygen SpeciesCardiology and Cardiovascular MedicineSignal TransductionSterol Regulatory Element Binding Protein 2Cardiovascular Research
researchProduct