Search results for " Endothelin"

showing 10 items of 34 documents

Mechanisms underlying diabetes enhancement of endothelin-1-induced contraction in rabbit basilar artery

2004

The influence of alloxan-induced diabetes on the reactivity of rabbit basilar artery to endothelin-1 was examined. Endothelin-1 induced concentration-dependent contraction of basilar arteries that was higher in diabetic than in control rabbits. Endothelium removal produced a higher enhancement of the endothelin-1-induced contraction in control than in diabetic rabbits. N(G)-nitro-L-arginine (L-NOArg) enhanced the maximal contraction induced by endothelin-1 in control rabbits and potentiated this response in diabetic rabbits. Endothelin ETA receptor antagonist, cyclo(D-Asp-Pro-D-Val-Leu-D-Trp) (BQ-123), inhibited endothelin-1-induced contraction in both rabbit groups. Endothelin ETB receptor…

Endothelin Receptor AntagonistsMaleNitroprussidemedicine.medical_specialtyContraction (grammar)Vascular smooth muscleEndotheliumEndothelin A Receptor AntagonistsVasodilator AgentsEndothelin B Receptor AntagonistsNitroargininePeptides CyclicMuscle Smooth VascularDiabetes Mellitus ExperimentalPiperidinesIsometric Contractionmedicine.arteryInternal medicinemedicineBasilar arteryAnimalsEnzyme InhibitorsAntihypertensive AgentsPharmacologyDiabetisEndothelin-1Artèriesbusiness.industryEndoteli vascularReceptor Endothelin AReceptor Endothelin BEndothelin 1Òxid nítricEndothelin A Receptor AntagonistsEndothelin B Receptor AntagonistsEndocrinologymedicine.anatomical_structureBasilar Arterycardiovascular systemRabbitsbusinessEndothelin receptorOligopeptidesEuropean Journal of Pharmacology
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Intravenous BQ-123 and phosphoramidon reduce ventricular ectopic beats and myocardial infarct size in dogs submitted to coronary occlusion and reperf…

2001

Abstract The aim of this work was to investigate the influence of endothelin on myocardial ischemia and reperfusion in anaesthetized dogs. Animals were submitted to left thoracotomy and 120 min of left anterior descending coronary occlusion, followed by 180 min of reperfusion. Arterial blood pressure and electrocardiogram (ECG) were recorded in order to analyze heart rate (HR)–pressure product and production of ectopic beats. Infarcted areas were identified by a macroscopic staining method and infarct size was expressed as percentage of risk zone. To inhibit the effects of endothelin in a group of animals, we administered intravenously an endothelin synthesis inhibitor (phosphoramidon) and …

Endothelin Receptor Antagonistsmedicine.medical_specialtyMyocardial InfarctionIschemiaBlood PressureCoronary DiseaseMyocardial ReperfusionPeptides Cyclicchemistry.chemical_compoundDogsInternal medicineHeart rateAnimalsMedicinecardiovascular diseasesMyocardial infarctionAntihypertensive AgentsPharmacologyBQ-123Endothelin-1Receptors Endothelinbusiness.industryPhosphoramidonGlycopeptidesReceptor Endothelin Amedicine.diseaseVentricular Premature ComplexesBlood pressurechemistryCoronary occlusionAnesthesiaInjections IntravenousVentricular Fibrillationcardiovascular systemCardiologyDrug Therapy CombinationbusinessEndothelin receptorGeneral Pharmacology: The Vascular System
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Subtype-specific endothelin-A and endothelin-B receptor desensitization correlates with differential receptor phosphorylation.

1998

In the rat cardiovascular system endothelin-1 (ET-1) elicits prolonged physiologic responses mediated by the ET A receptor, whereas the effects mediated by the ET B receptor are transient. The molecular mechanisms for the subtype-specific responses are not yet clear. However, post-translational modifications such as phosphorylation and palmitoylation may play an important role. In Sf9 cells overexpressing the human ET A and ET B receptors, both subtypes are palmitoylated. However, only the ET B but not the ET A receptor is phosphorylated in a ligand-dependent manner. Because phosphorylation is believed to play an important role in ligand-dependent receptor inactivation, we analyzed whether …

Endothelin Receptor Antagonistsmedicine.medical_specialtyTropomyosin receptor kinase BCHO CellsBiologyEstrogen-related receptor alphaInternal medicineCricetinaemedicineEnzyme-linked receptorAnimalsHumansCloning MolecularPhosphorylationReceptorProtease-activated receptor 2Insulin-like growth factor 1 receptorPharmacologyReceptors EndothelinInterleukin-13 receptorReceptor Endothelin AReceptor Endothelin BCell biologyRatsInterleukin 10KineticsEndocrinologyCardiology and Cardiovascular MedicineSignal TransductionJournal of cardiovascular pharmacology
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Endothelin-1 modulates the expression of adhesion molecules on fibroblast-like synovial cells (FLS)

1996

Endothelin-1 is known to possess various biological properties. In the present study we have investigated the effects of Endothelin-1 (Et-1) on the expression of adhesion molecules ICAM-1, VCAM-1 and CD-44 by fibroblast-like synoviocytes. Cultured fibroblast-like synoviocytes were treated with Et-1 in the absence or presence of C1306, a specific endothelin-A-receptor antagonist. Cell surface expression of ICAM-1, VCAM-1 and CD-44 was determined by immunofluorescence studies, Cyto-ELISA and FACS-analysis. ICAM-1, VCAM-1 and CD-44 were constitutively expressed on cultured FLS. After incubation with Et-1 the expression of ICAM-1, VCAM-1 and CD-44 increased. The level of expression of adhesion …

Endothelin Receptor Antagonistsmedicine.medical_specialtymedicine.medical_treatmentImmunologyVascular Cell Adhesion Molecule-1BiologyProinflammatory cytokineRheumatologyDownregulation and upregulationInternal medicinemedicineHumansImmunology and AllergyCells CulturedEndothelin-1Tumor Necrosis Factor-alphaCell adhesion moleculeSynovial MembraneGeneral MedicineAdhesionFibroblastsIntercellular Adhesion Molecule-1Receptor Endothelin AIn vitroCell biologyHyaluronan ReceptorsCytokinemedicine.anatomical_structureEndocrinologyCell cultureSynovial membraneCell Adhesion MoleculesInterleukin-1
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Endothelin receptor B in trabecular meshwork

2007

Abstract Endothelin-1 (ET-1), the most potent vasoconstrictor known to date, seems to be involved in the pathogenesis of primary open angle glaucoma. ET-1 was found in different tissues of the eye and in high concentrations in the aqueous humour. The effects of ET-1 are mediated by two receptors, ET-A receptor (ET-AR) and ET-B receptor (ET-BR), which are both expressed in bovine trabecular meshwork (TM). ET-1 induced contraction of TM predominantly by activation of ET-AR. This study analyzes the role of ET-BR in TM function and investigates the synthesis of ET-1 by human TM (HTM) cells. The effect of IRL-1620, a specific ET-BR agonist, on contractility of bovine TM (BTM) was investigated wi…

Gene isoformAgonistmedicine.medical_specialtyCarbacholmedicine.drug_classBlotting WesternEndothelin-Converting EnzymesBiologyPolymerase Chain ReactionCellular and Molecular NeuroscienceWestern blotTrabecular MeshworkInternal medicinemedicineAnimalsAspartic Acid EndopeptidasesHumansReceptorCells CulturedEndothelin-1medicine.diagnostic_testReceptors EndothelinAqueous humourEndothelinsMetalloendopeptidasesReceptor Endothelin BMolecular biologyPeptide FragmentsSensory SystemsOphthalmologyEndocrinologymedicine.anatomical_structureCalciumCattlesense organsTrabecular meshworkEndothelin receptormedicine.drugExperimental Eye Research
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Coupling of endothelin receptors to the ERK/MAP kinase pathway. Roles of palmitoylation and G(alpha)q.

2001

Endothelins are potent mitogens that stimulate extracellular signal-regulated kinases (ERK/MAP kinases) through their cognate G-protein-coupled receptors, ET(A) and ET(B). To address the role of post-translational ET receptor modifications such as acylation on ERK activation and to identify relevant downstream effectors coupling the ET receptor to the ERK signaling cascades we have constructed a panel of palmitoylation-deficient ET receptor mutants with differential G(alpha) protein binding capacity. Endothelin-1 stimulation of wild-type ET(A) or ET(B) induced a fivefold to sixfold increase in ERK in COS-7 and CHO cells whereas full-length nonpalmitoylated ET(A) and ET(B) mutants failed to …

MAPK/ERK pathwayGs alpha subunitInsectaMAP Kinase Signaling SystemBlotting WesternMolecular Sequence DataPalmitic AcidSRC Family Tyrosine KinaseBiochemistryCell LineCricetinaeArrestinTumor Cells CulturedAnimalsHumansAmino Acid SequenceReceptorMitogen-Activated Protein Kinase 1KinaseChemistryReceptors EndothelinCell MembraneHeterotrimeric GTP-Binding ProteinsCell biologyEnzyme ActivationErbB ReceptorsType C PhospholipasesCOS CellsMutationcardiovascular systemMutagenesis Site-DirectedPhosphorylationGTP-Binding Protein alpha Subunits Gq-G11Mitogen-Activated Protein KinasesProto-oncogene tyrosine-protein kinase SrcEuropean journal of biochemistry
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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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Polymorphisms in endothelin system genes, arsenic levels and obesity risk.

2015

Background/objectivesObesity has been linked to morbidity and mortality through increased risk for many chronic diseases. Endothelin (EDN) system has been related to endothelial function but it can be involved in lipid metabolism regulation: Receptor type A (EDNRA) activates lipolysis in adipocytes, the two endothelin receptors mediate arsenic-stimulated adipocyte dysfunction, and endothelin system can regulate adiposity by modulating adiponectin activity in different situations and, therefore, influence obesity development. The aim of the present study was to analyze if single nucleotide polymorphisms (SNPs) in the EDN system could be associated with human obesity.Subjects/methodsWe analyz…

MaleEspañaObesidad:Analytical Diagnostic and Therapeutic Techniques and Equipment::Diagnosis::Diagnostic Techniques and Procedures::Physical Examination::Body Constitution::Body Weights and Measures::Body Fat Distribution::Adiposity [Medical Subject Headings]Endothelins:Organisms::Eukaryota::Animals::Chordata::Vertebrates::Mammals::Primates::Haplorhini::Catarrhini::Hominidae::Humans [Medical Subject Headings]:Chemicals and Drugs::Biological Factors::Intercellular Signaling Peptides and Proteins::Endothelins [Medical Subject Headings]Polymorphism (computer science)Risk Factors:Analytical Diagnostic and Therapeutic Techniques and Equipment::Diagnosis::Diagnostic Techniques and Procedures::Physical Examination::Body Constitution::Body Weights and Measures::Body Size::Body Weight::Overweight::Obesity [Medical Subject Headings]:Chemicals and Drugs::Inorganic Chemicals::Elements::Arsenic [Medical Subject Headings]:Geographicals::Geographic Locations::Europe::Spain [Medical Subject Headings]education.field_of_studyMultidisciplinary:Diseases::Pathological Conditions Signs and Symptoms::Pathologic Processes::Disease Attributes::Chronic Disease [Medical Subject Headings]Genètica humanaEndothelinsQRMiddle AgedPrognosisReceptor Endothelin APolimorfismo de nucleótido único:Anatomy::Cells::Connective Tissue Cells::Adipocytes [Medical Subject Headings]ObesitatMedicineFemaleTomografía computarizada por rayos X:Phenomena and Processes::Genetic Phenomena::Genotype [Medical Subject Headings]Endothelin receptor:Analytical Diagnostic and Therapeutic Techniques and Equipment::Diagnosis::Diagnostic Techniques and Procedures::Diagnostic Imaging::Image Interpretation Computer-Assisted::Tomography X-Ray Computed [Medical Subject Headings]Research Articlemedicine.hormonemedicine.medical_specialtyGenotype:Phenomena and Processes::Mathematical Concepts::Probability::Risk [Medical Subject Headings]SciencePopulationSingle-nucleotide polymorphism:Phenomena and Processes::Metabolic Phenomena::Metabolism::Lipid Metabolism::Lipolysis [Medical Subject Headings]BiologyPolymorphism Single NucleotideArsenicReceptores de endotelinasInternal medicineAdipocitos:Chemicals and Drugs::Amino Acids Peptides and Proteins::Proteins::Membrane Proteins::Receptors Cell Surface::Receptors Peptide::Receptors Endothelin [Medical Subject Headings]medicineHumansGenetic Predisposition to DiseaseObesityeducation:Phenomena and Processes::Genetic Phenomena::Genetic Variation::Polymorphism Genetic::Polymorphism Single Nucleotide [Medical Subject Headings]AdiponectinHaplotypeEnfermedad crónicamedicine.diseaseObesityEndocrinologyHaplotypesSpain:Chemicals and Drugs::Biological Factors::Intercellular Signaling Peptides and Proteins::Adipokines::Adiponectin [Medical Subject Headings]GenotipoFollow-Up StudiesArsénicoPLoS ONE
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Lactoferricin B-derived peptides with inhibitory effects on ECE-dependent vasoconstriction

2010

Endothelin-converting enzyme (ECE), a key peptidase in the endothelin (ET) system, cleaves inactive big ET-1 to produce active ET-1, which binds to ET(A) receptors to exert its vasoconstrictor and pressor effects. ECE inhibition could be beneficial in the treatment of hypertension. In this study, a set of eight lactoferricin B (LfcinB)-derived peptides, previously characterized in our laboratory as angiotensin-converting enzyme (ACE) inhibitory peptides, was examined for their inhibitory effects on ECE. In vitro inhibitory effects on ECE activity were assessed using both the synthetic fluorogenic peptide substrate V (FPS V) and the natural substrate big ET-1. To study vasoactive effects, an…

MalePhysiologyPeptideEndothelin-Converting EnzymesPharmacologyInhibitory postsynaptic potentialBiochemistryCellular and Molecular NeuroscienceEndocrinologymedicineAnimalsAspartic Acid EndopeptidasesHumansReceptorchemistry.chemical_classificationEndothelin-1ChemistryMetalloendopeptidasesReceptor Endothelin AIn vitroIntracellular signal transductionLactoferrinBiochemistryVasoconstrictionHypertensionRabbitsmedicine.symptomPeptidesEndothelin receptorVasoconstrictionEx vivoSignal TransductionPeptides
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Cigarette smoke exposure up-regulates endothelin receptor B in human pulmonary artery endothelial cells: molecular and functional consequences

2010

BACKGROUND AND PURPOSEPulmonary arteries from smokers and chronic obstructive pulmonary disease patients show abnormal endothelium-dependent vascular reactivity. We studied the effect of cigarette smoke extract (CSE) on endothelin receptor B (ETB) expression in human pulmonary artery endothelial cells (HPAECs) and its role in endothelial dysfunction.EXPERIMENTAL APPROACHETB receptor expression was measured by real time RT-PCR, Western blot and immunofluorescence. Cell contraction, intracellular Ca2+, F/G-actin, RhoA activity, myosin light chain phosphorylation, ET, NO, thromboxane (Tx)A2 and reactive oxygen species (ROS) were measured by traction microscopy, fluorescence microscopy, phalloi…

MalePulmonary ArteryNitric OxideTransfectionMuscle Smooth Vascularendothelial dysfunctionendothelin receptor Bpulmonary artery endothelial cellsSmokeTobaccoHumansRNA Small InterferingCells CulturedAgedSulfonamidesrho-Associated KinasesEndothelin-1bosentancigarette smokeEndothelial CellsResearch PapersReceptor Endothelin BUp-RegulationThromboxane B2FemaleEndothelium VascularReactive Oxygen Species
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