Search results for "Cytoprotection"

showing 10 items of 49 documents

Galectin-3 Impairment of MYCN-Dependent Apoptosis-Sensitive Phenotype Is Antagonized by Nutlin-3 in Neuroblastoma Cells

2012

MYCN amplification occurs in about 20-25% of human neuroblastomas and characterizes the majority of the high-risk cases, which display less than 50% prolonged survival rate despite intense multimodal treatment. Somehow paradoxically, MYCN also sensitizes neuroblastoma cells to apoptosis, understanding the molecular mechanisms of which might be relevant for the therapy of MYCN amplified neuroblastoma. We recently reported that the apoptosis-sensitive phenotype induced by MYCN is linked to stabilization of p53 and its proapoptotic kinase HIPK2. In MYCN primed neuroblastoma cells, further activation of both HIPK2 and p53 by Nutlin-3 leads to massive apoptosis in vitro and to tumor shrinkage an…

Galectin 3Cancer TreatmentGene Dosagelcsh:MedicineApoptosisProtein-Serine-Threonine KinaseBiochemistryPiperazineschemistry.chemical_compoundNeuroblastoma0302 clinical medicineMolecular Cell BiologyBasic Cancer ResearchSignaling in Cellular Processeslcsh:ScienceEnergy-Producing OrganellesApoptotic SignalingNuclear ProteinOncogene Proteins0303 health sciencesN-Myc Proto-Oncogene ProteinMultidisciplinaryCell DeathImidazolesOncogene ProteinNuclear ProteinsTransfectionNutlin3. Good healthGene Expression Regulation NeoplasticProtein TransportCell killingPhenotypeOncologyGalectin-3030220 oncology & carcinogenesisGene Knockdown TechniquesMedicineResearch ArticleSignal TransductionHumanBiologyBioenergeticsProtein Serine-Threonine KinasesN-Myc Proto-Oncogene ProteinModels Biological03 medical and health sciencesNeuroblastomaCell Line TumormedicineHumansBiologyImidazolePiperazineneoplasms030304 developmental biologylcsh:RGene AmplificationChemotherapy and Drug Treatmentmedicine.diseasechemistryCell cultureApoptosisPediatric OncologyCytoprotectionGene Knockdown TechniqueCancer researchlcsh:QTumor Suppressor Protein p53Carrier ProteinsCarrier ProteinDNA Damage
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Conversion of biliverdin to bilirubin by biliverdin reductase contributes to endothelial cell protection by heme oxygenase-1—evidence for direct and …

2009

Heme oxygenase-1 (HO-1) is highly protective in various pathophysiological states such as cardiovascular and neurodegenerative diseases. HO-1-derived bilirubin is an efficient scavenger of reactive oxygen and nitrogen species (RONS). It remains to determine whether conversion of biliverdin to bilirubin is an essential step for HO-1-conferred protection of endothelial cells. RONS scavenging activities of biliverdin versus bilirubin were assessed by different RONS generating systems and detection techniques. We also silenced the biliverdin reductase (BVR) or HO-1 gene in cultured primary human endothelial cells (HUVECs) and measured the effect on RONS formation upon stimulation with lipopolys…

LipopolysaccharidesOxidoreductases Acting on CH-CH Group DonorsUmbilical VeinsXanthine OxidaseNeutrophilsBilirubinNitrosationModels BiologicalAntioxidantschemistry.chemical_compoundPeroxynitrous AcidLeukocytespolycyclic compoundsHumansGene SilencingMolecular BiologyHemeReactive nitrogen speciesRespiratory BurstBiliverdinAngiotensin IIBiliverdineBiliverdin reductaseEndothelial CellsBilirubinFree Radical ScavengersAngiotensin IIMitochondriaEndothelial stem cellHeme oxygenasechemistryBiochemistryCytoprotectionGene Knockdown TechniquesTyrosineReactive Oxygen SpeciesCardiology and Cardiovascular MedicineHeme Oxygenase-1Journal of Molecular and Cellular Cardiology
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Chemoprotective effect of carotenoids from Lycium barbarum L. on SH-SY5Y neuroblastoma cells treated with beauvericin

2020

Goji berry has recently been introduced in Mediterranean diet and its consumption is increasing. This study aims to determine cytoprotection of lutein (LUT), zeaxanthin (ZEAX) and goji berry extract (GBE) rich in carotenoids against Beauvericin (BEA)-induced cytotoxicity on SH-SY5Y neuroblastoma cells. Both carotenoids and GBE showed cytoprotective effects. Cytoprotection was evaluated by simultaneous combination of the two xanthophylls LUT and ZEAX with BEA, as well as using pre-treatment assays. The highest protective effect occurred in 16%, 24% and 12% respectively for LUT, ZEAX and LUT + ZEAX incubating simultaneously with BEA, while by pre-treatment assay LUT showed a cytoprotection ef…

LuteinToxicologyNeuroblastoma03 medical and health scienceschemistry.chemical_compound0404 agricultural biotechnologyfoodZeaxanthinsCell Line TumorDepsipeptidesHumansFood scienceCarotenoid030304 developmental biologychemistry.chemical_classification0303 health sciencesbiologyPlant ExtractsChemistryLuteinGoji berry04 agricultural and veterinary sciencesGeneral MedicineLyciumbiology.organism_classificationCarotenoids040401 food scienceCytoprotectionfood.foodBeauvericinZeaxanthinCytoprotectionXanthophyllLyciumFood ScienceFood and Chemical Toxicology
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Cytoprotective effects of carotenoids-rich extract from Lycium barbarum L. on the beauvericin-induced cytotoxicity on Caco-2 cells.

2019

Abstract In this work, the cytotoxicity of Beauvericin (BEA), lutein (LUT), zeaxanthin (ZEAX) and goji berries extract (GBE) rich in carotenoids, was investigated, as well as cytoprotective effects of these carotenoids against BEA induced-cytotoxicity on Caco-2 cells. Cytotoxicity was carried out using MTT and protein content (PC) assays during 24 and 48 h of exposure. Only BEA showed cytotoxic effect obtaining a reduction in cell proliferation range from 6.5 to 92.8%. Simultaneous combination of LUT and ZEAX with BEA slightly increased cell proliferation compared to BEA tested alone. LUT, ZEAX and GBE showed cytoprotective effects against cytotoxicity induced by BEA on Caco-2 cells. Pre-tr…

LuteinToxicologyProtective Agents03 medical and health scienceschemistry.chemical_compound0404 agricultural biotechnologyfoodZeaxanthinsDepsipeptidesHumansFood scienceCytotoxicityMycotoxinCarotenoid030304 developmental biologychemistry.chemical_classification0303 health sciencesPlant ExtractsGoji berryLuteinDrug Synergism04 agricultural and veterinary sciencesGeneral MedicineLyciumMycotoxins040401 food scienceCytoprotectionBeauvericinfood.foodZeaxanthinchemistryCytoprotectionFruitCaco-2 CellsFood ScienceFood and chemical toxicology : an international journal published for the British Industrial Biological Research Association
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Neuroprotection elicited by P2Y13 receptors against genotoxic stress by inducing DUSP2 expression and MAPK signaling recovery.

2014

AbstractNucleotides activating P2Y13 receptors display neuroprotective actions against different apoptotic stimuli in cerebellar granule neurons. In the present study, P2Y13 neuroprotection was analyzed in conditions of genotoxic stress. Exposure to cisplatin and UV radiation induced caspase-3-dependent apoptotic cell death, and p38 MAPK signaling de-regulation. Pre-treatment with P2Y13 nucleotide agonist, 2methyl-thio-ADP (2MeSADP), restored granule neuron survival and prevented p38 long-lasting activation induced by cytotoxic treatments. Microarray gene expression analysis in 2MeSADP-stimulated cells revealed over-representation of genes related to protein phosphatase activity. Among them…

MAPK/ERK pathwayAgonistmedicine.drug_classMAP Kinase Signaling SystemUltraviolet Raysp38 mitogen-activated protein kinasesDUSPp38Genotoxic StressCREBNeuroprotectionMAPK protein phosphataseModels Biologicalp38 Mitogen-Activated Protein KinasesNucleotide receptorP2Y13 receptorCa2+/calmodulin-dependent protein kinaseCerebellummedicineAnimalsPhosphorylationRats WistarReceptorMolecular BiologyCell NucleusNeuronsbiologyCell DeathCaspase 3Receptors Purinergic P2Dual Specificity Phosphatase 2Cell BiologyThionucleotidesNeuroprotectionCell biologyRatsAdenosine DiphosphateEnzyme ActivationNeuroprotective AgentsCytoprotectionbiology.proteinCisplatinDNA DamageBiochimica et biophysica acta
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Cajaninstilbene acid (CSA) exerts cytoprotective effects against oxidative stress through the Nrf2-dependent antioxidant pathway.

2013

Cajaninstilbene acid (CSA), an active compound separated from pigeon pea leaves, possesses the highly efficient antioxidant activities. Transcription factor nuclear factor-erythroid 2-related factor 2 (Nrf2) is an important regulator of cellular oxidative stress. This study examined the role of Nrf2 in CSA-mediated antioxidant effects on human hepatocarcinoma (HepG2) cell line. The generation of reactive oxygen species (ROS) upon H2O2 and CSA treatment was lower than that of H2O2 alone. CSA activated Nrf2 as evaluated by Western blotting. A luciferase reporter assay also demonstrated that CSA-activated signaling resulted in the increased transcriptional activity of Nrf2 through binding to t…

MAPK/ERK pathwayAntioxidantNF-E2-Related Factor 2medicine.medical_treatmentBlotting WesternBiologyToxicologymedicine.disease_causeenvironment and public healthAntioxidantsStilbenesmedicineNAD(P)H Dehydrogenase (Quinone)HumansProtein kinase BTranscription factorPI3K/AKT/mTOR pathwaychemistry.chemical_classificationReactive oxygen speciesGeneral MedicineHep G2 Cellsrespiratory systemAntioxidant Response ElementsSalicylatesOxidative StressBiochemistrychemistryCytoprotectionNAD+ kinaseOxidative stressHeme Oxygenase-1Signal TransductionToxicology letters
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Inhibition of iNOS activity by 1400W decreases glutamate release and ameliorates stroke outcome after experimental ischemia

2005

Background and purpose. It has been shown that the reversed operation of glutamate transporters when ATP levels fall accounts for most glutamate release induced by severe cerebral ischemia. Nitric oxide (NO) is formed after ischemia and causes ATP depletion. Our purpose is to test if NO release from inducible NO synthase (iNOS) after stroke may cause a delayed glutamate release due to ATP depletion that might underlie progression of the ischemic infarct. We have studied the effect of the highly selective inhibitor of iNOS activity 1400W on brain ATP levels, extracellular glutamate, and stroke outcome after transient focal cerebral ischemia in rats. Methods. To induce focal ischemia, the mid…

MaleBenzylaminesAmino Acid Transport System X-AGIschemiaAmidinesInfarctionDown-RegulationGlutamic AcidNitric Oxide Synthase Type IIL-argininePharmacologyNeuroprotectionNitric oxidelcsh:RC321-571chemistry.chemical_compoundAdenosine TriphosphateWestern blotmedicine.arteryStroke outcomeMedicineAnimalscardiovascular diseasesEnzyme InhibitorsRats Wistarlcsh:Neurosciences. Biological psychiatry. Neuropsychiatrymedicine.diagnostic_testbusiness.industryGlutamate receptorBrainInfarction Middle Cerebral ArteryNitric oxideCerebral Infarctionmedicine.diseaseNeuroprotectionRatsATPStrokeDisease Models AnimalNeuroprotective AgentsTreatment OutcomeNeurologychemistryCytoprotectionIschemic Attack TransientAnesthesiaMiddle cerebral arteryNitric Oxide SynthaseGlutamatebusinessNeurobiology of Disease
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Negative regulation of diacylglycerol kinase θ mediates adenosine-dependent hepatocyte preconditioning

2010

In liver ischemic preconditioning (IP), stimulation of adenosine A2a receptors (A2aR) prevents ischemia/reperfusion injury by promoting diacylglycerol-mediated activation of protein kinase C (PKC). By concerting diacylglycerol to phosphatidic acid, diacylglycerol kinases (DGKs) act as terminator of diacylglycerol signalling. This study investigates the role of DGK in the development of hepatocyte IP. DGK activity and cell viability were evaluated in isolated rat hepatocytes preconditioned by 10 min hypoxia followed by 10 min re-oxygenation or by the treatment with the A2aR agonist, CGS21680, and subsequently exposed to prolonged hypoxia. We observed that after IP or A2aR activation, a decre…

MaleDiacylglycerol Kinasemedicine.medical_specialtyAdenosineReceptor Adenosine A2Ap38 mitogen-activated protein kinasesBiologyQuinazolinonechemistry.chemical_compoundPiperidinecytoprotectionPiperidinesDownregulation and upregulationDiacylglycerol kinase thetaInternal medicinemedicineEnzyme Inhibitorhepatocytes adenosine RhoA hypoxia cytoprotectionAnimalsHepatocyteEnzyme InhibitorsRats WistarMolecular BiologyCells CulturedProtein kinase CQuinazolinonesDiacylglycerol kinaseCell DeathAnimalhypoxiaKinaseReceptors Purinergic P1RhoACell BiologyPhosphatidic acidAdenosineCell HypoxiaRatsCell biologyEndocrinologychemistryHepatocytesRatrhoA GTP-Binding Proteinmedicine.drugCell Death & Differentiation
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Molecular mechanisms of Id2 down-regulation in rat liver after acetaminophen overdose. Protection by N-acetyl-L-cysteine.

2010

Id2 is a pleiotropic protein whose function depends on its expression levels. Id2-deficient cells show increased cell death. This study explored the molecular mechanisms for the modulation of Id2 expression elicited by GSH and oxidative stress in the liver of acetaminophen (APAP)-intoxicated rats. APAP-overdose induced GSH depletion, Id2 promoter hypoacetylation, RNApol-II released and, therefore, Id2 down-regulation. Id2 expression depends on c-Myc binding to its promoter. APAP-overdose decreased c-Myc content and binding to Id2 promoter. Reduction of c-Myc was not accompanied by decreased c-myc mRNA, suggesting a mechanism dependent on protein stability. Administration of N-acetyl-cystein…

MaleProgrammed cell deathProteasome Endopeptidase ComplexGenes mycDown-RegulationBiologymedicine.disease_causeBiochemistrychemistry.chemical_compoundDownregulation and upregulationmedicineCoding regionAnimalsRats WistarPsychological repressionAcetaminophenInhibitor of Differentiation Protein 2Messenger RNAdigestive oral and skin physiologyGeneral MedicineGlutathioneAnalgesics Non-NarcoticMolecular biologyGlutathioneAcetaminophenAcetylcysteineRatsOxidative StresschemistryGene Expression RegulationLiverCytoprotectionDrug OverdoseOxidative stressmedicine.drugSignal TransductionFree radical research
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Metformin increases APP expression and processing via oxidative stress, mitochondrial dysfunction and NF-κB activation: Use of insulin to attenuate m…

2015

AbstractClinical and experimental biomedical studies have shown Type 2 diabetes mellitus (T2DM) to be a risk factor for the development of Alzheimer's disease (AD). This study demonstrates the effect of metformin, a therapeutic biguanide administered for T2DM therapy, on β-amyloid precursor protein (APP) metabolism in in vitro, ex vivo and in vivo models. Furthermore, the protective role of insulin against metformin is also demonstrated. In LAN5 neuroblastoma cells, metformin increases APP and presenilin levels, proteins involved in AD. Overexpression of APP and presenilin 1 (Pres 1) increases APP cleavage and intracellular accumulation of β-amyloid peptide (Aβ), which, in turn, promotes ag…

Maleendocrine system diseasesmedicine.medical_treatmentmedicine.disease_causeAntioxidantsNF-κBAmyloid beta-Protein PrecursorAspartic Acid EndopeptidasesInsulinBiguanideNF-kappa BBrainAlzheimer's diseaseMetforminMetforminMitochondriaProtein TransportAntioxidantmedicine.drugmetformin T2DM Alzheimer's diseaseAdultmedicine.medical_specialtyProgrammed cell deathmedicine.drug_classOxidative phosphorylationBiologyAntidiabetic drugModels BiologicalPresenilinInternal medicineCell Line Tumormental disordersmedicinePresenilin-1AnimalsHumansMolecular BiologyCell NucleusSettore MED/04 - Patologia GeneraleAmyloid beta-PeptidesInsulinAdenylate KinaseOxidative Stress Pathwaynutritional and metabolic diseasesCell BiologyHydrogen PeroxideMice Inbred C57BLEndocrinologyGene Expression RegulationCytoprotectionOxidative stressLeukocytes MononuclearAmyloid Precursor Protein SecretasesOxidative stressBiochimica et Biophysica Acta (BBA) - Molecular Cell Research
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