Search results for " endoplasmic reticulum"

showing 10 items of 12 documents

The cytoprotective protein MANF promotes neuronal survival independently from its role as a GRP78 cofactor

2021

Mesencephalic astrocyte-derived neurotrophic factor (MANF) is an endoplasmic reticulum (ER)-stress-regulated protein exhibiting cytoprotective properties through a poorly understood mechanism in various in vitro and in vivo models of neuronal and non-neuronal damage. Although initially characterized as a secreted neurotrophic factor for midbrain dopamine neurons, MANF has recently gained more interest for its intracellular role in regulating the ER homeostasis, including serving as a cofactor of the chaperone glucose-regulated protein 78 (GRP78). We aimed for a better understanding of the neuroprotective mechanisms of MANF. Here we show for the first time that MANF promotes the survival of …

0301 basic medicineBiFC bimolecular fluorescence complementationMST microscale thermophoresisPDIA1 protein disulfide isomerase family A member 1ApoptosisNEUROTROPHIC FACTOR MANFEndoplasmic ReticulumBiochemistryprotein-protein interactionMiceBimolecular fluorescence complementationUPR unfolded protein responseENDOPLASMIC-RETICULUM STRESSMesencephalonNeurotrophic factorsInsulin-Secreting CellsProtein Interaction MappingBINDINGCOMPREHENSIVE RESOURCEATF6unfolded protein response (UPR)PDIA6 protein disulfide isomerase family A member 6PPIs protein-protein interactionsEndoplasmic Reticulum Chaperone BiPHeat-Shock ProteinsNPTN neuroplastinbiologyChemistryapoptosisunfolded protein responsedopamine neurons3. Good healthCell biologyGDNF glial cell line–derived neurotrophic factorIRE1-ALPHASBD substrate-binding domainendoplasmic reticulum stressMANF mesencephalic astrocyte-derived neurotrophic factorTm tunicamycinneuroprotectionResearch ArticleProtein BindingSignal TransductionGRP78Protein Disulfide-Isomerase FamilyCell SurvivalTH tyrosine hydroxylasePrimary Cell CultureSCG superior cervical ganglionProtein Disulfide-IsomerasesIRE1 inositol-requiring enzyme 1ER-STRESSER endoplasmic reticulum03 medical and health sciencesohjelmoitunut solukuolemaC-MANF C-terminal domain of MANFCSPs chemical shift perturbationsAnimalsHumansHSP70 Heat-Shock ProteinsNerve Growth FactorsNBD nucleotide-binding domainNMR nuclear magnetic resonanceMolecular Biology030102 biochemistry & molecular biologyBIPATF6Dopaminergic NeuronsGene Expression ProfilingBinding proteinneuronal cell deathDISSOCIATIONCell BiologyNEI nucleotide exchange inhibitorEmbryo MammalianadenosiinitrifosfaattiATPhermosolutmesencephalic astrocyte-derived neurotrophic factorprotein–protein interactionPERK protein kinase RNA-like ER kinaseHEK293 Cells030104 developmental biologyGene Expression RegulationChaperone (protein)Tg thapsigarginbiology.proteinUnfolded protein responseAP-MS affinity purification mass spectrometry1182 Biochemistry cell and molecular biologyGFP-SH SH-tagged GFPendoplasmic reticulum stress (ER stress)DA dopaminemesencephalic astrocyte-derived neurotrophic factor (MANF)proteiinitNeuroplastin

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Targeting COPZ1 non-oncogene addiction counteracts the viability of thyroid tumor cells

2017

Abstract Thyroid carcinoma is generally associated with good prognosis, but no effective treatments are currently available for aggressive forms not cured by standard therapy. To find novel therapeutic targets for this tumor type, we had previously performed a siRNA-based functional screening to identify genes essential for sustaining the oncogenic phenotype of thyroid tumor cells, but not required to the same extent for the viability of normal cells (non-oncogene addiction paradigm). Among those, we found the coatomer protein complex ζ1 (COPZ1) gene, which is involved in intracellular traffic, autophagy and lipid homeostasis. In this paper, we investigated the mechanisms through which COPZ…

0301 basic medicineCancer ResearchTime FactorsCOPZ1ApoptosisCOPZ1Thyroid cancerThyroid NeoplasmThyroidRNAi TherapeuticCell death; COPZ1; Non-oncogene addiction; Thyroid carcinoma; Animals; Apoptosis; Autophagy; Cell Line Tumor; Cell Survival; Coatomer Protein; Endoplasmic Reticulum Stress; Female; Gene Expression Regulation Neoplastic; Humans; Mice Nude; RNA Interference; Signal Transduction; Thyroid Neoplasms; Time Factors; Transfection; Tumor Burden; Unfolded Protein Response; Xenograft Model Antitumor Assays; RNAi Therapeutics; Oncology; Cancer ResearchEndoplasmic Reticulum StressOncogene AddictionTumor BurdenGene Expression Regulation Neoplasticmedicine.anatomical_structureOncologyFemaleRNA InterferenceNon-oncogene addictionHumanSignal TransductionCell deathProgrammed cell deathXenograft Model Antitumor AssayTime FactorCell SurvivalMice NudeBiologyTransfectionCoatomer ProteinThyroid carcinomaThyroid carcinoma03 medical and health sciencesCell Line TumorAutophagymedicineAnimalsHumansThyroid NeoplasmsEndoplasmic Reticulum StreAnimalAutophagyApoptosimedicine.diseaseXenograft Model Antitumor AssaysRNAi Therapeutics030104 developmental biologyImmunologyUnfolded Protein ResponseCancer researchUnfolded protein response

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Protein misfolding, amyotrophic lateral sclerosis and guanabenz: Protocol for a phase II RCT with futility design (ProMISe trial)

2017

IntroductionRecent studies suggest that endoplasmic reticulum stress may play a critical role in the pathogenesis of amyotrophic lateral sclerosis (ALS) through an altered regulation of the proteostasis, the cellular pathway-balancing protein synthesis and degradation. A key mechanism is thought to be the dephosphorylation of eIF2α, a factor involved in the initiation of protein translation. Guanabenz is an alpha-2-adrenergic receptor agonist safely used in past to treat mild hypertension and is now an orphan drug. A pharmacological action recently discovered is its ability to modulate the synthesis of proteins by the activation of translational factors preventing misfolded protein accumula…

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Insulin Dissociates the Effects of Liver X Receptor on Lipogenesis, Endoplasmic Reticulum Stress, and Inflammation

2016

IF 4.258; International audience; Diabetes is characterized by increased lipogenesis as well as increased endoplasmic reticulum (ER) stress and inflammation. The nuclear hormone receptor liver X receptor (LXR) is induced by insulin and is a key regulator of lipid metabolism. It promotes lipogenesis and cholesterol efflux, but suppresses endoplasmic reticulum stress and inflammation. The goal of these studies was to dissect the effects of insulin on LXR action. We used antisense oligonucleotides to knock down Lxr alpha in mice with hepatocytespecific deletion of the insulin receptor and their controls. We found, surprisingly, that knock-out of the insulin receptor and knockdown of Lxr alpha …

0301 basic medicinemedicine.medical_treatmentLipid-metabolismResistanceBiochemistryHepatitisMESH: HepatitisMESH: Endoplasmic Reticulum Stresspolycyclic compoundsInsulinGene-expressionPhospholipidsLiver X ReceptorsMice KnockoutbiologyMESH : Gene Expression RegulationFatty-acid synthesisfood and beveragesEndoplasmic Reticulum StressOrphan Nuclear ReceptorsCultured-cellsLipidsMESH: Gene Expression RegulationMESH : Endoplasmic Reticulum StressMessenger-rnaLiverMESH: Orphan Nuclear ReceptorsGene Knockdown TechniquesLipogenesisFemalelipids (amino acids peptides and proteins)Signal Transductionliver X receptormedicine.medical_specialtyLxr-alphaMice Transgenicdigestive systemPhospholipid transfer proteinGene Expression Regulation Enzymologic03 medical and health sciencesInsulin resistanceMESH : HepatitisLysophosphatidylcholine acyltransferaseInternal medicinemedicineAnimals[SDV.BBM]Life Sciences [q-bio]/Biochemistry Molecular BiologyLiver X receptorMolecular Biology[ SDV.BBM ] Life Sciences [q-bio]/Biochemistry Molecular BiologyCrosses GeneticLipogenesisEndoplasmic reticulumInsulinElement-binding protein-1cMESH : LiverCell Biologymedicine.diseaseMESH : Orphan Nuclear ReceptorsReceptor InsulinMice Inbred C57BLInsulin receptor030104 developmental biologyEndocrinologyDiabetes Mellitus Type 2Gene Expression RegulationNuclear receptorbiology.proteinUnfolded protein responseInsulin ResistanceMESH: Liver

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Endoplasmic reticulum stress is involved in response of human laryngeal carcinoma cells to carboplatin but is absent in carboplatin resistant cells

2013

The major obstacle of successful tumor treatment with carboplatin (CBP) is the development of drug resistance. In the present study, we found that following treatment with CBP the amount of platinum which enters the human laryngeal carcinoma (HEp2)-derived CBP- resistant (7T) cells is reduced relative to the parental HEp2. As a consequence, the formation of reactive oxidative species (ROS) is reduced, the induction of endoplasmic reticulum (ER) stress is diminished, the amount of inter- and intrastrand cross-links is lower, and the induction of apoptosis is depressed. In HEp2 cells, ROS scavenger tempol, inhibitor of ER stress salubrinal, as well as gene silencing of ER stress marker CCAAT/…

Celllcsh:MedicineApoptosisCarboplatinSalubrinalapoptosis; carboplatin; drug resistance; endoplasmic reticulum stress; reactive oxidative species; tumor cellschemistry.chemical_compound0302 clinical medicineBlotting Southwesternlcsh:Science0303 health sciencesMultidisciplinaryThioureaGeologyEndoplasmic Reticulum Stress3. Good healthmedicine.anatomical_structure030220 oncology & carcinogenesisSignal transductionSignal TransductionResearch ArticleProgrammed cell deathCell SurvivalBlotting WesternBiologyReal-Time Polymerase Chain ReactionCyclic N-Oxides03 medical and health sciencesCell Line TumormedicineHumansGene SilencingLaryngeal NeoplasmsBiology030304 developmental biologyDNA PrimersPlatinumEndoplasmic reticulumlcsh:RCarcinomaMolecular biologychemistryCell cultureApoptosisCinnamatesDrug Resistance NeoplasmUnfolded protein responseCancer researchlcsh:QSpin LabelsReactive Oxygen Species

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Lipase maturation factor 1 is required for endothelial lipase activity

2011

Lipase maturation factor 1 (Lmf1) is an endoplasmic reticulum (ER) membrane protein involved in the posttranslational folding and/or assembly of lipoprotein lipase (LPL) and hepatic lipase (HL) into active enzymes. Mutations in Lmf1 are associated with diminished LPL and HL activities ("combined lipase deficiency") and result in severe hypertriglyceridemia in mice as well as in human subjects. Here, we investigate whether endothelial lipase (EL) also requires Lmf1 to attain enzymatic activity. We demonstrate that cells harboring a (cld) loss-of-function mutation in the Lmf1 gene are unable to generate active EL, but they regain this capacity after reconstitution with the Lmf1 wild type. Fur…

Endothelial lipaseSettore MED/09 - Medicina InternaCombined Lipase DeficiencyQD415-436PhospholipaseTransfectionBiochemistryChromatography Affinityphospholipasescombined lipase deﬁciencyMiceEndocrinologyAnimalsHumansWithdrawals/RetractionsLipaseResearch ArticlesHypertriglyceridemiaLipoprotein lipasecombined lipase deﬁciency; endoplasmic reticulum; hepatic; metabolism; phospholipasesbiologyEndoplasmic reticulumWild typeMembrane ProteinsLipaseCell BiologyFibroblastsMolecular biologyLipoprotein Lipaseendoplasmic reticulumElectroporationHEK293 CellsMutationbiology.proteinHepatic lipasehepaticmetabolismPlasmidscombined lipase deficiencyJournal of Lipid Research

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Consensus guidelines for the detection of immunogenic cell death

2014

Apoptotic cells have long been considered as intrinsically tolerogenic or unable to elicit immune responses specific for dead cell-associated antigens. However, multiple stimuli can trigger a functionally peculiar type of apoptotic demise that does not go unnoticed by the adaptive arm of the immune system, which we named "immunogenic cell death" (ICD). ICD is preceded or accompanied by the emission of a series of immunostimulatory damage-associated molecular patterns (DAMPs) in a precise spatiotemporal configuration. Several anticancer agents that have been successfully employed in the clinic for decades, including various chemotherapeutics and radiotherapy, can elicit ICD. Moreover, defect…

HSV-1 herpes simplex virus type IΔψm mitochondrial transmembrane potentialmedicine.medical_treatmentDAMP damage-associated molecular patterndetectionFLT3LG fms-related tyrosine kinase 3 ligandReviewmember 3calreticulinEukaryotic translation initiation factor 2ARFP red fluorescent protein0302 clinical medicineMOMP mitochondrial outer membrane permeabilizationImmunology and AllergyGFP green fluorescent proteinHMGB10303 health scienceseducation.field_of_studyToll-like receptorBAK1 BCL2-antagonist/killer 1H2B histone 2Bendoplasmic reticulum stre3. Good healthBAX BCL2-associated X proteinXBP1 X-box binding protein 1cell deathOncologyPDIA3 protein disulfide isomerase family A030220 oncology & carcinogenesisendoplasmic reticulum stressImmunogenic cell deathHSP heat shock proteinimmunotherapyTLR Toll-like receptorautophagyATF6 activating transcription factor 6ImmunologyICD immunogenic cell deathEIF2A eukaryotic translation initiation factor 2AGuidelinesBiologyBCL2 B-cell CLL/lymphoma 2 proteinER endoplasmic reticulumPI propidium iodideATP release03 medical and health sciencesImmune systemimmunogenicmedicineIFN interferonAntigen-presenting celleducation030304 developmental biologyCALR calreticulinDamage-associated molecular patternImmunotherapyCTL cytotoxic T lymphocyteHMGB1 high mobility group box 1IL interleukinG3BP1 GTPase activating protein (SH3 domain) binding protein 1APC antigen-presenting cellCancer cellImmunologyDiOC6(3) 33′-dihexyloxacarbocyanine iodideDAPI 4′6-diamidino-2-phenylindoleOncoImmunology

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Castration-Induced Downregulation of SPARC in Stromal Cells Drives Neuroendocrine Differentiation of Prostate Cancer.

2021

Abstract Fatal neuroendocrine differentiation (NED) of castration-resistant prostate cancer is a recurrent mechanism of resistance to androgen deprivation therapies (ADT) and antiandrogen receptor pathway inhibitors (ARPI) in patients. The design of effective therapies for neuroendocrine prostate cancer (NEPC) is complicated by limited knowledge of the molecular mechanisms governing NED. The paucity of acquired genomic alterations and the deregulation of epigenetic and transcription factors suggest a potential contribution from the microenvironment. In this context, whether ADT/ARPI induces stromal cells to release NED-promoting molecules and the underlying molecular networks are unestablis…

MaleCancer ResearchStromal cellAnimals Biomarkers Tumor Cell Differentiation Cell Line Tumor Coculture Techniques Endoplasmic Reticulum Chaperone BiP Epigenesis Genetic Gene Expression Regulation Neoplastic Humans Male Mice Mice Inbred C57BL Neuroendocrine Cells Osteonectin Prostatic Neoplasms Stromal Cells Transgenes Tumor Microenvironment Down-RegulationDown-RegulationContext (language use)Settore MED/08 - Anatomia PatologicaNeuroendocrine differentiationEpigenesis GeneticProstate cancerMiceStromaDownregulation and upregulationNeuroendocrine CellsCell Line TumormedicineBiomarkers TumorTumor MicroenvironmentSettore MED/05 - Patologia ClinicaAnimalsHumansOsteonectinEpigeneticsTransgenesEndoplasmic Reticulum Chaperone BiPbusiness.industryMatricellular proteinProstatic NeoplasmsCell Differentiationmedicine.diseaseCoculture TechniquesGene Expression Regulation NeoplasticMice Inbred C57BLOncologyCancer researchStromal CellsbusinessCancer research

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Redox signaling in acute pancreatitis

2015

Acute pancreatitis is an inflammatory process of the pancreatic gland that eventually may lead to a severe systemic inflammatory response. A key event in pancreatic damage is the intracellular activation of NF-κB and zymogens, involving also calcium, cathepsins, pH disorders, autophagy, and cell death, particularly necrosis. This review focuses on the new role of redox signaling in acute pancreatitis. Oxidative stress and redox status are involved in the onset of acute pancreatitis and also in the development of the systemic inflammatory response, being glutathione depletion, xanthine oxidase activation, and thiol oxidation in proteins critical features of the disease in the pancreas. On th…

NecrosisGSH reduced glutathioneSTAT3 signal transducer and activator of transcription 3ERK extracellular signal-regulated kinasesClinical BiochemistryCCK cholecystokininTRAFs TNF receptor associated factorsReview ArticleIκB kinasePharmacologymedicine.disease_causeBiochemistrySHP small heterodimer partnerSTIM1 stromal interaction molecule 1chemistry.chemical_compoundHATs histone acetyltransferasesMedicineASK1GCL glutamate cysteine ligaseTNF-α tumor necrosis factor alphaIKK IκB kinaseNOS nitric oxide synthaseAcute inflammationHIF hypoxia inducible factorlcsh:QH301-705.5NF-κB nuclear factor kappa BDAMPs damage-associated molecular pattern moleculeslcsh:R5-920biologyGSSG oxidized glutathioneNF-kappa BNLRs nucleotide-binding oligomerization domain (NOD) like receptorsTRADD tumor necrosis factor receptor type 1-associated DEATH domain proteinTRPC3 transient receptor potential channel 3VEGF vascular endothelial growth factorGlutathioneTNFR tumor necrosis factor receptorHMGB1 high-mobility group Box 1 proteinIP3R inositol 145-trisphosphate receptor type 3VCAM-1 Vascular Cell adhesion protein 1Acute DiseaseJNK c-Jun N-terminal kinaseAcute pancreatitisTLRs toll-like receptorsmedicine.symptomlcsh:Medicine (General)Oxidation-ReductionAP-1 activator protein-1Signal TransductionmRNA messenger ribonucleic acidHMGB1ASC apoptosis-associated speck-like protein containing a carboxy-terminal CARDRNS reactive nitrogen speciesPTPs protein tyrosine phosphatasesROS reactive oxygen speciesNADH nicotinamide adenine dinucleotidepHe extracellular pHFAEE fatty acid ethyl estersAP acute pancreatitisHumansXanthine oxidaseCBP CREB-binding proteinRyR endoplasmic reticulum membrane ryanodine receptorsMDA malondialdehydeNO nitric oxideXO xanthine oxidaseASK1 apoptosis signal-regulating kinase-1business.industryOrganic ChemistryAutophagyNADPH nicotinamide adenine dinucleotide phosphateHDACs histone deacetylasesmedicine.diseaseCARS compensatory anti-inflammatory response syndromeXDH xanthine dehydrogenaseIL interleukinIκB inhibitor of kappa BAcute pancreatitisETC Electron transport chainPancreatitisMKPs MAPK phosphatasesSAP severe acute pancreatitischemistrylcsh:Biology (General)DTT dithiothreitolOxidative stressNAC N-acetyl cysteineImmunologybiology.proteinCalciumLysosomesReactive Oxygen SpeciesbusinessMAPK mitogen-activated protein kinaseOxidative stressERCP endoscopic retrograde cholangiopancreatographyRedox Biology

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Increased serum miR-193a-5p during non-alcoholic fatty liver disease progression: Diagnostic and mechanistic relevance

2022

Background & Aims Serum microRNA (miRNA) levels are known to change in non-alcoholic fatty liver disease (NAFLD) and may serve as useful biomarkers. This study aimed to profile miRNAs comprehensively at all NAFLD stages. Methods We profiled 2,083 serum miRNAs in a discovery cohort (183 cases with NAFLD representing the complete NAFLD spectrum and 10 population controls). miRNA libraries generated by HTG EdgeSeq were sequenced by Illumina NextSeq. Selected serum miRNAs were profiled in 372 additional cases with NAFLD and 15 population controls by quantitative reverse transcriptase PCR. Results Levels of 275 miRNAs differed between cases and population controls. Fewer differences were seen wi…

SCORING SYSTEMCPM counts per millionAUROC area under the receiver operating characteristicRC799-869AST aspartate aminotransferaseMicroRNA; Non-alcoholic fatty liver disease; Biomarker; SequencingTGF-β transforming growth factor-betaGastroenterologySTEATOHEPATITISLiver disease0302 clinical medicineFibrosismiRNA microRNAlogFC log2 fold changeFIBROSISImmunology and AllergySequencing0303 health scienceseducation.field_of_studyNAS NAFLD activity scoremedicine.diagnostic_testFatty liverGastroenterologyGTEx Genotype-Tissue ExpressionMicroRNADiseases of the digestive system. Gastroenterology3. Good healthReal-time polymerase chain reactionBiomarker MicroRNA Non-alcoholic fatty liver disease SequencingLiver biopsyACIDBiomarker (medicine)030211 gastroenterology & hepatologyLife Sciences & BiomedicineResearch ArticleEXPRESSIONmedicine.medical_specialtyNAFLD non-alcoholic fatty liver diseaseNASH non-alcoholic steatohepatitisPopulationGastroenterology and HepatologySAF steatosis–activity–fibrosisVALIDATIONER endoplasmic reticulum03 medical and health sciencescDNA complementary DNAInternal medicineALT alanine aminotransferaseGastroenterologiInternal MedicinemedicineNAFL non-alcoholic fatty liverALGORITHMFIB-4 fibrosis-4education030304 developmental biologyPCA principal component analysisScience & TechnologyGastroenterology & HepatologyHepatologybusiness.industryBiomarkerFC fold changemedicine.diseaseBiomarker; MicroRNA; Non-alcoholic fatty liver disease; Sequencingdigestive system diseasesFLIP fatty liver inhibition of progressionCt cycle thresholdSteatosisqPCR quantitative PCRbusinessNon-alcoholic fatty liver disease

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