Search results for "Endoplasmic Reticulum Chaperone BiP"

showing 10 items of 30 documents

In vivoanalysis of the lumenal binding protein (BiP) reveals multiple functions of its ATPase domain

2007

International audience; The endoplasmic reticulum (ER) chaperone binding protein (BiP) binds exposed hydrophobic regions of misfolded proteins. Cycles of ATP hydrolysis and nucleotide exchange on the ATPase domain were shown to regulate the function of the ligand-binding domain in vitro. Here we show that ATPase mutants of BiP with defective ATP-hydrolysis (T46G) or ATP-binding (G235D) caused permanent association with a model ligand, but also interfered with the production of secretory, but not cytosolic, proteins in vivo. Furthermore, the negative effect of BiP(T46G) on secretory protein synthesis was rescued by increased levels of wild-type BiP, whereas the G235D mutation was dominant. U…

0106 biological sciencesgenetic structuresRecombinant Fusion ProteinsATPaseBlotting WesternGreen Fluorescent ProteinsPlant ScienceBINDING PROTEINEndoplasmic ReticulumModels Biological01 natural sciencesChromatography Affinity[SDV.GEN.GPL]Life Sciences [q-bio]/Genetics/Plants genetics03 medical and health sciencesAdenosine TriphosphateTobaccoPROTEIN FOLDINGGeneticsImmunoprecipitationEndoplasmic Reticulum Chaperone BiPHSP70Heat-Shock Proteins030304 developmental biologyCHAPERONEAdenosine Triphosphatases0303 health sciencesbiologyHydrolysisProtoplastsEndoplasmic reticulumBinding proteinCell BiologyPlants Genetically ModifiedLigand (biochemistry)Secretory proteinBiochemistryChaperone (protein)MutationChaperone bindingbiology.proteinATPASEElectrophoresis Polyacrylamide GelProtein foldingMolecular ChaperonesProtein BindingSignal Transduction010606 plant biology & botanyThe Plant Journal
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Homocysteine Induces Apoptosis of Human Umbilical Vein Endothelial Cells via Mitochondrial Dysfunction and Endoplasmic Reticulum Stress

2017

Homocysteine- (Hcy-) induced endothelial cell apoptosis has been suggested as a cause of Hcy-dependent vascular injury, while the proposed molecular pathways underlying this process are unclear. In this study, we investigated the adverse effects of Hcy on human umbilical vein endothelial cells (HUVEC) and the underlying mechanisms. Our results demonstrated that moderate-dose Hcy treatment induced HUVEC apoptosis in a time-dependent manner. Furthermore, prolonged Hcy treatment increased the expression of NOX4 and the production of intracellular ROS but decreased the ratio of Bcl-2/Bax and mitochondrial membrane potential (MMP), resulting in the leakage of cytochrome c and activation of caspa…

0301 basic medicineAgingArticle SubjectApoptosis030204 cardiovascular system & hematologyTransfectionBiochemistryUmbilical vein03 medical and health sciences0302 clinical medicineRisk FactorsHuman Umbilical Vein Endothelial CellsHumanslcsh:QH573-671Protein kinase AEndoplasmic Reticulum Chaperone BiPHomocysteinebiologylcsh:CytologyKinaseEndoplasmic reticulumCytochrome cCell BiologyGeneral MedicineEndoplasmic Reticulum StressMitochondriaCell biology030104 developmental biologyApoptosiscardiovascular systemUnfolded protein responsebiology.proteinPhosphorylationResearch ArticleOxidative Medicine and Cellular Longevity
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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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Oxidative and endoplasmic reticulum stress is impaired in leukocytes from metabolically unhealthy vs healthy obese individuals.

2017

BACKGROUND: Oxidative stress and inflammation are related to obesity, but the influence of metabolic disturbances on these parameters and their relationship with endoplasmic reticulum (ER) stress is unknown. Therefore, this study was performed to evaluate whether metabolic profile influences ER and oxidative stress in an obese population with/without comorbidities. SUBJECTS AND METHODS: A total of 113 obese patients were enrolled in the study; 29 were metabolically healthy (MHO), 53 were metabolically abnormal (MAO) and 31 had type 2 diabetes (MADO). We assessed metabolic parameters, proinflammatory cytokines (TNF alpha and IL-6), mitochondrial and total reactive oxygen species (ROS) produc…

0301 basic medicineMaleEndocrinology Diabetes and MetabolismMedicine (miscellaneous)Blood Pressuremedicine.disease_causeBody Mass Index0302 clinical medicineLeukocytesEndoplasmic Reticulum Chaperone BiPchemistry.chemical_classificationMetabolic SyndromeNutrition and DieteticsMiddle AgedEndoplasmic Reticulum StressCytokinesFemalemedicine.symptomOxidation-ReductionAdultmedicine.medical_specialtyBlotting Western030209 endocrinology & metabolismInflammationOxidative phosphorylation03 medical and health sciencesYoung AdultInsulin resistanceInternal medicinemedicineHumansObesityAgedDyslipidemiasInflammationReactive oxygen speciesObesity Metabolically Benignbusiness.industryEndoplasmic reticulummedicine.diseaseOxidative Stress030104 developmental biologyEndocrinologychemistryMetabolic syndromeInsulin ResistancebusinessReactive Oxygen SpeciesBody mass indexOxidative stressInternational journal of obesity (2005)
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Brief Report: Functional Interaction of Endoplasmic Reticulum Aminopeptidase 2 and HLA-B27 Activates the Unfolded Protein Response.

2017

Objective: The basic mechanisms underlying the pathogenesis of ankylosing spondylitis (AS) remain unresolved. We previously reported an association of the single-nucleotide polymorphism (SNP) rs2549782 in the endoplasmic reticulum aminopeptidase 2 gene (ERAP2) with AS. It is known that patients homozygous for the G allele (GG) of another ERAP2 SNP, rs2248374, lack expression of ERAP2 (ERAP2 null). The present study utilized this information to study the impact of ERAP2 deficiency on HLA–B27 expression in patients with AS, specifically focusing on the functional interaction of ERAP2 and HLA–B27 in peripheral blood mononuclear cells (PBMCs) from patients with AS and assessing the effects …

0301 basic medicineMaleX-Box Binding Protein 1Aminopeptidases0302 clinical medicineImmunology and AllergyRNA Small InterferingEndoplasmic Reticulum Chaperone BiPHLA-B27 AntigenHeat-Shock ProteinsAlleleBlottingReverse Transcriptase Polymerase Chain ReactionHeat-Shock ProteinSingle NucleotideMiddle AgedFlow CytometryCCAAT-Enhancer-Binding Protein3. Good healthUp-RegulationFemaleWesternHumanAnkylosingAdultAminopeptidaseMononuclearImmunologyBlotting WesternSingle-nucleotide polymorphismBiologyMajor histocompatibility complexSmall InterferingPolymorphism Single NucleotideAdult; Alleles; Aminopeptidases; Blotting Western; CCAAT-Enhancer-Binding Proteins; Cell Line; Female; Flow Cytometry; HLA-B27 Antigen; Heat-Shock Proteins; Humans; Leukocytes Mononuclear; Male; Middle Aged; Polymorphism Single Nucleotide; RNA Small Interfering; Reverse Transcriptase Polymerase Chain Reaction; Spondylitis Ankylosing; Unfolded Protein Response; Up-Regulation; X-Box Binding Protein 1; Immunology and Allergy; Rheumatology; ImmunologyCell Line03 medical and health sciencesDownregulation and upregulationRheumatologyHumansSpondylitis AnkylosingAllelePolymorphismAlleles030203 arthritis & rheumatologySpondylitiHLA-B27LeukocyteEndoplasmic reticulum aminopeptidase 2X-Box Binding Protein 1Molecular biologySettore MED/16 - Reumatologia030104 developmental biologyUnfolded protein responsebiology.proteinCCAAT-Enhancer-Binding ProteinsLeukocytes MononuclearUnfolded Protein ResponseRNAArthritisrheumatology (Hoboken, N.J.)
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Molecular chaperones in tumors of salivary glands.

2020

The salivary glands are key components of the mouth and play a central role in its physiology. Their importance may be appreciated considering their number, occurrence in pairs, and distribution in the mouth: two parotids, two submandibular, two sublingual, and many other small ones scattered throughout the mouth. They produce saliva, without which ingestion of non-liquid nutrients and speech would be practically impossible. Nevertheless, the physiology and pathology of salivary glands are poorly understood. For instance, tumors of salivary glands occur, and their incidence is on the rise, but their etiology and pathogenesis are virtually unknown, although some risk factors have been identi…

0301 basic medicineSalivaHistologyPhysiologyDifferential diagnosiBiologyBioinformaticsmedicine.disease_causePathogenesis03 medical and health sciencesstomatognathic systemmedicineHSPAnimalsHumansEndoplasmic Reticulum Chaperone BiPTumorsSalivary glandTumorigenesiChaperoning system030102 biochemistry & molecular biologySalivary glandCell BiologyGeneral MedicineSalivary Gland Neoplasms030104 developmental biologymedicine.anatomical_structureCell Transformation NeoplasticChaperone (protein)Etiologybiology.proteinMolecular chaperoneBiomarker (medicine)Disease SusceptibilityDifferential diagnosisCarcinogenesisMolecular ChaperonesJournal of molecular histology
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Effects of muscular dystrophy, exercise and blocking activin receptor IIB ligands on the unfolded protein response and oxidative stress

2016

Protein homeostasis in cells, proteostasis, is maintained through several integrated processes and pathways and its dysregulation may mediate pathology in many diseases including Duchenne muscular dystrophy (DMD). Oxidative stress, heat shock proteins, endoplasmic reticulum (ER) stress and its response, i.e. unfolded protein response (UPR), play key roles in proteostasis but their involvement in the pathology of DMD are largely unknown. Moreover, exercise and activin receptor IIB blocking are two strategies that may be beneficial to DMD muscle, but studies to examine their effects on these proteostasis pathways are lacking. Therefore, these pathways were examined in the muscle of mdx mice, …

0301 basic medicineX-Box Binding Protein 1Activin Receptors Type IIEukaryotic Initiation Factor-2MyostatinUPRBiochemistryMiceeIF-2 KinaseThioredoxinsSirtuin 1ENDOPLASMIC-RETICULUM STRESSDISULFIDE-ISOMERASEPhosphorylationta315Endoplasmic Reticulum Chaperone BiPHeat-Shock ProteinsIN-VIVOta3141Activin receptorMOUSE MODELER STRESSEndoplasmic Reticulum Stress3. Good healthmedicine.anatomical_structuremyostatinPRESERVES MUSCLE FUNCTIONER-stressSKELETAL-MUSCLEmdxSignal TransductionEXPRESSIONmedicine.medical_specialtyXBP1MDX MICEBiologyProtein Serine-Threonine Kinases03 medical and health sciencesPhysiology (medical)Internal medicineHeat shock proteinPhysical Conditioning AnimalEndoribonucleasesmedicineAnimalsHumansRNA MessengerMuscle SkeletalSkeletal muscleMyostatinGENEActivating Transcription Factor 6Immunoglobulin Fc FragmentsMuscular Dystrophy DuchenneDisease Models Animal030104 developmental biologyProteostasisEndocrinologyGene Expression RegulationUnfolded protein responsebiology.proteinMice Inbred mdxProteostasisUnfolded Protein Response3111 BiomedicineCarrier ProteinsACVR2B
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Metabolic syndrome enhances endoplasmic reticulum, oxidative stress and leukocyte–endothelium interactions in PCOS

2017

Polycystic ovary syndrome (PCOS) is associated with insulin resistance, which can lead to metabolic syndrome (MetS). Oxidative stress and leukocyte-endothelium interactions are related to PCOS. Our aim was to evaluate whether the presence of MetS in PCOS patients can influence endoplasmic reticulum (ER) and oxidative stress and leukocyte-endothelium interactions.This was a prospective controlled study conducted in an academic medical center. The study population consisted of 148 PCOS women (116 without/32 with MetS) and 112 control subjects (87 without / 25 with MetS). Metabolic parameters, reactive oxygen species (ROS) production, ER stress markers (GRP78, sXBP1, ATF6), leukocyte-endotheli…

0301 basic medicinemedicine.medical_specialtyXBP1Endocrinology Diabetes and Metabolism030209 endocrinology & metabolismBiologymedicine.disease_cause03 medical and health sciences0302 clinical medicineEndocrinologyInsulin resistanceInternal medicineCell AdhesionLeukocytesmedicineHumansProspective StudiesEndoplasmic Reticulum Chaperone BiPMetabolic SyndromeInterleukin-6ATF6Endoplasmic Reticulum StressIntercellular Adhesion Molecule-1medicine.diseasePolycystic ovaryOxidative Stress030104 developmental biologyEndocrinologyUnfolded protein responseHomeostatic model assessmentCytokinesFemaleEndothelium VascularMetabolic syndromeReactive Oxygen SpeciesCell Adhesion MoleculesOxidative stressPolycystic Ovary SyndromeMetabolism
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Disease-associated polymorphisms in ERAP1 do not alter endoplasmic reticulum stress in patients with ankylosing spondylitis

2014

The mechanism by which human leukocyte antigen B27 (HLA-B27) contributes to ankylosing spondylitis (AS) remains unclear. Genetic studies demonstrate that association with and interaction between polymorphisms of endoplasmic reticulum aminopeptidase 1 (ERAP1) and HLA-B27 influence the risk of AS. It has been hypothesised that ERAP1-mediated HLA-B27 misfolding increases endoplasmic reticulum (ER) stress, driving an interleukin (IL) 23-dependent, pro-inflammatory immune response. We tested the hypothesis that AS-risk ERAP1 variants increase ER-stress and concomitant pro-inflammatory cytokine production in HLA-B27(+) but not HLA-B27(-) AS patients or controls. Forty-nine AS cases and 22 healthy…

AdultMaleAnkylosing Spondylitismedicine.medical_treatmentImmunologyInflammationSingle-nucleotide polymorphismDiseaseBiologyERAP1AminopeptidasesPolymorphism Single NucleotideMinor Histocompatibility AntigensYoung AdultGene expressionGeneticsmedicineHumansSpondylitis AnkylosingERAP1 Ankylosing SpondylitisEndoplasmic Reticulum Chaperone BiPSpondylitisHLA-B27 AntigenGenetics (clinical)InflammationAnkylosing spondylitisEndoplasmic reticulumMiddle AgedEndoplasmic Reticulum Stressmedicine.diseaseCytokineImmunologyFemalemedicine.symptomGenes & Immunity
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Involvement of PAR-4 in Cannabinoid-Dependent Sensitization of Osteosarcoma Cells to TRAIL-Induced Apoptosis

2014

The synthetic cannabinoid WIN 55,212-2 is a potent cannabinoid receptor agonist with anticancer potential. Experiments were performed to determine the effects of WIN on proliferation, cell cycle distribution, and programmed cell death in human osteosarcoma MG63 and Saos-2 cells. Results show that WIN induced G2/M cell cycle arrest, which was associated with the induction of the main markers of ER stress (GRP78, CHOP and TRB3). In treated cells we also observed the conversion of the cytosolic form of the autophagosome marker LC3-I into LC3-II (the lipidated form located on the autophagosome membrane) and the enhanced incorporation of monodansylcadaverine and acridine orange, two markers of t…

AutophagosomeautophagyProgrammed cell deathCannabinoids ER stress autophagy TRAIL osteosarcoma cells GRP78/PAR-4 complex.Cannabinoid receptorMorpholinesCellApoptosisTRAILNaphthalenesBiologyGRP78/PAR-4 complex.Applied Microbiology and BiotechnologyTNF-Related Apoptosis-Inducing LigandCadaverineCell Line TumorSettore BIO/10 - BiochimicamedicineHumansRNA Small InterferingEndoplasmic Reticulum Chaperone BiPMolecular BiologyHeat-Shock ProteinsEcology Evolution Behavior and SystematicsCell ProliferationCannabinoid Receptor AgonistsOsteosarcomaCannabinoidsAutophagyCell Cycle Checkpointsosteosarcoma cellsCell BiologyCell cycleEndoplasmic Reticulum StressAcridine OrangeBenzoxazinesCell biologymedicine.anatomical_structureApoptosisAutophagosome membraneApoptosis Regulatory ProteinsER stressMicrotubule-Associated ProteinsResearch PaperDevelopmental Biology
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