Search results for " Member 2"

showing 10 items of 39 documents

Identification of sequences in the human peptide transporter subunit TAP1 required for transporter associated with antigen processing (TAP) function

2001

The heterodimeric peptide transporter associated with antigen processing (TAP) consisting of the subunits TAP1 and TAP2 mediates the transport of cytosolic peptides into the lumen of the endoplasmic reticulum (ER). In order to accurately define domains required for peptide transporter function, a molecular approach based on the construction of a panel of human TAP1 mutants and their expression in TAP1(-/-) cells was employed. The characteristics and biological activity of the various TAP1 mutants were determined, and compared to that of wild-type TAP1 and TAP1(-/-) control cells. All mutant TAP1 proteins were localized in the ER and were capable of forming complexes with the TAP2 subunit. H…

Genetic VectorsImmunologyAntigen presentationBiological Transport ActiveEpitopes T-LymphocyteTransfectionMajor histocompatibility complexMiceAntigenATP Binding Cassette Transporter Subfamily B Member 3MHC class ITumor Cells CulturedAnimalsHumansLymphocytic choriomeningitis virusImmunology and AllergyAmino Acid SequenceATP Binding Cassette Transporter Subfamily B Member 2Sequence DeletionMice KnockoutAntigen PresentationbiologyAntigen processingHistocompatibility Antigens Class IGeneral MedicineTransporter associated with antigen processingMHC restrictionCytotoxicity Tests ImmunologicMolecular biologyPeptide FragmentsCell biologyMice Inbred C57BLPeptide transportMutagenesis Site-Directedbiology.proteinATP-Binding Cassette TransportersDimerizationT-Lymphocytes CytotoxicInternational Immunology
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Cytotoxicity of the bisphenolic honokiol from Magnolia officinalis against multiple drug-resistant tumor cells as determined by pharmacogenomics and …

2014

A main problem in oncology is the development of drug-resistance. Some plant-derived lignans are established in cancer therapy, e.g. the semisynthetic epipodophyllotoxins etoposide and teniposide. Their activity is, unfortunately, hampered by the ATP-binding cassette (ABC) efflux transporter, P-glycoprotein. Here, we investigated the bisphenolic honokiol derived from Magnolia officinalis. P-glycoprotein-overexpressing CEM/ADR5000 cells were not cross-resistant to honokiol, but MDA-MB-231 BRCP cells transfected with another ABC-transporter, BCRP, revealed 3-fold resistance. Further drug resistance mechanisms analyzed study was the tumor suppressor TP53 and the epidermal growth factor recepto…

HonokiolATP Binding Cassette Transporter Subfamily BPharmaceutical ScienceBiologyPharmacologyLignanschemistry.chemical_compoundGefitinibCell Line TumorDrug DiscoverymedicineATP Binding Cassette Transporter Subfamily G Member 2HumansEpidermal growth factor receptorCytotoxicityPI3K/AKT/mTOR pathwayOligonucleotide Array Sequence AnalysisPharmacologyBiphenyl CompoundsTransfectionbiology.organism_classificationAntineoplastic Agents PhytogenicDrug Resistance MultipleNeoplasm ProteinsErbB ReceptorsMolecular Docking SimulationMagnolia officinalisComplementary and alternative medicinechemistryDrug Resistance NeoplasmMagnoliaPharmacogeneticsbiology.proteinMolecular MedicineATP-Binding Cassette TransportersErlotinibTumor Suppressor Protein p53Transcriptomemedicine.drugSignal TransductionPhytomedicine : international journal of phytotherapy and phytopharmacology
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TAP-polymorphisms in juvenile onset psoriasis and psoriatic arthritis.

1996

Abstract Juvenile onset psoriasis is strongly associated with the HLA-class I genes Cw6 and B57 whereas patients with psoriatic arthritis show an increased frequency of HLA-B27. It is unclear whether additional major histocompatibility genes also increase disease susceptibility. The TAP genes (transporter associated with antigen processing) encode two membrane-spanning proteins that translocate antigenic peptides from the cytoplasm into the endoplasmic reticulum. Comparison of 60 patients with juvenile onset psoriasis, 63 psoriatic arthritis patients, and 101 caucasoid controls revealed an increase of the TAP1 ∗ 0101 allele in the psoriasis group, that could not be explained by linkage to o…

ImmunologyLinkage DisequilibriumMajor Histocompatibility ComplexPsoriatic arthritisATP Binding Cassette Transporter Subfamily B Member 3PsoriasismedicineImmunology and AllergyHumansPsoriasisAlleleATP Binding Cassette Transporter Subfamily B Member 2GenePolymorphism Geneticbiologybusiness.industryEndoplasmic reticulumArthritis PsoriaticHistocompatibility Antigens Class IGeneral MedicineTransporter associated with antigen processingHLA-DR Antigensmedicine.diseaseImmunologybiology.proteinTAP2ATP-Binding Cassette TransportersTAP1businessHuman immunology
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Early impairment of epigenetic pattern in neurodegeneration: Additional mechanisms behind pyrethroid toxicity

2019

Abstract Permethrin is a synthetic pyrethroid extensively used as anti-woodworm agent and for indoor and outdoor pest control. The main route of human exposure is through fruit, vegetable and milk intake. Low dosage exposure to permethrin during neonatal brain development (from postnatal day 6 to postnatal day 21) leads to dopamine decrease in rat striatum nucleus, oxidative stress and behavioural changes linked to the development of Parkinson's like neurodegeneration later in life. The aim of this study was to evaluate the expression of genes involved in the dopaminergic pathway and epigenetic regulatory mechanisms in adolescent rats treated with permethrin during neonatal brain developmen…

Male0301 basic medicineAgingDopamineStriatumPharmacologyBiologyBiochemistryEpigenesis GeneticMECP203 medical and health sciences0302 clinical medicineEndocrinologyDopamineNuclear Receptor Subfamily 4 Group A Member 2parasitic diseasesGeneticsmedicineAnimalsEpigeneticsRats WistarPromoter Regions GeneticDNA Modification MethylasesMolecular BiologyPermethrinOrphan receptorDopaminergicNeurodegenerationNeurodegenerative DiseasesCell BiologyDNA Methylationmedicine.diseaseCorpus StriatumRatsMolecular Docking Simulation030104 developmental biologyAnimals Newbornalpha-SynucleinProtein Multimerization030217 neurology & neurosurgeryPermethrinmedicine.drugExperimental Gerontology
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Mast cell targeting hampers prostate adenocarcinoma development but promotes the occurrence of highly malignant neuroendocrine cancers

2011

Abstract Mast cells (MC) are c-Kit–expressing cells, best known for their primary involvement in allergic reactions, but recently reappraised as important players in either cancer promotion or inhibition. Here, we assessed the role of MCs in prostate tumor development. In prostate tumors from both tumor-prone transgenic adenocarcinoma of the mouse prostate (TRAMP) mice and human patients, MCs are specifically enriched and degranulated in areas of well-differentiated (WD) adenocarcinoma but not around poorly differentiated (PD) foci that coexist in the same tumors. We derived novel TRAMP tumor cell lines, representative of WD and PD variants, and through pharmacologic stabilization or geneti…

MaleOncologyCancer Researchmedicine.medical_specialtyEpithelial-Mesenchymal TransitionMice TransgenicAdenocarcinomaBiologymedicine.disease_causeCell DegranulationMiceProstate cancerProstateCell Line TumorInternal medicineTumor MicroenvironmentmedicineMast CellAnimalsHumansMast CellsReceptors Tumor Necrosis Factor Member 25Tumor microenvironmentAdenocarcinoma; Animals; Carcinoma Neuroendocrine; Cell Degranulation; Cell Line Tumor; Disease Progression; Epithelial-Mesenchymal Transition; Humans; Male; Mast Cells; Matrix Metalloproteinase 9; Mice; Mice Inbred C57BL; Mice Transgenic; Prostatic Neoplasms; Proto-Oncogene Proteins c-kit; Receptors Tumor Necrosis Factor Member 25; Tumor Microenvironment; Cancer Research; OncologyAnimalProstatic NeoplasmsCancermedicine.diseasehumanitiesCarcinoma NeuroendocrineMice Inbred C57BLProto-Oncogene Proteins c-kitmedicine.anatomical_structureMatrix Metalloproteinase 9OncologyTumor progressionProstatic NeoplasmDisease ProgressionAdenocarcinomaCarcinogenesisHumanTramp
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Changes in the expression of cation-Cl- cotransporters, NKCC1 and KCC2, during cortical malformation induced by neonatal freeze-lesion.

2007

Focal cortical malformations comprise a heterogeneous group of disturbances in brain development, often associated with intractable epilepsy. A focal freeze-lesion of cerebral cortex in newborn rat produces a cortical malformation that resembles human polymicrogyria, clinical conditions that results from abnormal neuronal migration. The change in GABAergic functions that occurs during early brain development is induced by an alteration in Cl(-) homeostasis and plays important roles in neocortical development by modulating such events as laminar organization and synaptogenesis. We therefore investigated the relationship between pathogenesis of polymicrogyria and ontogeny of Cl(-) homeostasis…

MaleSodium-Potassium-Chloride SymportersSynaptogenesisDown-RegulationBiologyNervous System MalformationsLaminar organizationChloridesCell MovementChloride ChannelsCortex (anatomy)Parietal LobeGlial Fibrillary Acidic ProteinmedicinePolymicrogyriaAnimalsSolute Carrier Family 12 Member 2RNA MessengerRats Wistargamma-Aminobutyric AcidCerebral CortexSymportersGeneral NeuroscienceColocalizationCell DifferentiationGeneral Medicinemedicine.diseaseDenervationImmunohistochemistryMicrogyrusRatsUp-RegulationCold Temperaturemedicine.anatomical_structureNeuronal migration disorderBromodeoxyuridineCerebral cortexPhosphopyruvate HydrataseNeuroscienceBiomarkersNeuroscience research
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Functional cysteine-less subunits of the transporter associated with antigen processing (TAP1 and TAP2) by de novo gene assembly

2002

AbstractWithin the adaptive immune system the transporter associated with antigen processing (TAP) plays a pivotal role in loading of peptides onto major histocompatibility (MHC) class I molecules. As a central tool to investigate the structure and function of the TAP complex, we created cysteine-less human TAP subunits by de novo gene synthesis, replacing all 19 cysteines in TAP1 and TAP2. After expression in TAP-deficient human fibroblasts, cysteine-less TAP1 and TAP2 are functional with respect to adenosine triphosphate (ATP)-dependent peptide transport and inhibition by ICP47 from herpes simplex virus. Cysteine-less TAP1 and TAP2 restore maturation and intracellular trafficking of MHC c…

Models MolecularBiophysicsBiological Transport ActiveBiologyMajor histocompatibility complexTransfectionBiochemistryCell Linechemistry.chemical_compoundAdenosine TriphosphateStructural BiologyATP Binding Cassette Transporter Subfamily B Member 3Cysteine-scanning mutagenesisMHC class IGeneticsHumansCysteineATP Binding Cassette Transporter Subfamily B Member 2Molecular BiologyAntigen PresentationAntigen processingHistocompatibility Antigens Class ICell BiologyTransporter associated with antigen processingMolecular biologyRecombinant ProteinsCell biologyProtein SubunitschemistryAmino Acid SubstitutionAntigen processingPeptide transportMembrane proteinbiology.proteinAdenosine triphosphate-binding cassette transporterTAP2ATP-Binding Cassette TransportersTAP1Adenosine triphosphateFEBS Letters
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Multiple Pluripotent Stem Cell Markers in Human Anaplastic Thyroid Cancer: The Putative Upstream Role of SOX2

2013

Anaplastic thyroid carcinoma (ATC) is a rare and aggressive endocrine tumor with highly undifferentiated morphology. It has been suggested that cancer stem cells (CSCs) might play a central role in ATC. The objectives of this study were (i) to characterize CSCs from ex vivo ATC specimens by investigating the expression of several pluripotent stem cell markers, and (ii) to evaluate in vitro drug resistance modifications after specific CSC transcription factor switch-off.In ex vivo experiments, eight formalin-fixed, paraffin-embedded ATC specimens were analyzed by reverse-transcription and real-time quantitative PCR and immunohistochemistry. In in vitro experiments using ATC SW1736 cells, the…

Pluripotent Stem Cellscongenital hereditary and neonatal diseases and abnormalitiesEndocrinology Diabetes and MetabolismDown-RegulationBiologyThyroid Carcinoma AnaplasticAnaplastic thyroid cancer cancer stem cell SOX-2Settore MED/13 - EndocrinologiaThyroid carcinomaKruppel-Like Factor 4EndocrinologySOX2Cancer stem cellCell Line TumormedicineATP Binding Cassette Transporter Subfamily G Member 2HumansNeoplasmThyroid NeoplasmsAnaplastic thyroid cancerInduced pluripotent stem cellHomeodomain ProteinsSOXB1 Transcription FactorsNanog Homeobox ProteinNanog Homeobox ProteinThyroid Cancer and Nodulesmedicine.diseaseNeoplasm ProteinsUp-RegulationDoxorubicinDrug Resistance NeoplasmCell cultureNeoplastic Stem CellsCancer researchATP-Binding Cassette TransportersCisplatinOctamer Transcription Factor-3Thyroid
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Analysis of the MHC Class I Antigen Presentation Machinery in Human Embryonal Carcinomas: Evidence for Deficiencies in TAP, LMP and MHC Class I Expre…

1998

The expression of the major histocompatibility complex (MHC) class I antigens is suppressed in early post-implantation embryonic cells as well as in embryonal carcinoma (EC) cells, but could be upregulated by treatment with interferon (IFN)-gamma or retinoic acid. In a number of human and murine tumours, defects in the expression of the different components of the MHC class I antigen processing machinery, such as the proteasomal subunits LMP-2 and LMP-7 and the peptide transporters TAP-1 and TAP-2, account for impaired MHC class I surface expression. Here, we analysed the constitutive and IFN-gamma regulated mRNA and protein expression of the LMP, TAP and MHC class I molecules in the human …

Proteasome Endopeptidase ComplexCD74HIV AntigensImmunologyCD1CytomegalovirusInterferon-gammaATP Binding Cassette Transporter Subfamily B Member 3Multienzyme ComplexesCarcinoma EmbryonalMHC class ITumor Cells CulturedHumansATP Binding Cassette Transporter Subfamily B Member 2Antigens ViralAntigen PresentationbiologyAntigen processingMHC class I antigenHistocompatibility Antigens Class ITemperatureGeneral MedicineTransporter associated with antigen processingMHC restrictionMolecular biologyUp-RegulationCysteine EndopeptidasesProtein Biosynthesisbiology.proteinATP-Binding Cassette TransportersPeptidesCD8Scandinavian Journal of Immunology
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Bipartite regulation of different components of the MHC class I antigen-processing machinery during dendritic cell maturation

2001

Dendritic cells (DC) are professional antigen-presenting cells (APC) which proceed from immature to a mature stage during their final differentiation. Immature DC are highly effective in terms of antigen uptake and processing, whereas mature DC become potent immunostimulatory cells. Until now, the expression profiles of the major components of the MHC class I antigen-processing machinery (APM) during DC development have not been well characterized. In this study, the mRNA and protein expression levels of the IFN-gamma inducible proteasome subunits, of the proteasome activators PA28, and of key components required for peptide transport and MHC class I-peptide complex assembly have been evalu…

Proteasome Endopeptidase ComplexCD74ImmunologyAntigen presentationLipopolysaccharide ReceptorsDown-RegulationImmunoglobulinsMuscle ProteinsAntiportersMonocytesMultienzyme ComplexesMHC class IHumansImmunology and AllergyATP Binding Cassette Transporter Subfamily B Member 2Antigen PresentationMHC class IIbiologyAntigen processingMHC class I antigenHistocompatibility Antigens Class IMembrane Transport ProteinsProteinsCell DifferentiationDendritic CellsGeneral MedicineTransporter associated with antigen processingMHC restrictionMolecular biologyUp-RegulationCell biologyCysteine EndopeptidasesProtein TransportProtein Biosynthesisbiology.proteinATP-Binding Cassette TransportersPeptidesInternational Immunology
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