Search results for "CD4-Positive T-Lymphocyte"

showing 10 items of 254 documents

Impact of antiretroviral and tuberculosis therapies on CD4 + and CD8 + HIV/M. tuberculosis-specific T-cell in co-infected subjects

2018

Abstract Background Human Immunodeficiency Virus (HIV) infection is a risk factor for tuberculosis (TB). Antiretroviral therapy (ART) changed HIV clinical management but it is still unclear how pre-existing HIV/Mycobacterium tuberculosis (Mtb)-specific CD4+ and CD8+ T-cells are restored. Aim to evaluate the impact of ART and TB therapies on the functional and phenotypic profile of Mtb-specific antigen-response of CD4+ and CD8+ T-cells in prospectively enrolled HIV-TB co-infected patients. Methods ART-naive HIV-infected patients, with or without active TB or latent TB infection (LTBI), were enrolled before and after starting ART and TB therapies. Peripheral blood mononuclear cells (PBMC) wer…

AdultMale0301 basic medicineTuberculosisTuberculosiImmunologyT-Lymphocyte SubsetMycobacterium tuberculosiPeripheral blood mononuclear cellMycobacterium tuberculosisAntitubercular Agent03 medical and health sciences0302 clinical medicineAntigenImmunology and AllergyMedicineHIV Infection030212 general & internal medicineCD8 + T-cellsRisk factorCytokineHIV AntigenAntigens BacterialbiologyCoinfectionbusiness.industryHIVvirus diseasesCD8-Positive T-Lymphocytebacterial infections and mycosesmedicine.diseasebiology.organism_classification030104 developmental biologyHIV AntigensCD4-Positive T-LymphocyteCD4 + T-cellsTuberculosis therapyImmunologyLeukocytes MononuclearCoinfectionAnti-Retroviral AgentFemalebusinessARTCD8HumanImmunology Letters
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The Transcription Factor T-bet Is Induced by IL-15 and Thymic Agonist Selection and Controls CD8αα+ Intraepithelial Lymphocyte Development

2014

Summary CD8αα + intraepithelial lymphocytes (IELs) are instrumental in maintaining the epithelial barrier in the intestine. Similar to natural killer cells and other innate lymphoid cells, CD8αα + IELs constitutively express the T-box transcription factor T-bet. However, the precise role of T-bet for the differentiation or function of IELs is unknown. Here we show that mice genetically deficient for T-bet lacked both TCRαβ + and TCRγδ + CD8αα + IELs and thus are more susceptible to chemically induced colitis. Although T-bet was induced in thymic IEL precursors (IELPs) as a result of agonist selection and interleukin-15 (IL-15) receptor signaling, it was dispensable for the generation of IEL…

AgonistCD4-Positive T-Lymphocytesmedicine.drug_classCD8 AntigensReceptors Antigen T-Cell alpha-betaImmunologychemical and pharmacologic phenomenaBiologyCD8-Positive T-Lymphocytesdigestive systemMiceTRANSCRIPTION FACTOR TmedicineTranscriptional regulationImmunology and AllergyAnimalsIntestinal MucosaTranscription factorInterleukin-15Mice KnockoutReceptors Interleukin-15Innate lymphoid cellCell DifferentiationEpithelial CellsReceptors Antigen T-Cell gamma-deltahemic and immune systemsColitisCell biologyIntestinesMice Inbred C57BLInfectious DiseasesInterleukin 15ImmunologyIntraepithelial lymphocyteT-Box Domain ProteinstissuesFunction (biology)Signal TransductionImmunity
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Different response of TH1 cells for stimulation with anti-CD3 antibodies.

1990

In this report, evidence is provided for a further subdivision of CD4+ T helper cell lines. The earlier definition of the TH1 and TH2 subtypes was confirmed by their differential response to interleukin (IL) 1. An additional subdivision of the TH1 subset was revealed when TH1 cell lines were costimulated with anti-CD3 antibodies and IL2. The IL2-induced proliferation of three of the resulting TH1 lines was blocked by anti-CD3 antibodies. By contrast, no such block was observed in a fourth TH1 cell line. In all four lines anti-CD3 triggering caused production of IL2. The block of proliferation was reversed neither by antigen-presenting cells nor by phorbol 12-myristate 13-acetate, a protein …

Antigens Differentiation T-LymphocyteCD4-Positive T-LymphocytesCD3 ComplexCell Survivalmedicine.medical_treatmentImmunologyDose-Response Relationship ImmunologicReceptors Antigen T-CellMice Inbred StrainsBiologyLymphocyte Activationchemistry.chemical_compoundMiceAntigenmedicineImmunology and AllergyAnimalsInterleukin 4Cell growthInterleukinAntibodies MonoclonalT helper cellT-Lymphocytes Helper-InducerMolecular biologyCytokinemedicine.anatomical_structurechemistryCell cultureImmunologyPhorbolInterleukin-2Tetradecanoylphorbol AcetateInterleukin-4SpleenEuropean journal of immunology
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Depletion of alloreactive T cells via CD69: implications on antiviral, antileukemic and immunoregulatory T lymphocytes

2005

Selective depletion of alloreactive T cells from stem-cell allografts should abrogate graft-versus-host disease while preserving beneficial T cell specificities to facilitate engraftment and immune reconstitution. We therefore explored a refined immunomagnetic separation strategy to effectively deplete alloreactive donor lymphocytes expressing the activation antigen CD69 upon stimulation, and examined the retainment of antiviral, antileukemic, and immunoregulatory T cells. In addition to the CD69high T cell fraction, our studies retrieved two T cell subsets based on residual CD69 expression. Whereas, truly CD69(neg) cells were devoid of detectable alloresponses to original stimulators, CD69…

Antigens Differentiation T-LymphocyteCD4-Positive T-LymphocytesEpstein-Barr Virus InfectionsHerpesvirus 4 HumanT cellCytomegalovirusGraft vs Host DiseaseCell Cycle Proteinschemical and pharmacologic phenomenaStreptamerBiologyLymphocyte ActivationLymphocyte DepletionCell LineInterleukin 21Antigens CDmedicineHumansTransplantation HomologousCytotoxic T cellLectins C-TypeIL-2 receptorAntigen-presenting cellTransplantationHematopoietic Stem Cell TransplantationNuclear ProteinsForkhead Transcription FactorsReceptors Interleukin-2hemic and immune systemsHematologyT lymphocyteNatural killer T cellDNA-Binding Proteinsmedicine.anatomical_structureCytomegalovirus InfectionsImmunologyRNA Splicing FactorsCarrier ProteinsImmunologic MemoryBone Marrow Transplantation
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NF-ATp plays a prominent role in the transcriptional induction of Th2-type lymphokines

1997

Antigens Differentiation T-LymphocyteCD4-Positive T-LymphocytesTranscription GeneticImmunologyCell CountSpleenDNA-binding proteinMiceTh2 CellsAntigens CDmedicineAnimalsImmunology and AllergyLectins C-TypeLymphocytesL-SelectinNuclear proteinTranscription factorLymphokinesNFATC Transcription FactorsbiologyChemistryLymphokineNuclear ProteinsGene deletionNFATC Transcription FactorsCell biologyDNA-Binding ProteinsHyaluronan Receptorsmedicine.anatomical_structureImmunologybiology.proteinL-selectinGene DeletionSpleenTranscription FactorsImmunology Letters
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Multiple in vitro and in vivo regulatory effects of budesonide in CD4+ T lymphocyte subpopulations of allergic asthmatics.

2012

Abstract BACKGROUND: Increased activation and increased survival of T lymphocytes characterise bronchial asthma. OBJECTIVES: In this study the effect of budesonide on T cell survival, on inducible co-stimulator T cells (ICOS), on Foxp3 and on IL-10 molecules in T lymphocyte sub-populations was assessed. METHODS: Cell survival (by annexin V binding) and ICOS in total lymphocytes, in CD4+/CD25+ and in CD4+/CD25- and Foxp3 and IL-10 in CD4+/CD25+ and in CD4+/CD25-cells was evaluated, by cytofluorimetric analysis, in mild intermittent asthmatics (n = 19) and in controls (n = 15). Allergen induced T lymphocyte proliferation and the in vivo effects of budesonide in mild persistent asthmatics (n =…

BudesonideCD4-Positive T-LymphocytesMalePulmonologylcsh:Medicineimmune system diseasesT-Lymphocyte SubsetsMolecular Cell Biologylcsh:ScienceBudesonidecigarette smoke airway epithelial cells reactive oxygen species.MultidisciplinaryT CellsAllergy and HypersensitivityClinical Pharmacologyhemic and immune systemsForkhead Transcription Factorsrespiratory systemMiddle AgedFlow CytometryBronchodilator AgentsInterleukin-10Interleukin 10MedicineFemalemedicine.drugResearch ArticleAdultDrugs and DevicesAdolescentCell SurvivalImmune CellsImmunologychemical and pharmacologic phenomenaInducible T-Cell Co-Stimulator ProteinImmunomodulationIn vivomedicineHumansInducible T-Cell Co-Stimulator ProteinBiologyAsthmaCell Proliferationbusiness.industrylcsh:RT lymphocytemedicine.diseaseIn vitroAsthmarespiratory tract diseasesApoptosisImmunologylcsh:QClinical ImmunologybusinessCytometryPloS one
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Delivering all in one: Antigen-nanocapsule loaded with dual adjuvant yields superadditive effects by DC-directed T cell stimulation

2018

Therapeutic vaccination is and remains a major challenge, particularly in cancer treatment. In this process, the effective activation of dendritic cells by a combination of distinctly acting adjuvants and an antigen is crucial for success. While most common vaccine formulations lack the efficiency to trigger sufficient T cell responses in a therapeutic tumor treatment, nanovaccines offer unique properties to tackle that challenge. Here, we report the stepwise development of a nanocapsule for vaccination approaches, comprising a shell consisting of antigen and loaded with a superadditive adjuvant combination. In a first initial step, we identified the combination of resiquimod (R848) and mur…

CD4-Positive T-Lymphocytes0301 basic medicineCell SurvivalOvalbuminT-Lymphocytesmedicine.medical_treatmentT cellPharmaceutical ScienceMice Transgenic02 engineering and technologyCD8-Positive T-LymphocytesCancer VaccinesCell Line03 medical and health scienceschemistry.chemical_compoundNanocapsulesAntigenmedicineAnimalsHumansAntigensCytotoxicityAdjuvants PharmaceuticCell ProliferationChemistryImidazolesDextransDendritic CellsDendritic cell021001 nanoscience & nanotechnologyCell biologyMice Inbred C57BL030104 developmental biologymedicine.anatomical_structureCytokinesSpermineResiquimod0210 nano-technologyAcetylmuramyl-Alanyl-IsoglutamineAdjuvantMuramyl dipeptideCD8Journal of Controlled Release
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Innate Effector-Memory T-Cell Activation Regulates Post-Thrombotic Vein Wall Inflammation and Thrombus Resolution

2016

Rationale: Immune cells play an important role during the generation and resolution of thrombosis. T cells are powerful regulators of immune and nonimmune cell function, however, their role in sterile inflammation in venous thrombosis has not been systematically examined. Objective: This study investigated the recruitment, activation, and inflammatory activity of T cells in deep vein thrombosis and its consequences for venous thrombus resolution. Methods and Results: CD4 + and CD8 + T cells infiltrate the thrombus and vein wall rapidly on deep vein thrombosis induction and remain in the tissue throughout the thrombus resolution. In the vein wall, recruited T cells largely consist of effect…

CD4-Positive T-Lymphocytes0301 basic medicineChemokineMice 129 StrainPhysiologyMice TransgenicInflammationCD8-Positive T-Lymphocytes030204 cardiovascular system & hematologyVaricose VeinsMice03 medical and health sciences0302 clinical medicineImmune systemmedicineAnimalsHumansThrombusVeinInflammationVenous ThrombosisbiologyEffector Memory T-CellThrombosismedicine.diseaseThrombosisImmunity InnateCell biologyMice Inbred C57BLVenous thrombosis030104 developmental biologymedicine.anatomical_structureImmunologybiology.proteinmedicine.symptomCardiology and Cardiovascular MedicineCirculation Research
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Protein-prime/modified vaccinia virus Ankara vector-boost vaccination overcomes tolerance in high-antigenemic HBV-transgenic mice

2015

Abstract Background Therapeutic vaccination is a novel treatment approach for chronic hepatitis B, but only had limited success so far. We hypothesized that optimized vaccination schemes have increased immunogenicity, and aimed at increasing therapeutic hepatitis B vaccine efficacy. Methods Modified Vaccinia virus Ankara (MVA) expressing hepatitis B virus (HBV) antigens was used to boost protein-prime vaccinations in wildtype and HBV-transgenic (HBVtg) mice. Results Protein-prime/MVA-boost vaccination was able to overcome HBV-specific tolerance in HBVtg mice with low and medium but not with high antigenemia. HBV-specific antibody titers, CD8+ T-cell frequencies and polyfunctionality inverse…

CD4-Positive T-Lymphocytes0301 basic medicineHBsAgHepatitis B vaccineImmunization SecondaryMice TransgenicVaccinia virusCD8-Positive T-Lymphocytesmedicine.disease_cause03 medical and health scienceschemistry.chemical_compoundAntigenNeutralization TestsImmune ToleranceAnimalsMedicineHepatitis B VaccinesHepatitis B e AntigensHepatitis B AntibodiesHepatitis B virusHepatitis B Surface AntigensGeneral VeterinaryGeneral Immunology and Microbiologybusiness.industryImmunogenicityPublic Health Environmental and Occupational Healthvirus diseasesHepatitis BHepatitis Bmedicine.diseaseAntibodies NeutralizingHepatitis B Core AntigensVirologyMice Inbred C57BLVaccination030104 developmental biologyInfectious DiseaseschemistryImmunologyMolecular MedicineVacciniabusinessVaccine
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Comparative analysis of variation and selection in the HCV genome

2016

AbstractGenotype 1 of the hepatitis C virus (HCV) is the most prevalent of the variants of this virus. Its two main subtypes, HCV-1a and HCV-1b, are associated to differences in epidemic features and risk groups, despite sharing similar features in most biological properties. We have analyzed the impact of positive selection on the evolution of these variants using complete genome coding regions, and compared the levels of genetic variability and the distribution of positively selected sites. We have also compared the distributions of positively selected and conserved sites considering different factors such as RNA secondary structure, the presence of different epitopes (antibody, CD4 and C…

CD4-Positive T-Lymphocytes0301 basic medicineMicrobiology (medical)GenotypeEpitopes T-LymphocyteGenome ViralHepacivirusCD8-Positive T-LymphocytesBiologyGenoma humàMicrobiologyGenomeEpitopeNucleic acid secondary structureEvolution MolecularViral Proteins03 medical and health sciencesNegative selection0302 clinical medicineGenotypeGeneticsHumansCoding regionAmino Acid SequenceGenetic variabilitySelection GeneticMolecular BiologyGenePhylogenyEcology Evolution Behavior and SystematicsSelection (genetic algorithm)GeneticsGenetic VariationSequence Analysis DNAHepatitis C AntibodiesHepatitis C ChronicVirus030104 developmental biologyInfectious DiseasesRNA Viral030211 gastroenterology & hepatology
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