Search results for " T-Lymphocytes"

showing 10 items of 495 documents

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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Identification of epitopes of Mycobacterium tuberculosis 16-kDa protein recognized by human leukocyte antigen-A*0201 CD8(+) T lymphocytes.

2002

CD8(+) T cells could make an important contribution to protection against tuberculosis (TB), but the antigenic determinants recognized in the context of major histocompatibility complex class I molecules remain ill defined. Our aim was to identify nonamer peptides derived from the acr/16-kDa antigen. Two immunogenic peptides (p21-29 and p120-128) were identified by their ability to elicit cytotoxic CD8(+) T cells from juvenile patients recovering from TB. Epitope-specific recognition was demonstrated by the lysis of both Mycobacterium tuberculosis-infected and peptide-pulsed macrophages, the release of cytotoxic granules, and interferon-gamma and tumor necrosis factor-alpha production. CD8(…

Antigens Differentiation T-LymphocyteCytotoxicity ImmunologicMalePore Forming Cytotoxic ProteinsT cellEpitopes T-LymphocyteHuman leukocyte antigenCD8-Positive T-LymphocytesMajor histocompatibility complexEpitopeInterferon-gammaImmune systemAntigenBacterial ProteinsHLA-A2 AntigenmedicineImmunology and AllergyCytotoxic T cellHumansChildTuberculosis PulmonaryMembrane GlycoproteinsbiologyHLA-A AntigensPerforinTumor Necrosis Factor-alphaMacrophagesMycobacterium tuberculosisFlow CytometryPeptide FragmentsMolecular WeightInfectious Diseasesmedicine.anatomical_structureImmunologybiology.proteinFemaleCD8The Journal of infectious diseases
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Missense mutations in the fas gene resulting in autoimmune lymphoproliferative syndrome: A molecular and immunological analysis

1997

AbstractProgrammed cell death (or apoptosis) is a physiological process essential to the normal development and homeostatic maintenance of the immune system. The Fas/Apo-1 receptor plays a crucial role in the regulation of apoptosis, as demonstrated by lymphoproliferation in MRL-lpr/lpr mice and by the recently described autoimmune lymphoproliferative syndrome (ALPS) in humans, both of which are due to mutations in the Fas gene. We describe a novel family with ALPS in which three affected siblings carry two distinct missense mutations on both the Fas gene alleles and show lack of Fas-induced apoptosis. The children share common clinical features including splenomegaly and lymphadenopathy, b…

Antigens Differentiation T-LymphocyteMaleAdolescentT-LymphocytesCD3ImmunologyLymphoproliferative disordersBiologyLymphocyte ActivationAutoimmune DiseaseBiochemistryFas ligandImmunophenotypingImmune systemPedigree; Antigens Differentiation T-Lymphocyte; Solubility; Apoptosis; Autoimmune Diseases; Humans; Antigens CD95; Child; Lymphocytes; Child Preschool; Lymphocyte Activation; Syndrome; Lymphoproliferative Disorders; Adolescent; Mutation; Immunophenotyping; Male; Biological Markers; T-LymphocytesmedicineChildAutoimmune diseaseApoptosiSyndromeCell BiologyHematologymedicine.diseaseFas receptorPedigreeAntigens CD95SolubilityApoptosisChild PreschoolLymphoproliferative DisorderAutoimmune lymphoproliferative syndromeMutationBiological MarkerImmunologybiology.proteinLymphocyteHuman
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5-Fluorouracil Selectively Kills Tumor-Associated Myeloid-Derived Suppressor Cells Resulting in Enhanced T Cell–Dependent Antitumor Immunity

2010

AbstractMyeloid-derived suppressor cells (MDSC) accumulate in the spleen and tumor bed during tumor growth. They contribute to the immune tolerance of cancer notably by inhibiting the function of CD8(+) T cells. Thus, their elimination may hamper tumor growth by enhancing antitumor T-cell functions. We have previously reported that some anticancer agents relied on T cell–dependent anticancer responses to achieve maximal efficacy. However, the effect of anticancer agents on MDSC has remained largely unexplored. In this study, we observed that gemcitabine and 5-fluorouracil (5FU) were selectively cytotoxic on MDSC. In vivo, the treatment of tumor-bearing mice with 5FU led to a major decrease …

Antimetabolites AntineoplasticCancer ResearchT-LymphocytesT cellMice NudeApoptosisCD8-Positive T-LymphocytesBiologyDeoxycytidineImmune toleranceMiceImmune systemCell Line TumormedicineAnimalsCytotoxic T cellMice Inbred BALB CDendritic CellsT lymphocyteFlow CytometryGemcitabineMice Inbred C57BLmedicine.anatomical_structureOncologyCell cultureImmune SystemImmunologyMyeloid-derived Suppressor CellCancer researchFluorouracilNeoplasm TransplantationCD8Cancer Research
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JAK3/STAT5/6 Pathway Alterations Are Associated with Immune Deviation in CD8+ T Cells in Renal Cell Carcinoma Patients

2010

To investigate the molecular mechanisms underlying altered T cell response in renal cell carcinoma (RCC) patients, we compared autologous and allogeneic CD8(+) T cell responses against RCC line from RCC patients and their HLA-matched donors, using mixed lymphocyte/tumor cell cultures (MLTCs). In addition, we analyzed the expression of molecules associated with cell cycle regulation. Autologous MLTC responder CD8(+) T cells showed cytotoxic activity against RCC cell lines; however the analysis of the distribution of CD8(+) T-cell subsets revealed that allogenic counterparts mediate superior antitumor efficacy. In RCC patients, a decreased proliferative response to tumor, associated with defe…

Article SubjectCell Survivallcsh:Biotechnologylcsh:MedicineEnzyme-Linked Immunosorbent AssayE2F4 Transcription FactorCD8-Positive T-Lymphocytesurologic and male genital diseaseslcsh:TP248.13-248.65Chromium IsotopesSTAT5 Transcription FactorTumor Cells CulturedHumansCarcinoma Renal CellInhibitor of Differentiation Protein 2Microscopy Confocallcsh:RCell CycleIntracellular Signaling Peptides and ProteinsJanus Kinase 3Flow Cytometryfemale genital diseases and pregnancy complicationsKidney NeoplasmsGene Expression Regulation NeoplasticCase-Control StudiesLymphocyte Culture Test MixedSTAT6 Transcription FactorCyclin-Dependent Kinase Inhibitor p27Research ArticleSignal TransductionJournal of Biomedicine and Biotechnology
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Dynamic Antigen Presentation Patterns of Listeria monocytogenes-Derived CD8 T Cell Epitopes In Vivo

2001

Abstract Little information exists regarding the presentation of antigenic peptides in infected tissues. In this study the in vivo presentation of four different CD8 T cell epitopes of Listeria monocytogenes was monitored. Peptide presentation was measured by a new, highly sensitive, ex vivo Ag presentation assay that was based on the testing of freshly isolated cells from infected spleens with peptide-specific CD8 T cell lines in an IFN-γ-specific ELISPOT assay. Remarkably, the peptide presentation pattern of splenocytes and that of macrophages purified from spleens of L. monocytogenes-infected mice were different from those of in vitro infected macrophage-like cell lines. The in vivo Ag p…

Bacterial ToxinsImmunologyAntigen presentationEpitopes T-LymphocyteEnzyme-Linked Immunosorbent AssayCD8-Positive T-LymphocytesBiologyEpitopeHemolysin ProteinsMiceBacterial ProteinsIn vivoTumor Cells CulturedAnimalsImmunology and AllergyCytotoxic T cellLymphocyte CountAntigen-presenting cellHeat-Shock ProteinsAntigen PresentationLeukemia P388MacrophagesELISPOTListeria monocytogenesVirologyPeptide FragmentsKineticsOrgan SpecificityCell cultureInjections IntravenousFemaleSpleenEx vivoThe Journal of Immunology
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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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