Search results for " t-lymphocytes"

showing 10 items of 495 documents

CD8+CD45RA+CD27-CD28-T-cell subset in PBL of cervical cancer patients representing CD8+T-cells being able to recognize cervical cancer associated ant…

2003

Objective In response to antigenic stimulation, naive MHC-class I restricted and antigen-specific CD8+CD45RA+CD28+T-cells undergo clonal expansion and differentiate into CD8+CD45RO+ memory T-cells. Upon re- encounter with the nominal antigen, CD45RO+ T-cells are able to convert to CD8+CD45RA+CD28-T-cells displaying potent immune effector functions, including TNF-alpha production. This T-cell subpopulation constitutes a minor population in healthy individuals. In the present study we are currently evaluating whether this particular T-cell subset in PBL represents CD8+T-cells which may be able to recognize cervical cancer associated antigens provided by HPV 16 E7. Material and methods Flow-cy…

PopulationUterine Cervical Neoplasmschemical and pharmacologic phenomenaCD8-Positive T-LymphocytesBiologyEpitopeImmune systemCD28 AntigensAntigenAntigens CDT-Lymphocyte SubsetsmedicineHumansCytotoxic T cellAmino Acid SequenceeducationAntigens ViralPapillomaviridaeNeoplasm Stagingeducation.field_of_studyHistocompatibility TestingObstetrics and GynecologyCD28Cancerhemic and immune systemsmedicine.diseasePeptide FragmentsTumor Necrosis Factor Receptor Superfamily Member 7Lymphatic MetastasisImmunologyCytokinesLeukocyte Common AntigensFemaleCD8Zentralblatt für Gynäkologie
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Priming of Leishmania-Reactive CD8+ T cells In Vivo Does Not Require LMP7-Containing Immunoproteasomes

2012

Proteasome Endopeptidase ComplexLeishmaniasis CutaneousPriming (immunology)DermatologyCD8-Positive T-LymphocytesBiochemistryInterferon-gammaMiceIn vivomedicineAnimalsCytotoxic T cellInterferon gammaProteasome endopeptidase complexLeishmania majorMolecular BiologyLeishmania majorSkinMice KnockoutbiologyChemistryCell Biologybiology.organism_classificationCoculture TechniquesCell biologyMice Inbred C57BLDisease Models AnimalLangerhans CellsCoculture Techniquemedicine.drugJournal of Investigative Dermatology
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Vaccination with TAT-Antigen Fusion Protein Induces Protective, CD8+ T Cell-Mediated Immunity Against Leishmania Major

2010

In murine leishmaniasis, healing is mediated by IFN-γ-producing CD4 + and CD8 + T cells. Thus, an efficacious vaccine should induce Th1 and Tc1 cells. Dendritic cells (DCs) pulsed with exogenous proteins primarily induce strong CD4-dependent immunity; induction of CD8 responses has proven to be difficult. We evaluated the immunogenicity of fusion proteins comprising the protein transduction domain of HIV-1 TAT and the Leishmania antigen LACK ( Leishmania homolog of receptors for activated C kinase), as TAT-fusion proteins facilitate major histocompatibility complex class I-dependent antigen presentation. In vitro , TAT–LACK-pulsed DCs induced stronger proliferation of Leishmania -specific C…

Protozoan VaccinesAntigen presentationProtozoan ProteinsLeishmaniasis CutaneousAntigens ProtozoanDermatologyCD8-Positive T-LymphocytesBiologyMajor histocompatibility complexBiochemistryArticleMiceAntigenAnimalsCytotoxic T cellLeishmania majorMolecular BiologyLeishmania majorImmunogenicityDendritic CellsCell BiologyTh1 Cellsbiology.organism_classificationInterleukin-12Fusion proteinMice Mutant StrainsCell biologyMice Inbred C57BLImmunologybiology.proteintat Gene Products Human Immunodeficiency VirusViral Fusion ProteinsCD8Journal of Investigative Dermatology
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Characterization of the interstitial lung and peripheral blood T cell receptor repertoire in cigarette smokers.

2005

T lymphocytes modulate the pulmonary inflammatory response. The aim of this study was to evaluate the clonality within the interstitial lung and peripheral blood T cell receptor (TCR) repertoire in smokers. Interstitial T lymphocytes were isolated from surplus tissue of 16 patients (63 +/- 9 [+/- SD] yr old, 11 male) undergoing surgery due to lung cancer (n = 15) or emphysema. TCR clonality was assessed by PCR amplification followed by spectratyping. Nearly all TCR of interstitial lung lymphocytes showed oligoclonal bands (CD4(+) subset 13/16 patients, 81%; CD8(+) 100%) indicating a specific differentiation. Peripheral blood T lymphocytes (PBL) TCR (especially CD4(+)) had less oligoclonal b…

Pulmonary and Respiratory MedicineCD4-Positive T-LymphocytesMalePathologymedicine.medical_specialtyLung NeoplasmsCellular differentiationClinical BiochemistryReceptors Antigen T-Cellchemical and pharmacologic phenomenaBiologyCD8-Positive T-LymphocytesPolymerase Chain ReactionmedicineHumansIntraindividual comparisonCell LineageLung cancerMolecular BiologyLungAgedLungT-cell receptorSmokinghemic and immune systemsCell DifferentiationCell BiologyMiddle Agedmedicine.diseasePeripheral bloodT-Cell Receptor Repertoiremedicine.anatomical_structureBloodPulmonary EmphysemaFemaleCD8American journal of respiratory cell and molecular biology
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Permanent Loss of Human Leukocyte Antigen E–restricted CD8+ T Stem Memory Cells in Human Tuberculosis

2022

Pulmonary and Respiratory MedicineHLA AntigensHLA-EClinical BiochemistryTuberculosisMycobacterium tuberculosisStem cellsCell BiologyCD8-Positive T-LymphocytesMolecular BiologyAmerican Journal of Respiratory Cell and Molecular Biology
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Reduced apoptosis of CD8+ T-Lymphocytes in the airways of smokers with mild/moderate COPD

2011

SummaryChronic obstructive pulmonary disease (COPD) is characterised by chronic inflammation in airways and lung parenchyma. CD8+ T-lymphocytes, crucial effector and regulatory cells in inflammation, are increased in the central and peripheral airways in COPD. The aim of this study was to assess the role of apoptosis in the accumulation of CD8+ T-lymphocytes within the airway wall in COPD. We examined the submucosa of transverse sections of central and peripheral airways from post-operative tissues from non-smokers (n = 16), smokers with normal lung function (n = 16), smokers with mild/moderate COPD (n = 16), and smokers with severe/very severe COPD (n = 9). TUNEL and immunohistochemistry t…

Pulmonary and Respiratory MedicineMaleapoptosis cytotoxic T-lymphocytes inflammation lung tissueInflammationApoptosisSettore MED/10 - Malattie Dell'Apparato RespiratorioCD8-Positive T-LymphocytesFEV1/FVC ratioPulmonary Disease Chronic ObstructiveSubmucosaForced Expiratory VolumeParenchymamedicineHumansLungLung tissueInflammationCOPDAnalysis of VarianceLungbusiness.industryCytotoxic T-lymphocytesSmokingMiddle Agedrespiratory systemmedicine.diseaseImmunohistochemistryrespiratory tract diseasesmedicine.anatomical_structureImmunologybehavior and behavior mechanismsFemalemedicine.symptomAirwaybusinessCD8Respiratory Medicine
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Human leucocyte antigen-A2 restricted and Mycobacterium tuberculosis 19-kDa antigen-specific CD8+ T-cell responses are oligoclonal and exhibit a T-ce…

2001

CD8+ T cells can be grouped into two different types of secretory T lymphocytes, based on the cytokine-secretion pattern upon antigen exposure: those with a T-cell cytotoxic type 1 response (Tc1), which secrete interferon-gamma (IFN-gamma), or those with a T-cell cytotoxic type 2 response, which secrete interleukin (IL)-4 and IL-10. We examined the CD8+ T-cell response directed against an immunodominant human leucocyte antigen (HLA)-A2-presented peptide derived from a 19-kDa Mycobacterium tuberculosis-associated antigen. T cells were examined by functional analysis and by T-cell receptor (TCR) complementarity-determining region 3 (CDR3)-spectratyping, which defines the complexity of a T-cel…

Receptors Antigen T-Cell alpha-betaT cellImmunologyHuman leukocyte antigenCD8-Positive T-LymphocytesBiologyLymphocyte ActivationEpitopeCell LineInterferon-gammaAntigenHLA-A2 AntigenmedicineHumansImmunology and AllergyCytotoxic T cellAntigen-presenting cellTuberculosis PulmonaryAntigens BacterialImmunodominant EpitopesT-cell receptorGranulocyte-Macrophage Colony-Stimulating FactorMycobacterium tuberculosisOriginal ArticlesComplementarity Determining RegionsMolecular biologyPeptide FragmentsClone Cellsmedicine.anatomical_structureImmunologyInterleukin-4CD8Immunology
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Second-generation Langerhans cells originating from epidermal precursors are essential for CD8+ T cell priming.

2014

Abstract In vivo studies questioned the ability of Langerhans cells (LCs) to mediate CD8+ T cell priming. To address this issue, we used intradermal immunization with plasmid DNA, a system in which activation of CD8+ T cells depends on delayed kinetics of Ag presentation. We found that dendritic cells (DCs) located in the skin at the time of immunization have limited ability to activate CD8+ T cells. This activity was mediated by a second generation of DCs that differentiated in the skin several days after immunization, as well as by lymph node–resident DCs. Intriguingly, CD8+ T cell responses were not affected following treatment with clodronate liposomes, immunization of CCR2−/− mice, or …

Receptors CCR2T cellImmunologyPriming (immunology)CD11cchemical and pharmacologic phenomenaBiologyCD8-Positive T-LymphocytesLymphocyte ActivationMiceImmune systemGiant Cells LanghansmedicineImmunology and AllergyCytotoxic T cellAnimalsSkinMice KnockoutChemokine CCL20integumentary systemhemic and immune systemsCell DifferentiationDendritic CellsMolecular biologyCD11c AntigenCCL20Mice Inbred C57BLmedicine.anatomical_structureImmunologyIntercellular Signaling Peptides and ProteinsClodronic AcidCD8Ex vivoHeparin-binding EGF-like Growth FactorPlasmidsJournal of immunology (Baltimore, Md. : 1950)
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Amazing IL-9: revealing a new function for an “old” cytokine

2012

Th9 cells are a subset of CD4+ Th cells that produce the pleiotropic cytokine IL-9. IL-9/Th9 can function as both positive and negative regulators of immune response, but the role of IL-9/Th9 in tumor immunity is unknown. We examined the role of IL-9/Th9 in a model of pulmonary melanoma in mice. Lack of IL-9 enhanced tumor growth, while tumor-specific Th9 cell treatment promoted stronger antitumor responses in both prophylactic and therapeutic models. Th9 cells also elicited strong host antitumor CD8+ CTL responses by promoting Ccl20/Ccr6-dependent recruitment of DCs to the tumor tissues. Subsequent tumor antigen delivery to the draining LN resulted in CD8+ T cell priming. In agreement with…

Receptors CCR6Lung Neoplasmsmedicine.medical_treatmentBiologyCD8-Positive T-LymphocytesMiceImmunityCell Line TumormedicineAnimalsLack of knowledgeInterleukin 9MelanomaMice KnockoutAntigen PresentationImmunity CellularChemokine CCL20Antitumor immunityMelanomaInterleukin-9General MedicineDendritic CellsT-Lymphocytes Helper-Inducermedicine.diseaseCytokineImmunologyCommentaryImmunotherapySkin cancerFunction (biology)
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Regulatory T cells selectively preserve immune privilege of self-antigens during viral central nervous system infection.

2012

Abstract Regulatory T cells (Tregs) are important for the attenuation of immune reactions. During viral CNS infections, however, an indiscriminate maintenance of CNS immune privilege through Treg-mediated negative regulation could prevent autoimmune sequelae but impair the control of viral replication. We analyzed in this study the impact of Tregs on the development of acute viral encephalomyelitis, T cell-mediated antiviral protection, and prevention of CNS autoimmunity following intranasal infection with the gliatropic mouse hepatitis virus strain A59. To assess the contribution of Tregs in vivo, we specifically depleted CD4+Foxp3+ T cells in a diphtheria toxin-dependent manner. We found …

Receptors CXCR3T cellImmunologychemical and pharmacologic phenomenaAutoimmunityBiologyCD8-Positive T-Lymphocytesmedicine.disease_causeCXCR3Lymphocyte ActivationAutoantigensT-Lymphocytes RegulatoryLymphocyte DepletionAutoimmunity03 medical and health sciencesMice0302 clinical medicineCentral Nervous System InfectionsImmune privilegeImmunitymedicineImmunology and AllergyAnimalsHumansEncephalomyelitisAdministration Intranasal030304 developmental biologyCell Proliferation0303 health sciencesImmunity CellularMice Inbred BALB CMurine hepatitis virusFOXP3hemic and immune systemsForkhead Transcription Factors3. Good healthmedicine.anatomical_structureViral replicationImmunologyAcute DiseaseCD4 AntigensLymph NodesCoronavirus InfectionsCD8030215 immunologyJournal of immunology (Baltimore, Md. : 1950)
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