0000000000381485

AUTHOR

Teresa Prezzemolo

showing 4 related works from this author

Human CD8 T lymphocytes recognize Mycobacterium tuberculosis antigens presented by HLA-E during active tuberculosis and express type 2 cytokines

2015

CD8 T cells contribute to protective immunity against Mycobacterium tuberculosis. In humans, M. tuberculosis reactive CD8 T cells typically recognize peptides associated to classical MHC class Ia molecules, but little information is available on CD8 T cells recognizing M. tuberculosis Ags presented by nonclassical MHC class Ib molecules. We show here that CD8 T cells from tuberculosis (TB) patients recognize HLA-E-binding M. tuberculosis peptides in a CD3/TCR αβ mediated and CD8-dependent manner, and represent an additional type of effector cells playing a role in immune response to M. tuberculosis during active infection. HLA-E-restricted recognition of M. tuberculosis peptides is detectab…

MaleTetramersCytotoxicHLA-EReceptors Antigen T-Cell alpha-betaT-LymphocytesEpitopes T-LymphocyteHIV InfectionsMycobacterium tuberculosiEpitopesHLA-EReceptorsImmunology and AllergyCells CulturedType 2 cytokinealpha-betaCulturedbiologyCoinfectionType 2 cytokinesMedicine (all)BacterialMiddle AgedAcquired immune systemAntibodies Bacterialmedicine.anatomical_structureTBAntigenCytokinesFemaleNK Cell Lectin-Like Receptor Subfamily CNK Cell Lectin-Like Receptor Subfamily DCD8 T lymphocyteProtein BindingAdultTuberculosisSettore MED/17 - Malattie InfettiveT cellCellsImmunologyAntibodiesMycobacterium tuberculosisImmune systemAntigenMHC class ImedicineHumansTuberculosisAntigensSettore MED/04 - Patologia GeneraleAntigens BacterialCD8 T lymphocytes; HLA-E; Mycobacterium tuberculosis; TB; Tetramers; Type 2 cytokines; Adult; Antibodies Bacterial; Antigens Bacterial; Cells Cultured; Coinfection; Cytokines; Epitopes T-Lymphocyte; Female; HIV Infections; Histocompatibility Antigens Class I; Humans; Male; Middle Aged; Mycobacterium tuberculosis; NK Cell Lectin-Like Receptor Subfamily C; NK Cell Lectin-Like Receptor Subfamily D; Protein Binding; Receptors Antigen T-Cell alpha-beta; T-Lymphocytes Cytotoxic; Tuberculosis; Immunology; Immunology and Allergy; Medicine (all)Histocompatibility Antigens Class IMycobacterium tuberculosismedicine.diseasebiology.organism_classificationT-CellVirologyCD8 T lymphocytesT-LymphocyteImmunologybiology.proteinTetramerT-Lymphocytes CytotoxicCD8 T lymphocytes; HLA-E; Mycobacterium tuberculosis; TB; Tetramers; Type 2 cytokines; Immunology; Immunology and Allergy
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HLA-E-Restricted CD8+ T Lymphocytes Efficiently Control Mycobacterium tuberculosis and HIV-1 Co-Infection

2020

We investigated the contribution of human leukocyte antigen A2 (HLA-A2) and HLA-E-restricted CD8+ T cells in patients with Mycobacterium tuberculosis and human immunodeficiency virus 1 (HIV-1) coinfection. HIV-1 downregulates HLA-A, -B, and -C molecules in infected cells, thus influencing recognition by HLA class I-restricted CD8+ T cells but not by HLA-E-restricted CD8+ T cells, owing to the inability of the virus to downmodulate their expression. Therefore, antigen-specific HLA-E-restricted CD8+ T cells could play a protective role in Mycobacterium tuberculosis and HIV-1 coinfection. HLA-E- and HLA-A2-restricted Mycobacterium tuberculosis-specific CD8+ T cells were tested in vitro for cyt…

0301 basic medicinePulmonary and Respiratory MedicineAdultMaleTetramersTuberculosisHLA-EClinical BiochemistryT lymphocytesDown-RegulationHIV InfectionsHuman leukocyte antigenCD8-Positive T-Lymphocytes+Lymphocyte ActivationMycobacterium tuberculosis03 medical and health sciences0302 clinical medicineAntigenHLA-A2 AntigenmedicineCytotoxic T cellHumansTuberculosisLymphocyte CountMolecular BiologyAntigens BacterialbiologyCoinfectionHistocompatibility Antigens Class ICD8 T lymphocytes HLA-E Mycobacterium tuberculosis HIV tetramersCell BiologyCD8Mycobacterium tuberculosisMiddle Agedbiology.organism_classificationmedicine.diseaseVirology030104 developmental biology030228 respiratory systemCoinfectionHIV-1FemaleCD8Mycobacterium
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Functional Signatures of Human CD4 and CD8 T Cell Responses to Mycobacterium tuberculosis

2014

With 1.4 million deaths and 8.7 million new cases in 2011, tuberculosis (TB) remains a global health care problem and together with HIV and Malaria represents one of the three infectious diseases world-wide. Control of the global TB epidemic has been impaired by the lack of an effective vaccine, by the emergence of drug-resistant forms of Mycobacterium tuberculosis (Mtb) and by the lack of sensitive and rapid diagnostics. It is estimated, by epidemiological reports, that one third of the world's population is latently infected with Mtb, but the majority of infected individuals develop long-lived protective immunity, which controls and contains Mtb in a T cell-dependent manner. Development o…

lcsh:Immunologic diseases. AllergyTuberculosisPopulationImmunologyReview ArticleDiseaseMycobacterium tuberculosis03 medical and health sciences0302 clinical medicineImmunitymedicineM. tuberculosiscytokineinfection.Immunology and AllergyCytotoxic T celleducationImmunodeficiency030304 developmental biologySettore MED/04 - Patologia Generale0303 health scienceseducation.field_of_studydiseasebiologybusiness.industrymedicine.diseasebiology.organism_classificationVirologyinfection3. Good healthhuman memory T cellsImmunologyCytokinesbusinesslcsh:RC581-607human memory T cellMalaria030215 immunologyM. tuberculosi
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Detailed characterization of human Mycobacterium tuberculosis specific HLA-E restricted CD8+T cells

2018

HLA-E presented antigens are interesting targets for vaccination given HLA-Es’ essentially monomorphic nature. We have shown previously that Mycobacterium tuberculosis (Mtb) peptides are presented by HLA-E to CD8+effector T cells, but the precise phenotype and functional capacity of these cells remains poorly characterized. We have developed and utilized in this study a new protocol combining HLA-E tetramer with intracellular staining for cytokines, transcription factors and cytotoxic molecules to characterize these cells in depth. We confirm in this study the significantly increased ex vivo frequency of Mtb-peptide/HLA-E-TM+CD8+T cells in the circulation of patients with active tubercu…

Cytotoxicity Immunologic0301 basic medicineTetramersImmunologyHuman leukocyte antigenCD8-Positive T-LymphocytesLymphocyte ActivationCD8+TÂ&nbspArticleImmunophenotypingMycobacterium tuberculosis03 medical and health sciencesTh2Th2 CellsAntigenHLA-A2 AntigenmedicineHumansTuberculosisCytotoxic T cellImmunology and AllergyGranulysinTuberculosis VaccinesCytokineCells CulturedConserved SequenceCell ProliferationAntigens BacterialbiologyLatent tuberculosisHistocompatibility Antigens Class IMycobacterium tuberculosisActive TBcellCD8(+) TcellsFlow Cytometrybiology.organism_classificationmedicine.disease3. Good health030104 developmental biologyPerforinImmunologybiology.proteinCytokinesPeptidesCD8Tetramer
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