0000000000195246

AUTHOR

Emanuela Marcenaro

showing 3 related works from this author

Cognate HLA absence in trans diminishes human NK cell education

2016

NK cells are innate lymphocytes with protective functions against viral infections and tumor formation. Human NK cells carry inhibitory killer cell Ig-like receptors (KIRs), which recognize distinct HLAs. NK cells with KIRs for self-HLA molecules acquire superior cytotoxicity against HLA– tumor cells during education for improved missing-self recognition. Here, we reconstituted mice with human hematopoietic cells from donors with homozygous KIR ligands or with a mix of hematopoietic cells from these homozygous donors, allowing assessment of the resulting KIR repertoire and NK cell education. We found that co-reconstitution with 2 KIR ligand–mismatched compartments did not alter the frequenc…

0301 basic medicine10028 Institute of Medical VirologyEpstein-Barr Virus InfectionsHerpesvirus 4 HumanCellchemical and pharmacologic phenomena610 Medicine & healthMice SCIDHuman leukocyte antigen2700 General MedicineAdaptive ImmunityBiology10263 Institute of Experimental Immunology03 medical and health sciencesMice Inbred NOD10049 Institute of Pathology and Molecular PathologymedicineAnimalsHumansCytotoxicityReceptorHistocompatibility Antigens Class IHEK 293 cellsGeneral MedicineAcquired immune systemKiller Cells NaturalHaematopoiesisHEK293 Cells030104 developmental biologymedicine.anatomical_structureNatural-Killer-Cells Cord Blood Transplantation Cytomegalovirus-Infection Class-I Inhibitory receptors Pediatric Patients TumorsImmunologyK562 CellsResearch ArticleK562 cells
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NKp46-expressing human gut-resident intraepithelial Vδ1 T cell subpopulation exhibits high antitumor activity against colorectal cancer

2019

γδ T cells account for a large fraction of human intestinal intraepithelial lymphocytes (IELs) endowed with potent anti-tumor activities. However, little is known about their origin, phenotype and clinical relevance in colorectal cancer (CRC). To determine γδ IEL gut-specificity, homing and functions, γδ T cells were purified from human healthy blood, lymph nodes, liver, skin, intestine either disease-free or affected by CRC or generated from thymic precursors. The constitutive expression of NKp46 specifically identifies a new subset of cytotoxic Vδ1 T cells representing the largest fraction of gut-resident IELs. The ontogeny and gut-tropism of NKp46pos/Vδ1 IELs depends both on distinctive …

0301 basic medicineMaleColorectal cancerImmunotherapy AdoptiveMice0302 clinical medicineSex Hormone-Binding GlobulinCytotoxic T cellAntigens LyIntestinal MucosaIntraepithelial LymphocytesInnate immunityAged 80 and overGastroenterologyAge FactorsReceptors Antigen T-Cell gamma-deltaGeneral MedicineMiddle AgedPhenotypemedicine.anatomical_structure030220 oncology & carcinogenesisDisease ProgressionFemaleColorectal NeoplasmsResearch ArticleAdultColonT cellImmunologyT cellsBiologydigestive systemColorectal cancer; Gastroenterology; Immunology; Innate immunity; T cells03 medical and health sciencesYoung AdultIleummedicineAnimalsHumansAgedNeoplasm StagingTumor microenvironmentInnate immune systemNatural Cytotoxicity Triggering Receptor 1medicine.diseaseColorectal cancer030104 developmental biologyCancer researchIntraepithelial lymphocyteHoming (hematopoietic)T-Lymphocytes Cytotoxic
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Accumulation of Circulating CCR7+ Natural Killer Cells Marks Melanoma Evolution and Reveals a CCL19-Dependent Metastatic Pathway

2019

Abstract Immune checkpoint blockade therapy has changed prognoses for many melanoma patients. However, immune responses that correlate with clinical progression of the disease are still poorly understood. To identify immune responses correlating with melanoma clinical evolution, we analyzed serum cytokines as well as circulating NK and T-cell subpopulations from melanoma patients. The patients' immune profiles suggested that melanoma progression leads to changes in peripheral blood NK and T-cell subsets. Stage IV melanoma was characterized by an increased frequency of CCR7+CD56bright NK cells as well as high serum concentrations of the CCR7 ligand CCL19. CCR7 expression and CCL19 secretion …

0301 basic medicinecancer stem cellCancer ResearchT cellImmunologyCellchemical and pharmacologic phenomenaBiologyMetastasis03 medical and health sciences0302 clinical medicineImmune systemCancer stem cellmedicineNK cellMelanomaneoplasmsimmune surveillanceMelanomaCCL19medicine.diseaseImmune checkpoint030104 developmental biologymedicine.anatomical_structure030220 oncology & carcinogenesisCancer researchmetastasi
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