Search results for "T-cell response"

showing 3 items of 3 documents

Burkitt lymphoma with a granulomatous reaction: an M1/Th1‐polarised microenvironment is associated with controlled growth and spontaneous regression

2021

Aims Burkitt lymphoma (BL) is an aggressive B-cell lymphoma that, in some instances, may show a granulomatous reaction associated with a favourable prognosis and occasional spontaneous regression. In the present study, we aimed to define the tumour microenvironment (TME) in four such cases, two of which regressed spontaneously. Methods and results All cases showed aggregates of tumour cells with the typical morphology, molecular cytogenetics and immunophenotype of BL surrounded by a florid epithelioid granulomatous reaction. All four cases were Epstein-Barr virus (EBV)-positive with type I latency. Investigation of the TME showed similar features in all four cases. The analysis revealed a p…

MaleEpstein-Barr Virus InfectionsHerpesvirus 4 HumanHistologyAdolescentM1 polarised macrophagesTh1 T cellsExpressionBiologyT-Cell ResponsesVirusPathology and Forensic MedicineProinflammatory cytokineMolecular cytogeneticsOriginImmunophenotypingEBVM1 polarised macrophagehemic and lymphatic diseasesTumor MicroenvironmentmedicineHumansM1 polarized macrophagesAgedInhibitionMacrophagesBurkitt lymphomaBurkitt lymphoma; EBV; In Situ lymphoid neoplasia; M1 polarized macrophages; Microenvironment; Th1 T cells; granulomatous reactionB-CellsGeneral MedicineMiddle AgedTh1 Cellsmedicine.diseaseBurkitt LymphomamicroenvironmentRegressionLymphomain-situ lymphoid neoplasiagranulomatous reactionCancer researchFemaleTherapyCellular immunotherapyInfectionEarly phaseBurkitt lymphoma EBV granulomatous reaction in-situ lymphoid neoplasia M1 polarised macrophages microenvironment Th1 T cellsIn Situ lymphoid neoplasiaEpstein-Barr-VirusHistopathology
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The NK Cell Response to Mouse Cytomegalovirus Infection Affects the Level and Kinetics of the Early CD8+ T-Cell Response

2012

ABSTRACT Natural killer (NK) cells and CD8 + T cells play a prominent role in the clearance of mouse cytomegalovirus (MCMV) infection. The role of NK cells in modulating the CD8 + T-cell response to MCMV infection is still the subject of intensive research. For analyzing the impact of NK cells on mounting of a CD8 + T-cell response and the contribution of these cells to virus control during the first days postinfection (p.i.), we used C57BL/6 mice in which NK cells are specifically activated through the Ly49H receptor engaged by the MCMV-encoded ligand m157. Our results indicate that the requirement for CD8 + T cells in early MCMV control inversely correlates with the engagement of Ly49H. W…

MaleMuromegalovirusImmunologyNK cellsCD8-Positive T-LymphocytesBiologym157MicrobiologyRodent DiseasesMice03 medical and health sciencesInterleukin 210302 clinical medicineVirologyAnimalsCytotoxic T cellmouse cytomegalovirus; NK cells; T-cell response; Ly49H; m157IL-2 receptor030304 developmental biologyMice Inbred BALB C0303 health sciencesJanus kinase 3ZAP70BIOMEDICINE AND HEALTHCARE. Basic Medical Sciences.Herpesviridae InfectionsNatural killer T cellMouse cytomegalovirus3. Good healthKiller Cells NaturalMice Inbred C57BLKineticsT-cell responseInsect ScienceImmunologyInterleukin 12CytokinesPathogenesis and ImmunityFemaleLy49HBIOMEDICINA I ZDRAVSTVO. Temeljne medicinske znanosti.CD8030215 immunology
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Metabolism via arginase or nitric oxide synthase: two competing arginine pathways in macrophages

2014

Macrophages play a major role in the immune system, both as antimicrobial effector cells and as immunoregulatory cells, which induce, suppress or modulate adaptive immune responses. These key aspects of macrophage biology are fundamentally driven by the phenotype of macrophage arginine metabolism that is prevalent in an evolving or ongoing immune response. M1 macrophages express the enzyme nitric oxide synthase (NOS), which metabolizes arginine to nitric oxide (NO) and citrulline. NO can be metabolized to further downstream reactive nitrogen species, while citrulline might be reused for efficient NO synthesis via the citrulline-NO cycle. M2 macrophages are characterized by expression of the…

lcsh:Immunologic diseases. AllergyArginineMOUSE MACROPHAGESImmunologyReview ArticlemacrophageM1 and M2BiologyArginineamino acid transporterchemistry.chemical_compoundImmune systemALTERNATIVELY ACTIVATED MACROPHAGESCitrullineImmunology and AllergyMacrophageALVEOLAR MACROPHAGESIN-VIVOReactive nitrogen speciesMARROW-DERIVED MACROPHAGESScience & TechnologyT-CELL RESPONSESMOLECULAR-CLONINGArginaseImmunoregulationAcquired immune systemM2 MacrophageArginaseTUMOR-ASSOCIATED MACROPHAGESchemistryBiochemistryMURINE MACROPHAGESAMINO-ACID TRANSPORTERSNitric Oxide Synthaselcsh:RC581-607Life Sciences & BiomedicineFrontiers in Immunology
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