0000000000069667

AUTHOR

Martin Lenter

showing 3 related works from this author

miR-155 inhibition sensitizes CD4+ Th cells for TREG mediated suppression.

2009

BackgroundIn humans and mice naturally occurring CD4(+)CD25(+) regulatory T cells (nTregs) are a thymus-derived subset of T cells, crucial for the maintenance of peripheral tolerance by controlling not only potentially autoreactive T cells but virtually all cells of the adaptive and innate immune system. Recent work using Dicer-deficient mice irrevocably demonstrated the importance of miRNAs for nTreg cell-mediated tolerance.Principal findingsDNA-Microarray analyses of human as well as murine conventional CD4(+) Th cells and nTregs revealed a strong up-regulation of mature miR-155 (microRNA-155) upon activation in both populations. Studying miR-155 expression in FoxP3-deficient scurfy mice …

CD4-Positive T-LymphocytesScienceImmunology/ImmunomodulationBiologyModels BiologicalT-Lymphocytes RegulatoryImmune tolerancemiR-155MiceDownregulation and upregulationImmune ToleranceAnimalsHumansIL-2 receptorOligonucleotide Array Sequence AnalysisMultidisciplinaryInnate immune systemGenetics and Genomics/Functional GenomicsQInterleukin-2 Receptor alpha SubunitRPeripheral toleranceFOXP3Forkhead Transcription FactorsTransfectionImmunity InnateCell biologyUp-RegulationKineticsMicroRNAsImmunologyImmunology/Immune ResponseMedicineGenetics and Genomics/Genetics of the Immune SystemResearch ArticlePLoS ONE
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Generation of monoclonal antibodies against human regulatory T cells.

2009

Abstract Natural CD4 + CD25 + Foxp3 + regulatory T cells (Tregs) control the activation of the immune system and therefore have become a major area of research in immunology. The generation of monoclonal antibodies against human Tregs offers the possibility to discover novel Treg-specific or Treg-associated surface markers and to identify targets for a therapeutic modulation of Tregs. Here we present a methodology optimized to efficiently induce and select mAb against human Tregs by repeated immunization of mice with Tregs from a single donor and a differential two-step flow cytometry-based hybridoma screening procedure.

Anticorps monoclonalmedicine.drug_classImmunologyReceptors Antigen T-Cellchemical and pharmacologic phenomenaCell SeparationBiologyMonoclonal antibodyT-Lymphocytes RegulatoryFlow cytometryEpitopesMiceImmune systemAntibody SpecificitymedicineImmunology and AllergyAnimalsHumansIL-2 receptorLeukapheresisImmunization ScheduleHybridomasmedicine.diagnostic_testInterleukin-2 Receptor alpha SubunitFOXP3Antibodies Monoclonalhemic and immune systemsForkhead Transcription FactorsT lymphocyteFlow CytometryImmunizationImmunologyFemaleEpitope MappingJournal of immunological methods
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Large scale preparation of human MHC class II+ integrin beta(1)+ Tregs.

2010

Abstract The human CD4 + CD25 + FoxP3 + regulatory T cell population (Tregs) contains both MHC class II + and MHC class II − cells. MHC class II + Tregs belong to the integrin α 4 β 1 + subpopulation and exclusively execute contact-dependent suppressive activity. Here we present a method optimized for isolation of these MHC class II expressing Tregs from large leukaphereses products using magnetic microbeads that achieves a reproducible purity of more than 90% and enables the use of this small-sized Treg population in pre-clinical application and basic research.

Regulatory T cellImmunologyPopulationIntegrinchemical and pharmacologic phenomenaIntegrin alpha4beta1T-Lymphocytes RegulatoryT-Lymphocyte SubsetsmedicineImmune ToleranceImmunology and AllergyHumansIL-2 receptorLeukapheresiseducationCells CulturedMHC class IIeducation.field_of_studybiologyImmunomagnetic SeparationHistocompatibility Antigens Class IIInterleukin-2 Receptor alpha SubunitFOXP3hemic and immune systemsForkhead Transcription FactorsT lymphocyteMHC restrictionFlow CytometryCell biologyHigh-Throughput Screening Assaysmedicine.anatomical_structureImmunologyCD4 Antigensbiology.proteinJournal of immunological methods
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