0000000000347435

AUTHOR

Michael Kofoed-nielsen

showing 4 related works from this author

Isolation and Flow Cytometry Analysis of Innate Lymphoid Cells from the Intestinal Lamina Propria

2017

The intestinal mucosa constitutes the biggest surface area of the body. It is constantly challenged by bacteria, commensal and pathogenic, protozoa, and food-derived irritants. In order to maintain homeostasis, a complex network of signaling circuits has evolved that includes contributions of immune cells. In recent years a subset of lymphocytes, which belong to the innate immune system, has caught particular attention. These so-called innate lymphoid cells (ILC) reside within the lamina propria of the small and large intestines and rapidly respond to environmental challenges. They provide immunity to various types of infections but may also contribute to organ homeostasis as they produce f…

0301 basic medicineLamina propriaInnate immune systemmedicine.diagnostic_testInnate lymphoid cellBiologyFlow cytometry03 medical and health sciences030104 developmental biology0302 clinical medicinemedicine.anatomical_structureImmune systemIntestinal mucosaImmunityImmunologymedicineHomeostasis030215 immunology
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Interleukin-12 and -23 Control Plasticity of CD127(+) Group 1 and Group 3 Innate Lymphoid Cells in the Intestinal Lamina Propria.

2015

Human group 1 ILCs consist of at least three phenotypically distinct subsets, including NK cells, CD127(+) ILC1, and intraepithelial CD103(+) ILC1. In inflamed intestinal tissues from Crohn's disease patients, numbers of CD127(+) ILC1 increased at the cost of ILC3. Here we found that differentiation of ILC3 to CD127(+) ILC1 is reversible in vitro and in vivo. CD127(+) ILC1 differentiated to ILC3 in the presence of interleukin-2 (IL-2), IL-23, and IL-1β dependent on the transcription factor RORγt, and this process was enhanced in the presence of retinoic acid. Furthermore, we observed in resection specimen from Crohn's disease patients a higher proportion of CD14(+) dendritic cells (DC), whi…

Interleukin 2Receptors Retinoic AcidCellular differentiationCD14ImmunologyInterleukin-1betaRetinoic acidLipopolysaccharide Receptorschemical and pharmacologic phenomenaTretinoinMice SCIDBiologyInterleukin-12 Subunit p35Interleukin-7 Receptor alpha Subunitchemistry.chemical_compoundMiceIntestinal mucosaCrohn DiseaseMice Inbred NODmedicineImmunology and AllergyAnimalsHumansRetinoid X Receptor gammaLymphocytesIntestinal MucosaInterleukin-7 receptorCells CulturedMice KnockoutRetinoic Acid Receptor alphaInnate lymphoid cellvirus diseaseshemic and immune systemsCell DifferentiationDendritic CellsNuclear Receptor Subfamily 1 Group F Member 3Molecular biologyKiller Cells NaturalMice Inbred C57BLInfectious DiseaseschemistryLymphocyte TransfusionImmunologyInterleukin 12Interleukin-23 Subunit p19Interleukin-2medicine.drugImmunity
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Innate lymphoid cells, precursors and plasticity

2016

Innate lymphoid cells (ILC) have only recently been recognized as a separate entity of the lymphoid lineage. Their subpopulations share common characteristics in terms of early development and major transcriptional circuitry with their related cousins of the T cell world. It is currently hypothesized that ILCs constitute an evolutionary older version of the lymphoid immune system. They are found at all primary entry points for pathogens such as mucosal surfaces of the lung and gastrointestinal system, the skin and the liver, which is the central contact point for pathogens that breach the intestinal barrier and enter the circulation. There, ILC contribute to the first line defense as well a…

0301 basic medicineCellular differentiationT cellCell PlasticityImmunologyBiology03 medical and health sciences0302 clinical medicineImmune systemCell PlasticitymedicineAnimalsHumansImmunology and AllergyCell Lineageskin and connective tissue diseasesPrecursor Cells T-LymphoidRegeneration (biology)Innate lymphoid cellGene Expression Regulation DevelopmentalCell DifferentiationT-Lymphocytes Helper-InducerImmunity InnateLymphocyte Subsetsbody regionsPhenotype030104 developmental biologyLymphatic systemmedicine.anatomical_structureImmunologyStem cellBiomarkersSignal TransductionT-Lymphocytes CytotoxicTranscription Factors030215 immunologyImmunology Letters
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The Transcription Factor T-bet Is Induced by IL-15 and Thymic Agonist Selection and Controls CD8αα+ Intraepithelial Lymphocyte Development

2014

Summary CD8αα + intraepithelial lymphocytes (IELs) are instrumental in maintaining the epithelial barrier in the intestine. Similar to natural killer cells and other innate lymphoid cells, CD8αα + IELs constitutively express the T-box transcription factor T-bet. However, the precise role of T-bet for the differentiation or function of IELs is unknown. Here we show that mice genetically deficient for T-bet lacked both TCRαβ + and TCRγδ + CD8αα + IELs and thus are more susceptible to chemically induced colitis. Although T-bet was induced in thymic IEL precursors (IELPs) as a result of agonist selection and interleukin-15 (IL-15) receptor signaling, it was dispensable for the generation of IEL…

AgonistCD4-Positive T-Lymphocytesmedicine.drug_classCD8 AntigensReceptors Antigen T-Cell alpha-betaImmunologychemical and pharmacologic phenomenaBiologyCD8-Positive T-Lymphocytesdigestive systemMiceTRANSCRIPTION FACTOR TmedicineTranscriptional regulationImmunology and AllergyAnimalsIntestinal MucosaTranscription factorInterleukin-15Mice KnockoutReceptors Interleukin-15Innate lymphoid cellCell DifferentiationEpithelial CellsReceptors Antigen T-Cell gamma-deltahemic and immune systemsColitisCell biologyIntestinesMice Inbred C57BLInfectious DiseasesInterleukin 15ImmunologyIntraepithelial lymphocyteT-Box Domain ProteinstissuesFunction (biology)Signal TransductionImmunity
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