0000000000461047

AUTHOR

Nadine Grebe

showing 4 related works from this author

C57BL/6-specific conditions for efficient in utero electroporation of the central nervous system.

2014

Abstract Background In utero electroporation is a fast an efficient tool to specifically address gene expression in the murine central nervous system. This technique was originally established in ICR/CD-1 outbred mice. Neuroanatomical differences between the different mouse strains and variations in gestation length require the optimization of the conditions for each strain to avoid severe complications. Furthermore the relevant position information is currently only scarcely standardized and not always easy to transfer to C57BL/6 mice. New method In this study we present an improved method for in utero electroporation of C57BL/6 including a detailed atlas that allows for specific and effic…

C57BL/6Central Nervous SystemPathologymedicine.medical_specialtyCentral nervous systemGreen Fluorescent ProteinsImproved methodTransfectionAtlases as TopicSpecies SpecificityCell MovementIn vivo transfectionmedicineAnimalsNeuronsMicroscopy ConfocalbiologyGeneral NeuroscienceElectroporationTransfectionbiology.organism_classificationCell biologyMice Inbred C57BLmedicine.anatomical_structureElectroporationIn uteroGestation lengthJournal of neuroscience methods
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Protein kinase CK2 enables regulatory T cells to suppress excessive TH2 responses in vivo

2014

The quality of the adaptive immune response depends on the differentiation of distinct CD4(+) helper T cell subsets, and the magnitude of an immune response is controlled by CD4(+)Foxp3(+) regulatory T cells (Treg cells). However, how a tissue- and cell type-specific suppressor program of Treg cells is mechanistically orchestrated has remained largely unexplored. Through the use of Treg cell-specific gene targeting, we found that the suppression of allergic immune responses in the lungs mediated by T helper type 2 (TH2) cells was dependent on the activity of the protein kinase CK2. Genetic ablation of the β-subunit of CK2 specifically in Treg cells resulted in the proliferation of a hithert…

CD4-Positive T-LymphocytesMaleT cellImmunologyMice TransgenicReceptors Cell Surfacechemical and pharmacologic phenomenaCell Growth ProcessesT-Lymphocytes RegulatoryCell LineMiceTh2 CellsImmune systemHypersensitivitymedicineAnimalsHumansImmunology and AllergyIL-2 receptorCasein Kinase IIMice Inbred BALB CChemistryPeripheral toleranceFOXP3Cell DifferentiationForkhead Transcription FactorsDendritic CellsAcquired immune systemCell biologyMice Inbred C57BLmedicine.anatomical_structureCell cultureInterferon Regulatory FactorsImmunologyLeukocytes MononuclearIRF4Nature Immunology
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Tick Salivary Sialostatin L Represses the Initiation of Immune Responses by Targeting IRF4-Dependent Transcription in Murine Mast Cells

2015

Abstract Coevolution of ticks and the vertebrate immune system has led to the development of immunosuppressive molecules that prevent immediate response of skin-resident immune cells to quickly fend off the parasite. In this article, we demonstrate that the tick-derived immunosuppressor sialostatin L restrains IL-9 production by mast cells, whereas degranulation and IL-6 expression are both unaffected. In addition, the expression of IL-1β and IRF4 is strongly reduced in the presence of sialostatin L. Correspondingly, IRF4- or IL-1R–deficient mast cells exhibit a strong impairment in IL-9 production, demonstrating the importance of IRF4 and IL-1 in the regulation of the Il9 locus in mast cel…

Transcription GeneticCell DegranulationInterleukin-1betaImmunologyBiologyArticleCell DegranulationHost-Parasite InteractionsMiceImmune systemImmunityAnimalsImmunology and AllergyInterleukin 9Mast CellsPromoter Regions GeneticMice KnockoutRegulation of gene expressionMice Inbred BALB CBinding SitesInterleukin-6Interleukin-9DegranulationReceptors Interleukin-1CystatinsAsthmaImmunity InnateMice Inbred C57BLGene Expression RegulationInterferon Regulatory FactorsImmunologySignal transductionImmunosuppressive AgentsProtein BindingSignal TransductionInterferon regulatory factors
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Interferon-regulatory factor 4 is essential for the developmental program of T helper 9 cells.

2010

Summary Interferon-regulatory factor 4 (IRF4) is essential for the development of T helper 2 (Th2) and Th17 cells. Herein, we report that IRF4 is also crucial for the development and function of an interleukin-9 (IL-9)-producing CD4 + T cell subset designated Th9. IRF4-deficient CD4 + T cells failed to develop into IL-9-producing Th9 cells, and IRF4-specific siRNA inhibited IL-9 production in wild-type CD4 + T cells. Chromatin-immunoprecipitation (ChIP) analyses revealed direct IRF4 binding to the Il9 promoter in Th9 cells. In a Th9-dependent asthma model, neutralization of IL-9 substantially ameliorated asthma symptoms. The relevance of these findings is emphasized by the fact that the ind…

ImmunologyBiologyPathogenesisInterleukin 21MiceDownregulation and upregulationmedicineImmunology and AllergyAnimalsHumansInterleukin 9RNA Small InterferingMOLIMMUNOPromoter Regions GeneticCells CulturedMice KnockoutInterleukin-9Cell DifferentiationT helper cellT-Lymphocytes Helper-InducerAsthmaMice Inbred C57BLInfectious Diseasesmedicine.anatomical_structureCELLIMMUNOImmunologyInterferon Regulatory FactorsFunction (biology)Platelet factor 4IRF4Protein BindingImmunity
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