0000000000557783

AUTHOR

Nguyen Thi Xuan

showing 2 related works from this author

A20 deficiency in B cells enhances B-cell proliferation and results in the development of autoantibodies.

2011

A20/TNFAIP3 is an ubiquitin-editing enzyme, important for the regulation of the NF-κB pathway. Mutations in the TNFAIP3 gene have been linked to different human autoimmune disorders. In human B-cell lymphomas, the inactivation of A20 results in constitutive NF-κB activation. Recent studies demonstrate that in mice the germline inactivation of A20 leads to early lethality, due to inflammation in multiple organs of the body. In this report, we describe a new mouse strain allowing for the tissue-specific deletion of A20. We show that B-cell-specific deletion of A20 results in a dramatic reduction in marginal zone B cells. Furthermore, A20-deficient B cells display a hyperactive phenotype repre…

ImmunologyB-Lymphocyte SubsetsInflammationBiologymedicine.disease_causeLymphocyte ActivationGermlineAutoimmunityMiceimmune system diseaseshemic and lymphatic diseasesmedicineImmunology and AllergyAnimalsHumansTumor Necrosis Factor alpha-Induced Protein 3AutoantibodiesCell ProliferationMice KnockoutB-LymphocytesCell growthAutoantibodyIntracellular Signaling Peptides and ProteinsNF-kappa BMarginal zoneGerminal CenterMolecular biologyPhenotypeCell biologyCysteine EndopeptidasesModels Animalbiology.proteinmedicine.symptomAntibodySignal TransductionEuropean journal of immunology
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A20 expression in dendritic cells protects mice from LPS-induced mortality

2014

DCs contribute to immune homeostasis under physiological conditions and regulate the immune activation during infection. The deubiquitinase A20 inhibits the activation of NF-κB-dependent immune reactions, and prevents the hyperactivation of DCs under steady-state conditions. However, the role of DC-specific A20 under pathological conditions is unknown. Here, we demonstrate that upon injection of low-dose LPS, mice with DC-specific A20 deletion (CD11c-Cre A20(fl/fl) ) died within 6 h, whereas A20(fl/fl) controls survived. LPS-induced mortality in CD11c-Cre A20(fl/fl) mice was characterized by increased serum levels of IL-2, IL-10, IL-12, IFN-γ, and TNF. Upon LPS stimulation, the activation o…

MAPK/ERK pathwayRegulation of gene expressionImmunologychemical and pharmacologic phenomenaStimulationTumor Necrosis Factor alpha-Induced Protein 3Biologymedicine.disease_causeIn vitroAutoimmunityimmune system diseasesIn vivohemic and lymphatic diseasesImmunologymedicineImmunology and AllergyTumor necrosis factor alphaEuropean Journal of Immunology
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