0000000000704471

AUTHOR

Dimitri Tyrsin

showing 2 related works from this author

NFATc1 Induction in Peripheral T and B Lymphocytes

2013

Abstract NFAT transcription factors control the proliferation and survival of peripheral lymphocytes. We have reported previously that the short isoform NFATc1/αA whose generation is induced by immune receptor stimulation supports the proliferation and inhibits the activation-induced cell death of peripheral T and B cells. We will show in this study that in novel bacterial artificial chromosome transgenic mice that express EGFP under the control of entire Nfatc1 locus the Nfatc1/Egfp transgene is expressed as early as in double-negative thymocytes and in nonstimulated peripheral T and B cells. Upon immune receptor stimulation, Nfatc1/Egfp expression is elevated in B, Th1, and Th2 cells, but…

LipopolysaccharidesGene isoformChromosomes Artificial BacterialProgrammed cell deathTransgeneGreen Fluorescent ProteinsImmunologyGene ExpressionMice TransgenicStimulationImmune receptorBiologyLymphocyte ActivationT-Lymphocytes RegulatoryAntibodiesMiceTh2 CellsGenes ReporterTransforming Growth Factor betaAnimalsProtein IsoformsImmunology and AllergyPromoter Regions GeneticTranscription factorCell ProliferationB-LymphocytesNFATC Transcription Factorsintegumentary systemNF-kappa BCD28NFATTh1 CellsMolecular biologyMice Inbred C57BLTh17 CellsThe Journal of Immunology
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Autoregulation of NFATc1/A Expression Facilitates Effector T Cells to Escape from Rapid Apoptosis

2002

AbstractThreshold levels of individual NFAT factors appear to be critical for apoptosis induction in effector T cells. In these cells, the short isoform A of NFATc1 is induced to high levels due to the autoregulation of the NFATc1 promoter P1 by NFATs. P1 is located within a CpG island in front of exon 1, represents a DNase I hypersensitive chromatin site, and harbors several sites for binding of inducible transcription factors, including a tandemly arranged NFAT site. A second promoter, P2, before exon 2, is not controlled by NFATs and directs synthesis of the longer NFATc1/B+C isoforms. Contrary to other NFATs, NFATc1/A is unable to promote apoptosis, suggesting that NFATc1/A enhances eff…

Gene isoformTranscription GeneticMolecular Sequence DataImmunologyApoptosisBiologyT-Lymphocytes RegulatoryJurkat CellsMiceExonAnimalsDeoxyribonuclease IHomeostasisHumansImmunology and AllergyPromoter Regions GeneticTranscription factorMice Inbred BALB CBase SequenceNFATC Transcription Factorsintegumentary systemEffectorNuclear ProteinsNFATDNA MethylationMolecular biologyChromatinDNA-Binding ProteinsAlternative SplicingInfectious DiseasesCpG siteApoptosisElectrophoresis Polyacrylamide GelPoly ATranscription FactorsImmunity
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