0000000000586856

AUTHOR

Andrea I. Schäfer

showing 3 related works from this author

Impaired DNA demethylation of C/EBP sites causes premature aging

2018

Changes in DNA methylation are among the best-documented epigenetic alterations accompanying organismal aging. However, whether and how altered DNA methylation is causally involved in aging have remained elusive. GADD45α (growth arrest and DNA damage protein 45A) and ING1 (inhibitor of growth family member 1) are adapter proteins for site-specific demethylation by TET (ten-eleven translocation) methylcytosine dioxygenases. Here we show that Gadd45a/Ing1 double-knockout mice display segmental progeria and phenocopy impaired energy homeostasis and lipodystrophy characteristic of Cebp (CCAAT/enhancer-binding protein) mutants. Correspondingly, GADD45α occupies C/EBPβ/δ-dependent superenhancers …

0301 basic medicinePremature agingAgingLipodystrophyDNA damageCell Cycle ProteinsBiology03 medical and health sciencesMiceGeneticsAnimalsHomeostasisEpigeneticsCells CulturedDemethylationMice KnockoutNuclear ProteinsAging PrematureMethylationCell biologyChromatinDNA Demethylation030104 developmental biologyDNA demethylationDNA methylationCCAAT-Enhancer-Binding ProteinsInhibitor of Growth Protein 1Developmental BiologyResearch Paper
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Gadd45α modulates aversive learning through post‐transcriptional regulation of memory‐related mRNA s

2018

Abstract Learning is essential for survival and is controlled by complex molecular mechanisms including regulation of newly synthesized mRNAs that are required to modify synaptic functions. Despite the well‐known role of RNA‐binding proteins (RBPs) in mRNA functionality, their detailed regulation during memory consolidation is poorly understood. This study focuses on the brain function of the RBP Gadd45α (growth arrest and DNA damage‐inducible protein 45 alpha, encoded by the Gadd45a gene). Here, we find that hippocampal memory and long‐term potentiation are strongly impaired in Gadd45a‐deficient mice, a phenotype accompanied by reduced levels of memory‐related mRNAs. The majority of the Ga…

Pain ThresholdUntranslated regionRegulatorGene ExpressionCell Cycle ProteinsHippocampusBiochemistryArticlememoryMice03 medical and health sciences0302 clinical medicineGeneticsAnimalsLearningRNA MessengerMolecular BiologyPost-transcriptional regulationGrin2a030304 developmental biologyMice Knockout0303 health sciencesMessenger RNANeuronal PlasticityBehavior AnimalbiologyLong-term potentiationArticlesRNA stabilityAmygdalaRNA BiologyCell biologyGene Expression Regulationbiology.proteinGRIN2ARNA InterferenceMemory consolidationGADD45A030217 neurology & neurosurgeryGadd45aNeuroscienceEMBO reports
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Role of the DNA repair glycosylase OGG1 in the activation of murine splenocytes

2017

OGG1 (8-oxoguanine-DNA glycosylase) is the major DNA repair glycosylase removing the premutagenic DNA base modification 8-oxo-7,8-dihydroguanine (8-oxoG) from the genome of mammalian cells. In addition, there is accumulating evidence that OGG1 and its substrate 8-oxoG might function in the regulation of certain genes, which could account for an attenuated immune response observed in Ogg1-/- mice in several settings. Indications for at least two different mechanisms have been obtained. Thus, OGG1 could either act as an ancillary transcription factor cooperating with the lysine-specific demethylase LSD1 or as an activator of small GTPases. Here, we analysed the activation by lipopolysaccaride…

0301 basic medicineGuanineDNA RepairDNA repairp38 mitogen-activated protein kinasesBiologyBiochemistryDNA GlycosylasesMice03 medical and health sciencesAnimalsMolecular BiologyTranscription factorTumor Necrosis Factor-alphaKinaseActivator (genetics)MacrophagesDNACell BiologyBase excision repairMolecular biology030104 developmental biologyGene Expression RegulationDNA glycosylaseTumor necrosis factor alphaSpleenDNA DamageTranscription FactorsDNA Repair
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