0000000000079452

AUTHOR

Pauliina Korhonen

showing 3 related works from this author

Age-related changes in the regulation of transcription factor NF-kappa B in rat brain.

1997

Aging process involves an increase in stress at cellular level. We studied whether aging affects the regulation of stress responsive transcription factor NF-kappa B in brain samples of Wistar rats. Hippocampus, cerebellum, and temporal and frontal lobes of cortex were studied. We observed a significant up-regulation in the constitutive, nucleus-located NF-kappa B binding activity in 30-month-old Wistar rats compared to young and 18-month-old rats. The increase was most prominent in cerebellum and in frontal cortex, but age-related changes did not occur in hippocampus. Inducible, cytoplasmic NF-kappa B binding activity was not affected by aging in any of the samples studied. Western blot ass…

SenescenceMalemedicine.medical_specialtyAgingP50HippocampusNerve Tissue ProteinsBiologyHippocampuschemistry.chemical_compoundWestern blotInternal medicineCerebellummedicineAnimalsRats WistarTranscription factorRegulation of gene expressionCell Nucleusmedicine.diagnostic_testGeneral NeuroscienceNF-kappa BBrainNF-κBTemporal LobeCell biologyFrontal LobeRatsUp-RegulationB vitaminsEndocrinologychemistryGene Expression RegulationFemaleProtein BindingNeuroscience letters
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Down-regulation of transcription factors AP-1, Sp-1, and NF-kappa B precedes myocyte differentiation.

1996

Terminal differentiation of myocytes involves withdrawal from the cell cycle, induction of myogenin expression, and finally formation of myotubes. To study the factors that regulate the initial phase of muscle differentiation, we analyzed the binding activities of transcription factors AP-1, Sp-1, and NF-kappa B in L6, C2C12, and rhabdomyosarcoma BA-Han-1C cells. Temporal changes in transcription factor binding activities were compared to the activation of myogenin promoter-driven CAT reporter gene and the expression level of myogenin, a master gene of myogenic differentiation. We observed a prominent decrease in the nuclear binding activities of AP-1, Sp-1, and NF-kappa B already 12 to 24 …

Cholera ToxinSp1 Transcription FactorCellular differentiationBiophysicsDown-RegulationBiologyMuscle DevelopmentBiochemistryRetinoblastoma ProteinCell FusionMiceOkadaic AcidTumor Cells CulturedMyocyteAnimalsMuscle SkeletalMolecular BiologyTranscription factorMyogeninCell fusionMyogenesisNF-kappa BCell DifferentiationCell BiologyCell cyclemusculoskeletal systemMolecular biologyRatsUp-RegulationTranscription Factor AP-1MyogeninC2C12Protein BindingBiochemical and biophysical research communications
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Down-Regulation of Ku Autoantigen, DNA-Dependent Protein Kinase, and Poly(ADP-ribose) Polymerase during Cellular Senescence

1997

During aging and cellular senescence mutations accumulate in genomic and mitochondrial DNA. Ku autoantigens, DNA-dependent protein kinase, and poly (ADP-ribose) polymerase have an essential role in DNA damage recognition. Our purpose was to find out whether cellular senescence of fibroblasts affects the protein components that recognize DNA damage and induce the repair process. We compared presenescent and replicatively senescent human WI-38 fibroblasts with each other and with SV-40 immortalized and serum-deficient quiescent WI-38 cells. Our results showed that replicative senescence significantly decreased the nuclear level of both p70 and p86 components of Ku autoantigen. SV-40 immortali…

SenescenceDNA damagePoly ADP ribose polymeraseMolecular Sequence DataBiophysicsDown-RegulationP70-S6 Kinase 1DNA FragmentationDNA-Activated Protein KinaseProtein Serine-Threonine KinasesAutoantigensBiochemistryCell LineDownregulation and upregulationHumansAmino Acid SequenceProtein kinase AKu AutoantigenLungMolecular BiologyCellular SenescencePolymerasebiologyDNA HelicasesNuclear ProteinsAntigens NuclearCell BiologyFibroblastsMolecular biologyDNA-Binding ProteinsApoptosisbiology.proteinPoly(ADP-ribose) PolymerasesBiochemical and Biophysical Research Communications
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