Cell AgingCell CycleTelomereTelomeraseCyclin-Dependent Kinase Inhibitor p16FibroblastsCell Cycle ProteinsTumor Suppressor Protein p53Cyclin-Dependent Kinase Inhibitor p21Cell DivisionCells, CulturedCell Proliferationbeta-GalactosidaseTelomere ShorteningAgingRetinoblastoma ProteinDNA DamageDiploidyCyclinsCell Cycle CheckpointsTumor Suppressor Protein p14ARFCell LineApoptosisCell Line, TransformedDNA-Binding ProteinsGene Expression RegulationWerner SyndromeCyclin-Dependent Kinase Inhibitor p27Tumor Suppressor ProteinsSignal TransductionCyclin-Dependent Kinase Inhibitor p15Cyclin-Dependent Kinase 6G1 PhaseCyclin-Dependent Kinase 4DNA ReplicationNuclear ProteinsTelomere HomeostasisProtein-Serine-Threonine KinasesPhenotypeDown-RegulationMitosisOxidative StressPlant LeavesTranscription FactorsRNA, MessengerMutationRNA, Small InterferingCell Line, TumorS PhaseBlotting, WesternReactive Oxygen SpeciesTime FactorsSirtuin 1Models, BiologicalCell Transformation, NeoplasticRepressor ProteinsGene Expression ProfilingNeoplasmsFlow CytometryCell DifferentiationUp-RegulationAging, PrematureCyclin-Dependent KinasesCell NucleusDNAHistonesKeratinocytesGene ExpressionG2 PhaseCell SurvivalTransfectionG2 Phase Cell Cycle CheckpointsTumor Cells, CulturedReverse Transcriptase Polymerase Chain ReactionBase SequenceRetroviridaeHydrogen PeroxideAntigens, Polyomavirus TransformingGene SilencingGene Expression Regulation, NeoplasticMenstrual CycleEmbryo, MammalianPhosphorylationAntigens, CD28ProteinsMolecular Sequence DataCyclin-Dependent Kinase 2MicroRNAsEnzyme InhibitorsG0 PhaseEndothelial CellsG1 Phase Cell Cycle CheckpointsGene Expression Regulation, PlantCyclin D1Cyclin ERNA InterferenceCDC2 Protein KinaseRNACD8-Positive T-LymphocytesGenes, cdc