Cell AgingCell CycleCell Cycle ProteinsCyclin-Dependent Kinase Inhibitor p16Cyclin-Dependent Kinase Inhibitor p21Telomerebeta-GalactosidaseTumor Suppressor Protein p53Aging, PrematureTelomeraseCell ProliferationCell Cycle CheckpointsBiological ProcessesRetinoblastoma ProteinCells, CulturedAgingDNA DamageApoptosisCell DivisionFibroblastsCell Line, TumorTelomere ShorteningSignal TransductionG1 PhaseOxidative StressMitosisReactive Oxygen SpeciesCyclinsS PhaseCell LineGene Expression RegulationTime FactorsDNA-Binding ProteinsEndothelial CellsPhosphorylationFlow CytometryDown-RegulationRNA, Small InterferingBlotting, WesternRNA InterferenceHistonesG2 PhaseUp-RegulationPhenotypeTOR Serine-Threonine KinasesMenstrual CycleCyclin-Dependent Kinase Inhibitor p27Cell DifferentiationG2 Phase Cell Cycle CheckpointsStem CellsRNA, MessengerGene Expression Regulation, NeoplasticReverse Transcriptase Polymerase Chain ReactionTransfectionProtein-Serine-Threonine KinasesTumor Suppressor ProteinsNuclear ProteinsG0 PhaseMice, Inbred C57BLMice, KnockoutCyclin-Dependent Kinase 2p38 Mitogen-Activated Protein KinasesDose-Response Relationship, DrugG1 Phase Cell Cycle CheckpointsCDC2 Protein KinasePlant LeavesMutationMolecular Sequence DataCyclin D1DNA ReplicationCyclin ECyclin-Dependent Kinase 4Transcription FactorsEnzyme ActivationGenes, cdcImmunohistochemistryModels, BiologicalCyclin ACell NucleusCyclin BEndothelium, VascularInterphaseCDC2-CDC28 KinasesTumor Cells, CulturedE2F Transcription FactorsHeLa CellsTranscription, GeneticCell SurvivalEstrous CycleBiological MarkersAtherosclerosisBase Sequencecdc25 PhosphatasesDNACell Transformation, NeoplasticSaccharomyces cerevisiaeAmino Acid SequenceGene Expression ProfilingCyclin B1Bromodeoxyuridine