Cell AgingCell CycleCyclin-Dependent Kinase Inhibitor p16Cell Cycle ProteinsCyclin-Dependent Kinase Inhibitor p21Telomerebeta-GalactosidaseTumor Suppressor Protein p53Aging, PrematureTelomeraseCells, CulturedAgingCell ProliferationFibroblastsApoptosisDNA DamageCell Cycle CheckpointsRetinoblastoma ProteinSignal TransductionCell Line, TumorCell DivisionBiological ProcessesTelomere ShorteningEnzyme InductionCell LineGene Expression RegulationOxidative StressG1 PhaseReactive Oxygen SpeciesDNA-Binding ProteinsTime FactorsRNA, MessengerCyclinsDown-RegulationBlotting, WesternMitosisPlant LeavesRNA, Small InterferingUp-RegulationPhosphorylationRNA InterferencePhenotypeFlow CytometryCell DifferentiationEndothelial CellsS PhaseReverse Transcriptase Polymerase Chain ReactionHistonesMice, Inbred C57BLTransfectionTranscription FactorsMolecular Sequence DataTOR Serine-Threonine KinasesTumor Suppressor ProteinsGene Expression Regulation, NeoplasticMutationG2 PhaseCyclin-Dependent Kinase Inhibitor p27Nuclear ProteinsMice, KnockoutProtein-Serine-Threonine KinasesStem CellsG2 Phase Cell Cycle CheckpointsDose-Response Relationship, DrugModels, BiologicalTranscription, Geneticp38 Mitogen-Activated Protein KinasesBase SequenceMenstrual CycleEnzyme ActivationTumor Cells, CulturedCell Transformation, NeoplasticImmunohistochemistryPromoter Regions, GeneticCell NucleusGene Expression Regulation, PlantCell SurvivalCyclin-Dependent Kinase 2Cyclin-Dependent Kinase 4G0 PhaseDNA ReplicationCyclin D1G1 Phase Cell Cycle CheckpointsCyclin EGene ExpressionTumor Suppressor Protein p14ARFCDC2 Protein KinaseGene Expression ProfilingAmino Acid SequenceDNAEndothelium, VascularHeLa CellsGenes, cdcArabidopsisRepressor ProteinsCyclin AEthylenesBiological MarkersChlorophyllNeoplasms