Cell ProliferationCell DivisionCells, CulturedCell DifferentiationSignal TransductionCell Line, TumorApoptosisCell CycleRNA, MessengerBromodeoxyuridineCell LineMice, Inbred C57BLCell SurvivalCell MovementImmunohistochemistryBlotting, WesternLymphocyte ActivationPhosphorylationReverse Transcriptase Polymerase Chain ReactionProliferating Cell Nuclear AntigenMice, KnockoutFlow CytometryTumor Cells, CulturedGene Expression RegulationKi-67 AntigenRNA, Small InterferingDown-RegulationMolecular Sequence DataT-LymphocytesTime FactorsGene Expression Regulation, NeoplasticMice, TransgenicCell Growth ProcessesTransfectionDose-Response Relationship, DrugStem CellsEpithelial CellsGene ExpressionUp-RegulationTranscription FactorsCell CountCyclin D1Mice, Inbred BALB CGene Expression Regulation, DevelopmentalFibroblastsRNA InterferenceSperm MaturationThymidineSexual MaturationBase SequenceMice, NudeMutationOocytesProto-Oncogene Proteins c-aktEnzyme ActivationDendritic CellsMuscle, Smooth, VascularCyclin-Dependent Kinase Inhibitor p27DNAPhenotypeGrowth InhibitorsAmino Acid SequenceCell Cycle ProteinsEnzyme InhibitorsDNA-Binding ProteinsRats, Sprague-DawleyCell Transformation, NeoplasticModels, BiologicalProto-Oncogene ProteinsHyperplasiaRecombinant ProteinsGene Knockdown TechniquesExtracellular Signal-Regulated MAP KinasesProtein-Serine-Threonine KinasesMyocytes, Smooth MuscleMitogensNuclear ProteinsProto-Oncogene Proteins c-mycMAP Kinase Signaling SystemCyclin-Dependent Kinase Inhibitor p21Gene Expression ProfilingAntigens, CDAntineoplastic AgentsB-LymphocytesDisease Models, AnimalCell AdhesionMitogen-Activated Protein Kinase 3Protein BindingOogenesisTranscription, GeneticCytokinesGrowth SubstancesG1 PhaseMitosisAnimals, NewbornCell NucleusMembrane ProteinsMitogen-Activated Protein Kinase 1Transforming Growth Factor betaBreast Neoplasms