Cell DifferentiationMyocytes, CardiacCells, CulturedEmbryonic Stem CellsAnimals, NewbornStem CellsMyocardiumGene Expression Regulation, DevelopmentalFetal BloodCell TransdifferentiationSignal TransductionRNA, MessengerFetusCell LineageGene Expression RegulationCell LinePluripotent Stem CellsTranscription FactorsInduced Pluripotent Stem CellsCell DivisionNuclear ReprogrammingEmbryo, MammalianCell Culture TechniquesFibroblastsHeartPhenotypeAgingTime FactorsMolecular Sequence DataAdult Stem CellsCloning, OrganismGene Expression ProfilingCardiomegalyCell ProliferationFlow CytometryMice, TransgenicTranscription, GeneticSex DifferentiationMice, Inbred C57BLRats, Sprague-DawleyInfant, NewbornMyocardial ContractionReverse Transcriptase Polymerase Chain ReactionModels, BiologicalMice, KnockoutApoptosisGene ExpressionImmunohistochemistryTretinoinDNA-Binding ProteinsRats, WistarCalciumHeart VentriclesBase SequenceHomeodomain ProteinsBlotting, WesternMesenchymal Stromal CellsCell SurvivalTransfectionAntigens, DifferentiationPregnancyGATA4 Transcription FactorCell SizePhosphorylationUp-RegulationOsteogenesisOsteoblastsMyoblastsMuscle DevelopmentMitochondria, HeartRegenerationAdipogenesisDown-RegulationBone Marrow CellsPromoter Regions, GeneticIn Situ HybridizationMuscle CellsEnzyme ActivationTrans-ActivatorsMuscle ProteinsCoculture TechniquesNeuronsBasic Helix-Loop-Helix Transcription FactorsSarcomeresHematopoietic Stem CellsAdipocytesMyocardial Reperfusion InjuryCardiotonic AgentsHypertrophyMutationCell CycleConnexin 43Nuclear ProteinsDNA PrimersMesodermMicroscopy, ConfocalCell SeparationChick EmbryoDimethyl SulfoxideTumor Cells, Cultured