Hematopoietic Stem CellsChemokine CXCL12Cellular MicroenvironmentAntigens, CD34Hematopoietic Stem Cell MobilizationHematopoiesisStem Cell NicheReceptors, CXCR4Bone Marrow CellsHematopoietic SystemBone MarrowFetal BloodMice, Inbred C57BLGranulocyte Colony-Stimulating FactorColony-Forming Units AssayCell DifferentiationCell ProliferationHematopoietic Stem Cell TransplantationCell MovementIntegrin alpha4Cell LineageFlow CytometryCells, CulturedMice, Inbred NODMice, KnockoutMyeloid CellsMice, SCIDProto-Oncogene Proteins c-kitCell AdhesionChemotaxisStromal CellsZebrafishMesenchymal Stromal CellsSignal TransductionBone Marrow TransplantationCell SurvivalReverse Transcriptase Polymerase Chain ReactionMice, TransgenicGene Expression RegulationMembrane ProteinsApoptosis