Tumor Stem Cell AssayNeoplastic Stem CellsColony-Forming Units AssayStem CellsHematopoietic Stem CellsBrain NeoplasmsGlioblastomaCell Line, TumorCell DifferentiationSpheroids, CellularGliomaCell ProliferationTransplantation, HeterologousStem Cell TransplantationTumor Markers, BiologicalEmbryonic Stem CellsMice, SCIDGlycoproteinsAdult Stem CellsPeptidesAntigens, CDNeoplasmsMice, NudeFlow CytometryAntineoplastic AgentsNeoplasm TransplantationPluripotent Stem CellsCell Transformation, NeoplasticTumor Cells, CulturedSignal TransductionHematopoietic Stem Cell TransplantationStem Cell NicheGene Expression Regulation, NeoplasticNeural Stem CellsInduced Pluripotent Stem CellsModels, BiologicalAntigens, CD24Multipotent Stem CellsMesenchymal Stem Cell TransplantationCells, CulturedMesenchymal Stromal CellsStem Cell FactorCell LineTumor Necrosis Factor-alpha