Tumor MicroenvironmentNeoplasmsCell HypoxiaCell Line, TumorCellular MicroenvironmentTumor Necrosis Factor-alphaTumor Markers, BiologicalTumor BurdenNeoplasms, ExperimentalNanotubes, PeptideWilms TumorCell ProliferationSignal TransductionMice, Inbred C57BLGenes, Tumor SuppressorNeoplasm MetastasisMetals, LightStem Cell NicheCarcinoid TumorCell DifferentiationTumor Suppressor Protein p53HydrogelsCell MovementNeovascularization, PathologicMice, Inbred BALB CElementary ParticlesNeuroendocrine TumorsMice, SCIDTransplantation, HeterologousCell Culture TechniquesTumor Suppressor ProteinsExtracellular MatrixBrain NeoplasmsStromal CellsCells, CulturedCell SurvivalMammary Neoplasms, ExperimentalMicrotechnologyXenograft Model Antitumor AssaysFlow CytometryCell DivisionCell CommunicationMicrofluidicsCell LineRNA, MessengerReverse Transcriptase Polymerase Chain ReactionCell Transformation, NeoplasticAdenocarcinomaMice, TransgenicBiocompatible MaterialsModels, BiologicalTime FactorsMelanoma, ExperimentalCoculture TechniquesGastrointestinal Stromal TumorsTissue EngineeringImmunohistochemistryDisease ProgressionStem CellsMice, NudeGene Expression ProfilingAntibodies, MonoclonalMolecular Sequence DataBreast NeoplasmsAntigens, NeoplasmGene Expression Regulation, NeoplasticMacrophagesThymus Gland