Tumor MicroenvironmentCell Line, TumorNeoplasmsCellular MicroenvironmentNeovascularization, PathologicMice, NudeTumor BurdenNeoplasms, ExperimentalStromal CellsCell ProliferationNeoplasm TransplantationXenograft Model Antitumor AssaysTransplantation, HeterologousTumor Markers, BiologicalNeoplasm MetastasisMice, Inbred BALB CMice, SCIDGene Expression Regulation, NeoplasticSignal TransductionTumor EscapeMammary Neoplasms, ExperimentalLymphocytes, Tumor-InfiltratingMelanoma, ExperimentalMice, Inbred C57BLCell MovementCell HypoxiaAntineoplastic AgentsTumor Necrosis Factor-alphaBreast NeoplasmsDisease ProgressionCell Transformation, NeoplasticBrain NeoplasmsNeoplasm InvasivenessCoculture TechniquesAntigens, NeoplasmImmunohistochemistryImmunotherapyFlow CytometryCell SurvivalCell CommunicationMyeloid CellsApoptosisReverse Transcriptase Polymerase Chain ReactionCell Growth ProcessesOvarian NeoplasmsPancreatic NeoplasmsAngiogenesis InhibitorsNeoplasm ProteinsColonic NeoplasmsAdenocarcinomaNeoplastic Stem CellsSpheroids, CellularFibroblastsCarcinoma, Lewis LungTumor Cells, CulturedAntibodies, MonoclonalGene Expression ProfilingDisease Models, AnimalGenes, Tumor SuppressorMammary Neoplasms, AnimalTumor Suppressor Protein p53Cell DivisionGliomaBlotting, WesternMice, TransgenicGlioblastomaLung NeoplasmsParacrine CommunicationModels, BiologicalRNA, Small InterferingFibrosarcomaWilms TumorCancer VaccinesExtracellular MatrixRNA, MessengerCells, CulturedMacrophagesMelanomaUp-RegulationTumor Suppressor ProteinsLiver NeoplasmsCytokinesTransfectionDrug Delivery SystemsCarcinoma, Squamous CellCell AdhesionCell LineCarcinoid TumorT-LymphocytesCell DifferentiationT-Lymphocytes, RegulatoryMolecular Targeted TherapyMice, KnockoutVascular Endothelial Growth Factor ASkin NeoplasmsEndothelial CellsPhenotypeTime FactorsKidney NeoplasmsDendritic Cells