Tumor MicroenvironmentCell Line, TumorNeoplasmsCellular MicroenvironmentNeovascularization, PathologicStromal CellsTumor BurdenCell ProliferationTumor Markers, BiologicalTumor EscapeLymphocytes, Tumor-InfiltratingNeoplasm MetastasisSignal TransductionNeoplasms, ExperimentalCell HypoxiaMice, Inbred C57BLTumor Necrosis Factor-alphaCell MovementMice, NudeGene Expression Regulation, NeoplasticMammary Neoplasms, ExperimentalTransplantation, HeterologousMice, SCIDMelanoma, ExperimentalNeoplasm TransplantationXenograft Model Antitumor AssaysMice, Inbred BALB CCoculture TechniquesDisease ProgressionBrain NeoplasmsImmunotherapyBreast NeoplasmsCell CommunicationImmunohistochemistryMyeloid CellsAngiogenesis InhibitorsCarcinoma, Lewis LungMice, TransgenicEndothelial CellsAntineoplastic AgentsCell Transformation, NeoplasticFibroblastsNeoplasm InvasivenessModels, BiologicalReverse Transcriptase Polymerase Chain ReactionFlow CytometryMammary Neoplasms, AnimalAntigens, NeoplasmParacrine CommunicationOvarian NeoplasmsDisease Models, AnimalNeoplasm ProteinsExtracellular MatrixCells, CulturedAdenocarcinomaGene Expression ProfilingNeoplastic Stem CellsMacrophagesCell SurvivalWilms TumorPancreatic NeoplasmsCancer VaccinesMice, KnockoutTumor Suppressor Protein p53RNA, MessengerGliomaGenes, Tumor SuppressorGlioblastomaCytokinesBlood VesselsApoptosisColonic NeoplasmsCell DifferentiationVascular Endothelial Growth Factor ATumor Suppressor ProteinsBlotting, WesternMolecular Targeted TherapyT-LymphocytesSkin NeoplasmsCarcinoid TumorAntibodies, MonoclonalUp-RegulationCell Growth ProcessesT-Lymphocytes, RegulatoryFibrosarcomaSpheroids, CellularAnoxiaCell DivisionHypoxia-Inducible Factor 1, alpha SubunitDendritic CellsLung NeoplasmsPhenotypePericytesLiver NeoplasmsAntigens, CD31Neuroendocrine TumorsEndothelium, VascularCulture Media, ConditionedTime FactorsCD8-Positive T-Lymphocytes